Pileus Git - ~andy/gtk/blob - gtk/gtkiconview.c

   1 /* gtkiconview.c
   2  * Copyright (C) 2002, 2004  Anders Carlsson <andersca@gnu.org>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library. If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "config.h"
  19
  20 #include <string.h>
  21
  22 #include "gtkiconview.h"
  23 #include "gtkiconviewprivate.h"
  24
  25 #include "gtkadjustment.h"
  26 #include "gtkcelllayout.h"
  27 #include "gtkcellrenderer.h"
  28 #include "gtkcellareabox.h"
  29 #include "gtkcellareacontext.h"
  30 #include "gtkcellrenderertext.h"
  31 #include "gtkcellrendererpixbuf.h"
  32 #include "gtkorientable.h"
  33 #include "gtkmarshalers.h"
  34 #include "gtkbindings.h"
  35 #include "gtkdnd.h"
  36 #include "gtkmain.h"
  37 #include "gtkintl.h"
  38 #include "gtkaccessible.h"
  39 #include "gtkwindow.h"
  40 #include "gtkentry.h"
  41 #include "gtkcombobox.h"
  42 #include "gtkscrollable.h"
  43 #include "gtksizerequest.h"
  44 #include "gtktreednd.h"
  45 #include "gtktypebuiltins.h"
  46 #include "gtkprivate.h"
  47 #include "a11y/gtkiconviewaccessible.h"
  48
  49 /**
  50  * SECTION:gtkiconview
  51  * @title: GtkIconView
  52  * @short_description: A widget which displays a list of icons in a grid
  53  *
  54  * #GtkIconView provides an alternative view on a #GtkTreeModel.
  55  * It displays the model as a grid of icons with labels. Like
  56  * #GtkTreeView, it allows to select one or multiple items
  57  * (depending on the selection mode, see gtk_icon_view_set_selection_mode()).
  58  * In addition to selection with the arrow keys, #GtkIconView supports
  59  * rubberband selection, which is controlled by dragging the pointer.
  60  *
  61  * Note that if the tree model is backed by an actual tree store (as
  62  * opposed to a flat list where the mapping to icons is obvious),
  63  * #GtkIconView will only display the first level of the tree and
  64  * ignore the tree's branches.
  65  */
  66
  67 #define SCROLL_EDGE_SIZE 15
  68
  69 typedef struct _GtkIconViewChild GtkIconViewChild;
  70 struct _GtkIconViewChild
  71 {
  72   GtkWidget    *widget;
  73   GdkRectangle  area;
  74 };
  75
  76 /* Signals */
  77 enum
  78 {
  79   ITEM_ACTIVATED,
  80   SELECTION_CHANGED,
  81   SELECT_ALL,
  82   UNSELECT_ALL,
  83   SELECT_CURSOR_ITEM,
  84   TOGGLE_CURSOR_ITEM,
  85   MOVE_CURSOR,
  86   ACTIVATE_CURSOR_ITEM,
  87   LAST_SIGNAL
  88 };
  89
  90 /* Properties */
  91 enum
  92 {
  93   PROP_0,
  94   PROP_PIXBUF_COLUMN,
  95   PROP_TEXT_COLUMN,
  96   PROP_MARKUP_COLUMN,
  97   PROP_SELECTION_MODE,
  98   PROP_ITEM_ORIENTATION,
  99   PROP_MODEL,
 100   PROP_COLUMNS,
 101   PROP_ITEM_WIDTH,
 102   PROP_SPACING,
 103   PROP_ROW_SPACING,
 104   PROP_COLUMN_SPACING,
 105   PROP_MARGIN,
 106   PROP_REORDERABLE,
 107   PROP_TOOLTIP_COLUMN,
 108   PROP_ITEM_PADDING,
 109   PROP_CELL_AREA,
 110
 111   /* For scrollable interface */
 112   PROP_HADJUSTMENT,
 113   PROP_VADJUSTMENT,
 114   PROP_HSCROLL_POLICY,
 115   PROP_VSCROLL_POLICY
 116 };
 117
 118 /* GObject vfuncs */
 119 static void             gtk_icon_view_cell_layout_init          (GtkCellLayoutIface *iface);
 120 static void             gtk_icon_view_dispose                   (GObject            *object);
 121 static GObject         *gtk_icon_view_constructor               (GType               type,
 122                                                                  guint               n_construct_properties,
 123                                                                  GObjectConstructParam *construct_properties);
 124 static void             gtk_icon_view_set_property              (GObject            *object,
 125                                                                  guint               prop_id,
 126                                                                  const GValue       *value,
 127                                                                  GParamSpec         *pspec);
 128 static void             gtk_icon_view_get_property              (GObject            *object,
 129                                                                  guint               prop_id,
 130                                                                  GValue             *value,
 131                                                                  GParamSpec         *pspec);
 132 /* GtkWidget vfuncs */
 133 static void             gtk_icon_view_destroy                   (GtkWidget          *widget);
 134 static void             gtk_icon_view_realize                   (GtkWidget          *widget);
 135 static void             gtk_icon_view_unrealize                 (GtkWidget          *widget);
 136 static void             gtk_icon_view_style_updated             (GtkWidget          *widget);
 137 static void             gtk_icon_view_state_flags_changed       (GtkWidget          *widget,
 138                                                                  GtkStateFlags       previous_state);
 139 static GtkSizeRequestMode gtk_icon_view_get_request_mode        (GtkWidget          *widget);
 140 static void             gtk_icon_view_get_preferred_width       (GtkWidget          *widget,
 141                                                                  gint               *minimum,
 142                                                                  gint               *natural);
 143 static void             gtk_icon_view_get_preferred_width_for_height
 144                                                                 (GtkWidget          *widget,
 145                                                                  gint                height,
 146                                                                  gint               *minimum,
 147                                                                  gint               *natural);
 148 static void             gtk_icon_view_get_preferred_height      (GtkWidget          *widget,
 149                                                                  gint               *minimum,
 150                                                                  gint               *natural);
 151 static void             gtk_icon_view_get_preferred_height_for_width
 152                                                                 (GtkWidget          *widget,
 153                                                                  gint                width,
 154                                                                  gint               *minimum,
 155                                                                  gint               *natural);
 156 static void             gtk_icon_view_size_allocate             (GtkWidget          *widget,
 157                                                                  GtkAllocation      *allocation);
 158 static gboolean         gtk_icon_view_draw                      (GtkWidget          *widget,
 159                                                                  cairo_t            *cr);
 160 static gboolean         gtk_icon_view_motion                    (GtkWidget          *widget,
 161                                                                  GdkEventMotion     *event);
 162 static gboolean         gtk_icon_view_button_press              (GtkWidget          *widget,
 163                                                                  GdkEventButton     *event);
 164 static gboolean         gtk_icon_view_button_release            (GtkWidget          *widget,
 165                                                                  GdkEventButton     *event);
 166 static gboolean         gtk_icon_view_key_press                 (GtkWidget          *widget,
 167                                                                  GdkEventKey        *event);
 168 static gboolean         gtk_icon_view_key_release               (GtkWidget          *widget,
 169                                                                  GdkEventKey        *event);
 170
 171
 172 /* GtkContainer vfuncs */
 173 static void             gtk_icon_view_remove                    (GtkContainer       *container,
 174                                                                  GtkWidget          *widget);
 175 static void             gtk_icon_view_forall                    (GtkContainer       *container,
 176                                                                  gboolean            include_internals,
 177                                                                  GtkCallback         callback,
 178                                                                  gpointer            callback_data);
 179
 180 /* GtkIconView vfuncs */
 181 static void             gtk_icon_view_real_select_all           (GtkIconView        *icon_view);
 182 static void             gtk_icon_view_real_unselect_all         (GtkIconView        *icon_view);
 183 static void             gtk_icon_view_real_select_cursor_item   (GtkIconView        *icon_view);
 184 static void             gtk_icon_view_real_toggle_cursor_item   (GtkIconView        *icon_view);
 185 static gboolean         gtk_icon_view_real_activate_cursor_item (GtkIconView        *icon_view);
 186
 187  /* Internal functions */
 188 static void                 gtk_icon_view_set_hadjustment_values         (GtkIconView            *icon_view);
 189 static void                 gtk_icon_view_set_vadjustment_values         (GtkIconView            *icon_view);
 190 static void                 gtk_icon_view_set_hadjustment                (GtkIconView            *icon_view,
 191                                                                           GtkAdjustment          *adjustment);
 192 static void                 gtk_icon_view_set_vadjustment                (GtkIconView            *icon_view,
 193                                                                           GtkAdjustment          *adjustment);
 194 static void                 gtk_icon_view_adjustment_changed             (GtkAdjustment          *adjustment,
 195                                                                           GtkIconView            *icon_view);
 196 static void                 gtk_icon_view_layout                         (GtkIconView            *icon_view);
 197 static void                 gtk_icon_view_paint_item                     (GtkIconView            *icon_view,
 198                                                                           cairo_t                *cr,
 199                                                                           GtkIconViewItem        *item,
 200                                                                           gint                    x,
 201                                                                           gint                    y,
 202                                                                           gboolean                draw_focus);
 203 static void                 gtk_icon_view_paint_rubberband               (GtkIconView            *icon_view,
 204                                                                           cairo_t                *cr);
 205 static void                 gtk_icon_view_queue_draw_path                (GtkIconView *icon_view,
 206                                                                           GtkTreePath *path);
 207 static void                 gtk_icon_view_queue_draw_item                (GtkIconView            *icon_view,
 208                                                                           GtkIconViewItem        *item);
 209 static void                 gtk_icon_view_start_rubberbanding            (GtkIconView            *icon_view,
 210                                                                           GdkDevice              *device,
 211                                                                           gint                    x,
 212                                                                           gint                    y);
 213 static void                 gtk_icon_view_stop_rubberbanding             (GtkIconView            *icon_view);
 214 static void                 gtk_icon_view_update_rubberband_selection    (GtkIconView            *icon_view);
 215 static gboolean             gtk_icon_view_item_hit_test                  (GtkIconView            *icon_view,
 216                                                                           GtkIconViewItem        *item,
 217                                                                           gint                    x,
 218                                                                           gint                    y,
 219                                                                           gint                    width,
 220                                                                           gint                    height);
 221 static gboolean             gtk_icon_view_unselect_all_internal          (GtkIconView            *icon_view);
 222 static void                 gtk_icon_view_update_rubberband              (gpointer                data);
 223 static void                 gtk_icon_view_item_invalidate_size           (GtkIconViewItem        *item);
 224 static void                 gtk_icon_view_invalidate_sizes               (GtkIconView            *icon_view);
 225 static void                 gtk_icon_view_add_move_binding               (GtkBindingSet          *binding_set,
 226                                                                           guint                   keyval,
 227                                                                           guint                   modmask,
 228                                                                           GtkMovementStep         step,
 229                                                                           gint                    count);
 230 static gboolean             gtk_icon_view_real_move_cursor               (GtkIconView            *icon_view,
 231                                                                           GtkMovementStep         step,
 232                                                                           gint                    count);
 233 static void                 gtk_icon_view_move_cursor_up_down            (GtkIconView            *icon_view,
 234                                                                           gint                    count);
 235 static void                 gtk_icon_view_move_cursor_page_up_down       (GtkIconView            *icon_view,
 236                                                                           gint                    count);
 237 static void                 gtk_icon_view_move_cursor_left_right         (GtkIconView            *icon_view,
 238                                                                           gint                    count);
 239 static void                 gtk_icon_view_move_cursor_start_end          (GtkIconView            *icon_view,
 240                                                                           gint                    count);
 241 static void                 gtk_icon_view_scroll_to_item                 (GtkIconView            *icon_view,
 242                                                                           GtkIconViewItem        *item);
 243 static gboolean             gtk_icon_view_select_all_between             (GtkIconView            *icon_view,
 244                                                                           GtkIconViewItem        *anchor,
 245                                                                           GtkIconViewItem        *cursor);
 246
 247 static void                 gtk_icon_view_ensure_cell_area               (GtkIconView            *icon_view,
 248                                                                           GtkCellArea            *cell_area);
 249
 250 static GtkCellArea         *gtk_icon_view_cell_layout_get_area           (GtkCellLayout          *layout);
 251
 252 static void                 gtk_icon_view_item_selected_changed          (GtkIconView            *icon_view,
 253                                                                           GtkIconViewItem        *item);
 254
 255 static void                 gtk_icon_view_add_editable                   (GtkCellArea            *area,
 256                                                                           GtkCellRenderer        *renderer,
 257                                                                           GtkCellEditable        *editable,
 258                                                                           GdkRectangle           *cell_area,
 259                                                                           const gchar            *path,
 260                                                                           GtkIconView            *icon_view);
 261 static void                 gtk_icon_view_remove_editable                (GtkCellArea            *area,
 262                                                                           GtkCellRenderer        *renderer,
 263                                                                           GtkCellEditable        *editable,
 264                                                                           GtkIconView            *icon_view);
 265 static void                 update_text_cell                             (GtkIconView            *icon_view);
 266 static void                 update_pixbuf_cell                           (GtkIconView            *icon_view);
 267
 268 /* Source side drag signals */
 269 static void gtk_icon_view_drag_begin       (GtkWidget        *widget,
 270                                             GdkDragContext   *context);
 271 static void gtk_icon_view_drag_end         (GtkWidget        *widget,
 272                                             GdkDragContext   *context);
 273 static void gtk_icon_view_drag_data_get    (GtkWidget        *widget,
 274                                             GdkDragContext   *context,
 275                                             GtkSelectionData *selection_data,
 276                                             guint             info,
 277                                             guint             time);
 278 static void gtk_icon_view_drag_data_delete (GtkWidget        *widget,
 279                                             GdkDragContext   *context);
 280
 281 /* Target side drag signals */
 282 static void     gtk_icon_view_drag_leave         (GtkWidget        *widget,
 283                                                   GdkDragContext   *context,
 284                                                   guint             time);
 285 static gboolean gtk_icon_view_drag_motion        (GtkWidget        *widget,
 286                                                   GdkDragContext   *context,
 287                                                   gint              x,
 288                                                   gint              y,
 289                                                   guint             time);
 290 static gboolean gtk_icon_view_drag_drop          (GtkWidget        *widget,
 291                                                   GdkDragContext   *context,
 292                                                   gint              x,
 293                                                   gint              y,
 294                                                   guint             time);
 295 static void     gtk_icon_view_drag_data_received (GtkWidget        *widget,
 296                                                   GdkDragContext   *context,
 297                                                   gint              x,
 298                                                   gint              y,
 299                                                   GtkSelectionData *selection_data,
 300                                                   guint             info,
 301                                                   guint             time);
 302 static gboolean gtk_icon_view_maybe_begin_drag   (GtkIconView             *icon_view,
 303                                                   GdkEventMotion          *event);
 304
 305 static void     remove_scroll_timeout            (GtkIconView *icon_view);
 306
 307 /* GtkBuildable */
 308 static GtkBuildableIface *parent_buildable_iface;
 309 static void     gtk_icon_view_buildable_init             (GtkBuildableIface *iface);
 310 static gboolean gtk_icon_view_buildable_custom_tag_start (GtkBuildable  *buildable,
 311                                                           GtkBuilder    *builder,
 312                                                           GObject       *child,
 313                                                           const gchar   *tagname,
 314                                                           GMarkupParser *parser,
 315                                                           gpointer      *data);
 316 static void     gtk_icon_view_buildable_custom_tag_end   (GtkBuildable  *buildable,
 317                                                           GtkBuilder    *builder,
 318                                                           GObject       *child,
 319                                                           const gchar   *tagname,
 320                                                           gpointer      *data);
 321
 322 static guint icon_view_signals[LAST_SIGNAL] = { 0 };
 323
 324 G_DEFINE_TYPE_WITH_CODE (GtkIconView, gtk_icon_view, GTK_TYPE_CONTAINER,
 325                          G_IMPLEMENT_INTERFACE (GTK_TYPE_CELL_LAYOUT,
 326                                                 gtk_icon_view_cell_layout_init)
 327                          G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
 328                                                 gtk_icon_view_buildable_init)
 329                          G_IMPLEMENT_INTERFACE (GTK_TYPE_SCROLLABLE, NULL))
 330
 331 static void
 332 gtk_icon_view_class_init (GtkIconViewClass *klass)
 333 {
 334   GObjectClass *gobject_class;
 335   GtkWidgetClass *widget_class;
 336   GtkContainerClass *container_class;
 337   GtkBindingSet *binding_set;
 338
 339   binding_set = gtk_binding_set_by_class (klass);
 340
 341   g_type_class_add_private (klass, sizeof (GtkIconViewPrivate));
 342
 343   gobject_class = (GObjectClass *) klass;
 344   widget_class = (GtkWidgetClass *) klass;
 345   container_class = (GtkContainerClass *) klass;
 346
 347   gobject_class->constructor = gtk_icon_view_constructor;
 348   gobject_class->dispose = gtk_icon_view_dispose;
 349   gobject_class->set_property = gtk_icon_view_set_property;
 350   gobject_class->get_property = gtk_icon_view_get_property;
 351
 352   widget_class->destroy = gtk_icon_view_destroy;
 353   widget_class->realize = gtk_icon_view_realize;
 354   widget_class->unrealize = gtk_icon_view_unrealize;
 355   widget_class->style_updated = gtk_icon_view_style_updated;
 356   widget_class->get_request_mode = gtk_icon_view_get_request_mode;
 357   widget_class->get_preferred_width = gtk_icon_view_get_preferred_width;
 358   widget_class->get_preferred_height = gtk_icon_view_get_preferred_height;
 359   widget_class->get_preferred_width_for_height = gtk_icon_view_get_preferred_width_for_height;
 360   widget_class->get_preferred_height_for_width = gtk_icon_view_get_preferred_height_for_width;
 361   widget_class->size_allocate = gtk_icon_view_size_allocate;
 362   widget_class->draw = gtk_icon_view_draw;
 363   widget_class->motion_notify_event = gtk_icon_view_motion;
 364   widget_class->button_press_event = gtk_icon_view_button_press;
 365   widget_class->button_release_event = gtk_icon_view_button_release;
 366   widget_class->key_press_event = gtk_icon_view_key_press;
 367   widget_class->key_release_event = gtk_icon_view_key_release;
 368   widget_class->drag_begin = gtk_icon_view_drag_begin;
 369   widget_class->drag_end = gtk_icon_view_drag_end;
 370   widget_class->drag_data_get = gtk_icon_view_drag_data_get;
 371   widget_class->drag_data_delete = gtk_icon_view_drag_data_delete;
 372   widget_class->drag_leave = gtk_icon_view_drag_leave;
 373   widget_class->drag_motion = gtk_icon_view_drag_motion;
 374   widget_class->drag_drop = gtk_icon_view_drag_drop;
 375   widget_class->drag_data_received = gtk_icon_view_drag_data_received;
 376   widget_class->state_flags_changed = gtk_icon_view_state_flags_changed;
 377
 378   container_class->remove = gtk_icon_view_remove;
 379   container_class->forall = gtk_icon_view_forall;
 380
 381   klass->select_all = gtk_icon_view_real_select_all;
 382   klass->unselect_all = gtk_icon_view_real_unselect_all;
 383   klass->select_cursor_item = gtk_icon_view_real_select_cursor_item;
 384   klass->toggle_cursor_item = gtk_icon_view_real_toggle_cursor_item;
 385   klass->activate_cursor_item = gtk_icon_view_real_activate_cursor_item;
 386   klass->move_cursor = gtk_icon_view_real_move_cursor;
 387
 388   /* Properties */
 389   /**
 390    * GtkIconView:selection-mode:
 391    *
 392    * The ::selection-mode property specifies the selection mode of
 393    * icon view. If the mode is #GTK_SELECTION_MULTIPLE, rubberband selection
 394    * is enabled, for the other modes, only keyboard selection is possible.
 395    *
 396    * Since: 2.6
 397    */
 398   g_object_class_install_property (gobject_class,
 399                                    PROP_SELECTION_MODE,
 400                                    g_param_spec_enum ("selection-mode",
 401                                                       P_("Selection mode"),
 402                                                       P_("The selection mode"),
 403                                                       GTK_TYPE_SELECTION_MODE,
 404                                                       GTK_SELECTION_SINGLE,
 405                                                       GTK_PARAM_READWRITE));
 406
 407   /**
 408    * GtkIconView:pixbuf-column:
 409    *
 410    * The ::pixbuf-column property contains the number of the model column
 411    * containing the pixbufs which are displayed. The pixbuf column must be
 412    * of type #GDK_TYPE_PIXBUF. Setting this property to -1 turns off the
 413    * display of pixbufs.
 414    *
 415    * Since: 2.6
 416    */
 417   g_object_class_install_property (gobject_class,
 418                                    PROP_PIXBUF_COLUMN,
 419                                    g_param_spec_int ("pixbuf-column",
 420                                                      P_("Pixbuf column"),
 421                                                      P_("Model column used to retrieve the icon pixbuf from"),
 422                                                      -1, G_MAXINT, -1,
 423                                                      GTK_PARAM_READWRITE));
 424
 425   /**
 426    * GtkIconView:text-column:
 427    *
 428    * The ::text-column property contains the number of the model column
 429    * containing the texts which are displayed. The text column must be
 430    * of type #G_TYPE_STRING. If this property and the :markup-column
 431    * property are both set to -1, no texts are displayed.
 432    *
 433    * Since: 2.6
 434    */
 435   g_object_class_install_property (gobject_class,
 436                                    PROP_TEXT_COLUMN,
 437                                    g_param_spec_int ("text-column",
 438                                                      P_("Text column"),
 439                                                      P_("Model column used to retrieve the text from"),
 440                                                      -1, G_MAXINT, -1,
 441                                                      GTK_PARAM_READWRITE));
 442
 443
 444   /**
 445    * GtkIconView:markup-column:
 446    *
 447    * The ::markup-column property contains the number of the model column
 448    * containing markup information to be displayed. The markup column must be
 449    * of type #G_TYPE_STRING. If this property and the :text-column property
 450    * are both set to column numbers, it overrides the text column.
 451    * If both are set to -1, no texts are displayed.
 452    *
 453    * Since: 2.6
 454    */
 455   g_object_class_install_property (gobject_class,
 456                                    PROP_MARKUP_COLUMN,
 457                                    g_param_spec_int ("markup-column",
 458                                                      P_("Markup column"),
 459                                                      P_("Model column used to retrieve the text if using Pango markup"),
 460                                                      -1, G_MAXINT, -1,
 461                                                      GTK_PARAM_READWRITE));
 462
 463   g_object_class_install_property (gobject_class,
 464                                    PROP_MODEL,
 465                                    g_param_spec_object ("model",
 466                                                         P_("Icon View Model"),
 467                                                         P_("The model for the icon view"),
 468                                                         GTK_TYPE_TREE_MODEL,
 469                                                         GTK_PARAM_READWRITE));
 470
 471   /**
 472    * GtkIconView:columns:
 473    *
 474    * The columns property contains the number of the columns in which the
 475    * items should be displayed. If it is -1, the number of columns will
 476    * be chosen automatically to fill the available area.
 477    *
 478    * Since: 2.6
 479    */
 480   g_object_class_install_property (gobject_class,
 481                                    PROP_COLUMNS,
 482                                    g_param_spec_int ("columns",
 483                                                      P_("Number of columns"),
 484                                                      P_("Number of columns to display"),
 485                                                      -1, G_MAXINT, -1,
 486                                                      GTK_PARAM_READWRITE));
 487
 488
 489   /**
 490    * GtkIconView:item-width:
 491    *
 492    * The item-width property specifies the width to use for each item.
 493    * If it is set to -1, the icon view will automatically determine a
 494    * suitable item size.
 495    *
 496    * Since: 2.6
 497    */
 498   g_object_class_install_property (gobject_class,
 499                                    PROP_ITEM_WIDTH,
 500                                    g_param_spec_int ("item-width",
 501                                                      P_("Width for each item"),
 502                                                      P_("The width used for each item"),
 503                                                      -1, G_MAXINT, -1,
 504                                                      GTK_PARAM_READWRITE));
 505
 506   /**
 507    * GtkIconView:spacing:
 508    *
 509    * The spacing property specifies the space which is inserted between
 510    * the cells (i.e. the icon and the text) of an item.
 511    *
 512    * Since: 2.6
 513    */
 514   g_object_class_install_property (gobject_class,
 515                                    PROP_SPACING,
 516                                    g_param_spec_int ("spacing",
 517                                                      P_("Spacing"),
 518                                                      P_("Space which is inserted between cells of an item"),
 519                                                      0, G_MAXINT, 0,
 520                                                      GTK_PARAM_READWRITE));
 521
 522   /**
 523    * GtkIconView:row-spacing:
 524    *
 525    * The row-spacing property specifies the space which is inserted between
 526    * the rows of the icon view.
 527    *
 528    * Since: 2.6
 529    */
 530   g_object_class_install_property (gobject_class,
 531                                    PROP_ROW_SPACING,
 532                                    g_param_spec_int ("row-spacing",
 533                                                      P_("Row Spacing"),
 534                                                      P_("Space which is inserted between grid rows"),
 535                                                      0, G_MAXINT, 6,
 536                                                      GTK_PARAM_READWRITE));
 537
 538   /**
 539    * GtkIconView:column-spacing:
 540    *
 541    * The column-spacing property specifies the space which is inserted between
 542    * the columns of the icon view.
 543    *
 544    * Since: 2.6
 545    */
 546   g_object_class_install_property (gobject_class,
 547                                    PROP_COLUMN_SPACING,
 548                                    g_param_spec_int ("column-spacing",
 549                                                      P_("Column Spacing"),
 550                                                      P_("Space which is inserted between grid columns"),
 551                                                      0, G_MAXINT, 6,
 552                                                      GTK_PARAM_READWRITE));
 553
 554   /**
 555    * GtkIconView:margin:
 556    *
 557    * The margin property specifies the space which is inserted
 558    * at the edges of the icon view.
 559    *
 560    * Since: 2.6
 561    */
 562   g_object_class_install_property (gobject_class,
 563                                    PROP_MARGIN,
 564                                    g_param_spec_int ("margin",
 565                                                      P_("Margin"),
 566                                                      P_("Space which is inserted at the edges of the icon view"),
 567                                                      0, G_MAXINT, 6,
 568                                                      GTK_PARAM_READWRITE));
 569
 570   /**
 571    * GtkIconView:item-orientation:
 572    *
 573    * The item-orientation property specifies how the cells (i.e. the icon and
 574    * the text) of the item are positioned relative to each other.
 575    *
 576    * Since: 2.6
 577    */
 578   g_object_class_install_property (gobject_class,
 579                                    PROP_ITEM_ORIENTATION,
 580                                    g_param_spec_enum ("item-orientation",
 581                                                       P_("Item Orientation"),
 582                                                       P_("How the text and icon of each item are positioned relative to each other"),
 583                                                       GTK_TYPE_ORIENTATION,
 584                                                       GTK_ORIENTATION_VERTICAL,
 585                                                       GTK_PARAM_READWRITE));
 586
 587   /**
 588    * GtkIconView:reorderable:
 589    *
 590    * The reorderable property specifies if the items can be reordered
 591    * by DND.
 592    *
 593    * Since: 2.8
 594    */
 595   g_object_class_install_property (gobject_class,
 596                                    PROP_REORDERABLE,
 597                                    g_param_spec_boolean ("reorderable",
 598                                                          P_("Reorderable"),
 599                                                          P_("View is reorderable"),
 600                                                          FALSE,
 601                                                          G_PARAM_READWRITE));
 602
 603     g_object_class_install_property (gobject_class,
 604                                      PROP_TOOLTIP_COLUMN,
 605                                      g_param_spec_int ("tooltip-column",
 606                                                        P_("Tooltip Column"),
 607                                                        P_("The column in the model containing the tooltip texts for the items"),
 608                                                        -1,
 609                                                        G_MAXINT,
 610                                                        -1,
 611                                                        GTK_PARAM_READWRITE));
 612
 613   /**
 614    * GtkIconView:item-padding:
 615    *
 616    * The item-padding property specifies the padding around each
 617    * of the icon view's item.
 618    *
 619    * Since: 2.18
 620    */
 621   g_object_class_install_property (gobject_class,
 622                                    PROP_ITEM_PADDING,
 623                                    g_param_spec_int ("item-padding",
 624                                                      P_("Item Padding"),
 625                                                      P_("Padding around icon view items"),
 626                                                      0, G_MAXINT, 6,
 627                                                      GTK_PARAM_READWRITE));
 628
 629   /**
 630    * GtkIconView:cell-area:
 631    *
 632    * The #GtkCellArea used to layout cell renderers for this view.
 633    *
 634    * If no area is specified when creating the icon view with gtk_icon_view_new_with_area()
 635    * a #GtkCellAreaBox will be used.
 636    *
 637    * Since: 3.0
 638    */
 639   g_object_class_install_property (gobject_class,
 640                                    PROP_CELL_AREA,
 641                                    g_param_spec_object ("cell-area",
 642                                                         P_("Cell Area"),
 643                                                         P_("The GtkCellArea used to layout cells"),
 644                                                         GTK_TYPE_CELL_AREA,
 645                                                         GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
 646
 647   /* Scrollable interface properties */
 648   g_object_class_override_property (gobject_class, PROP_HADJUSTMENT,    "hadjustment");
 649   g_object_class_override_property (gobject_class, PROP_VADJUSTMENT,    "vadjustment");
 650   g_object_class_override_property (gobject_class, PROP_HSCROLL_POLICY, "hscroll-policy");
 651   g_object_class_override_property (gobject_class, PROP_VSCROLL_POLICY, "vscroll-policy");
 652
 653   /* Style properties */
 654   gtk_widget_class_install_style_property (widget_class,
 655                                            g_param_spec_boxed ("selection-box-color",
 656                                                                P_("Selection Box Color"),
 657                                                                P_("Color of the selection box"),
 658                                                                GDK_TYPE_COLOR,
 659                                                                GTK_PARAM_READABLE));
 660
 661   gtk_widget_class_install_style_property (widget_class,
 662                                            g_param_spec_uchar ("selection-box-alpha",
 663                                                                P_("Selection Box Alpha"),
 664                                                                P_("Opacity of the selection box"),
 665                                                                0, 0xff,
 666                                                                0x40,
 667                                                                GTK_PARAM_READABLE));
 668
 669   /* Signals */
 670   /**
 671    * GtkIconView::item-activated:
 672    * @iconview: the object on which the signal is emitted
 673    * @path: the #GtkTreePath for the activated item
 674    *
 675    * The ::item-activated signal is emitted when the method
 676    * gtk_icon_view_item_activated() is called or the user double
 677    * clicks an item. It is also emitted when a non-editable item
 678    * is selected and one of the keys: Space, Return or Enter is
 679    * pressed.
 680    */
 681   icon_view_signals[ITEM_ACTIVATED] =
 682     g_signal_new (I_("item-activated"),
 683                   G_TYPE_FROM_CLASS (gobject_class),
 684                   G_SIGNAL_RUN_LAST,
 685                   G_STRUCT_OFFSET (GtkIconViewClass, item_activated),
 686                   NULL, NULL,
 687                   g_cclosure_marshal_VOID__BOXED,
 688                   G_TYPE_NONE, 1,
 689                   GTK_TYPE_TREE_PATH);
 690
 691   /**
 692    * GtkIconView::selection-changed:
 693    * @iconview: the object on which the signal is emitted
 694    *
 695    * The ::selection-changed signal is emitted when the selection
 696    * (i.e. the set of selected items) changes.
 697    */
 698   icon_view_signals[SELECTION_CHANGED] =
 699     g_signal_new (I_("selection-changed"),
 700                   G_TYPE_FROM_CLASS (gobject_class),
 701                   G_SIGNAL_RUN_FIRST,
 702                   G_STRUCT_OFFSET (GtkIconViewClass, selection_changed),
 703                   NULL, NULL,
 704                   g_cclosure_marshal_VOID__VOID,
 705                   G_TYPE_NONE, 0);
 706
 707   /**
 708    * GtkIconView::select-all:
 709    * @iconview: the object on which the signal is emitted
 710    *
 711    * A <link linkend="keybinding-signals">keybinding signal</link>
 712    * which gets emitted when the user selects all items.
 713    *
 714    * Applications should not connect to it, but may emit it with
 715    * g_signal_emit_by_name() if they need to control selection
 716    * programmatically.
 717    *
 718    * The default binding for this signal is Ctrl-a.
 719    */
 720   icon_view_signals[SELECT_ALL] =
 721     g_signal_new (I_("select-all"),
 722                   G_TYPE_FROM_CLASS (gobject_class),
 723                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 724                   G_STRUCT_OFFSET (GtkIconViewClass, select_all),
 725                   NULL, NULL,
 726                   g_cclosure_marshal_VOID__VOID,
 727                   G_TYPE_NONE, 0);
 728
 729   /**
 730    * GtkIconView::unselect-all:
 731    * @iconview: the object on which the signal is emitted
 732    *
 733    * A <link linkend="keybinding-signals">keybinding signal</link>
 734    * which gets emitted when the user unselects all items.
 735    *
 736    * Applications should not connect to it, but may emit it with
 737    * g_signal_emit_by_name() if they need to control selection
 738    * programmatically.
 739    *
 740    * The default binding for this signal is Ctrl-Shift-a.
 741    */
 742   icon_view_signals[UNSELECT_ALL] =
 743     g_signal_new (I_("unselect-all"),
 744                   G_TYPE_FROM_CLASS (gobject_class),
 745                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 746                   G_STRUCT_OFFSET (GtkIconViewClass, unselect_all),
 747                   NULL, NULL,
 748                   g_cclosure_marshal_VOID__VOID,
 749                   G_TYPE_NONE, 0);
 750
 751   /**
 752    * GtkIconView::select-cursor-item:
 753    * @iconview: the object on which the signal is emitted
 754    *
 755    * A <link linkend="keybinding-signals">keybinding signal</link>
 756    * which gets emitted when the user selects the item that is currently
 757    * focused.
 758    *
 759    * Applications should not connect to it, but may emit it with
 760    * g_signal_emit_by_name() if they need to control selection
 761    * programmatically.
 762    *
 763    * There is no default binding for this signal.
 764    */
 765   icon_view_signals[SELECT_CURSOR_ITEM] =
 766     g_signal_new (I_("select-cursor-item"),
 767                   G_TYPE_FROM_CLASS (gobject_class),
 768                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 769                   G_STRUCT_OFFSET (GtkIconViewClass, select_cursor_item),
 770                   NULL, NULL,
 771                   g_cclosure_marshal_VOID__VOID,
 772                   G_TYPE_NONE, 0);
 773
 774   /**
 775    * GtkIconView::toggle-cursor-item:
 776    * @iconview: the object on which the signal is emitted
 777    *
 778    * A <link linkend="keybinding-signals">keybinding signal</link>
 779    * which gets emitted when the user toggles whether the currently
 780    * focused item is selected or not. The exact effect of this
 781    * depend on the selection mode.
 782    *
 783    * Applications should not connect to it, but may emit it with
 784    * g_signal_emit_by_name() if they need to control selection
 785    * programmatically.
 786    *
 787    * There is no default binding for this signal is Ctrl-Space.
 788    */
 789   icon_view_signals[TOGGLE_CURSOR_ITEM] =
 790     g_signal_new (I_("toggle-cursor-item"),
 791                   G_TYPE_FROM_CLASS (gobject_class),
 792                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 793                   G_STRUCT_OFFSET (GtkIconViewClass, toggle_cursor_item),
 794                   NULL, NULL,
 795                   g_cclosure_marshal_VOID__VOID,
 796                   G_TYPE_NONE, 0);
 797
 798   /**
 799    * GtkIconView::activate-cursor-item:
 800    * @iconview: the object on which the signal is emitted
 801    *
 802    * A <link linkend="keybinding-signals">keybinding signal</link>
 803    * which gets emitted when the user activates the currently
 804    * focused item.
 805    *
 806    * Applications should not connect to it, but may emit it with
 807    * g_signal_emit_by_name() if they need to control activation
 808    * programmatically.
 809    *
 810    * The default bindings for this signal are Space, Return and Enter.
 811    */
 812   icon_view_signals[ACTIVATE_CURSOR_ITEM] =
 813     g_signal_new (I_("activate-cursor-item"),
 814                   G_TYPE_FROM_CLASS (gobject_class),
 815                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 816                   G_STRUCT_OFFSET (GtkIconViewClass, activate_cursor_item),
 817                   NULL, NULL,
 818                   _gtk_marshal_BOOLEAN__VOID,
 819                   G_TYPE_BOOLEAN, 0);
 820
 821   /**
 822    * GtkIconView::move-cursor:
 823    * @iconview: the object which received the signal
 824    * @step: the granularity of the move, as a #GtkMovementStep
 825    * @count: the number of @step units to move
 826    *
 827    * The ::move-cursor signal is a
 828    * <link linkend="keybinding-signals">keybinding signal</link>
 829    * which gets emitted when the user initiates a cursor movement.
 830    *
 831    * Applications should not connect to it, but may emit it with
 832    * g_signal_emit_by_name() if they need to control the cursor
 833    * programmatically.
 834    *
 835    * The default bindings for this signal include
 836    * <itemizedlist>
 837    * <listitem>Arrow keys which move by individual steps</listitem>
 838    * <listitem>Home/End keys which move to the first/last item</listitem>
 839    * <listitem>PageUp/PageDown which move by "pages"</listitem>
 840    * </itemizedlist>
 841    *
 842    * All of these will extend the selection when combined with
 843    * the Shift modifier.
 844    */
 845   icon_view_signals[MOVE_CURSOR] =
 846     g_signal_new (I_("move-cursor"),
 847                   G_TYPE_FROM_CLASS (gobject_class),
 848                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 849                   G_STRUCT_OFFSET (GtkIconViewClass, move_cursor),
 850                   NULL, NULL,
 851                   _gtk_marshal_BOOLEAN__ENUM_INT,
 852                   G_TYPE_BOOLEAN, 2,
 853                   GTK_TYPE_MOVEMENT_STEP,
 854                   G_TYPE_INT);
 855
 856   /* Key bindings */
 857   gtk_binding_entry_add_signal (binding_set, GDK_KEY_a, GDK_CONTROL_MASK,
 858                                 "select-all", 0);
 859   gtk_binding_entry_add_signal (binding_set, GDK_KEY_a, GDK_CONTROL_MASK | GDK_SHIFT_MASK,
 860                                 "unselect-all", 0);
 861   gtk_binding_entry_add_signal (binding_set, GDK_KEY_space, GDK_CONTROL_MASK,
 862                                 "toggle-cursor-item", 0);
 863   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Space, GDK_CONTROL_MASK,
 864                                 "toggle-cursor-item", 0);
 865
 866   gtk_binding_entry_add_signal (binding_set, GDK_KEY_space, 0,
 867                                 "activate-cursor-item", 0);
 868   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Space, 0,
 869                                 "activate-cursor-item", 0);
 870   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Return, 0,
 871                                 "activate-cursor-item", 0);
 872   gtk_binding_entry_add_signal (binding_set, GDK_KEY_ISO_Enter, 0,
 873                                 "activate-cursor-item", 0);
 874   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Enter, 0,
 875                                 "activate-cursor-item", 0);
 876
 877   gtk_icon_view_add_move_binding (binding_set, GDK_KEY_Up, 0,
 878                                   GTK_MOVEMENT_DISPLAY_LINES, -1);
 879   gtk_icon_view_add_move_binding (binding_set, GDK_KEY_KP_Up, 0,
 880                                   GTK_MOVEMENT_DISPLAY_LINES, -1);
 881
 882   gtk_icon_view_add_move_binding (binding_set, GDK_KEY_Down, 0,
 883                                   GTK_MOVEMENT_DISPLAY_LINES, 1);
 884   gtk_icon_view_add_move_binding (binding_set, GDK_KEY_KP_Down, 0,
 885                                   GTK_MOVEMENT_DISPLAY_LINES, 1);
 886
 887   gtk_icon_view_add_move_binding (binding_set, GDK_KEY_p, GDK_CONTROL_MASK,
 888                                   GTK_MOVEMENT_DISPLAY_LINES, -1);
 889
 890   gtk_icon_view_add_move_binding (binding_set, GDK_KEY_n, GDK_CONTROL_MASK,
 891                                   GTK_MOVEMENT_DISPLAY_LINES, 1);
 892
 893   gtk_icon_view_add_move_binding (binding_set, GDK_KEY_Home, 0,
 894                                   GTK_MOVEMENT_BUFFER_ENDS, -1);
 895   gtk_icon_view_add_move_binding (binding_set, GDK_KEY_KP_Home, 0,
 896                                   GTK_MOVEMENT_BUFFER_ENDS, -1);
 897
 898   gtk_icon_view_add_move_binding (binding_set, GDK_KEY_End, 0,
 899                                   GTK_MOVEMENT_BUFFER_ENDS, 1);
 900   gtk_icon_view_add_move_binding (binding_set, GDK_KEY_KP_End, 0,
 901                                   GTK_MOVEMENT_BUFFER_ENDS, 1);
 902
 903   gtk_icon_view_add_move_binding (binding_set, GDK_KEY_Page_Up, 0,
 904                                   GTK_MOVEMENT_PAGES, -1);
 905   gtk_icon_view_add_move_binding (binding_set, GDK_KEY_KP_Page_Up, 0,
 906                                   GTK_MOVEMENT_PAGES, -1);
 907
 908   gtk_icon_view_add_move_binding (binding_set, GDK_KEY_Page_Down, 0,
 909                                   GTK_MOVEMENT_PAGES, 1);
 910   gtk_icon_view_add_move_binding (binding_set, GDK_KEY_KP_Page_Down, 0,
 911                                   GTK_MOVEMENT_PAGES, 1);
 912
 913   gtk_icon_view_add_move_binding (binding_set, GDK_KEY_Right, 0,
 914                                   GTK_MOVEMENT_VISUAL_POSITIONS, 1);
 915   gtk_icon_view_add_move_binding (binding_set, GDK_KEY_Left, 0,
 916                                   GTK_MOVEMENT_VISUAL_POSITIONS, -1);
 917
 918   gtk_icon_view_add_move_binding (binding_set, GDK_KEY_KP_Right, 0,
 919                                   GTK_MOVEMENT_VISUAL_POSITIONS, 1);
 920   gtk_icon_view_add_move_binding (binding_set, GDK_KEY_KP_Left, 0,
 921                                   GTK_MOVEMENT_VISUAL_POSITIONS, -1);
 922
 923   gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_ICON_VIEW_ACCESSIBLE);
 924 }
 925
 926 static void
 927 gtk_icon_view_buildable_init (GtkBuildableIface *iface)
 928 {
 929   parent_buildable_iface = g_type_interface_peek_parent (iface);
 930   iface->add_child = _gtk_cell_layout_buildable_add_child;
 931   iface->custom_tag_start = gtk_icon_view_buildable_custom_tag_start;
 932   iface->custom_tag_end = gtk_icon_view_buildable_custom_tag_end;
 933 }
 934
 935 static void
 936 gtk_icon_view_cell_layout_init (GtkCellLayoutIface *iface)
 937 {
 938   iface->get_area = gtk_icon_view_cell_layout_get_area;
 939 }
 940
 941 static void
 942 gtk_icon_view_init (GtkIconView *icon_view)
 943 {
 944   icon_view->priv = G_TYPE_INSTANCE_GET_PRIVATE (icon_view,
 945                                                  GTK_TYPE_ICON_VIEW,
 946                                                  GtkIconViewPrivate);
 947
 948   icon_view->priv->width = 0;
 949   icon_view->priv->height = 0;
 950   icon_view->priv->selection_mode = GTK_SELECTION_SINGLE;
 951   icon_view->priv->pressed_button = -1;
 952   icon_view->priv->press_start_x = -1;
 953   icon_view->priv->press_start_y = -1;
 954   icon_view->priv->text_column = -1;
 955   icon_view->priv->markup_column = -1;
 956   icon_view->priv->pixbuf_column = -1;
 957   icon_view->priv->text_cell = NULL;
 958   icon_view->priv->pixbuf_cell = NULL;
 959   icon_view->priv->tooltip_column = -1;
 960
 961   gtk_widget_set_can_focus (GTK_WIDGET (icon_view), TRUE);
 962
 963   icon_view->priv->item_orientation = GTK_ORIENTATION_VERTICAL;
 964
 965   icon_view->priv->columns = -1;
 966   icon_view->priv->item_width = -1;
 967   icon_view->priv->spacing = 0;
 968   icon_view->priv->row_spacing = 6;
 969   icon_view->priv->column_spacing = 6;
 970   icon_view->priv->margin = 6;
 971   icon_view->priv->item_padding = 6;
 972
 973   icon_view->priv->draw_focus = TRUE;
 974
 975   icon_view->priv->row_contexts =
 976     g_ptr_array_new_with_free_func ((GDestroyNotify)g_object_unref);
 977 }
 978
 979 /* GObject methods */
 980 static GObject *
 981 gtk_icon_view_constructor (GType               type,
 982                            guint               n_construct_properties,
 983                            GObjectConstructParam *construct_properties)
 984 {
 985   GtkIconView        *icon_view;
 986   GObject            *object;
 987
 988   object = G_OBJECT_CLASS (gtk_icon_view_parent_class)->constructor
 989     (type, n_construct_properties, construct_properties);
 990
 991   icon_view = (GtkIconView *) object;
 992
 993   gtk_icon_view_ensure_cell_area (icon_view, NULL);
 994
 995   return object;
 996 }
 997
 998 static void
 999 gtk_icon_view_dispose (GObject *object)
1000 {
1001   GtkIconView *icon_view;
1002   GtkIconViewPrivate *priv;
1003
1004   icon_view = GTK_ICON_VIEW (object);
1005   priv      = icon_view->priv;
1006
1007   if (priv->cell_area_context)
1008     {
1009       g_object_unref (priv->cell_area_context);
1010       priv->cell_area_context = NULL;
1011     }
1012
1013   if (priv->row_contexts)
1014     {
1015       g_ptr_array_free (priv->row_contexts, TRUE);
1016       priv->row_contexts = NULL;
1017     }
1018
1019   if (priv->cell_area)
1020     {
1021       gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
1022
1023       g_signal_handler_disconnect (priv->cell_area, priv->add_editable_id);
1024       g_signal_handler_disconnect (priv->cell_area, priv->remove_editable_id);
1025       priv->add_editable_id = 0;
1026       priv->remove_editable_id = 0;
1027
1028       g_object_unref (priv->cell_area);
1029       priv->cell_area = NULL;
1030     }
1031
1032   G_OBJECT_CLASS (gtk_icon_view_parent_class)->dispose (object);
1033 }
1034
1035 static void
1036 gtk_icon_view_set_property (GObject      *object,
1037                             guint         prop_id,
1038                             const GValue *value,
1039                             GParamSpec   *pspec)
1040 {
1041   GtkIconView *icon_view;
1042   GtkCellArea *area;
1043
1044   icon_view = GTK_ICON_VIEW (object);
1045
1046   switch (prop_id)
1047     {
1048     case PROP_SELECTION_MODE:
1049       gtk_icon_view_set_selection_mode (icon_view, g_value_get_enum (value));
1050       break;
1051     case PROP_PIXBUF_COLUMN:
1052       gtk_icon_view_set_pixbuf_column (icon_view, g_value_get_int (value));
1053       break;
1054     case PROP_TEXT_COLUMN:
1055       gtk_icon_view_set_text_column (icon_view, g_value_get_int (value));
1056       break;
1057     case PROP_MARKUP_COLUMN:
1058       gtk_icon_view_set_markup_column (icon_view, g_value_get_int (value));
1059       break;
1060     case PROP_MODEL:
1061       gtk_icon_view_set_model (icon_view, g_value_get_object (value));
1062       break;
1063     case PROP_ITEM_ORIENTATION:
1064       gtk_icon_view_set_item_orientation (icon_view, g_value_get_enum (value));
1065       break;
1066     case PROP_COLUMNS:
1067       gtk_icon_view_set_columns (icon_view, g_value_get_int (value));
1068       break;
1069     case PROP_ITEM_WIDTH:
1070       gtk_icon_view_set_item_width (icon_view, g_value_get_int (value));
1071       break;
1072     case PROP_SPACING:
1073       gtk_icon_view_set_spacing (icon_view, g_value_get_int (value));
1074       break;
1075     case PROP_ROW_SPACING:
1076       gtk_icon_view_set_row_spacing (icon_view, g_value_get_int (value));
1077       break;
1078     case PROP_COLUMN_SPACING:
1079       gtk_icon_view_set_column_spacing (icon_view, g_value_get_int (value));
1080       break;
1081     case PROP_MARGIN:
1082       gtk_icon_view_set_margin (icon_view, g_value_get_int (value));
1083       break;
1084     case PROP_REORDERABLE:
1085       gtk_icon_view_set_reorderable (icon_view, g_value_get_boolean (value));
1086       break;
1087
1088     case PROP_TOOLTIP_COLUMN:
1089       gtk_icon_view_set_tooltip_column (icon_view, g_value_get_int (value));
1090       break;
1091
1092     case PROP_ITEM_PADDING:
1093       gtk_icon_view_set_item_padding (icon_view, g_value_get_int (value));
1094       break;
1095
1096     case PROP_CELL_AREA:
1097       /* Construct-only, can only be assigned once */
1098       area = g_value_get_object (value);
1099       if (area)
1100         {
1101           if (icon_view->priv->cell_area != NULL)
1102             {
1103               g_warning ("cell-area has already been set, ignoring construct property");
1104               g_object_ref_sink (area);
1105               g_object_unref (area);
1106             }
1107           else
1108             gtk_icon_view_ensure_cell_area (icon_view, area);
1109         }
1110       break;
1111
1112     case PROP_HADJUSTMENT:
1113       gtk_icon_view_set_hadjustment (icon_view, g_value_get_object (value));
1114       break;
1115     case PROP_VADJUSTMENT:
1116       gtk_icon_view_set_vadjustment (icon_view, g_value_get_object (value));
1117       break;
1118     case PROP_HSCROLL_POLICY:
1119       icon_view->priv->hscroll_policy = g_value_get_enum (value);
1120       gtk_widget_queue_resize (GTK_WIDGET (icon_view));
1121       break;
1122     case PROP_VSCROLL_POLICY:
1123       icon_view->priv->vscroll_policy = g_value_get_enum (value);
1124       gtk_widget_queue_resize (GTK_WIDGET (icon_view));
1125       break;
1126
1127     default:
1128       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1129       break;
1130     }
1131 }
1132
1133 static void
1134 gtk_icon_view_get_property (GObject      *object,
1135                             guint         prop_id,
1136                             GValue       *value,
1137                             GParamSpec   *pspec)
1138 {
1139   GtkIconView *icon_view;
1140
1141   icon_view = GTK_ICON_VIEW (object);
1142
1143   switch (prop_id)
1144     {
1145     case PROP_SELECTION_MODE:
1146       g_value_set_enum (value, icon_view->priv->selection_mode);
1147       break;
1148     case PROP_PIXBUF_COLUMN:
1149       g_value_set_int (value, icon_view->priv->pixbuf_column);
1150       break;
1151     case PROP_TEXT_COLUMN:
1152       g_value_set_int (value, icon_view->priv->text_column);
1153       break;
1154     case PROP_MARKUP_COLUMN:
1155       g_value_set_int (value, icon_view->priv->markup_column);
1156       break;
1157     case PROP_MODEL:
1158       g_value_set_object (value, icon_view->priv->model);
1159       break;
1160     case PROP_ITEM_ORIENTATION:
1161       g_value_set_enum (value, icon_view->priv->item_orientation);
1162       break;
1163     case PROP_COLUMNS:
1164       g_value_set_int (value, icon_view->priv->columns);
1165       break;
1166     case PROP_ITEM_WIDTH:
1167       g_value_set_int (value, icon_view->priv->item_width);
1168       break;
1169     case PROP_SPACING:
1170       g_value_set_int (value, icon_view->priv->spacing);
1171       break;
1172     case PROP_ROW_SPACING:
1173       g_value_set_int (value, icon_view->priv->row_spacing);
1174       break;
1175     case PROP_COLUMN_SPACING:
1176       g_value_set_int (value, icon_view->priv->column_spacing);
1177       break;
1178     case PROP_MARGIN:
1179       g_value_set_int (value, icon_view->priv->margin);
1180       break;
1181     case PROP_REORDERABLE:
1182       g_value_set_boolean (value, icon_view->priv->reorderable);
1183       break;
1184     case PROP_TOOLTIP_COLUMN:
1185       g_value_set_int (value, icon_view->priv->tooltip_column);
1186       break;
1187
1188     case PROP_ITEM_PADDING:
1189       g_value_set_int (value, icon_view->priv->item_padding);
1190       break;
1191
1192     case PROP_CELL_AREA:
1193       g_value_set_object (value, icon_view->priv->cell_area);
1194       break;
1195
1196     case PROP_HADJUSTMENT:
1197       g_value_set_object (value, icon_view->priv->hadjustment);
1198       break;
1199     case PROP_VADJUSTMENT:
1200       g_value_set_object (value, icon_view->priv->vadjustment);
1201       break;
1202     case PROP_HSCROLL_POLICY:
1203       g_value_set_enum (value, icon_view->priv->hscroll_policy);
1204       break;
1205     case PROP_VSCROLL_POLICY:
1206       g_value_set_enum (value, icon_view->priv->vscroll_policy);
1207       break;
1208
1209     default:
1210       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1211       break;
1212     }
1213 }
1214
1215 /* GtkWidget methods */
1216 static void
1217 gtk_icon_view_destroy (GtkWidget *widget)
1218 {
1219   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
1220
1221   gtk_icon_view_set_model (icon_view, NULL);
1222
1223   if (icon_view->priv->scroll_to_path != NULL)
1224     {
1225       gtk_tree_row_reference_free (icon_view->priv->scroll_to_path);
1226       icon_view->priv->scroll_to_path = NULL;
1227     }
1228
1229   remove_scroll_timeout (icon_view);
1230
1231   if (icon_view->priv->hadjustment != NULL)
1232     {
1233       g_object_unref (icon_view->priv->hadjustment);
1234       icon_view->priv->hadjustment = NULL;
1235     }
1236
1237   if (icon_view->priv->vadjustment != NULL)
1238     {
1239       g_object_unref (icon_view->priv->vadjustment);
1240       icon_view->priv->vadjustment = NULL;
1241     }
1242
1243   GTK_WIDGET_CLASS (gtk_icon_view_parent_class)->destroy (widget);
1244 }
1245
1246 static void
1247 gtk_icon_view_realize (GtkWidget *widget)
1248 {
1249   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
1250   GtkAllocation allocation;
1251   GdkWindow *window;
1252   GdkWindowAttr attributes;
1253   gint attributes_mask;
1254   GtkStyleContext *context;
1255
1256   gtk_widget_set_realized (widget, TRUE);
1257
1258   gtk_widget_get_allocation (widget, &allocation);
1259
1260   /* Make the main, clipping window */
1261   attributes.window_type = GDK_WINDOW_CHILD;
1262   attributes.x = allocation.x;
1263   attributes.y = allocation.y;
1264   attributes.width = allocation.width;
1265   attributes.height = allocation.height;
1266   attributes.wclass = GDK_INPUT_OUTPUT;
1267   attributes.visual = gtk_widget_get_visual (widget);
1268   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK;
1269
1270   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
1271
1272   window = gdk_window_new (gtk_widget_get_parent_window (widget),
1273                            &attributes, attributes_mask);
1274   gtk_widget_set_window (widget, window);
1275   gdk_window_set_user_data (window, widget);
1276
1277   gtk_widget_get_allocation (widget, &allocation);
1278
1279   /* Make the window for the icon view */
1280   attributes.x = 0;
1281   attributes.y = 0;
1282   attributes.width = MAX (icon_view->priv->width, allocation.width);
1283   attributes.height = MAX (icon_view->priv->height, allocation.height);
1284   attributes.event_mask = (GDK_EXPOSURE_MASK |
1285                            GDK_SCROLL_MASK |
1286                            GDK_SMOOTH_SCROLL_MASK |
1287                            GDK_POINTER_MOTION_MASK |
1288                            GDK_BUTTON_PRESS_MASK |
1289                            GDK_BUTTON_RELEASE_MASK |
1290                            GDK_KEY_PRESS_MASK |
1291                            GDK_KEY_RELEASE_MASK) |
1292     gtk_widget_get_events (widget);
1293
1294   icon_view->priv->bin_window = gdk_window_new (window,
1295                                                 &attributes, attributes_mask);
1296   gdk_window_set_user_data (icon_view->priv->bin_window, widget);
1297
1298   context = gtk_widget_get_style_context (widget);
1299
1300   gtk_style_context_save (context);
1301   gtk_style_context_add_class (context, GTK_STYLE_CLASS_VIEW);
1302   gtk_style_context_set_background (context, icon_view->priv->bin_window);
1303   gtk_style_context_set_background (context, window);
1304   gtk_style_context_restore (context);
1305
1306   gdk_window_show (icon_view->priv->bin_window);
1307 }
1308
1309 static void
1310 gtk_icon_view_unrealize (GtkWidget *widget)
1311 {
1312   GtkIconView *icon_view;
1313
1314   icon_view = GTK_ICON_VIEW (widget);
1315
1316   gdk_window_set_user_data (icon_view->priv->bin_window, NULL);
1317   gdk_window_destroy (icon_view->priv->bin_window);
1318   icon_view->priv->bin_window = NULL;
1319
1320   GTK_WIDGET_CLASS (gtk_icon_view_parent_class)->unrealize (widget);
1321 }
1322
1323 static void
1324 _gtk_icon_view_update_background (GtkIconView *icon_view)
1325 {
1326   GtkWidget *widget = GTK_WIDGET (icon_view);
1327
1328   if (gtk_widget_get_realized (widget))
1329     {
1330       GtkStyleContext *context;
1331
1332       context = gtk_widget_get_style_context (widget);
1333
1334       gtk_style_context_save (context);
1335       gtk_style_context_add_class (context, GTK_STYLE_CLASS_VIEW);
1336
1337       gtk_style_context_set_background (context, gtk_widget_get_window (widget));
1338       gtk_style_context_set_background (context, icon_view->priv->bin_window);
1339
1340       gtk_style_context_restore (context);
1341     }
1342 }
1343
1344 static void
1345 gtk_icon_view_state_flags_changed (GtkWidget     *widget,
1346                                    GtkStateFlags  previous_state)
1347 {
1348   _gtk_icon_view_update_background (GTK_ICON_VIEW (widget));
1349   gtk_widget_queue_draw (widget);
1350 }
1351
1352 static void
1353 gtk_icon_view_style_updated (GtkWidget *widget)
1354 {
1355   GTK_WIDGET_CLASS (gtk_icon_view_parent_class)->style_updated (widget);
1356
1357   _gtk_icon_view_update_background (GTK_ICON_VIEW (widget));
1358   gtk_widget_queue_resize (widget);
1359 }
1360
1361 static gint
1362 gtk_icon_view_get_n_items (GtkIconView *icon_view)
1363 {
1364   GtkIconViewPrivate *priv = icon_view->priv;
1365
1366   if (priv->model == NULL)
1367     return 0;
1368
1369   return gtk_tree_model_iter_n_children (priv->model, NULL);
1370 }
1371
1372 static void
1373 adjust_wrap_width (GtkIconView *icon_view)
1374 {
1375   if (icon_view->priv->text_cell)
1376     {
1377       gint wrap_width = 50;
1378
1379       /* Here we go with the same old guess, try the icon size and set double
1380        * the size of the first icon found in the list, naive but works much
1381        * of the time */
1382       if (icon_view->priv->items && icon_view->priv->pixbuf_cell)
1383         {
1384           gtk_cell_renderer_get_preferred_width (icon_view->priv->pixbuf_cell,
1385                                                  GTK_WIDGET (icon_view),
1386                                                  &wrap_width, NULL);
1387
1388           wrap_width = MAX (wrap_width * 2, 50);
1389         }
1390
1391       g_object_set (icon_view->priv->text_cell, "wrap-width", wrap_width, NULL);
1392       g_object_set (icon_view->priv->text_cell, "width", wrap_width, NULL);
1393     }
1394 }
1395
1396 /* General notes about layout
1397  *
1398  * The icon view is layouted like this:
1399  *
1400  * +----------+  s  +----------+
1401  * | padding  |  p  | padding  |
1402  * | +------+ |  a  | +------+ |
1403  * | | cell | |  c  | | cell | |
1404  * | +------+ |  i  | +------+ |
1405  * |          |  n  |          |
1406  * +----------+  g  +----------+
1407  *
1408  * In size request and allocation code, there are 3 sizes that are used:
1409  * * cell size
1410  *   This is the size returned by gtk_cell_area_get_preferred_foo(). In places
1411  *   where code is interacting with the cell area and renderers this is useful.
1412  * * padded size
1413  *   This is the cell size plus the item padding on each side.
1414  * * spaced size
1415  *   This is the padded size plus the spacing. This is what's used for most
1416  *   calculations because it can (ab)use the following formula:
1417  *   iconview_size = 2 * margin + n_items * spaced_size - spacing
1418  * So when reading this code and fixing my bugs where I confuse these two, be
1419  * aware of this distinction.
1420  */
1421 static void
1422 cell_area_get_preferred_size (GtkIconView        *icon_view,
1423                               GtkCellAreaContext *context,
1424                               GtkOrientation      orientation,
1425                               gint                for_size,
1426                               gint               *minimum,
1427                               gint               *natural)
1428 {
1429   if (orientation == GTK_ORIENTATION_HORIZONTAL)
1430     {
1431       if (for_size > 0)
1432         gtk_cell_area_get_preferred_width_for_height (icon_view->priv->cell_area,
1433                                                       context,
1434                                                       GTK_WIDGET (icon_view),
1435                                                       for_size,
1436                                                       minimum, natural);
1437       else
1438         gtk_cell_area_get_preferred_width (icon_view->priv->cell_area,
1439                                            context,
1440                                            GTK_WIDGET (icon_view),
1441                                            minimum, natural);
1442     }
1443   else
1444     {
1445       if (for_size > 0)
1446         gtk_cell_area_get_preferred_height_for_width (icon_view->priv->cell_area,
1447                                                       context,
1448                                                       GTK_WIDGET (icon_view),
1449                                                       for_size,
1450                                                       minimum, natural);
1451       else
1452         gtk_cell_area_get_preferred_height (icon_view->priv->cell_area,
1453                                             context,
1454                                             GTK_WIDGET (icon_view),
1455                                             minimum, natural);
1456     }
1457 }
1458
1459 static gboolean
1460 gtk_icon_view_is_empty (GtkIconView *icon_view)
1461 {
1462   return icon_view->priv->items == NULL;
1463 }
1464
1465 static void
1466 gtk_icon_view_get_preferred_item_size (GtkIconView    *icon_view,
1467                                        GtkOrientation  orientation,
1468                                        gint            for_size,
1469                                        gint           *minimum,
1470                                        gint           *natural)
1471 {
1472   GtkIconViewPrivate *priv = icon_view->priv;
1473   GtkCellAreaContext *context;
1474   GList *items;
1475
1476   g_assert (!gtk_icon_view_is_empty (icon_view));
1477
1478   context = gtk_cell_area_create_context (priv->cell_area);
1479
1480   for_size -= 2 * priv->item_padding;
1481
1482   if (for_size > 0)
1483     {
1484       /* This is necessary for the context to work properly */
1485       for (items = priv->items; items; items = items->next)
1486         {
1487           GtkIconViewItem *item = items->data;
1488
1489           _gtk_icon_view_set_cell_data (icon_view, item);
1490           cell_area_get_preferred_size (icon_view, context, 1 - orientation, -1, NULL, NULL);
1491         }
1492     }
1493
1494   for (items = priv->items; items; items = items->next)
1495     {
1496       GtkIconViewItem *item = items->data;
1497
1498       _gtk_icon_view_set_cell_data (icon_view, item);
1499       if (items == priv->items)
1500         adjust_wrap_width (icon_view);
1501       cell_area_get_preferred_size (icon_view, context, orientation, for_size, NULL, NULL);
1502     }
1503
1504   if (orientation == GTK_ORIENTATION_HORIZONTAL)
1505     {
1506       if (for_size > 0)
1507         gtk_cell_area_context_get_preferred_width_for_height (context,
1508                                                               for_size,
1509                                                               minimum, natural);
1510       else
1511         gtk_cell_area_context_get_preferred_width (context,
1512                                                    minimum, natural);
1513     }
1514   else
1515     {
1516       if (for_size > 0)
1517         gtk_cell_area_context_get_preferred_height_for_width (context,
1518                                                               for_size,
1519                                                               minimum, natural);
1520       else
1521         gtk_cell_area_context_get_preferred_height (context,
1522                                                     minimum, natural);
1523     }
1524
1525   if (orientation == GTK_ORIENTATION_HORIZONTAL && priv->item_width >= 0)
1526     {
1527       if (minimum)
1528         *minimum = MAX (*minimum, priv->item_width);
1529       if (natural)
1530         *natural = *minimum;
1531     }
1532
1533   if (minimum)
1534     *minimum = MAX (1, *minimum + 2 * priv->item_padding);
1535   if (natural)
1536     *natural = MAX (1, *natural + 2 * priv->item_padding);
1537
1538   g_object_unref (context);
1539 }
1540
1541 static void
1542 gtk_icon_view_compute_n_items_for_size (GtkIconView    *icon_view,
1543                                         GtkOrientation  orientation,
1544                                         gint            size,
1545                                         gint           *min_items,
1546                                         gint           *min_item_size,
1547                                         gint           *max_items,
1548                                         gint           *max_item_size)
1549 {
1550   GtkIconViewPrivate *priv = icon_view->priv;
1551   int minimum, natural, spacing;
1552
1553   g_return_if_fail (min_item_size == NULL || min_items != NULL);
1554   g_return_if_fail (max_item_size == NULL || max_items != NULL);
1555   g_return_if_fail (!gtk_icon_view_is_empty (icon_view));
1556
1557   gtk_icon_view_get_preferred_item_size (icon_view, orientation, -1, &minimum, &natural);
1558
1559   if (orientation == GTK_ORIENTATION_HORIZONTAL)
1560     spacing = priv->column_spacing;
1561   else
1562     spacing = priv->row_spacing;
1563
1564   size -= 2 * priv->margin;
1565   size += spacing;
1566   minimum += spacing;
1567   natural += spacing;
1568
1569   if (priv->columns > 0)
1570     {
1571       if (orientation == GTK_ORIENTATION_HORIZONTAL)
1572         {
1573           if (min_items)
1574             *min_items = priv->columns;
1575           if (max_items)
1576             *max_items = priv->columns;
1577         }
1578       else
1579         {
1580           int n_items = gtk_icon_view_get_n_items (icon_view);
1581
1582           if (min_items)
1583             *min_items = (n_items + priv->columns - 1) / priv->columns;
1584           if (max_items)
1585             *max_items = (n_items + priv->columns - 1) / priv->columns;
1586         }
1587     }
1588   else
1589     {
1590       if (max_items)
1591         {
1592           if (size <= minimum)
1593             *max_items = 1;
1594           else
1595             *max_items = size / minimum;
1596         }
1597
1598       if (min_items)
1599         {
1600           if (size <= natural)
1601             *min_items = 1;
1602           else
1603             *min_items = size / natural;
1604         }
1605     }
1606
1607   if (min_item_size)
1608     {
1609       *min_item_size = size / *min_items;
1610       *min_item_size = CLAMP (*min_item_size, minimum, natural);
1611       *min_item_size -= spacing;
1612       *min_item_size -= 2 * priv->item_padding;
1613     }
1614
1615   if (max_item_size)
1616     {
1617       *max_item_size = size / *max_items;
1618       *max_item_size = CLAMP (*max_item_size, minimum, natural);
1619       *max_item_size -= spacing;
1620       *max_item_size -= 2 * priv->item_padding;
1621     }
1622 }
1623
1624 static GtkSizeRequestMode
1625 gtk_icon_view_get_request_mode (GtkWidget *widget)
1626 {
1627   return GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH;
1628 }
1629
1630 static void
1631 gtk_icon_view_get_preferred_width (GtkWidget *widget,
1632                                    gint      *minimum,
1633                                    gint      *natural)
1634 {
1635   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
1636   GtkIconViewPrivate *priv = icon_view->priv;
1637   int item_min, item_nat;
1638
1639   if (gtk_icon_view_is_empty (icon_view))
1640     {
1641       *minimum = *natural = 2 * priv->margin;
1642       return;
1643     }
1644
1645   gtk_icon_view_get_preferred_item_size (icon_view, GTK_ORIENTATION_HORIZONTAL, -1, &item_min, &item_nat);
1646
1647   if (priv->columns > 0)
1648     {
1649       *minimum = item_min * priv->columns + priv->column_spacing * (priv->columns - 1);
1650       *natural = item_nat * priv->columns + priv->column_spacing * (priv->columns - 1);
1651     }
1652   else
1653     {
1654       int n_items = gtk_icon_view_get_n_items (icon_view);
1655
1656       *minimum = item_min;
1657       *natural = item_nat * n_items + priv->column_spacing * (n_items - 1);
1658     }
1659
1660   *minimum += 2 * priv->margin;
1661   *natural += 2 * priv->margin;
1662 }
1663
1664 static void
1665 gtk_icon_view_get_preferred_width_for_height (GtkWidget *widget,
1666                                               gint       height,
1667                                               gint      *minimum,
1668                                               gint      *natural)
1669 {
1670   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
1671   GtkIconViewPrivate *priv = icon_view->priv;
1672   int item_min, item_nat, rows, row_height, n_items;
1673
1674   if (gtk_icon_view_is_empty (icon_view))
1675     {
1676       *minimum = *natural = 2 * priv->margin;
1677       return;
1678     }
1679
1680   gtk_icon_view_compute_n_items_for_size (icon_view, GTK_ORIENTATION_VERTICAL, height, &rows, &row_height, NULL, NULL);
1681   n_items = gtk_icon_view_get_n_items (icon_view);
1682
1683   gtk_icon_view_get_preferred_item_size (icon_view, GTK_ORIENTATION_HORIZONTAL, row_height, &item_min, &item_nat);
1684   *minimum = (item_min + priv->column_spacing) * ((n_items + rows - 1) / rows) - priv->column_spacing;
1685   *natural = (item_nat + priv->column_spacing) * ((n_items + rows - 1) / rows) - priv->column_spacing;
1686
1687   *minimum += 2 * priv->margin;
1688   *natural += 2 * priv->margin;
1689 }
1690
1691 static void
1692 gtk_icon_view_get_preferred_height (GtkWidget *widget,
1693                                     gint      *minimum,
1694                                     gint      *natural)
1695 {
1696   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
1697   GtkIconViewPrivate *priv = icon_view->priv;
1698   int item_min, item_nat, n_items;
1699
1700   if (gtk_icon_view_is_empty (icon_view))
1701     {
1702       *minimum = *natural = 2 * priv->margin;
1703       return;
1704     }
1705
1706   gtk_icon_view_get_preferred_item_size (icon_view, GTK_ORIENTATION_VERTICAL, -1, &item_min, &item_nat);
1707   n_items = gtk_icon_view_get_n_items (icon_view);
1708
1709   if (priv->columns > 0)
1710     {
1711       int n_rows = (n_items + priv->columns - 1) / priv->columns;
1712
1713       *minimum = item_min * n_rows + priv->row_spacing * (n_rows - 1);
1714       *natural = item_nat * n_rows + priv->row_spacing * (n_rows - 1);
1715     }
1716   else
1717     {
1718       *minimum = item_min;
1719       *natural = item_nat * n_items + priv->row_spacing * (n_items - 1);
1720     }
1721
1722   *minimum += 2 * priv->margin;
1723   *natural += 2 * priv->margin;
1724 }
1725
1726 static void
1727 gtk_icon_view_get_preferred_height_for_width (GtkWidget *widget,
1728                                               gint       width,
1729                                               gint      *minimum,
1730                                               gint      *natural)
1731 {
1732   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
1733   GtkIconViewPrivate *priv = icon_view->priv;
1734   int item_min, item_nat, columns, column_width, n_items;
1735
1736   if (gtk_icon_view_is_empty (icon_view))
1737     {
1738       *minimum = *natural = 2 * priv->margin;
1739       return;
1740     }
1741
1742   gtk_icon_view_compute_n_items_for_size (icon_view, GTK_ORIENTATION_HORIZONTAL, width, NULL, NULL, &columns, &column_width);
1743   n_items = gtk_icon_view_get_n_items (icon_view);
1744
1745   gtk_icon_view_get_preferred_item_size (icon_view, GTK_ORIENTATION_VERTICAL, column_width, &item_min, &item_nat);
1746   *minimum = (item_min + priv->row_spacing) * ((n_items + columns - 1) / columns) - priv->row_spacing;
1747   *natural = (item_nat + priv->row_spacing) * ((n_items + columns - 1) / columns) - priv->row_spacing;
1748
1749   *minimum += 2 * priv->margin;
1750   *natural += 2 * priv->margin;
1751 }
1752
1753 static void
1754 gtk_icon_view_allocate_children (GtkIconView *icon_view)
1755 {
1756   GList *list;
1757
1758   for (list = icon_view->priv->children; list; list = list->next)
1759     {
1760       GtkIconViewChild *child = list->data;
1761
1762       /* totally ignore our child's requisition */
1763       gtk_widget_size_allocate (child->widget, &child->area);
1764     }
1765 }
1766
1767 static void
1768 gtk_icon_view_size_allocate (GtkWidget      *widget,
1769                              GtkAllocation  *allocation)
1770 {
1771   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
1772
1773   gtk_widget_set_allocation (widget, allocation);
1774
1775   gtk_icon_view_layout (icon_view);
1776
1777   if (gtk_widget_get_realized (widget))
1778     {
1779       gdk_window_move_resize (gtk_widget_get_window (widget),
1780                               allocation->x, allocation->y,
1781                               allocation->width, allocation->height);
1782       gdk_window_resize (icon_view->priv->bin_window,
1783                          MAX (icon_view->priv->width, allocation->width),
1784                          MAX (icon_view->priv->height, allocation->height));
1785     }
1786
1787   gtk_icon_view_allocate_children (icon_view);
1788
1789   /* Delay signal emission */
1790   g_object_freeze_notify (G_OBJECT (icon_view->priv->hadjustment));
1791   g_object_freeze_notify (G_OBJECT (icon_view->priv->vadjustment));
1792
1793   gtk_icon_view_set_hadjustment_values (icon_view);
1794   gtk_icon_view_set_vadjustment_values (icon_view);
1795
1796   if (gtk_widget_get_realized (widget) &&
1797       icon_view->priv->scroll_to_path)
1798     {
1799       GtkTreePath *path;
1800       path = gtk_tree_row_reference_get_path (icon_view->priv->scroll_to_path);
1801       gtk_tree_row_reference_free (icon_view->priv->scroll_to_path);
1802       icon_view->priv->scroll_to_path = NULL;
1803
1804       gtk_icon_view_scroll_to_path (icon_view, path,
1805                                     icon_view->priv->scroll_to_use_align,
1806                                     icon_view->priv->scroll_to_row_align,
1807                                     icon_view->priv->scroll_to_col_align);
1808       gtk_tree_path_free (path);
1809     }
1810
1811   /* Emit any pending signals now */
1812   g_object_thaw_notify (G_OBJECT (icon_view->priv->hadjustment));
1813   g_object_thaw_notify (G_OBJECT (icon_view->priv->vadjustment));
1814 }
1815
1816 static gboolean
1817 gtk_icon_view_draw (GtkWidget *widget,
1818                     cairo_t   *cr)
1819 {
1820   GtkIconView *icon_view;
1821   GList *icons;
1822   GtkTreePath *path;
1823   gint dest_index;
1824   GtkIconViewDropPosition dest_pos;
1825   GtkIconViewItem *dest_item = NULL;
1826
1827   icon_view = GTK_ICON_VIEW (widget);
1828
1829   if (!gtk_cairo_should_draw_window (cr, icon_view->priv->bin_window))
1830     return FALSE;
1831
1832   cairo_save (cr);
1833
1834   gtk_cairo_transform_to_window (cr, widget, icon_view->priv->bin_window);
1835
1836   cairo_set_line_width (cr, 1.);
1837
1838   gtk_icon_view_get_drag_dest_item (icon_view, &path, &dest_pos);
1839
1840   if (path)
1841     {
1842       dest_index = gtk_tree_path_get_indices (path)[0];
1843       gtk_tree_path_free (path);
1844     }
1845   else
1846     dest_index = -1;
1847
1848   for (icons = icon_view->priv->items; icons; icons = icons->next)
1849     {
1850       GtkIconViewItem *item = icons->data;
1851       GdkRectangle paint_area;
1852
1853       paint_area.x      = item->cell_area.x      - icon_view->priv->item_padding;
1854       paint_area.y      = item->cell_area.y      - icon_view->priv->item_padding;
1855       paint_area.width  = item->cell_area.width  + icon_view->priv->item_padding * 2;
1856       paint_area.height = item->cell_area.height + icon_view->priv->item_padding * 2;
1857
1858       cairo_save (cr);
1859
1860       cairo_rectangle (cr, paint_area.x, paint_area.y, paint_area.width, paint_area.height);
1861       cairo_clip (cr);
1862
1863       if (gdk_cairo_get_clip_rectangle (cr, NULL))
1864         {
1865           gtk_icon_view_paint_item (icon_view, cr, item,
1866                                     item->cell_area.x, item->cell_area.y,
1867                                     icon_view->priv->draw_focus);
1868
1869           if (dest_index == item->index)
1870             dest_item = item;
1871         }
1872
1873       cairo_restore (cr);
1874     }
1875
1876   if (dest_item &&
1877       dest_pos != GTK_ICON_VIEW_NO_DROP)
1878     {
1879       GtkStyleContext *context;
1880       GdkRectangle rect = { 0 };
1881
1882       context = gtk_widget_get_style_context (widget);
1883
1884       switch (dest_pos)
1885         {
1886         case GTK_ICON_VIEW_DROP_INTO:
1887           rect = dest_item->cell_area;
1888           break;
1889         case GTK_ICON_VIEW_DROP_ABOVE:
1890           rect.x = dest_item->cell_area.x;
1891           rect.y = dest_item->cell_area.y - 1;
1892           rect.width = dest_item->cell_area.width;
1893           rect.height = 2;
1894           break;
1895         case GTK_ICON_VIEW_DROP_LEFT:
1896           rect.x = dest_item->cell_area.x - 1;
1897           rect.y = dest_item->cell_area.y;
1898           rect.width = 2;
1899           rect.height = dest_item->cell_area.height;
1900           break;
1901         case GTK_ICON_VIEW_DROP_BELOW:
1902           rect.x = dest_item->cell_area.x;
1903           rect.y = dest_item->cell_area.y + dest_item->cell_area.height - 1;
1904           rect.width = dest_item->cell_area.width;
1905           rect.height = 2;
1906           break;
1907         case GTK_ICON_VIEW_DROP_RIGHT:
1908           rect.x = dest_item->cell_area.x + dest_item->cell_area.width - 1;
1909           rect.y = dest_item->cell_area.y;
1910           rect.width = 2;
1911           rect.height = dest_item->cell_area.height;
1912         case GTK_ICON_VIEW_NO_DROP: ;
1913           break;
1914         }
1915
1916       gtk_render_focus (context, cr,
1917                         rect.x, rect.y,
1918                         rect.width, rect.height);
1919     }
1920
1921   if (icon_view->priv->doing_rubberband)
1922     gtk_icon_view_paint_rubberband (icon_view, cr);
1923
1924   cairo_restore (cr);
1925
1926   return GTK_WIDGET_CLASS (gtk_icon_view_parent_class)->draw (widget, cr);
1927 }
1928
1929 static gboolean
1930 rubberband_scroll_timeout (gpointer data)
1931 {
1932   GtkIconView *icon_view = data;
1933
1934   gtk_adjustment_set_value (icon_view->priv->vadjustment,
1935                             gtk_adjustment_get_value (icon_view->priv->vadjustment) +
1936                             icon_view->priv->scroll_value_diff);
1937
1938   gtk_icon_view_update_rubberband (icon_view);
1939
1940   return TRUE;
1941 }
1942
1943 static gboolean
1944 gtk_icon_view_motion (GtkWidget      *widget,
1945                       GdkEventMotion *event)
1946 {
1947   GtkAllocation allocation;
1948   GtkIconView *icon_view;
1949   gint abs_y;
1950
1951   icon_view = GTK_ICON_VIEW (widget);
1952
1953   gtk_icon_view_maybe_begin_drag (icon_view, event);
1954
1955   if (icon_view->priv->doing_rubberband)
1956     {
1957       gtk_icon_view_update_rubberband (widget);
1958
1959       abs_y = event->y - icon_view->priv->height *
1960         (gtk_adjustment_get_value (icon_view->priv->vadjustment) /
1961          (gtk_adjustment_get_upper (icon_view->priv->vadjustment) -
1962           gtk_adjustment_get_lower (icon_view->priv->vadjustment)));
1963
1964       gtk_widget_get_allocation (widget, &allocation);
1965
1966       if (abs_y < 0 || abs_y > allocation.height)
1967         {
1968           if (abs_y < 0)
1969             icon_view->priv->scroll_value_diff = abs_y;
1970           else
1971             icon_view->priv->scroll_value_diff = abs_y - allocation.height;
1972
1973           icon_view->priv->event_last_x = event->x;
1974           icon_view->priv->event_last_y = event->y;
1975
1976           if (icon_view->priv->scroll_timeout_id == 0)
1977             icon_view->priv->scroll_timeout_id = gdk_threads_add_timeout (30, rubberband_scroll_timeout,
1978                                                                 icon_view);
1979         }
1980       else
1981         remove_scroll_timeout (icon_view);
1982     }
1983   else
1984     {
1985       GtkIconViewItem *item, *last_prelight_item;
1986       GtkCellRenderer *cell = NULL;
1987
1988       last_prelight_item = icon_view->priv->last_prelight;
1989       item = _gtk_icon_view_get_item_at_coords (icon_view,
1990                                                event->x, event->y,
1991                                                FALSE,
1992                                                &cell);
1993
1994       if (item != NULL)
1995         {
1996           item->prelight = TRUE;
1997           gtk_icon_view_queue_draw_item (icon_view, item);
1998         }
1999
2000       if (last_prelight_item != NULL &&
2001           last_prelight_item != item)
2002         {
2003           last_prelight_item->prelight = FALSE;
2004           gtk_icon_view_queue_draw_item (icon_view,
2005                                          icon_view->priv->last_prelight);
2006         }
2007
2008       icon_view->priv->last_prelight = item;
2009     }
2010
2011   return TRUE;
2012 }
2013
2014 static void
2015 gtk_icon_view_remove (GtkContainer *container,
2016                       GtkWidget    *widget)
2017 {
2018   GtkIconView *icon_view;
2019   GtkIconViewChild *child = NULL;
2020   GList *tmp_list;
2021
2022   icon_view = GTK_ICON_VIEW (container);
2023
2024   tmp_list = icon_view->priv->children;
2025   while (tmp_list)
2026     {
2027       child = tmp_list->data;
2028       if (child->widget == widget)
2029         {
2030           gtk_widget_unparent (widget);
2031
2032           icon_view->priv->children = g_list_remove_link (icon_view->priv->children, tmp_list);
2033           g_list_free_1 (tmp_list);
2034           g_free (child);
2035           return;
2036         }
2037
2038       tmp_list = tmp_list->next;
2039     }
2040 }
2041
2042 static void
2043 gtk_icon_view_forall (GtkContainer *container,
2044                       gboolean      include_internals,
2045                       GtkCallback   callback,
2046                       gpointer      callback_data)
2047 {
2048   GtkIconView *icon_view;
2049   GtkIconViewChild *child = NULL;
2050   GList *tmp_list;
2051
2052   icon_view = GTK_ICON_VIEW (container);
2053
2054   tmp_list = icon_view->priv->children;
2055   while (tmp_list)
2056     {
2057       child = tmp_list->data;
2058       tmp_list = tmp_list->next;
2059
2060       (* callback) (child->widget, callback_data);
2061     }
2062 }
2063
2064 static void
2065 gtk_icon_view_item_selected_changed (GtkIconView      *icon_view,
2066                                      GtkIconViewItem  *item)
2067 {
2068   AtkObject *obj;
2069   AtkObject *item_obj;
2070
2071   obj = gtk_widget_get_accessible (GTK_WIDGET (icon_view));
2072   if (obj != NULL)
2073     {
2074       item_obj = atk_object_ref_accessible_child (obj, item->index);
2075       if (item_obj != NULL)
2076         {
2077           atk_object_notify_state_change (item_obj, ATK_STATE_SELECTED, item->selected);
2078           g_object_unref (item_obj);
2079         }
2080     }
2081 }
2082
2083 static void
2084 gtk_icon_view_add_editable (GtkCellArea            *area,
2085                             GtkCellRenderer        *renderer,
2086                             GtkCellEditable        *editable,
2087                             GdkRectangle           *cell_area,
2088                             const gchar            *path,
2089                             GtkIconView            *icon_view)
2090 {
2091   GtkIconViewChild *child;
2092   GtkWidget *widget = GTK_WIDGET (editable);
2093
2094   child = g_new (GtkIconViewChild, 1);
2095
2096   child->widget      = widget;
2097   child->area.x      = cell_area->x;
2098   child->area.y      = cell_area->y;
2099   child->area.width  = cell_area->width;
2100   child->area.height = cell_area->height;
2101
2102   icon_view->priv->children = g_list_append (icon_view->priv->children, child);
2103
2104   if (gtk_widget_get_realized (GTK_WIDGET (icon_view)))
2105     gtk_widget_set_parent_window (child->widget, icon_view->priv->bin_window);
2106
2107   gtk_widget_set_parent (widget, GTK_WIDGET (icon_view));
2108 }
2109
2110 static void
2111 gtk_icon_view_remove_editable (GtkCellArea            *area,
2112                                GtkCellRenderer        *renderer,
2113                                GtkCellEditable        *editable,
2114                                GtkIconView            *icon_view)
2115 {
2116   GtkTreePath *path;
2117
2118   if (gtk_widget_has_focus (GTK_WIDGET (editable)))
2119     gtk_widget_grab_focus (GTK_WIDGET (icon_view));
2120
2121   gtk_container_remove (GTK_CONTAINER (icon_view),
2122                         GTK_WIDGET (editable));
2123
2124   path = gtk_tree_path_new_from_string (gtk_cell_area_get_current_path_string (area));
2125   gtk_icon_view_queue_draw_path (icon_view, path);
2126   gtk_tree_path_free (path);
2127 }
2128
2129 /**
2130  * gtk_icon_view_set_cursor:
2131  * @icon_view: A #GtkIconView
2132  * @path: A #GtkTreePath
2133  * @cell: (allow-none): One of the cell renderers of @icon_view, or %NULL
2134  * @start_editing: %TRUE if the specified cell should start being edited.
2135  *
2136  * Sets the current keyboard focus to be at @path, and selects it.  This is
2137  * useful when you want to focus the user's attention on a particular item.
2138  * If @cell is not %NULL, then focus is given to the cell specified by
2139  * it. Additionally, if @start_editing is %TRUE, then editing should be
2140  * started in the specified cell.
2141  *
2142  * This function is often followed by <literal>gtk_widget_grab_focus
2143  * (icon_view)</literal> in order to give keyboard focus to the widget.
2144  * Please note that editing can only happen when the widget is realized.
2145  *
2146  * Since: 2.8
2147  **/
2148 void
2149 gtk_icon_view_set_cursor (GtkIconView     *icon_view,
2150                           GtkTreePath     *path,
2151                           GtkCellRenderer *cell,
2152                           gboolean         start_editing)
2153 {
2154   GtkIconViewItem *item = NULL;
2155
2156   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
2157   g_return_if_fail (path != NULL);
2158   g_return_if_fail (cell == NULL || GTK_IS_CELL_RENDERER (cell));
2159
2160   if (icon_view->priv->cell_area)
2161     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
2162
2163   if (gtk_tree_path_get_depth (path) == 1)
2164     item = g_list_nth_data (icon_view->priv->items,
2165                             gtk_tree_path_get_indices(path)[0]);
2166
2167   if (!item)
2168     return;
2169
2170   _gtk_icon_view_set_cursor_item (icon_view, item, cell);
2171   gtk_icon_view_scroll_to_path (icon_view, path, FALSE, 0.0, 0.0);
2172
2173   if (start_editing &&
2174       icon_view->priv->cell_area)
2175     {
2176       GtkCellAreaContext *context;
2177
2178       context = g_ptr_array_index (icon_view->priv->row_contexts, item->row);
2179       _gtk_icon_view_set_cell_data (icon_view, item);
2180       gtk_cell_area_activate (icon_view->priv->cell_area, context,
2181                               GTK_WIDGET (icon_view), &item->cell_area,
2182                               0 /* XXX flags */, TRUE);
2183     }
2184 }
2185
2186 /**
2187  * gtk_icon_view_get_cursor:
2188  * @icon_view: A #GtkIconView
2189  * @path: (out) (allow-none): Return location for the current cursor path,
2190  *        or %NULL
2191  * @cell: (out) (allow-none): Return location the current focus cell, or %NULL
2192  *
2193  * Fills in @path and @cell with the current cursor path and cell.
2194  * If the cursor isn't currently set, then *@path will be %NULL.
2195  * If no cell currently has focus, then *@cell will be %NULL.
2196  *
2197  * The returned #GtkTreePath must be freed with gtk_tree_path_free().
2198  *
2199  * Return value: %TRUE if the cursor is set.
2200  *
2201  * Since: 2.8
2202  **/
2203 gboolean
2204 gtk_icon_view_get_cursor (GtkIconView      *icon_view,
2205                           GtkTreePath     **path,
2206                           GtkCellRenderer **cell)
2207 {
2208   GtkIconViewItem *item;
2209
2210   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
2211
2212   item = icon_view->priv->cursor_item;
2213
2214   if (path != NULL)
2215     {
2216       if (item != NULL)
2217         *path = gtk_tree_path_new_from_indices (item->index, -1);
2218       else
2219         *path = NULL;
2220     }
2221
2222   if (cell != NULL && item != NULL && icon_view->priv->cell_area != NULL)
2223     *cell = gtk_cell_area_get_focus_cell (icon_view->priv->cell_area);
2224
2225   return (item != NULL);
2226 }
2227
2228 static gboolean
2229 gtk_icon_view_button_press (GtkWidget      *widget,
2230                             GdkEventButton *event)
2231 {
2232   GtkIconView *icon_view;
2233   GtkIconViewItem *item;
2234   gboolean dirty = FALSE;
2235   GtkCellRenderer *cell = NULL, *cursor_cell = NULL;
2236
2237   icon_view = GTK_ICON_VIEW (widget);
2238
2239   if (event->window != icon_view->priv->bin_window)
2240     return FALSE;
2241
2242   if (!gtk_widget_has_focus (widget))
2243     gtk_widget_grab_focus (widget);
2244
2245   if (event->button == GDK_BUTTON_PRIMARY && event->type == GDK_BUTTON_PRESS)
2246     {
2247       GdkModifierType extend_mod_mask;
2248       GdkModifierType modify_mod_mask;
2249
2250       extend_mod_mask =
2251         gtk_widget_get_modifier_mask (widget, GDK_MODIFIER_INTENT_EXTEND_SELECTION);
2252
2253       modify_mod_mask =
2254         gtk_widget_get_modifier_mask (widget, GDK_MODIFIER_INTENT_MODIFY_SELECTION);
2255
2256       item = _gtk_icon_view_get_item_at_coords (icon_view,
2257                                                event->x, event->y,
2258                                                FALSE,
2259                                                &cell);
2260
2261       /*
2262        * We consider only the the cells' area as the item area if the
2263        * item is not selected, but if it *is* selected, the complete
2264        * selection rectangle is considered to be part of the item.
2265        */
2266       if (item != NULL && (cell != NULL || item->selected))
2267         {
2268           if (cell != NULL)
2269             {
2270               if (gtk_cell_renderer_is_activatable (cell))
2271                 cursor_cell = cell;
2272             }
2273
2274           gtk_icon_view_scroll_to_item (icon_view, item);
2275
2276           if (icon_view->priv->selection_mode == GTK_SELECTION_NONE)
2277             {
2278               _gtk_icon_view_set_cursor_item (icon_view, item, cursor_cell);
2279             }
2280           else if (icon_view->priv->selection_mode == GTK_SELECTION_MULTIPLE &&
2281                    (event->state & extend_mod_mask))
2282             {
2283               gtk_icon_view_unselect_all_internal (icon_view);
2284
2285               _gtk_icon_view_set_cursor_item (icon_view, item, cursor_cell);
2286               if (!icon_view->priv->anchor_item)
2287                 icon_view->priv->anchor_item = item;
2288               else
2289                 gtk_icon_view_select_all_between (icon_view,
2290                                                   icon_view->priv->anchor_item,
2291                                                   item);
2292               dirty = TRUE;
2293             }
2294           else
2295             {
2296               if ((icon_view->priv->selection_mode == GTK_SELECTION_MULTIPLE ||
2297                   ((icon_view->priv->selection_mode == GTK_SELECTION_SINGLE) && item->selected)) &&
2298                   (event->state & modify_mod_mask))
2299                 {
2300                   item->selected = !item->selected;
2301                   gtk_icon_view_queue_draw_item (icon_view, item);
2302                   dirty = TRUE;
2303                 }
2304               else
2305                 {
2306                   gtk_icon_view_unselect_all_internal (icon_view);
2307
2308                   item->selected = TRUE;
2309                   gtk_icon_view_queue_draw_item (icon_view, item);
2310                   dirty = TRUE;
2311                 }
2312               _gtk_icon_view_set_cursor_item (icon_view, item, cursor_cell);
2313               icon_view->priv->anchor_item = item;
2314             }
2315
2316           /* Save press to possibly begin a drag */
2317           if (icon_view->priv->pressed_button < 0)
2318             {
2319               icon_view->priv->pressed_button = event->button;
2320               icon_view->priv->press_start_x = event->x;
2321               icon_view->priv->press_start_y = event->y;
2322             }
2323
2324           if (!icon_view->priv->last_single_clicked)
2325             icon_view->priv->last_single_clicked = item;
2326
2327           /* cancel the current editing, if it exists */
2328           gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
2329
2330           if (cell != NULL && gtk_cell_renderer_is_activatable (cell))
2331             {
2332               GtkCellAreaContext *context;
2333
2334               context = g_ptr_array_index (icon_view->priv->row_contexts, item->row);
2335
2336               _gtk_icon_view_set_cell_data (icon_view, item);
2337               gtk_cell_area_activate (icon_view->priv->cell_area, context,
2338                                       GTK_WIDGET (icon_view),
2339                                       &item->cell_area, 0/* XXX flags */, FALSE);
2340             }
2341         }
2342       else
2343         {
2344           if (icon_view->priv->selection_mode != GTK_SELECTION_BROWSE &&
2345               !(event->state & modify_mod_mask))
2346             {
2347               dirty = gtk_icon_view_unselect_all_internal (icon_view);
2348             }
2349
2350           if (icon_view->priv->selection_mode == GTK_SELECTION_MULTIPLE)
2351             gtk_icon_view_start_rubberbanding (icon_view, event->device, event->x, event->y);
2352         }
2353
2354       /* don't draw keyboard focus around an clicked-on item */
2355       icon_view->priv->draw_focus = FALSE;
2356     }
2357
2358   if (event->button == GDK_BUTTON_PRIMARY && event->type == GDK_2BUTTON_PRESS)
2359     {
2360       item = _gtk_icon_view_get_item_at_coords (icon_view,
2361                                                event->x, event->y,
2362                                                FALSE,
2363                                                NULL);
2364
2365       if (item && item == icon_view->priv->last_single_clicked)
2366         {
2367           GtkTreePath *path;
2368
2369           path = gtk_tree_path_new_from_indices (item->index, -1);
2370           gtk_icon_view_item_activated (icon_view, path);
2371           gtk_tree_path_free (path);
2372         }
2373
2374       icon_view->priv->last_single_clicked = NULL;
2375       icon_view->priv->pressed_button = -1;
2376     }
2377
2378   if (dirty)
2379     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
2380
2381   return event->button == GDK_BUTTON_PRIMARY;
2382 }
2383
2384 static gboolean
2385 gtk_icon_view_button_release (GtkWidget      *widget,
2386                               GdkEventButton *event)
2387 {
2388   GtkIconView *icon_view;
2389
2390   icon_view = GTK_ICON_VIEW (widget);
2391
2392   if (icon_view->priv->pressed_button == event->button)
2393     icon_view->priv->pressed_button = -1;
2394
2395   gtk_icon_view_stop_rubberbanding (icon_view);
2396
2397   remove_scroll_timeout (icon_view);
2398
2399   return TRUE;
2400 }
2401
2402 static gboolean
2403 gtk_icon_view_key_press (GtkWidget      *widget,
2404                          GdkEventKey    *event)
2405 {
2406   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
2407
2408   if (icon_view->priv->doing_rubberband)
2409     {
2410       if (event->keyval == GDK_KEY_Escape)
2411         gtk_icon_view_stop_rubberbanding (icon_view);
2412
2413       return TRUE;
2414     }
2415
2416   return GTK_WIDGET_CLASS (gtk_icon_view_parent_class)->key_press_event (widget, event);
2417 }
2418
2419 static gboolean
2420 gtk_icon_view_key_release (GtkWidget      *widget,
2421                            GdkEventKey    *event)
2422 {
2423   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
2424
2425   if (icon_view->priv->doing_rubberband)
2426     return TRUE;
2427
2428   return GTK_WIDGET_CLASS (gtk_icon_view_parent_class)->key_press_event (widget, event);
2429 }
2430
2431 static void
2432 gtk_icon_view_update_rubberband (gpointer data)
2433 {
2434   GtkIconView *icon_view;
2435   gint x, y;
2436   GdkRectangle old_area;
2437   GdkRectangle new_area;
2438   GdkRectangle common;
2439   cairo_region_t *invalid_region;
2440
2441   icon_view = GTK_ICON_VIEW (data);
2442
2443   gdk_window_get_device_position (icon_view->priv->bin_window,
2444                                   icon_view->priv->rubberband_device,
2445                                   &x, &y, NULL);
2446
2447   x = MAX (x, 0);
2448   y = MAX (y, 0);
2449
2450   old_area.x = MIN (icon_view->priv->rubberband_x1,
2451                     icon_view->priv->rubberband_x2);
2452   old_area.y = MIN (icon_view->priv->rubberband_y1,
2453                     icon_view->priv->rubberband_y2);
2454   old_area.width = ABS (icon_view->priv->rubberband_x2 -
2455                         icon_view->priv->rubberband_x1) + 1;
2456   old_area.height = ABS (icon_view->priv->rubberband_y2 -
2457                          icon_view->priv->rubberband_y1) + 1;
2458
2459   new_area.x = MIN (icon_view->priv->rubberband_x1, x);
2460   new_area.y = MIN (icon_view->priv->rubberband_y1, y);
2461   new_area.width = ABS (x - icon_view->priv->rubberband_x1) + 1;
2462   new_area.height = ABS (y - icon_view->priv->rubberband_y1) + 1;
2463
2464   invalid_region = cairo_region_create_rectangle (&old_area);
2465   cairo_region_union_rectangle (invalid_region, &new_area);
2466
2467   gdk_rectangle_intersect (&old_area, &new_area, &common);
2468   if (common.width > 2 && common.height > 2)
2469     {
2470       cairo_region_t *common_region;
2471
2472       /* make sure the border is invalidated */
2473       common.x += 1;
2474       common.y += 1;
2475       common.width -= 2;
2476       common.height -= 2;
2477
2478       common_region = cairo_region_create_rectangle (&common);
2479
2480       cairo_region_subtract (invalid_region, common_region);
2481       cairo_region_destroy (common_region);
2482     }
2483
2484   gdk_window_invalidate_region (icon_view->priv->bin_window, invalid_region, TRUE);
2485
2486   cairo_region_destroy (invalid_region);
2487
2488   icon_view->priv->rubberband_x2 = x;
2489   icon_view->priv->rubberband_y2 = y;
2490
2491   gtk_icon_view_update_rubberband_selection (icon_view);
2492 }
2493
2494 static void
2495 gtk_icon_view_start_rubberbanding (GtkIconView  *icon_view,
2496                                    GdkDevice    *device,
2497                                    gint          x,
2498                                    gint          y)
2499 {
2500   GList *items;
2501
2502   if (icon_view->priv->rubberband_device)
2503     return;
2504
2505   for (items = icon_view->priv->items; items; items = items->next)
2506     {
2507       GtkIconViewItem *item = items->data;
2508
2509       item->selected_before_rubberbanding = item->selected;
2510     }
2511
2512   icon_view->priv->rubberband_x1 = x;
2513   icon_view->priv->rubberband_y1 = y;
2514   icon_view->priv->rubberband_x2 = x;
2515   icon_view->priv->rubberband_y2 = y;
2516
2517   icon_view->priv->doing_rubberband = TRUE;
2518   icon_view->priv->rubberband_device = device;
2519
2520   gtk_device_grab_add (GTK_WIDGET (icon_view), device, TRUE);
2521 }
2522
2523 static void
2524 gtk_icon_view_stop_rubberbanding (GtkIconView *icon_view)
2525 {
2526   if (!icon_view->priv->doing_rubberband)
2527     return;
2528
2529   gtk_device_grab_remove (GTK_WIDGET (icon_view),
2530                           icon_view->priv->rubberband_device);
2531
2532   icon_view->priv->doing_rubberband = FALSE;
2533   icon_view->priv->rubberband_device = NULL;
2534
2535   gtk_widget_queue_draw (GTK_WIDGET (icon_view));
2536 }
2537
2538 static void
2539 gtk_icon_view_update_rubberband_selection (GtkIconView *icon_view)
2540 {
2541   GList *items;
2542   gint x, y, width, height;
2543   gboolean dirty = FALSE;
2544
2545   x = MIN (icon_view->priv->rubberband_x1,
2546            icon_view->priv->rubberband_x2);
2547   y = MIN (icon_view->priv->rubberband_y1,
2548            icon_view->priv->rubberband_y2);
2549   width = ABS (icon_view->priv->rubberband_x1 -
2550                icon_view->priv->rubberband_x2);
2551   height = ABS (icon_view->priv->rubberband_y1 -
2552                 icon_view->priv->rubberband_y2);
2553
2554   for (items = icon_view->priv->items; items; items = items->next)
2555     {
2556       GtkIconViewItem *item = items->data;
2557       gboolean is_in;
2558       gboolean selected;
2559
2560       is_in = gtk_icon_view_item_hit_test (icon_view, item,
2561                                            x, y, width, height);
2562
2563       selected = is_in ^ item->selected_before_rubberbanding;
2564
2565       if (item->selected != selected)
2566         {
2567           item->selected = selected;
2568           dirty = TRUE;
2569           gtk_icon_view_queue_draw_item (icon_view, item);
2570         }
2571     }
2572
2573   if (dirty)
2574     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
2575 }
2576
2577
2578 typedef struct {
2579   GdkRectangle hit_rect;
2580   gboolean     hit;
2581 } HitTestData;
2582
2583 static gboolean
2584 hit_test (GtkCellRenderer    *renderer,
2585           const GdkRectangle *cell_area,
2586           const GdkRectangle *cell_background,
2587           HitTestData        *data)
2588 {
2589   if (MIN (data->hit_rect.x + data->hit_rect.width, cell_area->x + cell_area->width) -
2590       MAX (data->hit_rect.x, cell_area->x) > 0 &&
2591       MIN (data->hit_rect.y + data->hit_rect.height, cell_area->y + cell_area->height) -
2592       MAX (data->hit_rect.y, cell_area->y) > 0)
2593     data->hit = TRUE;
2594
2595   return (data->hit != FALSE);
2596 }
2597
2598 static gboolean
2599 gtk_icon_view_item_hit_test (GtkIconView      *icon_view,
2600                              GtkIconViewItem  *item,
2601                              gint              x,
2602                              gint              y,
2603                              gint              width,
2604                              gint              height)
2605 {
2606   HitTestData data = { { x, y, width, height }, FALSE };
2607   GtkCellAreaContext *context;
2608   GdkRectangle *item_area = &item->cell_area;
2609
2610   if (MIN (x + width, item_area->x + item_area->width) - MAX (x, item_area->x) <= 0 ||
2611       MIN (y + height, item_area->y + item_area->height) - MAX (y, item_area->y) <= 0)
2612     return FALSE;
2613
2614   context = g_ptr_array_index (icon_view->priv->row_contexts, item->row);
2615
2616   _gtk_icon_view_set_cell_data (icon_view, item);
2617   gtk_cell_area_foreach_alloc (icon_view->priv->cell_area, context,
2618                                GTK_WIDGET (icon_view),
2619                                item_area, item_area,
2620                                (GtkCellAllocCallback)hit_test, &data);
2621
2622   return data.hit;
2623 }
2624
2625 static gboolean
2626 gtk_icon_view_unselect_all_internal (GtkIconView  *icon_view)
2627 {
2628   gboolean dirty = FALSE;
2629   GList *items;
2630
2631   if (icon_view->priv->selection_mode == GTK_SELECTION_NONE)
2632     return FALSE;
2633
2634   for (items = icon_view->priv->items; items; items = items->next)
2635     {
2636       GtkIconViewItem *item = items->data;
2637
2638       if (item->selected)
2639         {
2640           item->selected = FALSE;
2641           dirty = TRUE;
2642           gtk_icon_view_queue_draw_item (icon_view, item);
2643           gtk_icon_view_item_selected_changed (icon_view, item);
2644         }
2645     }
2646
2647   return dirty;
2648 }
2649
2650
2651 /* GtkIconView signals */
2652 static void
2653 gtk_icon_view_real_select_all (GtkIconView *icon_view)
2654 {
2655   gtk_icon_view_select_all (icon_view);
2656 }
2657
2658 static void
2659 gtk_icon_view_real_unselect_all (GtkIconView *icon_view)
2660 {
2661   gtk_icon_view_unselect_all (icon_view);
2662 }
2663
2664 static void
2665 gtk_icon_view_real_select_cursor_item (GtkIconView *icon_view)
2666 {
2667   gtk_icon_view_unselect_all (icon_view);
2668
2669   if (icon_view->priv->cursor_item != NULL)
2670     _gtk_icon_view_select_item (icon_view, icon_view->priv->cursor_item);
2671 }
2672
2673 static gboolean
2674 gtk_icon_view_real_activate_cursor_item (GtkIconView *icon_view)
2675 {
2676   GtkTreePath *path;
2677   GtkCellAreaContext *context;
2678
2679   if (!icon_view->priv->cursor_item)
2680     return FALSE;
2681
2682   context = g_ptr_array_index (icon_view->priv->row_contexts, icon_view->priv->cursor_item->row);
2683
2684   _gtk_icon_view_set_cell_data (icon_view, icon_view->priv->cursor_item);
2685   gtk_cell_area_activate (icon_view->priv->cell_area, context,
2686                           GTK_WIDGET (icon_view),
2687                           &icon_view->priv->cursor_item->cell_area,
2688                           0 /* XXX flags */,
2689                           FALSE);
2690
2691   path = gtk_tree_path_new_from_indices (icon_view->priv->cursor_item->index, -1);
2692   gtk_icon_view_item_activated (icon_view, path);
2693   gtk_tree_path_free (path);
2694
2695   return TRUE;
2696 }
2697
2698 static void
2699 gtk_icon_view_real_toggle_cursor_item (GtkIconView *icon_view)
2700 {
2701   if (!icon_view->priv->cursor_item)
2702     return;
2703
2704   switch (icon_view->priv->selection_mode)
2705     {
2706     case GTK_SELECTION_NONE:
2707       break;
2708     case GTK_SELECTION_BROWSE:
2709       _gtk_icon_view_select_item (icon_view, icon_view->priv->cursor_item);
2710       break;
2711     case GTK_SELECTION_SINGLE:
2712       if (icon_view->priv->cursor_item->selected)
2713         _gtk_icon_view_unselect_item (icon_view, icon_view->priv->cursor_item);
2714       else
2715         _gtk_icon_view_select_item (icon_view, icon_view->priv->cursor_item);
2716       break;
2717     case GTK_SELECTION_MULTIPLE:
2718       icon_view->priv->cursor_item->selected = !icon_view->priv->cursor_item->selected;
2719       g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
2720
2721       gtk_icon_view_item_selected_changed (icon_view, icon_view->priv->cursor_item);
2722       gtk_icon_view_queue_draw_item (icon_view, icon_view->priv->cursor_item);
2723       break;
2724     }
2725 }
2726
2727 static void
2728 gtk_icon_view_set_hadjustment_values (GtkIconView *icon_view)
2729 {
2730   GtkAllocation  allocation;
2731   GtkAdjustment *adj = icon_view->priv->hadjustment;
2732   gdouble old_page_size;
2733   gdouble old_upper;
2734   gdouble old_value;
2735   gdouble new_value;
2736   gdouble new_upper;
2737
2738   gtk_widget_get_allocation (GTK_WIDGET (icon_view), &allocation);
2739
2740   old_value = gtk_adjustment_get_value (adj);
2741   old_upper = gtk_adjustment_get_upper (adj);
2742   old_page_size = gtk_adjustment_get_page_size (adj);
2743   new_upper = MAX (allocation.width, icon_view->priv->width);
2744
2745   if (gtk_widget_get_direction (GTK_WIDGET (icon_view)) == GTK_TEXT_DIR_RTL)
2746     {
2747       /* Make sure no scrolling occurs for RTL locales also (if possible) */
2748       /* Quick explanation:
2749        *   In LTR locales, leftmost portion of visible rectangle should stay
2750        *   fixed, which means left edge of scrollbar thumb should remain fixed
2751        *   and thus adjustment's value should stay the same.
2752        *
2753        *   In RTL locales, we want to keep rightmost portion of visible
2754        *   rectangle fixed. This means right edge of thumb should remain fixed.
2755        *   In this case, upper - value - page_size should remain constant.
2756        */
2757       new_value = (new_upper - allocation.width) -
2758                   (old_upper - old_value - old_page_size);
2759       new_value = CLAMP (new_value, 0, new_upper - allocation.width);
2760     }
2761   else
2762     new_value = CLAMP (old_value, 0, new_upper - allocation.width);
2763
2764   gtk_adjustment_configure (adj,
2765                             new_value,
2766                             0.0,
2767                             new_upper,
2768                             allocation.width * 0.1,
2769                             allocation.width * 0.9,
2770                             allocation.width);
2771 }
2772
2773 static void
2774 gtk_icon_view_set_vadjustment_values (GtkIconView *icon_view)
2775 {
2776   GtkAllocation  allocation;
2777   GtkAdjustment *adj = icon_view->priv->vadjustment;
2778
2779   gtk_widget_get_allocation (GTK_WIDGET (icon_view), &allocation);
2780
2781   gtk_adjustment_configure (adj,
2782                             gtk_adjustment_get_value (adj),
2783                             0.0,
2784                             MAX (allocation.height, icon_view->priv->height),
2785                             allocation.height * 0.1,
2786                             allocation.height * 0.9,
2787                             allocation.height);
2788 }
2789
2790 static void
2791 gtk_icon_view_set_hadjustment (GtkIconView   *icon_view,
2792                                GtkAdjustment *adjustment)
2793 {
2794   GtkIconViewPrivate *priv = icon_view->priv;
2795
2796   if (adjustment && priv->hadjustment == adjustment)
2797     return;
2798
2799   if (priv->hadjustment != NULL)
2800     {
2801       g_signal_handlers_disconnect_matched (priv->hadjustment,
2802                                             G_SIGNAL_MATCH_DATA,
2803                                             0, 0, NULL, NULL, icon_view);
2804       g_object_unref (priv->hadjustment);
2805     }
2806
2807   if (!adjustment)
2808     adjustment = gtk_adjustment_new (0.0, 0.0, 0.0,
2809                                      0.0, 0.0, 0.0);
2810
2811   g_signal_connect (adjustment, "value-changed",
2812                     G_CALLBACK (gtk_icon_view_adjustment_changed), icon_view);
2813   priv->hadjustment = g_object_ref_sink (adjustment);
2814   gtk_icon_view_set_hadjustment_values (icon_view);
2815
2816   g_object_notify (G_OBJECT (icon_view), "hadjustment");
2817 }
2818
2819 static void
2820 gtk_icon_view_set_vadjustment (GtkIconView   *icon_view,
2821                                GtkAdjustment *adjustment)
2822 {
2823   GtkIconViewPrivate *priv = icon_view->priv;
2824
2825   if (adjustment && priv->vadjustment == adjustment)
2826     return;
2827
2828   if (priv->vadjustment != NULL)
2829     {
2830       g_signal_handlers_disconnect_matched (priv->vadjustment,
2831                                             G_SIGNAL_MATCH_DATA,
2832                                             0, 0, NULL, NULL, icon_view);
2833       g_object_unref (priv->vadjustment);
2834     }
2835
2836   if (!adjustment)
2837     adjustment = gtk_adjustment_new (0.0, 0.0, 0.0,
2838                                      0.0, 0.0, 0.0);
2839
2840   g_signal_connect (adjustment, "value-changed",
2841                     G_CALLBACK (gtk_icon_view_adjustment_changed), icon_view);
2842   priv->vadjustment = g_object_ref_sink (adjustment);
2843   gtk_icon_view_set_vadjustment_values (icon_view);
2844
2845   g_object_notify (G_OBJECT (icon_view), "vadjustment");
2846 }
2847
2848 static void
2849 gtk_icon_view_adjustment_changed (GtkAdjustment *adjustment,
2850                                   GtkIconView   *icon_view)
2851 {
2852   GtkIconViewPrivate *priv = icon_view->priv;
2853
2854   if (gtk_widget_get_realized (GTK_WIDGET (icon_view)))
2855     {
2856       gdk_window_move (priv->bin_window,
2857                        - gtk_adjustment_get_value (priv->hadjustment),
2858                        - gtk_adjustment_get_value (priv->vadjustment));
2859
2860       if (icon_view->priv->doing_rubberband)
2861         gtk_icon_view_update_rubberband (GTK_WIDGET (icon_view));
2862
2863       _gtk_icon_view_accessible_adjustment_changed (icon_view);
2864     }
2865 }
2866
2867 static gint
2868 compare_sizes (gconstpointer p1,
2869                gconstpointer p2,
2870                gpointer      unused)
2871 {
2872   return GPOINTER_TO_INT (((const GtkRequestedSize *) p1)->data)
2873        - GPOINTER_TO_INT (((const GtkRequestedSize *) p2)->data);
2874 }
2875
2876 static void
2877 gtk_icon_view_layout (GtkIconView *icon_view)
2878 {
2879   GtkIconViewPrivate *priv = icon_view->priv;
2880   GtkWidget *widget = GTK_WIDGET (icon_view);
2881   GList *items;
2882   gint item_width; /* this doesn't include item_padding */
2883   gint n_columns, n_rows, n_items;
2884   gint col, row;
2885   GtkRequestedSize *sizes;
2886   gboolean rtl;
2887
2888   if (gtk_icon_view_is_empty (icon_view))
2889     return;
2890
2891   rtl = gtk_widget_get_direction (GTK_WIDGET (icon_view)) == GTK_TEXT_DIR_RTL;
2892   n_items = gtk_icon_view_get_n_items (icon_view);
2893
2894   gtk_icon_view_compute_n_items_for_size (icon_view,
2895                                           GTK_ORIENTATION_HORIZONTAL,
2896                                           gtk_widget_get_allocated_width (widget),
2897                                           NULL, NULL,
2898                                           &n_columns, &item_width);
2899   n_rows = (n_items + n_columns - 1) / n_columns;
2900
2901   priv->width = n_columns * (item_width + 2 * priv->item_padding + priv->column_spacing) - priv->column_spacing;
2902   priv->width += 2 * priv->margin;
2903   priv->width = MAX (priv->width, gtk_widget_get_allocated_width (widget));
2904
2905   /* Clear the per row contexts */
2906   g_ptr_array_set_size (icon_view->priv->row_contexts, 0);
2907
2908   gtk_cell_area_context_reset (priv->cell_area_context);
2909   /* because layouting is complicated. We designed an API
2910    * that is O(N²) and nonsensical.
2911    * And we're proud of it. */
2912   for (items = priv->items; items; items = items->next)
2913     {
2914       _gtk_icon_view_set_cell_data (icon_view, items->data);
2915       gtk_cell_area_get_preferred_width (priv->cell_area,
2916                                          priv->cell_area_context,
2917                                          widget,
2918                                          NULL, NULL);
2919     }
2920
2921   sizes = g_newa (GtkRequestedSize, n_rows);
2922   items = priv->items;
2923   priv->height = priv->margin;
2924
2925   /* Collect the heights for all rows */
2926   for (row = 0; row < n_rows; row++)
2927     {
2928       GtkCellAreaContext *context = gtk_cell_area_copy_context (priv->cell_area, priv->cell_area_context);
2929       g_ptr_array_add (priv->row_contexts, context);
2930
2931       for (col = 0; col < n_columns && items; col++, items = items->next)
2932         {
2933           GtkIconViewItem *item = items->data;
2934
2935           _gtk_icon_view_set_cell_data (icon_view, item);
2936           gtk_cell_area_get_preferred_height_for_width (priv->cell_area,
2937                                                         context,
2938                                                         widget,
2939                                                         item_width,
2940                                                         NULL, NULL);
2941         }
2942
2943       sizes[row].data = GINT_TO_POINTER (row);
2944       gtk_cell_area_context_get_preferred_height_for_width (context,
2945                                                             item_width,
2946                                                             &sizes[row].minimum_size,
2947                                                             &sizes[row].natural_size);
2948       priv->height += sizes[row].minimum_size + 2 * priv->item_padding + priv->row_spacing;
2949     }
2950
2951   priv->height -= priv->row_spacing;
2952   priv->height += priv->margin;
2953   priv->height = MIN (priv->height, gtk_widget_get_allocated_height (widget));
2954
2955   gtk_distribute_natural_allocation (gtk_widget_get_allocated_height (widget) - priv->height,
2956                                      n_rows,
2957                                      sizes);
2958
2959   /* Actually allocate the rows */
2960   g_qsort_with_data (sizes, n_rows, sizeof (GtkRequestedSize), compare_sizes, NULL);
2961
2962   items = priv->items;
2963   priv->height = priv->margin;
2964
2965   for (row = 0; row < n_rows; row++)
2966     {
2967       GtkCellAreaContext *context = g_ptr_array_index (priv->row_contexts, row);
2968       gtk_cell_area_context_allocate (context, item_width, sizes[row].minimum_size);
2969
2970       priv->height += priv->item_padding;
2971
2972       for (col = 0; col < n_columns && items; col++, items = items->next)
2973         {
2974           GtkIconViewItem *item = items->data;
2975
2976           item->cell_area.x = priv->margin + (col * 2 + 1) * priv->item_padding + col * (priv->column_spacing + item_width);
2977           item->cell_area.width = item_width;
2978           item->cell_area.y = priv->height;
2979           item->cell_area.height = sizes[row].minimum_size;
2980           item->row = row;
2981           item->col = col;
2982           if (rtl)
2983             {
2984               item->cell_area.x = priv->width - item_width - item->cell_area.x;
2985               item->col = n_columns - 1 - col;
2986             }
2987         }
2988
2989       priv->height += sizes[row].minimum_size + priv->item_padding + priv->row_spacing;
2990     }
2991
2992   priv->height -= priv->row_spacing;
2993   priv->height += priv->margin;
2994   priv->height = MAX (priv->height, gtk_widget_get_allocated_height (widget));
2995 }
2996
2997 static void
2998 gtk_icon_view_invalidate_sizes (GtkIconView *icon_view)
2999 {
3000   /* Clear all item sizes */
3001   g_list_foreach (icon_view->priv->items,
3002                   (GFunc)gtk_icon_view_item_invalidate_size, NULL);
3003
3004   /* Re-layout the items */
3005   gtk_widget_queue_resize (GTK_WIDGET (icon_view));
3006 }
3007
3008 static void
3009 gtk_icon_view_item_invalidate_size (GtkIconViewItem *item)
3010 {
3011   item->cell_area.width = -1;
3012   item->cell_area.height = -1;
3013 }
3014
3015 static void
3016 gtk_icon_view_paint_item (GtkIconView     *icon_view,
3017                           cairo_t         *cr,
3018                           GtkIconViewItem *item,
3019                           gint             x,
3020                           gint             y,
3021                           gboolean         draw_focus)
3022 {
3023   GdkRectangle cell_area;
3024   GtkStateFlags state = 0;
3025   GtkCellRendererState flags = 0;
3026   GtkStyleContext *style_context;
3027   GtkWidget *widget = GTK_WIDGET (icon_view);
3028   GtkIconViewPrivate *priv = icon_view->priv;
3029   GtkCellAreaContext *context;
3030
3031   if (priv->model == NULL || item->cell_area.width <= 0 || item->cell_area.height <= 0)
3032     return;
3033
3034   _gtk_icon_view_set_cell_data (icon_view, item);
3035
3036   style_context = gtk_widget_get_style_context (widget);
3037   state = gtk_widget_get_state_flags (widget);
3038
3039   gtk_style_context_save (style_context);
3040   gtk_style_context_add_class (style_context, GTK_STYLE_CLASS_VIEW);
3041   gtk_style_context_add_class (style_context, GTK_STYLE_CLASS_CELL);
3042
3043   state &= ~(GTK_STATE_FLAG_SELECTED | GTK_STATE_FLAG_PRELIGHT);
3044
3045   if (item->selected)
3046     {
3047       if ((state & GTK_STATE_FLAG_FOCUSED) &&
3048           item == icon_view->priv->cursor_item)
3049         {
3050           flags |= GTK_CELL_RENDERER_FOCUSED;
3051         }
3052
3053       state |= GTK_STATE_FLAG_SELECTED;
3054       flags |= GTK_CELL_RENDERER_SELECTED;
3055     }
3056
3057   if (item->prelight)
3058     {
3059       state |= GTK_STATE_FLAG_PRELIGHT;
3060       flags |= GTK_CELL_RENDERER_PRELIT;
3061     }
3062
3063   gtk_style_context_set_state (style_context, state);
3064
3065   if (item->selected)
3066     {
3067       gtk_render_background (style_context, cr,
3068                              x - icon_view->priv->item_padding,
3069                              y - icon_view->priv->item_padding,
3070                              item->cell_area.width  + icon_view->priv->item_padding * 2,
3071                              item->cell_area.height + icon_view->priv->item_padding * 2);
3072       gtk_render_frame (style_context, cr,
3073                         x - icon_view->priv->item_padding,
3074                         y - icon_view->priv->item_padding,
3075                         item->cell_area.width  + icon_view->priv->item_padding * 2,
3076                         item->cell_area.height + icon_view->priv->item_padding * 2);
3077     }
3078
3079   cell_area.x      = x;
3080   cell_area.y      = y;
3081   cell_area.width  = item->cell_area.width;
3082   cell_area.height = item->cell_area.height;
3083
3084   context = g_ptr_array_index (priv->row_contexts, item->row);
3085   gtk_cell_area_render (priv->cell_area, context,
3086                         widget, cr, &cell_area, &cell_area, flags,
3087                         draw_focus);
3088
3089   gtk_style_context_restore (style_context);
3090 }
3091
3092 static void
3093 gtk_icon_view_paint_rubberband (GtkIconView     *icon_view,
3094                                 cairo_t         *cr)
3095 {
3096   GtkStyleContext *context;
3097   GdkRectangle rect;
3098
3099   cairo_save (cr);
3100
3101   rect.x = MIN (icon_view->priv->rubberband_x1, icon_view->priv->rubberband_x2);
3102   rect.y = MIN (icon_view->priv->rubberband_y1, icon_view->priv->rubberband_y2);
3103   rect.width = ABS (icon_view->priv->rubberband_x1 - icon_view->priv->rubberband_x2) + 1;
3104   rect.height = ABS (icon_view->priv->rubberband_y1 - icon_view->priv->rubberband_y2) + 1;
3105
3106   context = gtk_widget_get_style_context (GTK_WIDGET (icon_view));
3107
3108   gtk_style_context_save (context);
3109   gtk_style_context_add_class (context, GTK_STYLE_CLASS_RUBBERBAND);
3110
3111   gdk_cairo_rectangle (cr, &rect);
3112   cairo_clip (cr);
3113
3114   gtk_render_background (context, cr,
3115                          rect.x, rect.y,
3116                          rect.width, rect.height);
3117   gtk_render_frame (context, cr,
3118                     rect.x, rect.y,
3119                     rect.width, rect.height);
3120
3121   gtk_style_context_restore (context);
3122   cairo_restore (cr);
3123 }
3124
3125 static void
3126 gtk_icon_view_queue_draw_path (GtkIconView *icon_view,
3127                                GtkTreePath *path)
3128 {
3129   GList *l;
3130   gint index;
3131
3132   index = gtk_tree_path_get_indices (path)[0];
3133
3134   for (l = icon_view->priv->items; l; l = l->next)
3135     {
3136       GtkIconViewItem *item = l->data;
3137
3138       if (item->index == index)
3139         {
3140           gtk_icon_view_queue_draw_item (icon_view, item);
3141           break;
3142         }
3143     }
3144 }
3145
3146 static void
3147 gtk_icon_view_queue_draw_item (GtkIconView     *icon_view,
3148                                GtkIconViewItem *item)
3149 {
3150   GdkRectangle  rect;
3151   GdkRectangle *item_area = &item->cell_area;
3152
3153   rect.x      = item_area->x - icon_view->priv->item_padding;
3154   rect.y      = item_area->y - icon_view->priv->item_padding;
3155   rect.width  = item_area->width  + icon_view->priv->item_padding * 2;
3156   rect.height = item_area->height + icon_view->priv->item_padding * 2;
3157
3158   if (icon_view->priv->bin_window)
3159     gdk_window_invalidate_rect (icon_view->priv->bin_window, &rect, TRUE);
3160 }
3161
3162 void
3163 _gtk_icon_view_set_cursor_item (GtkIconView     *icon_view,
3164                                 GtkIconViewItem *item,
3165                                 GtkCellRenderer *cursor_cell)
3166 {
3167   AtkObject *obj;
3168   AtkObject *item_obj;
3169   AtkObject *cursor_item_obj;
3170
3171   /* When hitting this path from keynav, the focus cell is
3172    * already set, we dont need to notify the atk object
3173    * but we still need to queue the draw here (in the case
3174    * that the focus cell changes but not the cursor item).
3175    */
3176   gtk_icon_view_queue_draw_item (icon_view, item);
3177
3178   if (icon_view->priv->cursor_item == item &&
3179       (cursor_cell == NULL || cursor_cell == gtk_cell_area_get_focus_cell (icon_view->priv->cell_area)))
3180     return;
3181
3182   obj = gtk_widget_get_accessible (GTK_WIDGET (icon_view));
3183   if (icon_view->priv->cursor_item != NULL)
3184     {
3185       gtk_icon_view_queue_draw_item (icon_view, icon_view->priv->cursor_item);
3186       if (obj != NULL)
3187         {
3188           cursor_item_obj = atk_object_ref_accessible_child (obj, icon_view->priv->cursor_item->index);
3189           if (cursor_item_obj != NULL)
3190             atk_object_notify_state_change (cursor_item_obj, ATK_STATE_FOCUSED, FALSE);
3191         }
3192     }
3193   icon_view->priv->cursor_item = item;
3194
3195   if (cursor_cell)
3196     gtk_cell_area_set_focus_cell (icon_view->priv->cell_area, cursor_cell);
3197   else
3198     {
3199       /* Make sure there is a cell in focus initially */
3200       if (!gtk_cell_area_get_focus_cell (icon_view->priv->cell_area))
3201         gtk_cell_area_focus (icon_view->priv->cell_area, GTK_DIR_TAB_FORWARD);
3202     }
3203
3204   /* Notify that accessible focus object has changed */
3205   item_obj = atk_object_ref_accessible_child (obj, item->index);
3206
3207   if (item_obj != NULL)
3208     {
3209       atk_focus_tracker_notify (item_obj);
3210       atk_object_notify_state_change (item_obj, ATK_STATE_FOCUSED, TRUE);
3211       g_object_unref (item_obj);
3212     }
3213 }
3214
3215
3216 static GtkIconViewItem *
3217 gtk_icon_view_item_new (void)
3218 {
3219   GtkIconViewItem *item;
3220
3221   item = g_slice_new0 (GtkIconViewItem);
3222
3223   item->cell_area.width  = -1;
3224   item->cell_area.height = -1;
3225
3226   return item;
3227 }
3228
3229 static void
3230 gtk_icon_view_item_free (GtkIconViewItem *item)
3231 {
3232   g_return_if_fail (item != NULL);
3233
3234   g_slice_free (GtkIconViewItem, item);
3235 }
3236
3237 GtkIconViewItem *
3238 _gtk_icon_view_get_item_at_coords (GtkIconView          *icon_view,
3239                                    gint                  x,
3240                                    gint                  y,
3241                                    gboolean              only_in_cell,
3242                                    GtkCellRenderer     **cell_at_pos)
3243 {
3244   GList *items;
3245
3246   if (cell_at_pos)
3247     *cell_at_pos = NULL;
3248
3249   for (items = icon_view->priv->items; items; items = items->next)
3250     {
3251       GtkIconViewItem *item = items->data;
3252       GdkRectangle    *item_area = &item->cell_area;
3253
3254       if (x >= item_area->x - icon_view->priv->column_spacing/2 &&
3255           x <= item_area->x + item_area->width + icon_view->priv->column_spacing/2 &&
3256           y >= item_area->y - icon_view->priv->row_spacing/2 &&
3257           y <= item_area->y + item_area->height + icon_view->priv->row_spacing/2)
3258         {
3259           if (only_in_cell || cell_at_pos)
3260             {
3261               GtkCellRenderer *cell = NULL;
3262               GtkCellAreaContext *context;
3263
3264               context = g_ptr_array_index (icon_view->priv->row_contexts, item->row);
3265               _gtk_icon_view_set_cell_data (icon_view, item);
3266
3267               if (x >= item_area->x && x <= item_area->x + item_area->width &&
3268                   y >= item_area->y && y <= item_area->y + item_area->height)
3269                 cell = gtk_cell_area_get_cell_at_position (icon_view->priv->cell_area, context,
3270                                                            GTK_WIDGET (icon_view),
3271                                                            item_area,
3272                                                            x, y, NULL);
3273
3274               if (cell_at_pos)
3275                 *cell_at_pos = cell;
3276
3277               if (only_in_cell)
3278                 return cell != NULL ? item : NULL;
3279               else
3280                 return item;
3281             }
3282           return item;
3283         }
3284     }
3285   return NULL;
3286 }
3287
3288 void
3289 _gtk_icon_view_select_item (GtkIconView      *icon_view,
3290                             GtkIconViewItem  *item)
3291 {
3292   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
3293   g_return_if_fail (item != NULL);
3294
3295   if (item->selected)
3296     return;
3297
3298   if (icon_view->priv->selection_mode == GTK_SELECTION_NONE)
3299     return;
3300   else if (icon_view->priv->selection_mode != GTK_SELECTION_MULTIPLE)
3301     gtk_icon_view_unselect_all_internal (icon_view);
3302
3303   item->selected = TRUE;
3304
3305   gtk_icon_view_item_selected_changed (icon_view, item);
3306   g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
3307
3308   gtk_icon_view_queue_draw_item (icon_view, item);
3309 }
3310
3311
3312 void
3313 _gtk_icon_view_unselect_item (GtkIconView      *icon_view,
3314                               GtkIconViewItem  *item)
3315 {
3316   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
3317   g_return_if_fail (item != NULL);
3318
3319   if (!item->selected)
3320     return;
3321
3322   if (icon_view->priv->selection_mode == GTK_SELECTION_NONE ||
3323       icon_view->priv->selection_mode == GTK_SELECTION_BROWSE)
3324     return;
3325
3326   item->selected = FALSE;
3327
3328   gtk_icon_view_item_selected_changed (icon_view, item);
3329   g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
3330
3331   gtk_icon_view_queue_draw_item (icon_view, item);
3332 }
3333
3334 static void
3335 verify_items (GtkIconView *icon_view)
3336 {
3337   GList *items;
3338   int i = 0;
3339
3340   for (items = icon_view->priv->items; items; items = items->next)
3341     {
3342       GtkIconViewItem *item = items->data;
3343
3344       if (item->index != i)
3345         g_error ("List item does not match its index: "
3346                  "item index %d and list index %d\n", item->index, i);
3347
3348       i++;
3349     }
3350 }
3351
3352 static void
3353 gtk_icon_view_row_changed (GtkTreeModel *model,
3354                            GtkTreePath  *path,
3355                            GtkTreeIter  *iter,
3356                            gpointer      data)
3357 {
3358   GtkIconView *icon_view = GTK_ICON_VIEW (data);
3359
3360   /* ignore changes in branches */
3361   if (gtk_tree_path_get_depth (path) > 1)
3362     return;
3363
3364   /* An icon view subclass might add it's own model and populate
3365    * things at init() time instead of waiting for the constructor()
3366    * to be called
3367    */
3368   if (icon_view->priv->cell_area)
3369     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
3370
3371   /* Here we can use a "grow-only" strategy for optimization
3372    * and only invalidate a single item and queue a relayout
3373    * instead of invalidating the whole thing.
3374    *
3375    * For now GtkIconView still cant deal with huge models
3376    * so just invalidate the whole thing when the model
3377    * changes.
3378    */
3379   gtk_icon_view_invalidate_sizes (icon_view);
3380
3381   verify_items (icon_view);
3382 }
3383
3384 static void
3385 gtk_icon_view_row_inserted (GtkTreeModel *model,
3386                             GtkTreePath  *path,
3387                             GtkTreeIter  *iter,
3388                             gpointer      data)
3389 {
3390   GtkIconView *icon_view = GTK_ICON_VIEW (data);
3391   gint index;
3392   GtkIconViewItem *item;
3393   GList *list;
3394
3395   /* ignore changes in branches */
3396   if (gtk_tree_path_get_depth (path) > 1)
3397     return;
3398
3399   index = gtk_tree_path_get_indices(path)[0];
3400
3401   item = gtk_icon_view_item_new ();
3402
3403   item->index = index;
3404
3405   /* FIXME: We can be more efficient here,
3406      we can store a tail pointer and use that when
3407      appending (which is a rather common operation)
3408   */
3409   icon_view->priv->items = g_list_insert (icon_view->priv->items,
3410                                          item, index);
3411
3412   list = g_list_nth (icon_view->priv->items, index + 1);
3413   for (; list; list = list->next)
3414     {
3415       item = list->data;
3416
3417       item->index++;
3418     }
3419
3420   verify_items (icon_view);
3421
3422   gtk_widget_queue_resize (GTK_WIDGET (icon_view));
3423 }
3424
3425 static void
3426 gtk_icon_view_row_deleted (GtkTreeModel *model,
3427                            GtkTreePath  *path,
3428                            gpointer      data)
3429 {
3430   GtkIconView *icon_view = GTK_ICON_VIEW (data);
3431   gint index;
3432   GtkIconViewItem *item;
3433   GList *list, *next;
3434   gboolean emit = FALSE;
3435
3436   /* ignore changes in branches */
3437   if (gtk_tree_path_get_depth (path) > 1)
3438     return;
3439
3440   index = gtk_tree_path_get_indices(path)[0];
3441
3442   list = g_list_nth (icon_view->priv->items, index);
3443   item = list->data;
3444
3445   if (icon_view->priv->cell_area)
3446     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
3447
3448   if (item == icon_view->priv->anchor_item)
3449     icon_view->priv->anchor_item = NULL;
3450
3451   if (item == icon_view->priv->cursor_item)
3452     icon_view->priv->cursor_item = NULL;
3453
3454   if (item == icon_view->priv->last_prelight)
3455     icon_view->priv->last_prelight = NULL;
3456
3457   if (item->selected)
3458     emit = TRUE;
3459
3460   gtk_icon_view_item_free (item);
3461
3462   for (next = list->next; next; next = next->next)
3463     {
3464       item = next->data;
3465
3466       item->index--;
3467     }
3468
3469   icon_view->priv->items = g_list_delete_link (icon_view->priv->items, list);
3470
3471   verify_items (icon_view);
3472
3473   gtk_widget_queue_resize (GTK_WIDGET (icon_view));
3474
3475   if (emit)
3476     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
3477 }
3478
3479 static void
3480 gtk_icon_view_rows_reordered (GtkTreeModel *model,
3481                               GtkTreePath  *parent,
3482                               GtkTreeIter  *iter,
3483                               gint         *new_order,
3484                               gpointer      data)
3485 {
3486   GtkIconView *icon_view = GTK_ICON_VIEW (data);
3487   int i;
3488   int length;
3489   GList *items = NULL, *list;
3490   GtkIconViewItem **item_array;
3491   gint *order;
3492
3493   /* ignore changes in branches */
3494   if (iter != NULL)
3495     return;
3496
3497   if (icon_view->priv->cell_area)
3498     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
3499
3500   length = gtk_tree_model_iter_n_children (model, NULL);
3501
3502   order = g_new (gint, length);
3503   for (i = 0; i < length; i++)
3504     order [new_order[i]] = i;
3505
3506   item_array = g_new (GtkIconViewItem *, length);
3507   for (i = 0, list = icon_view->priv->items; list != NULL; list = list->next, i++)
3508     item_array[order[i]] = list->data;
3509   g_free (order);
3510
3511   for (i = length - 1; i >= 0; i--)
3512     {
3513       item_array[i]->index = i;
3514       items = g_list_prepend (items, item_array[i]);
3515     }
3516
3517   g_free (item_array);
3518   g_list_free (icon_view->priv->items);
3519   icon_view->priv->items = items;
3520
3521   gtk_widget_queue_resize (GTK_WIDGET (icon_view));
3522
3523   verify_items (icon_view);
3524 }
3525
3526 static void
3527 gtk_icon_view_build_items (GtkIconView *icon_view)
3528 {
3529   GtkTreeIter iter;
3530   int i;
3531   GList *items = NULL;
3532
3533   if (!gtk_tree_model_get_iter_first (icon_view->priv->model,
3534                                       &iter))
3535     return;
3536
3537   i = 0;
3538
3539   do
3540     {
3541       GtkIconViewItem *item = gtk_icon_view_item_new ();
3542
3543       item->index = i;
3544
3545       i++;
3546
3547       items = g_list_prepend (items, item);
3548
3549     } while (gtk_tree_model_iter_next (icon_view->priv->model, &iter));
3550
3551   icon_view->priv->items = g_list_reverse (items);
3552 }
3553
3554 static void
3555 gtk_icon_view_add_move_binding (GtkBindingSet  *binding_set,
3556                                 guint           keyval,
3557                                 guint           modmask,
3558                                 GtkMovementStep step,
3559                                 gint            count)
3560 {
3561
3562   gtk_binding_entry_add_signal (binding_set, keyval, modmask,
3563                                 I_("move-cursor"), 2,
3564                                 G_TYPE_ENUM, step,
3565                                 G_TYPE_INT, count);
3566
3567   gtk_binding_entry_add_signal (binding_set, keyval, GDK_SHIFT_MASK,
3568                                 "move-cursor", 2,
3569                                 G_TYPE_ENUM, step,
3570                                 G_TYPE_INT, count);
3571
3572   if ((modmask & GDK_CONTROL_MASK) == GDK_CONTROL_MASK)
3573    return;
3574
3575   gtk_binding_entry_add_signal (binding_set, keyval, GDK_CONTROL_MASK | GDK_SHIFT_MASK,
3576                                 "move-cursor", 2,
3577                                 G_TYPE_ENUM, step,
3578                                 G_TYPE_INT, count);
3579
3580   gtk_binding_entry_add_signal (binding_set, keyval, GDK_CONTROL_MASK,
3581                                 "move-cursor", 2,
3582                                 G_TYPE_ENUM, step,
3583                                 G_TYPE_INT, count);
3584 }
3585
3586 static gboolean
3587 gtk_icon_view_real_move_cursor (GtkIconView     *icon_view,
3588                                 GtkMovementStep  step,
3589                                 gint             count)
3590 {
3591   GdkModifierType state;
3592
3593   g_return_val_if_fail (GTK_ICON_VIEW (icon_view), FALSE);
3594   g_return_val_if_fail (step == GTK_MOVEMENT_LOGICAL_POSITIONS ||
3595                         step == GTK_MOVEMENT_VISUAL_POSITIONS ||
3596                         step == GTK_MOVEMENT_DISPLAY_LINES ||
3597                         step == GTK_MOVEMENT_PAGES ||
3598                         step == GTK_MOVEMENT_BUFFER_ENDS, FALSE);
3599
3600   if (!gtk_widget_has_focus (GTK_WIDGET (icon_view)))
3601     return FALSE;
3602
3603   gtk_cell_area_stop_editing (icon_view->priv->cell_area, FALSE);
3604   gtk_widget_grab_focus (GTK_WIDGET (icon_view));
3605
3606   if (gtk_get_current_event_state (&state))
3607     {
3608       GdkModifierType extend_mod_mask;
3609       GdkModifierType modify_mod_mask;
3610
3611       extend_mod_mask =
3612         gtk_widget_get_modifier_mask (GTK_WIDGET (icon_view),
3613                                       GDK_MODIFIER_INTENT_EXTEND_SELECTION);
3614       modify_mod_mask =
3615         gtk_widget_get_modifier_mask (GTK_WIDGET (icon_view),
3616                                       GDK_MODIFIER_INTENT_MODIFY_SELECTION);
3617
3618       if ((state & modify_mod_mask) == modify_mod_mask)
3619         icon_view->priv->modify_selection_pressed = TRUE;
3620       if ((state & extend_mod_mask) == extend_mod_mask)
3621         icon_view->priv->extend_selection_pressed = TRUE;
3622     }
3623   /* else we assume not pressed */
3624
3625   switch (step)
3626     {
3627     case GTK_MOVEMENT_LOGICAL_POSITIONS:
3628     case GTK_MOVEMENT_VISUAL_POSITIONS:
3629       gtk_icon_view_move_cursor_left_right (icon_view, count);
3630       break;
3631     case GTK_MOVEMENT_DISPLAY_LINES:
3632       gtk_icon_view_move_cursor_up_down (icon_view, count);
3633       break;
3634     case GTK_MOVEMENT_PAGES:
3635       gtk_icon_view_move_cursor_page_up_down (icon_view, count);
3636       break;
3637     case GTK_MOVEMENT_BUFFER_ENDS:
3638       gtk_icon_view_move_cursor_start_end (icon_view, count);
3639       break;
3640     default:
3641       g_assert_not_reached ();
3642     }
3643
3644   icon_view->priv->modify_selection_pressed = FALSE;
3645   icon_view->priv->extend_selection_pressed = FALSE;
3646
3647   icon_view->priv->draw_focus = TRUE;
3648
3649   return TRUE;
3650 }
3651
3652 static GtkIconViewItem *
3653 find_item (GtkIconView     *icon_view,
3654            GtkIconViewItem *current,
3655            gint             row_ofs,
3656            gint             col_ofs)
3657 {
3658   gint row, col;
3659   GList *items;
3660   GtkIconViewItem *item;
3661
3662   /* FIXME: this could be more efficient
3663    */
3664   row = current->row + row_ofs;
3665   col = current->col + col_ofs;
3666
3667   for (items = icon_view->priv->items; items; items = items->next)
3668     {
3669       item = items->data;
3670       if (item->row == row && item->col == col)
3671         return item;
3672     }
3673
3674   return NULL;
3675 }
3676
3677 static GtkIconViewItem *
3678 find_item_page_up_down (GtkIconView     *icon_view,
3679                         GtkIconViewItem *current,
3680                         gint             count)
3681 {
3682   GList *item, *next;
3683   gint y, col;
3684
3685   col = current->col;
3686   y = current->cell_area.y + count * gtk_adjustment_get_page_size (icon_view->priv->vadjustment);
3687
3688   item = g_list_find (icon_view->priv->items, current);
3689   if (count > 0)
3690     {
3691       while (item)
3692         {
3693           for (next = item->next; next; next = next->next)
3694             {
3695               if (((GtkIconViewItem *)next->data)->col == col)
3696                 break;
3697             }
3698           if (!next || ((GtkIconViewItem *)next->data)->cell_area.y > y)
3699             break;
3700
3701           item = next;
3702         }
3703     }
3704   else
3705     {
3706       while (item)
3707         {
3708           for (next = item->prev; next; next = next->prev)
3709             {
3710               if (((GtkIconViewItem *)next->data)->col == col)
3711                 break;
3712             }
3713           if (!next || ((GtkIconViewItem *)next->data)->cell_area.y < y)
3714             break;
3715
3716           item = next;
3717         }
3718     }
3719
3720   if (item)
3721     return item->data;
3722
3723   return NULL;
3724 }
3725
3726 static gboolean
3727 gtk_icon_view_select_all_between (GtkIconView     *icon_view,
3728                                   GtkIconViewItem *anchor,
3729                                   GtkIconViewItem *cursor)
3730 {
3731   GList *items;
3732   GtkIconViewItem *item;
3733   gint row1, row2, col1, col2;
3734   gboolean dirty = FALSE;
3735
3736   if (anchor->row < cursor->row)
3737     {
3738       row1 = anchor->row;
3739       row2 = cursor->row;
3740     }
3741   else
3742     {
3743       row1 = cursor->row;
3744       row2 = anchor->row;
3745     }
3746
3747   if (anchor->col < cursor->col)
3748     {
3749       col1 = anchor->col;
3750       col2 = cursor->col;
3751     }
3752   else
3753     {
3754       col1 = cursor->col;
3755       col2 = anchor->col;
3756     }
3757
3758   for (items = icon_view->priv->items; items; items = items->next)
3759     {
3760       item = items->data;
3761
3762       if (row1 <= item->row && item->row <= row2 &&
3763           col1 <= item->col && item->col <= col2)
3764         {
3765           if (!item->selected)
3766             {
3767               dirty = TRUE;
3768               item->selected = TRUE;
3769               gtk_icon_view_item_selected_changed (icon_view, item);
3770             }
3771           gtk_icon_view_queue_draw_item (icon_view, item);
3772         }
3773     }
3774
3775   return dirty;
3776 }
3777
3778 static void
3779 gtk_icon_view_move_cursor_up_down (GtkIconView *icon_view,
3780                                    gint         count)
3781 {
3782   GtkIconViewItem *item;
3783   GtkCellRenderer *cell = NULL;
3784   gboolean dirty = FALSE;
3785   gint step;
3786   GtkDirectionType direction;
3787
3788   if (!gtk_widget_has_focus (GTK_WIDGET (icon_view)))
3789     return;
3790
3791   direction = count < 0 ? GTK_DIR_UP : GTK_DIR_DOWN;
3792
3793   if (!icon_view->priv->cursor_item)
3794     {
3795       GList *list;
3796
3797       if (count > 0)
3798         list = icon_view->priv->items;
3799       else
3800         list = g_list_last (icon_view->priv->items);
3801
3802       if (list)
3803         {
3804           item = list->data;
3805
3806           /* Give focus to the first cell initially */
3807           _gtk_icon_view_set_cell_data (icon_view, item);
3808           gtk_cell_area_focus (icon_view->priv->cell_area, direction);
3809         }
3810       else
3811         {
3812           item = NULL;
3813         }
3814     }
3815   else
3816     {
3817       item = icon_view->priv->cursor_item;
3818       step = count > 0 ? 1 : -1;
3819
3820       /* Save the current focus cell in case we hit the edge */
3821       cell = gtk_cell_area_get_focus_cell (icon_view->priv->cell_area);
3822
3823       while (item)
3824         {
3825           _gtk_icon_view_set_cell_data (icon_view, item);
3826
3827           if (gtk_cell_area_focus (icon_view->priv->cell_area, direction))
3828             break;
3829
3830           item = find_item (icon_view, item, step, 0);
3831         }
3832     }
3833
3834   if (!item)
3835     {
3836       if (!gtk_widget_keynav_failed (GTK_WIDGET (icon_view), direction))
3837         {
3838           GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (icon_view));
3839           if (toplevel)
3840             gtk_widget_child_focus (toplevel,
3841                                     direction == GTK_DIR_UP ?
3842                                     GTK_DIR_TAB_BACKWARD :
3843                                     GTK_DIR_TAB_FORWARD);
3844
3845         }
3846
3847       gtk_cell_area_set_focus_cell (icon_view->priv->cell_area, cell);
3848       return;
3849     }
3850
3851   if (icon_view->priv->modify_selection_pressed ||
3852       !icon_view->priv->extend_selection_pressed ||
3853       !icon_view->priv->anchor_item ||
3854       icon_view->priv->selection_mode != GTK_SELECTION_MULTIPLE)
3855     icon_view->priv->anchor_item = item;
3856
3857   cell = gtk_cell_area_get_focus_cell (icon_view->priv->cell_area);
3858   _gtk_icon_view_set_cursor_item (icon_view, item, cell);
3859
3860   if (!icon_view->priv->modify_selection_pressed &&
3861       icon_view->priv->selection_mode != GTK_SELECTION_NONE)
3862     {
3863       dirty = gtk_icon_view_unselect_all_internal (icon_view);
3864       dirty = gtk_icon_view_select_all_between (icon_view,
3865                                                 icon_view->priv->anchor_item,
3866                                                 item) || dirty;
3867     }
3868
3869   gtk_icon_view_scroll_to_item (icon_view, item);
3870
3871   if (dirty)
3872     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
3873 }
3874
3875 static void
3876 gtk_icon_view_move_cursor_page_up_down (GtkIconView *icon_view,
3877                                         gint         count)
3878 {
3879   GtkIconViewItem *item;
3880   gboolean dirty = FALSE;
3881
3882   if (!gtk_widget_has_focus (GTK_WIDGET (icon_view)))
3883     return;
3884
3885   if (!icon_view->priv->cursor_item)
3886     {
3887       GList *list;
3888
3889       if (count > 0)
3890         list = icon_view->priv->items;
3891       else
3892         list = g_list_last (icon_view->priv->items);
3893
3894       item = list ? list->data : NULL;
3895     }
3896   else
3897     item = find_item_page_up_down (icon_view,
3898                                    icon_view->priv->cursor_item,
3899                                    count);
3900
3901   if (item == icon_view->priv->cursor_item)
3902     gtk_widget_error_bell (GTK_WIDGET (icon_view));
3903
3904   if (!item)
3905     return;
3906
3907   if (icon_view->priv->modify_selection_pressed ||
3908       !icon_view->priv->extend_selection_pressed ||
3909       !icon_view->priv->anchor_item ||
3910       icon_view->priv->selection_mode != GTK_SELECTION_MULTIPLE)
3911     icon_view->priv->anchor_item = item;
3912
3913   _gtk_icon_view_set_cursor_item (icon_view, item, NULL);
3914
3915   if (!icon_view->priv->modify_selection_pressed &&
3916       icon_view->priv->selection_mode != GTK_SELECTION_NONE)
3917     {
3918       dirty = gtk_icon_view_unselect_all_internal (icon_view);
3919       dirty = gtk_icon_view_select_all_between (icon_view,
3920                                                 icon_view->priv->anchor_item,
3921                                                 item) || dirty;
3922     }
3923
3924   gtk_icon_view_scroll_to_item (icon_view, item);
3925
3926   if (dirty)
3927     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
3928 }
3929
3930 static void
3931 gtk_icon_view_move_cursor_left_right (GtkIconView *icon_view,
3932                                       gint         count)
3933 {
3934   GtkIconViewItem *item;
3935   GtkCellRenderer *cell = NULL;
3936   gboolean dirty = FALSE;
3937   gint step;
3938   GtkDirectionType direction;
3939
3940   if (!gtk_widget_has_focus (GTK_WIDGET (icon_view)))
3941     return;
3942
3943   direction = count < 0 ? GTK_DIR_LEFT : GTK_DIR_RIGHT;
3944
3945   if (!icon_view->priv->cursor_item)
3946     {
3947       GList *list;
3948
3949       if (count > 0)
3950         list = icon_view->priv->items;
3951       else
3952         list = g_list_last (icon_view->priv->items);
3953
3954       if (list)
3955         {
3956           item = list->data;
3957
3958           /* Give focus to the first cell initially */
3959           _gtk_icon_view_set_cell_data (icon_view, item);
3960           gtk_cell_area_focus (icon_view->priv->cell_area, direction);
3961         }
3962       else
3963         {
3964           item = NULL;
3965         }
3966     }
3967   else
3968     {
3969       item = icon_view->priv->cursor_item;
3970       step = count > 0 ? 1 : -1;
3971
3972       /* Save the current focus cell in case we hit the edge */
3973       cell = gtk_cell_area_get_focus_cell (icon_view->priv->cell_area);
3974
3975       while (item)
3976         {
3977           _gtk_icon_view_set_cell_data (icon_view, item);
3978
3979           if (gtk_cell_area_focus (icon_view->priv->cell_area, direction))
3980             break;
3981
3982           item = find_item (icon_view, item, 0, step);
3983         }
3984     }
3985
3986   if (!item)
3987     {
3988       if (!gtk_widget_keynav_failed (GTK_WIDGET (icon_view), direction))
3989         {
3990           GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (icon_view));
3991           if (toplevel)
3992             gtk_widget_child_focus (toplevel,
3993                                     direction == GTK_DIR_LEFT ?
3994                                     GTK_DIR_TAB_BACKWARD :
3995                                     GTK_DIR_TAB_FORWARD);
3996
3997         }
3998
3999       gtk_cell_area_set_focus_cell (icon_view->priv->cell_area, cell);
4000       return;
4001     }
4002
4003   if (icon_view->priv->modify_selection_pressed ||
4004       !icon_view->priv->extend_selection_pressed ||
4005       !icon_view->priv->anchor_item ||
4006       icon_view->priv->selection_mode != GTK_SELECTION_MULTIPLE)
4007     icon_view->priv->anchor_item = item;
4008
4009   cell = gtk_cell_area_get_focus_cell (icon_view->priv->cell_area);
4010   _gtk_icon_view_set_cursor_item (icon_view, item, cell);
4011
4012   if (!icon_view->priv->modify_selection_pressed &&
4013       icon_view->priv->selection_mode != GTK_SELECTION_NONE)
4014     {
4015       dirty = gtk_icon_view_unselect_all_internal (icon_view);
4016       dirty = gtk_icon_view_select_all_between (icon_view,
4017                                                 icon_view->priv->anchor_item,
4018                                                 item) || dirty;
4019     }
4020
4021   gtk_icon_view_scroll_to_item (icon_view, item);
4022
4023   if (dirty)
4024     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
4025 }
4026
4027 static void
4028 gtk_icon_view_move_cursor_start_end (GtkIconView *icon_view,
4029                                      gint         count)
4030 {
4031   GtkIconViewItem *item;
4032   GList *list;
4033   gboolean dirty = FALSE;
4034
4035   if (!gtk_widget_has_focus (GTK_WIDGET (icon_view)))
4036     return;
4037
4038   if (count < 0)
4039     list = icon_view->priv->items;
4040   else
4041     list = g_list_last (icon_view->priv->items);
4042
4043   item = list ? list->data : NULL;
4044
4045   if (item == icon_view->priv->cursor_item)
4046     gtk_widget_error_bell (GTK_WIDGET (icon_view));
4047
4048   if (!item)
4049     return;
4050
4051   if (icon_view->priv->modify_selection_pressed ||
4052       !icon_view->priv->extend_selection_pressed ||
4053       !icon_view->priv->anchor_item ||
4054       icon_view->priv->selection_mode != GTK_SELECTION_MULTIPLE)
4055     icon_view->priv->anchor_item = item;
4056
4057   _gtk_icon_view_set_cursor_item (icon_view, item, NULL);
4058
4059   if (!icon_view->priv->modify_selection_pressed &&
4060       icon_view->priv->selection_mode != GTK_SELECTION_NONE)
4061     {
4062       dirty = gtk_icon_view_unselect_all_internal (icon_view);
4063       dirty = gtk_icon_view_select_all_between (icon_view,
4064                                                 icon_view->priv->anchor_item,
4065                                                 item) || dirty;
4066     }
4067
4068   gtk_icon_view_scroll_to_item (icon_view, item);
4069
4070   if (dirty)
4071     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
4072 }
4073
4074 /**
4075  * gtk_icon_view_scroll_to_path:
4076  * @icon_view: A #GtkIconView.
4077  * @path: The path of the item to move to.
4078  * @use_align: whether to use alignment arguments, or %FALSE.
4079  * @row_align: The vertical alignment of the item specified by @path.
4080  * @col_align: The horizontal alignment of the item specified by @path.
4081  *
4082  * Moves the alignments of @icon_view to the position specified by @path.
4083  * @row_align determines where the row is placed, and @col_align determines
4084  * where @column is placed.  Both are expected to be between 0.0 and 1.0.
4085  * 0.0 means left/top alignment, 1.0 means right/bottom alignment, 0.5 means
4086  * center.
4087  *
4088  * If @use_align is %FALSE, then the alignment arguments are ignored, and the
4089  * tree does the minimum amount of work to scroll the item onto the screen.
4090  * This means that the item will be scrolled to the edge closest to its current
4091  * position.  If the item is currently visible on the screen, nothing is done.
4092  *
4093  * This function only works if the model is set, and @path is a valid row on
4094  * the model. If the model changes before the @icon_view is realized, the
4095  * centered path will be modified to reflect this change.
4096  *
4097  * Since: 2.8
4098  **/
4099 void
4100 gtk_icon_view_scroll_to_path (GtkIconView *icon_view,
4101                               GtkTreePath *path,
4102                               gboolean     use_align,
4103                               gfloat       row_align,
4104                               gfloat       col_align)
4105 {
4106   GtkIconViewItem *item = NULL;
4107   GtkWidget *widget;
4108
4109   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4110   g_return_if_fail (path != NULL);
4111   g_return_if_fail (row_align >= 0.0 && row_align <= 1.0);
4112   g_return_if_fail (col_align >= 0.0 && col_align <= 1.0);
4113
4114   widget = GTK_WIDGET (icon_view);
4115
4116   if (gtk_tree_path_get_depth (path) > 0)
4117     item = g_list_nth_data (icon_view->priv->items,
4118                             gtk_tree_path_get_indices(path)[0]);
4119
4120   if (!item || item->cell_area.width < 0 ||
4121       !gtk_widget_get_realized (widget))
4122     {
4123       if (icon_view->priv->scroll_to_path)
4124         gtk_tree_row_reference_free (icon_view->priv->scroll_to_path);
4125
4126       icon_view->priv->scroll_to_path = NULL;
4127
4128       if (path)
4129         icon_view->priv->scroll_to_path = gtk_tree_row_reference_new_proxy (G_OBJECT (icon_view), icon_view->priv->model, path);
4130
4131       icon_view->priv->scroll_to_use_align = use_align;
4132       icon_view->priv->scroll_to_row_align = row_align;
4133       icon_view->priv->scroll_to_col_align = col_align;
4134
4135       return;
4136     }
4137
4138   if (use_align)
4139     {
4140       GtkAllocation allocation;
4141       gint x, y;
4142       gfloat offset;
4143       GdkRectangle item_area =
4144         {
4145           item->cell_area.x - icon_view->priv->item_padding,
4146           item->cell_area.y - icon_view->priv->item_padding,
4147           item->cell_area.width  + icon_view->priv->item_padding * 2,
4148           item->cell_area.height + icon_view->priv->item_padding * 2
4149         };
4150
4151       gdk_window_get_position (icon_view->priv->bin_window, &x, &y);
4152
4153       gtk_widget_get_allocation (widget, &allocation);
4154
4155       offset = y + item_area.y - row_align * (allocation.height - item_area.height);
4156
4157       gtk_adjustment_set_value (icon_view->priv->vadjustment,
4158                                 gtk_adjustment_get_value (icon_view->priv->vadjustment) + offset);
4159
4160       offset = x + item_area.x - col_align * (allocation.width - item_area.width);
4161
4162       gtk_adjustment_set_value (icon_view->priv->hadjustment,
4163                                 gtk_adjustment_get_value (icon_view->priv->hadjustment) + offset);
4164
4165       gtk_adjustment_changed (icon_view->priv->hadjustment);
4166       gtk_adjustment_changed (icon_view->priv->vadjustment);
4167     }
4168   else
4169     gtk_icon_view_scroll_to_item (icon_view, item);
4170 }
4171
4172
4173 static void
4174 gtk_icon_view_scroll_to_item (GtkIconView     *icon_view,
4175                               GtkIconViewItem *item)
4176 {
4177   GtkIconViewPrivate *priv = icon_view->priv;
4178   GtkWidget *widget = GTK_WIDGET (icon_view);
4179   GtkAdjustment *hadj, *vadj;
4180   GtkAllocation allocation;
4181   gint x, y;
4182   GdkRectangle item_area;
4183
4184   item_area.x = item->cell_area.x - priv->item_padding;
4185   item_area.y = item->cell_area.y - priv->item_padding;
4186   item_area.width = item->cell_area.width  + priv->item_padding * 2;
4187   item_area.height = item->cell_area.height + priv->item_padding * 2;
4188
4189   gdk_window_get_position (icon_view->priv->bin_window, &x, &y);
4190   gtk_widget_get_allocation (widget, &allocation);
4191
4192   hadj = icon_view->priv->hadjustment;
4193   vadj = icon_view->priv->vadjustment;
4194
4195   if (y + item_area.y < 0)
4196     gtk_adjustment_set_value (vadj,
4197                               gtk_adjustment_get_value (vadj)
4198                                 + y + item_area.y);
4199   else if (y + item_area.y + item_area.height > allocation.height)
4200     gtk_adjustment_set_value (vadj,
4201                               gtk_adjustment_get_value (vadj)
4202                                 + y + item_area.y + item_area.height - allocation.height);
4203
4204   if (x + item_area.x < 0)
4205     gtk_adjustment_set_value (hadj,
4206                               gtk_adjustment_get_value (hadj)
4207                                 + x + item_area.x);
4208   else if (x + item_area.x + item_area.width > allocation.width)
4209     gtk_adjustment_set_value (hadj,
4210                               gtk_adjustment_get_value (hadj)
4211                                 + x + item_area.x + item_area.width - allocation.width);
4212
4213   gtk_adjustment_changed (hadj);
4214   gtk_adjustment_changed (vadj);
4215 }
4216
4217 /* GtkCellLayout implementation */
4218
4219 static void
4220 gtk_icon_view_ensure_cell_area (GtkIconView *icon_view,
4221                                 GtkCellArea *cell_area)
4222 {
4223   GtkIconViewPrivate *priv = icon_view->priv;
4224
4225   if (priv->cell_area)
4226     return;
4227
4228   if (cell_area)
4229     priv->cell_area = cell_area;
4230   else
4231     priv->cell_area = gtk_cell_area_box_new ();
4232
4233   g_object_ref_sink (priv->cell_area);
4234
4235   if (GTK_IS_ORIENTABLE (priv->cell_area))
4236     gtk_orientable_set_orientation (GTK_ORIENTABLE (priv->cell_area), priv->item_orientation);
4237
4238   priv->cell_area_context = gtk_cell_area_create_context (priv->cell_area);
4239
4240   priv->add_editable_id =
4241     g_signal_connect (priv->cell_area, "add-editable",
4242                       G_CALLBACK (gtk_icon_view_add_editable), icon_view);
4243   priv->remove_editable_id =
4244     g_signal_connect (priv->cell_area, "remove-editable",
4245                       G_CALLBACK (gtk_icon_view_remove_editable), icon_view);
4246
4247   update_text_cell (icon_view);
4248   update_pixbuf_cell (icon_view);
4249 }
4250
4251 static GtkCellArea *
4252 gtk_icon_view_cell_layout_get_area (GtkCellLayout *cell_layout)
4253 {
4254   GtkIconView *icon_view = GTK_ICON_VIEW (cell_layout);
4255   GtkIconViewPrivate *priv = icon_view->priv;
4256
4257   if (G_UNLIKELY (!priv->cell_area))
4258     gtk_icon_view_ensure_cell_area (icon_view, NULL);
4259
4260   return icon_view->priv->cell_area;
4261 }
4262
4263 void
4264 _gtk_icon_view_set_cell_data (GtkIconView     *icon_view,
4265                               GtkIconViewItem *item)
4266 {
4267   GtkTreeIter iter;
4268   GtkTreePath *path;
4269
4270   path = gtk_tree_path_new_from_indices (item->index, -1);
4271   if (!gtk_tree_model_get_iter (icon_view->priv->model, &iter, path))
4272     return;
4273   gtk_tree_path_free (path);
4274
4275   gtk_cell_area_apply_attributes (icon_view->priv->cell_area,
4276                                   icon_view->priv->model,
4277                                   &iter, FALSE, FALSE);
4278 }
4279
4280
4281
4282 /* Public API */
4283
4284
4285 /**
4286  * gtk_icon_view_new:
4287  *
4288  * Creates a new #GtkIconView widget
4289  *
4290  * Return value: A newly created #GtkIconView widget
4291  *
4292  * Since: 2.6
4293  **/
4294 GtkWidget *
4295 gtk_icon_view_new (void)
4296 {
4297   return g_object_new (GTK_TYPE_ICON_VIEW, NULL);
4298 }
4299
4300 /**
4301  * gtk_icon_view_new_with_area:
4302  * @area: the #GtkCellArea to use to layout cells
4303  *
4304  * Creates a new #GtkIconView widget using the
4305  * specified @area to layout cells inside the icons.
4306  *
4307  * Return value: A newly created #GtkIconView widget
4308  *
4309  * Since: 3.0
4310  **/
4311 GtkWidget *
4312 gtk_icon_view_new_with_area (GtkCellArea *area)
4313 {
4314   return g_object_new (GTK_TYPE_ICON_VIEW, "cell-area", area, NULL);
4315 }
4316
4317 /**
4318  * gtk_icon_view_new_with_model:
4319  * @model: The model.
4320  *
4321  * Creates a new #GtkIconView widget with the model @model.
4322  *
4323  * Return value: A newly created #GtkIconView widget.
4324  *
4325  * Since: 2.6
4326  **/
4327 GtkWidget *
4328 gtk_icon_view_new_with_model (GtkTreeModel *model)
4329 {
4330   return g_object_new (GTK_TYPE_ICON_VIEW, "model", model, NULL);
4331 }
4332
4333 /**
4334  * gtk_icon_view_convert_widget_to_bin_window_coords:
4335  * @icon_view: a #GtkIconView
4336  * @wx: X coordinate relative to the widget
4337  * @wy: Y coordinate relative to the widget
4338  * @bx: (out): return location for bin_window X coordinate
4339  * @by: (out): return location for bin_window Y coordinate
4340  *
4341  * Converts widget coordinates to coordinates for the bin_window,
4342  * as expected by e.g. gtk_icon_view_get_path_at_pos().
4343  *
4344  * Since: 2.12
4345  */
4346 void
4347 gtk_icon_view_convert_widget_to_bin_window_coords (GtkIconView *icon_view,
4348                                                    gint         wx,
4349                                                    gint         wy,
4350                                                    gint        *bx,
4351                                                    gint        *by)
4352 {
4353   gint x, y;
4354
4355   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4356
4357   if (icon_view->priv->bin_window)
4358     gdk_window_get_position (icon_view->priv->bin_window, &x, &y);
4359   else
4360     x = y = 0;
4361
4362   if (bx)
4363     *bx = wx - x;
4364   if (by)
4365     *by = wy - y;
4366 }
4367
4368 /**
4369  * gtk_icon_view_get_path_at_pos:
4370  * @icon_view: A #GtkIconView.
4371  * @x: The x position to be identified
4372  * @y: The y position to be identified
4373  *
4374  * Finds the path at the point (@x, @y), relative to bin_window coordinates.
4375  * See gtk_icon_view_get_item_at_pos(), if you are also interested in
4376  * the cell at the specified position.
4377  * See gtk_icon_view_convert_widget_to_bin_window_coords() for converting
4378  * widget coordinates to bin_window coordinates.
4379  *
4380  * Return value: The #GtkTreePath corresponding to the icon or %NULL
4381  * if no icon exists at that position.
4382  *
4383  * Since: 2.6
4384  **/
4385 GtkTreePath *
4386 gtk_icon_view_get_path_at_pos (GtkIconView *icon_view,
4387                                gint         x,
4388                                gint         y)
4389 {
4390   GtkIconViewItem *item;
4391   GtkTreePath *path;
4392
4393   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), NULL);
4394
4395   item = _gtk_icon_view_get_item_at_coords (icon_view, x, y, TRUE, NULL);
4396
4397   if (!item)
4398     return NULL;
4399
4400   path = gtk_tree_path_new_from_indices (item->index, -1);
4401
4402   return path;
4403 }
4404
4405 /**
4406  * gtk_icon_view_get_item_at_pos:
4407  * @icon_view: A #GtkIconView.
4408  * @x: The x position to be identified
4409  * @y: The y position to be identified
4410  * @path: (out) (allow-none): Return location for the path, or %NULL
4411  * @cell: (out) (allow-none): Return location for the renderer
4412  *   responsible for the cell at (@x, @y), or %NULL
4413  *
4414  * Finds the path at the point (@x, @y), relative to bin_window coordinates.
4415  * In contrast to gtk_icon_view_get_path_at_pos(), this function also
4416  * obtains the cell at the specified position. The returned path should
4417  * be freed with gtk_tree_path_free().
4418  * See gtk_icon_view_convert_widget_to_bin_window_coords() for converting
4419  * widget coordinates to bin_window coordinates.
4420  *
4421  * Return value: %TRUE if an item exists at the specified position
4422  *
4423  * Since: 2.8
4424  **/
4425 gboolean
4426 gtk_icon_view_get_item_at_pos (GtkIconView      *icon_view,
4427                                gint              x,
4428                                gint              y,
4429                                GtkTreePath     **path,
4430                                GtkCellRenderer **cell)
4431 {
4432   GtkIconViewItem *item;
4433   GtkCellRenderer *renderer = NULL;
4434
4435   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
4436
4437   item = _gtk_icon_view_get_item_at_coords (icon_view, x, y, TRUE, &renderer);
4438
4439   if (path != NULL)
4440     {
4441       if (item != NULL)
4442         *path = gtk_tree_path_new_from_indices (item->index, -1);
4443       else
4444         *path = NULL;
4445     }
4446
4447   if (cell != NULL)
4448     *cell = renderer;
4449
4450   return (item != NULL);
4451 }
4452
4453 /**
4454  * gtk_icon_view_get_cell_rect:
4455  * @icon_view: a #GtkIconView
4456  * @path: a #GtkTreePath
4457  * @cell: (allow-none): a #GtkCellRenderer or %NULL
4458  * @rect: (out): rectangle to fill with cell rect
4459  *
4460  * Fills the bounding rectangle in widget coordinates for the cell specified by
4461  * @path and @cell. If @cell is %NULL the main cell area is used.
4462  *
4463  * This function is only valid if @icon_view is realized.
4464  *
4465  * Return value: %FALSE if there is no such item, %TRUE otherwise
4466  *
4467  * Since: 3.6
4468  */
4469 gboolean
4470 gtk_icon_view_get_cell_rect (GtkIconView     *icon_view,
4471                              GtkTreePath     *path,
4472                              GtkCellRenderer *cell,
4473                              GdkRectangle    *rect)
4474 {
4475   GtkIconViewItem *item = NULL;
4476   gint x, y;
4477
4478   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
4479   g_return_val_if_fail (cell == NULL || GTK_IS_CELL_RENDERER (cell), FALSE);
4480
4481   if (gtk_tree_path_get_depth (path) > 0)
4482     item = g_list_nth_data (icon_view->priv->items,
4483                             gtk_tree_path_get_indices(path)[0]);
4484
4485   if (!item)
4486     return FALSE;
4487
4488   if (cell)
4489     {
4490       GtkCellAreaContext *context;
4491
4492       context = g_ptr_array_index (icon_view->priv->row_contexts, item->row);
4493       _gtk_icon_view_set_cell_data (icon_view, item);
4494       gtk_cell_area_get_cell_allocation (icon_view->priv->cell_area, context,
4495                                          GTK_WIDGET (icon_view),
4496                                          cell, &item->cell_area, rect);
4497     }
4498   else
4499     {
4500       rect->x = item->cell_area.x - icon_view->priv->item_padding;
4501       rect->y = item->cell_area.y - icon_view->priv->item_padding;
4502       rect->width  = item->cell_area.width  + icon_view->priv->item_padding * 2;
4503       rect->height = item->cell_area.height + icon_view->priv->item_padding * 2;
4504     }
4505
4506   if (icon_view->priv->bin_window)
4507     {
4508       gdk_window_get_position (icon_view->priv->bin_window, &x, &y);
4509       rect->x += x;
4510       rect->y += y;
4511     }
4512
4513   return TRUE;
4514 }
4515
4516 /**
4517  * gtk_icon_view_set_tooltip_item:
4518  * @icon_view: a #GtkIconView
4519  * @tooltip: a #GtkTooltip
4520  * @path: a #GtkTreePath
4521  *
4522  * Sets the tip area of @tooltip to be the area covered by the item at @path.
4523  * See also gtk_icon_view_set_tooltip_column() for a simpler alternative.
4524  * See also gtk_tooltip_set_tip_area().
4525  *
4526  * Since: 2.12
4527  */
4528 void
4529 gtk_icon_view_set_tooltip_item (GtkIconView     *icon_view,
4530                                 GtkTooltip      *tooltip,
4531                                 GtkTreePath     *path)
4532 {
4533   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4534   g_return_if_fail (GTK_IS_TOOLTIP (tooltip));
4535
4536   gtk_icon_view_set_tooltip_cell (icon_view, tooltip, path, NULL);
4537 }
4538
4539 /**
4540  * gtk_icon_view_set_tooltip_cell:
4541  * @icon_view: a #GtkIconView
4542  * @tooltip: a #GtkTooltip
4543  * @path: a #GtkTreePath
4544  * @cell: (allow-none): a #GtkCellRenderer or %NULL
4545  *
4546  * Sets the tip area of @tooltip to the area which @cell occupies in
4547  * the item pointed to by @path. See also gtk_tooltip_set_tip_area().
4548  *
4549  * See also gtk_icon_view_set_tooltip_column() for a simpler alternative.
4550  *
4551  * Since: 2.12
4552  */
4553 void
4554 gtk_icon_view_set_tooltip_cell (GtkIconView     *icon_view,
4555                                 GtkTooltip      *tooltip,
4556                                 GtkTreePath     *path,
4557                                 GtkCellRenderer *cell)
4558 {
4559   GdkRectangle rect;
4560
4561   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4562   g_return_if_fail (GTK_IS_TOOLTIP (tooltip));
4563   g_return_if_fail (cell == NULL || GTK_IS_CELL_RENDERER (cell));
4564
4565   if (!gtk_icon_view_get_cell_rect (icon_view, path, cell, &rect))
4566     return;
4567
4568   gtk_tooltip_set_tip_area (tooltip, &rect);
4569 }
4570
4571
4572 /**
4573  * gtk_icon_view_get_tooltip_context:
4574  * @icon_view: an #GtkIconView
4575  * @x: (inout): the x coordinate (relative to widget coordinates)
4576  * @y: (inout): the y coordinate (relative to widget coordinates)
4577  * @keyboard_tip: whether this is a keyboard tooltip or not
4578  * @model: (out) (allow-none) (transfer none): a pointer to receive a
4579  *         #GtkTreeModel or %NULL
4580  * @path: (out) (allow-none): a pointer to receive a #GtkTreePath or %NULL
4581  * @iter: (out) (allow-none): a pointer to receive a #GtkTreeIter or %NULL
4582  *
4583  * This function is supposed to be used in a #GtkWidget::query-tooltip
4584  * signal handler for #GtkIconView.  The @x, @y and @keyboard_tip values
4585  * which are received in the signal handler, should be passed to this
4586  * function without modification.
4587  *
4588  * The return value indicates whether there is an icon view item at the given
4589  * coordinates (%TRUE) or not (%FALSE) for mouse tooltips. For keyboard
4590  * tooltips the item returned will be the cursor item. When %TRUE, then any of
4591  * @model, @path and @iter which have been provided will be set to point to
4592  * that row and the corresponding model. @x and @y will always be converted
4593  * to be relative to @icon_view's bin_window if @keyboard_tooltip is %FALSE.
4594  *
4595  * Return value: whether or not the given tooltip context points to a item
4596  *
4597  * Since: 2.12
4598  */
4599 gboolean
4600 gtk_icon_view_get_tooltip_context (GtkIconView   *icon_view,
4601                                    gint          *x,
4602                                    gint          *y,
4603                                    gboolean       keyboard_tip,
4604                                    GtkTreeModel **model,
4605                                    GtkTreePath  **path,
4606                                    GtkTreeIter   *iter)
4607 {
4608   GtkTreePath *tmppath = NULL;
4609
4610   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
4611   g_return_val_if_fail (x != NULL, FALSE);
4612   g_return_val_if_fail (y != NULL, FALSE);
4613
4614   if (keyboard_tip)
4615     {
4616       gtk_icon_view_get_cursor (icon_view, &tmppath, NULL);
4617
4618       if (!tmppath)
4619         return FALSE;
4620     }
4621   else
4622     {
4623       gtk_icon_view_convert_widget_to_bin_window_coords (icon_view, *x, *y,
4624                                                          x, y);
4625
4626       if (!gtk_icon_view_get_item_at_pos (icon_view, *x, *y, &tmppath, NULL))
4627         return FALSE;
4628     }
4629
4630   if (model)
4631     *model = gtk_icon_view_get_model (icon_view);
4632
4633   if (iter)
4634     gtk_tree_model_get_iter (gtk_icon_view_get_model (icon_view),
4635                              iter, tmppath);
4636
4637   if (path)
4638     *path = tmppath;
4639   else
4640     gtk_tree_path_free (tmppath);
4641
4642   return TRUE;
4643 }
4644
4645 static gboolean
4646 gtk_icon_view_set_tooltip_query_cb (GtkWidget  *widget,
4647                                     gint        x,
4648                                     gint        y,
4649                                     gboolean    keyboard_tip,
4650                                     GtkTooltip *tooltip,
4651                                     gpointer    data)
4652 {
4653   gchar *str;
4654   GtkTreeIter iter;
4655   GtkTreePath *path;
4656   GtkTreeModel *model;
4657   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
4658
4659   if (!gtk_icon_view_get_tooltip_context (GTK_ICON_VIEW (widget),
4660                                           &x, &y,
4661                                           keyboard_tip,
4662                                           &model, &path, &iter))
4663     return FALSE;
4664
4665   gtk_tree_model_get (model, &iter, icon_view->priv->tooltip_column, &str, -1);
4666
4667   if (!str)
4668     {
4669       gtk_tree_path_free (path);
4670       return FALSE;
4671     }
4672
4673   gtk_tooltip_set_markup (tooltip, str);
4674   gtk_icon_view_set_tooltip_item (icon_view, tooltip, path);
4675
4676   gtk_tree_path_free (path);
4677   g_free (str);
4678
4679   return TRUE;
4680 }
4681
4682
4683 /**
4684  * gtk_icon_view_set_tooltip_column:
4685  * @icon_view: a #GtkIconView
4686  * @column: an integer, which is a valid column number for @icon_view's model
4687  *
4688  * If you only plan to have simple (text-only) tooltips on full items, you
4689  * can use this function to have #GtkIconView handle these automatically
4690  * for you. @column should be set to the column in @icon_view's model
4691  * containing the tooltip texts, or -1 to disable this feature.
4692  *
4693  * When enabled, #GtkWidget:has-tooltip will be set to %TRUE and
4694  * @icon_view will connect a #GtkWidget::query-tooltip signal handler.
4695  *
4696  * Note that the signal handler sets the text with gtk_tooltip_set_markup(),
4697  * so &amp;, &lt;, etc have to be escaped in the text.
4698  *
4699  * Since: 2.12
4700  */
4701 void
4702 gtk_icon_view_set_tooltip_column (GtkIconView *icon_view,
4703                                   gint         column)
4704 {
4705   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4706
4707   if (column == icon_view->priv->tooltip_column)
4708     return;
4709
4710   if (column == -1)
4711     {
4712       g_signal_handlers_disconnect_by_func (icon_view,
4713                                             gtk_icon_view_set_tooltip_query_cb,
4714                                             NULL);
4715       gtk_widget_set_has_tooltip (GTK_WIDGET (icon_view), FALSE);
4716     }
4717   else
4718     {
4719       if (icon_view->priv->tooltip_column == -1)
4720         {
4721           g_signal_connect (icon_view, "query-tooltip",
4722                             G_CALLBACK (gtk_icon_view_set_tooltip_query_cb), NULL);
4723           gtk_widget_set_has_tooltip (GTK_WIDGET (icon_view), TRUE);
4724         }
4725     }
4726
4727   icon_view->priv->tooltip_column = column;
4728   g_object_notify (G_OBJECT (icon_view), "tooltip-column");
4729 }
4730
4731 /**
4732  * gtk_icon_view_get_tooltip_column:
4733  * @icon_view: a #GtkIconView
4734  *
4735  * Returns the column of @icon_view's model which is being used for
4736  * displaying tooltips on @icon_view's rows.
4737  *
4738  * Return value: the index of the tooltip column that is currently being
4739  * used, or -1 if this is disabled.
4740  *
4741  * Since: 2.12
4742  */
4743 gint
4744 gtk_icon_view_get_tooltip_column (GtkIconView *icon_view)
4745 {
4746   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), 0);
4747
4748   return icon_view->priv->tooltip_column;
4749 }
4750
4751 /**
4752  * gtk_icon_view_get_visible_range:
4753  * @icon_view: A #GtkIconView
4754  * @start_path: (out) (allow-none): Return location for start of region,
4755  *              or %NULL
4756  * @end_path: (out) (allow-none): Return location for end of region, or %NULL
4757  *
4758  * Sets @start_path and @end_path to be the first and last visible path.
4759  * Note that there may be invisible paths in between.
4760  *
4761  * Both paths should be freed with gtk_tree_path_free() after use.
4762  *
4763  * Return value: %TRUE, if valid paths were placed in @start_path and @end_path
4764  *
4765  * Since: 2.8
4766  **/
4767 gboolean
4768 gtk_icon_view_get_visible_range (GtkIconView  *icon_view,
4769                                  GtkTreePath **start_path,
4770                                  GtkTreePath **end_path)
4771 {
4772   gint start_index = -1;
4773   gint end_index = -1;
4774   GList *icons;
4775
4776   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
4777
4778   if (icon_view->priv->hadjustment == NULL ||
4779       icon_view->priv->vadjustment == NULL)
4780     return FALSE;
4781
4782   if (start_path == NULL && end_path == NULL)
4783     return FALSE;
4784
4785   for (icons = icon_view->priv->items; icons; icons = icons->next)
4786     {
4787       GtkIconViewItem *item = icons->data;
4788       GdkRectangle    *item_area = &item->cell_area;
4789
4790       if ((item_area->x + item_area->width >= (int)gtk_adjustment_get_value (icon_view->priv->hadjustment)) &&
4791           (item_area->y + item_area->height >= (int)gtk_adjustment_get_value (icon_view->priv->vadjustment)) &&
4792           (item_area->x <=
4793            (int) (gtk_adjustment_get_value (icon_view->priv->hadjustment) +
4794                   gtk_adjustment_get_page_size (icon_view->priv->hadjustment))) &&
4795           (item_area->y <=
4796            (int) (gtk_adjustment_get_value (icon_view->priv->vadjustment) +
4797                   gtk_adjustment_get_page_size (icon_view->priv->vadjustment))))
4798         {
4799           if (start_index == -1)
4800             start_index = item->index;
4801           end_index = item->index;
4802         }
4803     }
4804
4805   if (start_path && start_index != -1)
4806     *start_path = gtk_tree_path_new_from_indices (start_index, -1);
4807   if (end_path && end_index != -1)
4808     *end_path = gtk_tree_path_new_from_indices (end_index, -1);
4809
4810   return start_index != -1;
4811 }
4812
4813 /**
4814  * gtk_icon_view_selected_foreach:
4815  * @icon_view: A #GtkIconView.
4816  * @func: (scope call): The function to call for each selected icon.
4817  * @data: User data to pass to the function.
4818  *
4819  * Calls a function for each selected icon. Note that the model or
4820  * selection cannot be modified from within this function.
4821  *
4822  * Since: 2.6
4823  **/
4824 void
4825 gtk_icon_view_selected_foreach (GtkIconView           *icon_view,
4826                                 GtkIconViewForeachFunc func,
4827                                 gpointer               data)
4828 {
4829   GList *list;
4830
4831   for (list = icon_view->priv->items; list; list = list->next)
4832     {
4833       GtkIconViewItem *item = list->data;
4834       GtkTreePath *path = gtk_tree_path_new_from_indices (item->index, -1);
4835
4836       if (item->selected)
4837         (* func) (icon_view, path, data);
4838
4839       gtk_tree_path_free (path);
4840     }
4841 }
4842
4843 /**
4844  * gtk_icon_view_set_selection_mode:
4845  * @icon_view: A #GtkIconView.
4846  * @mode: The selection mode
4847  *
4848  * Sets the selection mode of the @icon_view.
4849  *
4850  * Since: 2.6
4851  **/
4852 void
4853 gtk_icon_view_set_selection_mode (GtkIconView      *icon_view,
4854                                   GtkSelectionMode  mode)
4855 {
4856   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4857
4858   if (mode == icon_view->priv->selection_mode)
4859     return;
4860
4861   if (mode == GTK_SELECTION_NONE ||
4862       icon_view->priv->selection_mode == GTK_SELECTION_MULTIPLE)
4863     gtk_icon_view_unselect_all (icon_view);
4864
4865   icon_view->priv->selection_mode = mode;
4866
4867   g_object_notify (G_OBJECT (icon_view), "selection-mode");
4868 }
4869
4870 /**
4871  * gtk_icon_view_get_selection_mode:
4872  * @icon_view: A #GtkIconView.
4873  *
4874  * Gets the selection mode of the @icon_view.
4875  *
4876  * Return value: the current selection mode
4877  *
4878  * Since: 2.6
4879  **/
4880 GtkSelectionMode
4881 gtk_icon_view_get_selection_mode (GtkIconView *icon_view)
4882 {
4883   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), GTK_SELECTION_SINGLE);
4884
4885   return icon_view->priv->selection_mode;
4886 }
4887
4888 /**
4889  * gtk_icon_view_set_model:
4890  * @icon_view: A #GtkIconView.
4891  * @model: (allow-none): The model.
4892  *
4893  * Sets the model for a #GtkIconView.
4894  * If the @icon_view already has a model set, it will remove
4895  * it before setting the new model.  If @model is %NULL, then
4896  * it will unset the old model.
4897  *
4898  * Since: 2.6
4899  **/
4900 void
4901 gtk_icon_view_set_model (GtkIconView *icon_view,
4902                          GtkTreeModel *model)
4903 {
4904   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4905   g_return_if_fail (model == NULL || GTK_IS_TREE_MODEL (model));
4906
4907   if (icon_view->priv->model == model)
4908     return;
4909
4910   if (icon_view->priv->scroll_to_path)
4911     {
4912       gtk_tree_row_reference_free (icon_view->priv->scroll_to_path);
4913       icon_view->priv->scroll_to_path = NULL;
4914     }
4915
4916   /* The area can be NULL while disposing */
4917   if (icon_view->priv->cell_area)
4918     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
4919
4920   if (model)
4921     {
4922       GType column_type;
4923
4924       if (icon_view->priv->pixbuf_column != -1)
4925         {
4926           column_type = gtk_tree_model_get_column_type (model,
4927                                                         icon_view->priv->pixbuf_column);
4928
4929           g_return_if_fail (column_type == GDK_TYPE_PIXBUF);
4930         }
4931
4932       if (icon_view->priv->text_column != -1)
4933         {
4934           column_type = gtk_tree_model_get_column_type (model,
4935                                                         icon_view->priv->text_column);
4936
4937           g_return_if_fail (column_type == G_TYPE_STRING);
4938         }
4939
4940       if (icon_view->priv->markup_column != -1)
4941         {
4942           column_type = gtk_tree_model_get_column_type (model,
4943                                                         icon_view->priv->markup_column);
4944
4945           g_return_if_fail (column_type == G_TYPE_STRING);
4946         }
4947
4948     }
4949
4950   if (icon_view->priv->model)
4951     {
4952       g_signal_handlers_disconnect_by_func (icon_view->priv->model,
4953                                             gtk_icon_view_row_changed,
4954                                             icon_view);
4955       g_signal_handlers_disconnect_by_func (icon_view->priv->model,
4956                                             gtk_icon_view_row_inserted,
4957                                             icon_view);
4958       g_signal_handlers_disconnect_by_func (icon_view->priv->model,
4959                                             gtk_icon_view_row_deleted,
4960                                             icon_view);
4961       g_signal_handlers_disconnect_by_func (icon_view->priv->model,
4962                                             gtk_icon_view_rows_reordered,
4963                                             icon_view);
4964
4965       g_object_unref (icon_view->priv->model);
4966
4967       g_list_free_full (icon_view->priv->items, (GDestroyNotify) gtk_icon_view_item_free);
4968       icon_view->priv->items = NULL;
4969       icon_view->priv->anchor_item = NULL;
4970       icon_view->priv->cursor_item = NULL;
4971       icon_view->priv->last_single_clicked = NULL;
4972       icon_view->priv->last_prelight = NULL;
4973       icon_view->priv->width = 0;
4974       icon_view->priv->height = 0;
4975     }
4976
4977   icon_view->priv->model = model;
4978
4979   if (icon_view->priv->model)
4980     {
4981       g_object_ref (icon_view->priv->model);
4982       g_signal_connect (icon_view->priv->model,
4983                         "row-changed",
4984                         G_CALLBACK (gtk_icon_view_row_changed),
4985                         icon_view);
4986       g_signal_connect (icon_view->priv->model,
4987                         "row-inserted",
4988                         G_CALLBACK (gtk_icon_view_row_inserted),
4989                         icon_view);
4990       g_signal_connect (icon_view->priv->model,
4991                         "row-deleted",
4992                         G_CALLBACK (gtk_icon_view_row_deleted),
4993                         icon_view);
4994       g_signal_connect (icon_view->priv->model,
4995                         "rows-reordered",
4996                         G_CALLBACK (gtk_icon_view_rows_reordered),
4997                         icon_view);
4998
4999       gtk_icon_view_build_items (icon_view);
5000     }
5001
5002   g_object_notify (G_OBJECT (icon_view), "model");
5003
5004   gtk_widget_queue_resize (GTK_WIDGET (icon_view));
5005 }
5006
5007 /**
5008  * gtk_icon_view_get_model:
5009  * @icon_view: a #GtkIconView
5010  *
5011  * Returns the model the #GtkIconView is based on.  Returns %NULL if the
5012  * model is unset.
5013  *
5014  * Return value: (transfer none): A #GtkTreeModel, or %NULL if none is
5015  *     currently being used.
5016  *
5017  * Since: 2.6
5018  **/
5019 GtkTreeModel *
5020 gtk_icon_view_get_model (GtkIconView *icon_view)
5021 {
5022   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), NULL);
5023
5024   return icon_view->priv->model;
5025 }
5026
5027 static void
5028 update_text_cell (GtkIconView *icon_view)
5029 {
5030   if (!icon_view->priv->cell_area)
5031     return;
5032
5033   if (icon_view->priv->text_column == -1 &&
5034       icon_view->priv->markup_column == -1)
5035     {
5036       if (icon_view->priv->text_cell != NULL)
5037         {
5038           gtk_cell_area_remove (icon_view->priv->cell_area,
5039                                 icon_view->priv->text_cell);
5040           icon_view->priv->text_cell = NULL;
5041         }
5042     }
5043   else
5044     {
5045       if (icon_view->priv->text_cell == NULL)
5046         {
5047           icon_view->priv->text_cell = gtk_cell_renderer_text_new ();
5048
5049           gtk_cell_layout_pack_end (GTK_CELL_LAYOUT (icon_view), icon_view->priv->text_cell, FALSE);
5050         }
5051
5052       if (icon_view->priv->markup_column != -1)
5053         gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (icon_view),
5054                                         icon_view->priv->text_cell,
5055                                         "markup", icon_view->priv->markup_column,
5056                                         NULL);
5057       else
5058         gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (icon_view),
5059                                         icon_view->priv->text_cell,
5060                                         "text", icon_view->priv->text_column,
5061                                         NULL);
5062
5063       if (icon_view->priv->item_orientation == GTK_ORIENTATION_VERTICAL)
5064         g_object_set (icon_view->priv->text_cell,
5065                       "alignment", PANGO_ALIGN_CENTER,
5066                       "wrap-mode", PANGO_WRAP_WORD_CHAR,
5067                       "xalign", 0.5,
5068                       "yalign", 0.0,
5069                       NULL);
5070       else
5071         g_object_set (icon_view->priv->text_cell,
5072                       "alignment", PANGO_ALIGN_LEFT,
5073                       "wrap-mode", PANGO_WRAP_WORD_CHAR,
5074                       "xalign", 0.0,
5075                       "yalign", 0.5,
5076                       NULL);
5077     }
5078 }
5079
5080 static void
5081 update_pixbuf_cell (GtkIconView *icon_view)
5082 {
5083   if (!icon_view->priv->cell_area)
5084     return;
5085
5086   if (icon_view->priv->pixbuf_column == -1)
5087     {
5088       if (icon_view->priv->pixbuf_cell != NULL)
5089         {
5090           gtk_cell_area_remove (icon_view->priv->cell_area,
5091                                 icon_view->priv->pixbuf_cell);
5092
5093           icon_view->priv->pixbuf_cell = NULL;
5094         }
5095     }
5096   else
5097     {
5098       if (icon_view->priv->pixbuf_cell == NULL)
5099         {
5100           icon_view->priv->pixbuf_cell = gtk_cell_renderer_pixbuf_new ();
5101
5102           gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (icon_view), icon_view->priv->pixbuf_cell, FALSE);
5103         }
5104
5105       gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (icon_view),
5106                                       icon_view->priv->pixbuf_cell,
5107                                       "pixbuf", icon_view->priv->pixbuf_column,
5108                                       NULL);
5109
5110       if (icon_view->priv->item_orientation == GTK_ORIENTATION_VERTICAL)
5111         g_object_set (icon_view->priv->pixbuf_cell,
5112                       "xalign", 0.5,
5113                       "yalign", 1.0,
5114                       NULL);
5115       else
5116         g_object_set (icon_view->priv->pixbuf_cell,
5117                       "xalign", 0.0,
5118                       "yalign", 0.0,
5119                       NULL);
5120     }
5121 }
5122
5123 /**
5124  * gtk_icon_view_set_text_column:
5125  * @icon_view: A #GtkIconView.
5126  * @column: A column in the currently used model, or -1 to display no text
5127  *
5128  * Sets the column with text for @icon_view to be @column. The text
5129  * column must be of type #G_TYPE_STRING.
5130  *
5131  * Since: 2.6
5132  **/
5133 void
5134 gtk_icon_view_set_text_column (GtkIconView *icon_view,
5135                                gint          column)
5136 {
5137   if (column == icon_view->priv->text_column)
5138     return;
5139
5140   if (column == -1)
5141     icon_view->priv->text_column = -1;
5142   else
5143     {
5144       if (icon_view->priv->model != NULL)
5145         {
5146           GType column_type;
5147
5148           column_type = gtk_tree_model_get_column_type (icon_view->priv->model, column);
5149
5150           g_return_if_fail (column_type == G_TYPE_STRING);
5151         }
5152
5153       icon_view->priv->text_column = column;
5154     }
5155
5156   if (icon_view->priv->cell_area)
5157     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5158
5159   update_text_cell (icon_view);
5160
5161   gtk_icon_view_invalidate_sizes (icon_view);
5162
5163   g_object_notify (G_OBJECT (icon_view), "text-column");
5164 }
5165
5166 /**
5167  * gtk_icon_view_get_text_column:
5168  * @icon_view: A #GtkIconView.
5169  *
5170  * Returns the column with text for @icon_view.
5171  *
5172  * Returns: the text column, or -1 if it's unset.
5173  *
5174  * Since: 2.6
5175  */
5176 gint
5177 gtk_icon_view_get_text_column (GtkIconView  *icon_view)
5178 {
5179   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5180
5181   return icon_view->priv->text_column;
5182 }
5183
5184 /**
5185  * gtk_icon_view_set_markup_column:
5186  * @icon_view: A #GtkIconView.
5187  * @column: A column in the currently used model, or -1 to display no text
5188  *
5189  * Sets the column with markup information for @icon_view to be
5190  * @column. The markup column must be of type #G_TYPE_STRING.
5191  * If the markup column is set to something, it overrides
5192  * the text column set by gtk_icon_view_set_text_column().
5193  *
5194  * Since: 2.6
5195  **/
5196 void
5197 gtk_icon_view_set_markup_column (GtkIconView *icon_view,
5198                                  gint         column)
5199 {
5200   if (column == icon_view->priv->markup_column)
5201     return;
5202
5203   if (column == -1)
5204     icon_view->priv->markup_column = -1;
5205   else
5206     {
5207       if (icon_view->priv->model != NULL)
5208         {
5209           GType column_type;
5210
5211           column_type = gtk_tree_model_get_column_type (icon_view->priv->model, column);
5212
5213           g_return_if_fail (column_type == G_TYPE_STRING);
5214         }
5215
5216       icon_view->priv->markup_column = column;
5217     }
5218
5219   if (icon_view->priv->cell_area)
5220     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5221
5222   update_text_cell (icon_view);
5223
5224   gtk_icon_view_invalidate_sizes (icon_view);
5225
5226   g_object_notify (G_OBJECT (icon_view), "markup-column");
5227 }
5228
5229 /**
5230  * gtk_icon_view_get_markup_column:
5231  * @icon_view: A #GtkIconView.
5232  *
5233  * Returns the column with markup text for @icon_view.
5234  *
5235  * Returns: the markup column, or -1 if it's unset.
5236  *
5237  * Since: 2.6
5238  */
5239 gint
5240 gtk_icon_view_get_markup_column (GtkIconView  *icon_view)
5241 {
5242   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5243
5244   return icon_view->priv->markup_column;
5245 }
5246
5247 /**
5248  * gtk_icon_view_set_pixbuf_column:
5249  * @icon_view: A #GtkIconView.
5250  * @column: A column in the currently used model, or -1 to disable
5251  *
5252  * Sets the column with pixbufs for @icon_view to be @column. The pixbuf
5253  * column must be of type #GDK_TYPE_PIXBUF
5254  *
5255  * Since: 2.6
5256  **/
5257 void
5258 gtk_icon_view_set_pixbuf_column (GtkIconView *icon_view,
5259                                  gint         column)
5260 {
5261   if (column == icon_view->priv->pixbuf_column)
5262     return;
5263
5264   if (column == -1)
5265     icon_view->priv->pixbuf_column = -1;
5266   else
5267     {
5268       if (icon_view->priv->model != NULL)
5269         {
5270           GType column_type;
5271
5272           column_type = gtk_tree_model_get_column_type (icon_view->priv->model, column);
5273
5274           g_return_if_fail (column_type == GDK_TYPE_PIXBUF);
5275         }
5276
5277       icon_view->priv->pixbuf_column = column;
5278     }
5279
5280   if (icon_view->priv->cell_area)
5281     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5282
5283   update_pixbuf_cell (icon_view);
5284
5285   gtk_icon_view_invalidate_sizes (icon_view);
5286
5287   g_object_notify (G_OBJECT (icon_view), "pixbuf-column");
5288
5289 }
5290
5291 /**
5292  * gtk_icon_view_get_pixbuf_column:
5293  * @icon_view: A #GtkIconView.
5294  *
5295  * Returns the column with pixbufs for @icon_view.
5296  *
5297  * Returns: the pixbuf column, or -1 if it's unset.
5298  *
5299  * Since: 2.6
5300  */
5301 gint
5302 gtk_icon_view_get_pixbuf_column (GtkIconView  *icon_view)
5303 {
5304   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5305
5306   return icon_view->priv->pixbuf_column;
5307 }
5308
5309 /**
5310  * gtk_icon_view_select_path:
5311  * @icon_view: A #GtkIconView.
5312  * @path: The #GtkTreePath to be selected.
5313  *
5314  * Selects the row at @path.
5315  *
5316  * Since: 2.6
5317  **/
5318 void
5319 gtk_icon_view_select_path (GtkIconView *icon_view,
5320                            GtkTreePath *path)
5321 {
5322   GtkIconViewItem *item = NULL;
5323
5324   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5325   g_return_if_fail (icon_view->priv->model != NULL);
5326   g_return_if_fail (path != NULL);
5327
5328   if (gtk_tree_path_get_depth (path) > 0)
5329     item = g_list_nth_data (icon_view->priv->items,
5330                             gtk_tree_path_get_indices(path)[0]);
5331
5332   if (item)
5333     _gtk_icon_view_select_item (icon_view, item);
5334 }
5335
5336 /**
5337  * gtk_icon_view_unselect_path:
5338  * @icon_view: A #GtkIconView.
5339  * @path: The #GtkTreePath to be unselected.
5340  *
5341  * Unselects the row at @path.
5342  *
5343  * Since: 2.6
5344  **/
5345 void
5346 gtk_icon_view_unselect_path (GtkIconView *icon_view,
5347                              GtkTreePath *path)
5348 {
5349   GtkIconViewItem *item;
5350
5351   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5352   g_return_if_fail (icon_view->priv->model != NULL);
5353   g_return_if_fail (path != NULL);
5354
5355   item = g_list_nth_data (icon_view->priv->items,
5356                           gtk_tree_path_get_indices(path)[0]);
5357
5358   if (!item)
5359     return;
5360
5361   _gtk_icon_view_unselect_item (icon_view, item);
5362 }
5363
5364 /**
5365  * gtk_icon_view_get_selected_items:
5366  * @icon_view: A #GtkIconView.
5367  *
5368  * Creates a list of paths of all selected items. Additionally, if you are
5369  * planning on modifying the model after calling this function, you may
5370  * want to convert the returned list into a list of #GtkTreeRowReference<!-- -->s.
5371  * To do this, you can use gtk_tree_row_reference_new().
5372  *
5373  * To free the return value, use:
5374  * |[
5375  * g_list_free_full (list, (GDestroyNotify) gtk_tree_path_free);
5376  * ]|
5377  *
5378  * Return value: (element-type GtkTreePath) (transfer full): A #GList containing a #GtkTreePath for each selected row.
5379  *
5380  * Since: 2.6
5381  **/
5382 GList *
5383 gtk_icon_view_get_selected_items (GtkIconView *icon_view)
5384 {
5385   GList *list;
5386   GList *selected = NULL;
5387
5388   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), NULL);
5389
5390   for (list = icon_view->priv->items; list != NULL; list = list->next)
5391     {
5392       GtkIconViewItem *item = list->data;
5393
5394       if (item->selected)
5395         {
5396           GtkTreePath *path = gtk_tree_path_new_from_indices (item->index, -1);
5397
5398           selected = g_list_prepend (selected, path);
5399         }
5400     }
5401
5402   return selected;
5403 }
5404
5405 /**
5406  * gtk_icon_view_select_all:
5407  * @icon_view: A #GtkIconView.
5408  *
5409  * Selects all the icons. @icon_view must has its selection mode set
5410  * to #GTK_SELECTION_MULTIPLE.
5411  *
5412  * Since: 2.6
5413  **/
5414 void
5415 gtk_icon_view_select_all (GtkIconView *icon_view)
5416 {
5417   GList *items;
5418   gboolean dirty = FALSE;
5419
5420   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5421
5422   if (icon_view->priv->selection_mode != GTK_SELECTION_MULTIPLE)
5423     return;
5424
5425   for (items = icon_view->priv->items; items; items = items->next)
5426     {
5427       GtkIconViewItem *item = items->data;
5428
5429       if (!item->selected)
5430         {
5431           dirty = TRUE;
5432           item->selected = TRUE;
5433           gtk_icon_view_queue_draw_item (icon_view, item);
5434         }
5435     }
5436
5437   if (dirty)
5438     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
5439 }
5440
5441 /**
5442  * gtk_icon_view_unselect_all:
5443  * @icon_view: A #GtkIconView.
5444  *
5445  * Unselects all the icons.
5446  *
5447  * Since: 2.6
5448  **/
5449 void
5450 gtk_icon_view_unselect_all (GtkIconView *icon_view)
5451 {
5452   gboolean dirty = FALSE;
5453
5454   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5455
5456   if (icon_view->priv->selection_mode == GTK_SELECTION_BROWSE)
5457     return;
5458
5459   dirty = gtk_icon_view_unselect_all_internal (icon_view);
5460
5461   if (dirty)
5462     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
5463 }
5464
5465 /**
5466  * gtk_icon_view_path_is_selected:
5467  * @icon_view: A #GtkIconView.
5468  * @path: A #GtkTreePath to check selection on.
5469  *
5470  * Returns %TRUE if the icon pointed to by @path is currently
5471  * selected. If @path does not point to a valid location, %FALSE is returned.
5472  *
5473  * Return value: %TRUE if @path is selected.
5474  *
5475  * Since: 2.6
5476  **/
5477 gboolean
5478 gtk_icon_view_path_is_selected (GtkIconView *icon_view,
5479                                 GtkTreePath *path)
5480 {
5481   GtkIconViewItem *item;
5482
5483   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
5484   g_return_val_if_fail (icon_view->priv->model != NULL, FALSE);
5485   g_return_val_if_fail (path != NULL, FALSE);
5486
5487   item = g_list_nth_data (icon_view->priv->items,
5488                           gtk_tree_path_get_indices(path)[0]);
5489
5490   if (!item)
5491     return FALSE;
5492
5493   return item->selected;
5494 }
5495
5496 /**
5497  * gtk_icon_view_get_item_row:
5498  * @icon_view: a #GtkIconView
5499  * @path: the #GtkTreePath of the item
5500  *
5501  * Gets the row in which the item @path is currently
5502  * displayed. Row numbers start at 0.
5503  *
5504  * Returns: The row in which the item is displayed
5505  *
5506  * Since: 2.22
5507  */
5508 gint
5509 gtk_icon_view_get_item_row (GtkIconView *icon_view,
5510                             GtkTreePath *path)
5511 {
5512   GtkIconViewItem *item;
5513
5514   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5515   g_return_val_if_fail (icon_view->priv->model != NULL, -1);
5516   g_return_val_if_fail (path != NULL, -1);
5517
5518   item = g_list_nth_data (icon_view->priv->items,
5519                           gtk_tree_path_get_indices(path)[0]);
5520
5521   if (!item)
5522     return -1;
5523
5524   return item->row;
5525 }
5526
5527 /**
5528  * gtk_icon_view_get_item_column:
5529  * @icon_view: a #GtkIconView
5530  * @path: the #GtkTreePath of the item
5531  *
5532  * Gets the column in which the item @path is currently
5533  * displayed. Column numbers start at 0.
5534  *
5535  * Returns: The column in which the item is displayed
5536  *
5537  * Since: 2.22
5538  */
5539 gint
5540 gtk_icon_view_get_item_column (GtkIconView *icon_view,
5541                                GtkTreePath *path)
5542 {
5543   GtkIconViewItem *item;
5544
5545   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5546   g_return_val_if_fail (icon_view->priv->model != NULL, -1);
5547   g_return_val_if_fail (path != NULL, -1);
5548
5549   item = g_list_nth_data (icon_view->priv->items,
5550                           gtk_tree_path_get_indices(path)[0]);
5551
5552   if (!item)
5553     return -1;
5554
5555   return item->col;
5556 }
5557
5558 /**
5559  * gtk_icon_view_item_activated:
5560  * @icon_view: A #GtkIconView
5561  * @path: The #GtkTreePath to be activated
5562  *
5563  * Activates the item determined by @path.
5564  *
5565  * Since: 2.6
5566  **/
5567 void
5568 gtk_icon_view_item_activated (GtkIconView      *icon_view,
5569                               GtkTreePath      *path)
5570 {
5571   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5572   g_return_if_fail (path != NULL);
5573
5574   g_signal_emit (icon_view, icon_view_signals[ITEM_ACTIVATED], 0, path);
5575 }
5576
5577 /**
5578  * gtk_icon_view_set_item_orientation:
5579  * @icon_view: a #GtkIconView
5580  * @orientation: the relative position of texts and icons
5581  *
5582  * Sets the ::item-orientation property which determines whether the labels
5583  * are drawn beside the icons instead of below.
5584  *
5585  * Since: 2.6
5586  **/
5587 void
5588 gtk_icon_view_set_item_orientation (GtkIconView    *icon_view,
5589                                     GtkOrientation  orientation)
5590 {
5591   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5592
5593   if (icon_view->priv->item_orientation != orientation)
5594     {
5595       icon_view->priv->item_orientation = orientation;
5596
5597       if (icon_view->priv->cell_area)
5598         {
5599           if (GTK_IS_ORIENTABLE (icon_view->priv->cell_area))
5600             gtk_orientable_set_orientation (GTK_ORIENTABLE (icon_view->priv->cell_area),
5601                                             icon_view->priv->item_orientation);
5602
5603           gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5604         }
5605
5606       gtk_icon_view_invalidate_sizes (icon_view);
5607
5608       update_text_cell (icon_view);
5609       update_pixbuf_cell (icon_view);
5610
5611       g_object_notify (G_OBJECT (icon_view), "item-orientation");
5612     }
5613 }
5614
5615 /**
5616  * gtk_icon_view_get_item_orientation:
5617  * @icon_view: a #GtkIconView
5618  *
5619  * Returns the value of the ::item-orientation property which determines
5620  * whether the labels are drawn beside the icons instead of below.
5621  *
5622  * Return value: the relative position of texts and icons
5623  *
5624  * Since: 2.6
5625  **/
5626 GtkOrientation
5627 gtk_icon_view_get_item_orientation (GtkIconView *icon_view)
5628 {
5629   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view),
5630                         GTK_ORIENTATION_VERTICAL);
5631
5632   return icon_view->priv->item_orientation;
5633 }
5634
5635 /**
5636  * gtk_icon_view_set_columns:
5637  * @icon_view: a #GtkIconView
5638  * @columns: the number of columns
5639  *
5640  * Sets the ::columns property which determines in how
5641  * many columns the icons are arranged. If @columns is
5642  * -1, the number of columns will be chosen automatically
5643  * to fill the available area.
5644  *
5645  * Since: 2.6
5646  */
5647 void
5648 gtk_icon_view_set_columns (GtkIconView *icon_view,
5649                            gint         columns)
5650 {
5651   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5652
5653   if (icon_view->priv->columns != columns)
5654     {
5655       icon_view->priv->columns = columns;
5656
5657       if (icon_view->priv->cell_area)
5658         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5659
5660       gtk_widget_queue_resize (GTK_WIDGET (icon_view));
5661
5662       g_object_notify (G_OBJECT (icon_view), "columns");
5663     }
5664 }
5665
5666 /**
5667  * gtk_icon_view_get_columns:
5668  * @icon_view: a #GtkIconView
5669  *
5670  * Returns the value of the ::columns property.
5671  *
5672  * Return value: the number of columns, or -1
5673  *
5674  * Since: 2.6
5675  */
5676 gint
5677 gtk_icon_view_get_columns (GtkIconView *icon_view)
5678 {
5679   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5680
5681   return icon_view->priv->columns;
5682 }
5683
5684 /**
5685  * gtk_icon_view_set_item_width:
5686  * @icon_view: a #GtkIconView
5687  * @item_width: the width for each item
5688  *
5689  * Sets the ::item-width property which specifies the width
5690  * to use for each item. If it is set to -1, the icon view will
5691  * automatically determine a suitable item size.
5692  *
5693  * Since: 2.6
5694  */
5695 void
5696 gtk_icon_view_set_item_width (GtkIconView *icon_view,
5697                               gint         item_width)
5698 {
5699   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5700
5701   if (icon_view->priv->item_width != item_width)
5702     {
5703       icon_view->priv->item_width = item_width;
5704
5705       if (icon_view->priv->cell_area)
5706         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5707
5708       gtk_icon_view_invalidate_sizes (icon_view);
5709
5710       update_text_cell (icon_view);
5711
5712       g_object_notify (G_OBJECT (icon_view), "item-width");
5713     }
5714 }
5715
5716 /**
5717  * gtk_icon_view_get_item_width:
5718  * @icon_view: a #GtkIconView
5719  *
5720  * Returns the value of the ::item-width property.
5721  *
5722  * Return value: the width of a single item, or -1
5723  *
5724  * Since: 2.6
5725  */
5726 gint
5727 gtk_icon_view_get_item_width (GtkIconView *icon_view)
5728 {
5729   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5730
5731   return icon_view->priv->item_width;
5732 }
5733
5734
5735 /**
5736  * gtk_icon_view_set_spacing:
5737  * @icon_view: a #GtkIconView
5738  * @spacing: the spacing
5739  *
5740  * Sets the ::spacing property which specifies the space
5741  * which is inserted between the cells (i.e. the icon and
5742  * the text) of an item.
5743  *
5744  * Since: 2.6
5745  */
5746 void
5747 gtk_icon_view_set_spacing (GtkIconView *icon_view,
5748                            gint         spacing)
5749 {
5750   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5751
5752   if (icon_view->priv->spacing != spacing)
5753     {
5754       icon_view->priv->spacing = spacing;
5755
5756       if (icon_view->priv->cell_area)
5757         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5758
5759       gtk_icon_view_invalidate_sizes (icon_view);
5760
5761       g_object_notify (G_OBJECT (icon_view), "spacing");
5762     }
5763 }
5764
5765 /**
5766  * gtk_icon_view_get_spacing:
5767  * @icon_view: a #GtkIconView
5768  *
5769  * Returns the value of the ::spacing property.
5770  *
5771  * Return value: the space between cells
5772  *
5773  * Since: 2.6
5774  */
5775 gint
5776 gtk_icon_view_get_spacing (GtkIconView *icon_view)
5777 {
5778   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5779
5780   return icon_view->priv->spacing;
5781 }
5782
5783 /**
5784  * gtk_icon_view_set_row_spacing:
5785  * @icon_view: a #GtkIconView
5786  * @row_spacing: the row spacing
5787  *
5788  * Sets the ::row-spacing property which specifies the space
5789  * which is inserted between the rows of the icon view.
5790  *
5791  * Since: 2.6
5792  */
5793 void
5794 gtk_icon_view_set_row_spacing (GtkIconView *icon_view,
5795                                gint         row_spacing)
5796 {
5797   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5798
5799   if (icon_view->priv->row_spacing != row_spacing)
5800     {
5801       icon_view->priv->row_spacing = row_spacing;
5802
5803       if (icon_view->priv->cell_area)
5804         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5805
5806       gtk_icon_view_invalidate_sizes (icon_view);
5807
5808       g_object_notify (G_OBJECT (icon_view), "row-spacing");
5809     }
5810 }
5811
5812 /**
5813  * gtk_icon_view_get_row_spacing:
5814  * @icon_view: a #GtkIconView
5815  *
5816  * Returns the value of the ::row-spacing property.
5817  *
5818  * Return value: the space between rows
5819  *
5820  * Since: 2.6
5821  */
5822 gint
5823 gtk_icon_view_get_row_spacing (GtkIconView *icon_view)
5824 {
5825   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5826
5827   return icon_view->priv->row_spacing;
5828 }
5829
5830 /**
5831  * gtk_icon_view_set_column_spacing:
5832  * @icon_view: a #GtkIconView
5833  * @column_spacing: the column spacing
5834  *
5835  * Sets the ::column-spacing property which specifies the space
5836  * which is inserted between the columns of the icon view.
5837  *
5838  * Since: 2.6
5839  */
5840 void
5841 gtk_icon_view_set_column_spacing (GtkIconView *icon_view,
5842                                   gint         column_spacing)
5843 {
5844   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5845
5846   if (icon_view->priv->column_spacing != column_spacing)
5847     {
5848       icon_view->priv->column_spacing = column_spacing;
5849
5850       if (icon_view->priv->cell_area)
5851         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5852
5853       gtk_icon_view_invalidate_sizes (icon_view);
5854
5855       g_object_notify (G_OBJECT (icon_view), "column-spacing");
5856     }
5857 }
5858
5859 /**
5860  * gtk_icon_view_get_column_spacing:
5861  * @icon_view: a #GtkIconView
5862  *
5863  * Returns the value of the ::column-spacing property.
5864  *
5865  * Return value: the space between columns
5866  *
5867  * Since: 2.6
5868  */
5869 gint
5870 gtk_icon_view_get_column_spacing (GtkIconView *icon_view)
5871 {
5872   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5873
5874   return icon_view->priv->column_spacing;
5875 }
5876
5877 /**
5878  * gtk_icon_view_set_margin:
5879  * @icon_view: a #GtkIconView
5880  * @margin: the margin
5881  *
5882  * Sets the ::margin property which specifies the space
5883  * which is inserted at the top, bottom, left and right
5884  * of the icon view.
5885  *
5886  * Since: 2.6
5887  */
5888 void
5889 gtk_icon_view_set_margin (GtkIconView *icon_view,
5890                           gint         margin)
5891 {
5892   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5893
5894   if (icon_view->priv->margin != margin)
5895     {
5896       icon_view->priv->margin = margin;
5897
5898       if (icon_view->priv->cell_area)
5899         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5900
5901       gtk_icon_view_invalidate_sizes (icon_view);
5902
5903       g_object_notify (G_OBJECT (icon_view), "margin");
5904     }
5905 }
5906
5907 /**
5908  * gtk_icon_view_get_margin:
5909  * @icon_view: a #GtkIconView
5910  *
5911  * Returns the value of the ::margin property.
5912  *
5913  * Return value: the space at the borders
5914  *
5915  * Since: 2.6
5916  */
5917 gint
5918 gtk_icon_view_get_margin (GtkIconView *icon_view)
5919 {
5920   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5921
5922   return icon_view->priv->margin;
5923 }
5924
5925 /**
5926  * gtk_icon_view_set_item_padding:
5927  * @icon_view: a #GtkIconView
5928  * @item_padding: the item padding
5929  *
5930  * Sets the #GtkIconView:item-padding property which specifies the padding
5931  * around each of the icon view's items.
5932  *
5933  * Since: 2.18
5934  */
5935 void
5936 gtk_icon_view_set_item_padding (GtkIconView *icon_view,
5937                                 gint         item_padding)
5938 {
5939   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5940
5941   if (icon_view->priv->item_padding != item_padding)
5942     {
5943       icon_view->priv->item_padding = item_padding;
5944
5945       if (icon_view->priv->cell_area)
5946         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5947
5948       gtk_icon_view_invalidate_sizes (icon_view);
5949
5950       g_object_notify (G_OBJECT (icon_view), "item-padding");
5951     }
5952 }
5953
5954 /**
5955  * gtk_icon_view_get_item_padding:
5956  * @icon_view: a #GtkIconView
5957  *
5958  * Returns the value of the ::item-padding property.
5959  *
5960  * Return value: the padding around items
5961  *
5962  * Since: 2.18
5963  */
5964 gint
5965 gtk_icon_view_get_item_padding (GtkIconView *icon_view)
5966 {
5967   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5968
5969   return icon_view->priv->item_padding;
5970 }
5971
5972 /* Get/set whether drag_motion requested the drag data and
5973  * drag_data_received should thus not actually insert the data,
5974  * since the data doesn't result from a drop.
5975  */
5976 static void
5977 set_status_pending (GdkDragContext *context,
5978                     GdkDragAction   suggested_action)
5979 {
5980   g_object_set_data (G_OBJECT (context),
5981                      I_("gtk-icon-view-status-pending"),
5982                      GINT_TO_POINTER (suggested_action));
5983 }
5984
5985 static GdkDragAction
5986 get_status_pending (GdkDragContext *context)
5987 {
5988   return GPOINTER_TO_INT (g_object_get_data (G_OBJECT (context),
5989                                              "gtk-icon-view-status-pending"));
5990 }
5991
5992 static void
5993 unset_reorderable (GtkIconView *icon_view)
5994 {
5995   if (icon_view->priv->reorderable)
5996     {
5997       icon_view->priv->reorderable = FALSE;
5998       g_object_notify (G_OBJECT (icon_view), "reorderable");
5999     }
6000 }
6001
6002 static void
6003 set_source_row (GdkDragContext *context,
6004                 GtkTreeModel   *model,
6005                 GtkTreePath    *source_row)
6006 {
6007   if (source_row)
6008     g_object_set_data_full (G_OBJECT (context),
6009                             I_("gtk-icon-view-source-row"),
6010                             gtk_tree_row_reference_new (model, source_row),
6011                             (GDestroyNotify) gtk_tree_row_reference_free);
6012   else
6013     g_object_set_data_full (G_OBJECT (context),
6014                             I_("gtk-icon-view-source-row"),
6015                             NULL, NULL);
6016 }
6017
6018 static GtkTreePath*
6019 get_source_row (GdkDragContext *context)
6020 {
6021   GtkTreeRowReference *ref;
6022
6023   ref = g_object_get_data (G_OBJECT (context), "gtk-icon-view-source-row");
6024
6025   if (ref)
6026     return gtk_tree_row_reference_get_path (ref);
6027   else
6028     return NULL;
6029 }
6030
6031 typedef struct
6032 {
6033   GtkTreeRowReference *dest_row;
6034   gboolean             empty_view_drop;
6035   gboolean             drop_append_mode;
6036 } DestRow;
6037
6038 static void
6039 dest_row_free (gpointer data)
6040 {
6041   DestRow *dr = (DestRow *)data;
6042
6043   gtk_tree_row_reference_free (dr->dest_row);
6044   g_free (dr);
6045 }
6046
6047 static void
6048 set_dest_row (GdkDragContext *context,
6049               GtkTreeModel   *model,
6050               GtkTreePath    *dest_row,
6051               gboolean        empty_view_drop,
6052               gboolean        drop_append_mode)
6053 {
6054   DestRow *dr;
6055
6056   if (!dest_row)
6057     {
6058       g_object_set_data_full (G_OBJECT (context),
6059                               I_("gtk-icon-view-dest-row"),
6060                               NULL, NULL);
6061       return;
6062     }
6063
6064   dr = g_new0 (DestRow, 1);
6065
6066   dr->dest_row = gtk_tree_row_reference_new (model, dest_row);
6067   dr->empty_view_drop = empty_view_drop;
6068   dr->drop_append_mode = drop_append_mode;
6069   g_object_set_data_full (G_OBJECT (context),
6070                           I_("gtk-icon-view-dest-row"),
6071                           dr, (GDestroyNotify) dest_row_free);
6072 }
6073
6074 static GtkTreePath*
6075 get_dest_row (GdkDragContext *context)
6076 {
6077   DestRow *dr;
6078
6079   dr = g_object_get_data (G_OBJECT (context), "gtk-icon-view-dest-row");
6080
6081   if (dr)
6082     {
6083       GtkTreePath *path = NULL;
6084
6085       if (dr->dest_row)
6086         path = gtk_tree_row_reference_get_path (dr->dest_row);
6087       else if (dr->empty_view_drop)
6088         path = gtk_tree_path_new_from_indices (0, -1);
6089       else
6090         path = NULL;
6091
6092       if (path && dr->drop_append_mode)
6093         gtk_tree_path_next (path);
6094
6095       return path;
6096     }
6097   else
6098     return NULL;
6099 }
6100
6101 static gboolean
6102 check_model_dnd (GtkTreeModel *model,
6103                  GType         required_iface,
6104                  const gchar  *signal)
6105 {
6106   if (model == NULL || !G_TYPE_CHECK_INSTANCE_TYPE ((model), required_iface))
6107     {
6108       g_warning ("You must override the default '%s' handler "
6109                  "on GtkIconView when using models that don't support "
6110                  "the %s interface and enabling drag-and-drop. The simplest way to do this "
6111                  "is to connect to '%s' and call "
6112                  "g_signal_stop_emission_by_name() in your signal handler to prevent "
6113                  "the default handler from running. Look at the source code "
6114                  "for the default handler in gtkiconview.c to get an idea what "
6115                  "your handler should do. (gtkiconview.c is in the GTK+ source "
6116                  "code.) If you're using GTK+ from a language other than C, "
6117                  "there may be a more natural way to override default handlers, e.g. via derivation.",
6118                  signal, g_type_name (required_iface), signal);
6119       return FALSE;
6120     }
6121   else
6122     return TRUE;
6123 }
6124
6125 static void
6126 remove_scroll_timeout (GtkIconView *icon_view)
6127 {
6128   if (icon_view->priv->scroll_timeout_id != 0)
6129     {
6130       g_source_remove (icon_view->priv->scroll_timeout_id);
6131
6132       icon_view->priv->scroll_timeout_id = 0;
6133     }
6134 }
6135
6136 static void
6137 gtk_icon_view_autoscroll (GtkIconView *icon_view,
6138                           GdkDevice   *device)
6139 {
6140   GdkWindow *window;
6141   gint px, py, width, height;
6142   gint hoffset, voffset;
6143
6144   window = gtk_widget_get_window (GTK_WIDGET (icon_view));
6145
6146   gdk_window_get_device_position (window, device, &px, &py, NULL);
6147   gdk_window_get_geometry (window, NULL, NULL, &width, &height);
6148
6149   /* see if we are near the edge. */
6150   voffset = py - 2 * SCROLL_EDGE_SIZE;
6151   if (voffset > 0)
6152     voffset = MAX (py - (height - 2 * SCROLL_EDGE_SIZE), 0);
6153
6154   hoffset = px - 2 * SCROLL_EDGE_SIZE;
6155   if (hoffset > 0)
6156     hoffset = MAX (px - (width - 2 * SCROLL_EDGE_SIZE), 0);
6157
6158   if (voffset != 0)
6159     gtk_adjustment_set_value (icon_view->priv->vadjustment,
6160                               gtk_adjustment_get_value (icon_view->priv->vadjustment) + voffset);
6161
6162   if (hoffset != 0)
6163     gtk_adjustment_set_value (icon_view->priv->hadjustment,
6164                               gtk_adjustment_get_value (icon_view->priv->hadjustment) + hoffset);
6165 }
6166
6167 typedef struct {
6168   GtkIconView *icon_view;
6169   GdkDevice   *device;
6170 } DragScrollData;
6171
6172 static gboolean
6173 drag_scroll_timeout (gpointer datap)
6174 {
6175   DragScrollData *data = datap;
6176
6177   gtk_icon_view_autoscroll (data->icon_view, data->device);
6178
6179   return TRUE;
6180 }
6181
6182 static void
6183 drag_scroll_data_free (DragScrollData *data)
6184 {
6185   g_slice_free (DragScrollData, data);
6186 }
6187
6188 static gboolean
6189 set_destination (GtkIconView    *icon_view,
6190                  GdkDragContext *context,
6191                  gint            x,
6192                  gint            y,
6193                  GdkDragAction  *suggested_action,
6194                  GdkAtom        *target)
6195 {
6196   GtkWidget *widget;
6197   GtkTreePath *path = NULL;
6198   GtkIconViewDropPosition pos;
6199   GtkIconViewDropPosition old_pos;
6200   GtkTreePath *old_dest_path = NULL;
6201   gboolean can_drop = FALSE;
6202
6203   widget = GTK_WIDGET (icon_view);
6204
6205   *suggested_action = 0;
6206   *target = GDK_NONE;
6207
6208   if (!icon_view->priv->dest_set)
6209     {
6210       /* someone unset us as a drag dest, note that if
6211        * we return FALSE drag_leave isn't called
6212        */
6213
6214       gtk_icon_view_set_drag_dest_item (icon_view,
6215                                         NULL,
6216                                         GTK_ICON_VIEW_DROP_LEFT);
6217
6218       remove_scroll_timeout (GTK_ICON_VIEW (widget));
6219
6220       return FALSE; /* no longer a drop site */
6221     }
6222
6223   *target = gtk_drag_dest_find_target (widget, context,
6224                                        gtk_drag_dest_get_target_list (widget));
6225   if (*target == GDK_NONE)
6226     return FALSE;
6227
6228   if (!gtk_icon_view_get_dest_item_at_pos (icon_view, x, y, &path, &pos))
6229     {
6230       gint n_children;
6231       GtkTreeModel *model;
6232
6233       /* the row got dropped on empty space, let's setup a special case
6234        */
6235
6236       if (path)
6237         gtk_tree_path_free (path);
6238
6239       model = gtk_icon_view_get_model (icon_view);
6240
6241       n_children = gtk_tree_model_iter_n_children (model, NULL);
6242       if (n_children)
6243         {
6244           pos = GTK_ICON_VIEW_DROP_BELOW;
6245           path = gtk_tree_path_new_from_indices (n_children - 1, -1);
6246         }
6247       else
6248         {
6249           pos = GTK_ICON_VIEW_DROP_ABOVE;
6250           path = gtk_tree_path_new_from_indices (0, -1);
6251         }
6252
6253       can_drop = TRUE;
6254
6255       goto out;
6256     }
6257
6258   g_assert (path);
6259
6260   gtk_icon_view_get_drag_dest_item (icon_view,
6261                                     &old_dest_path,
6262                                     &old_pos);
6263
6264   if (old_dest_path)
6265     gtk_tree_path_free (old_dest_path);
6266
6267   if (TRUE /* FIXME if the location droppable predicate */)
6268     {
6269       can_drop = TRUE;
6270     }
6271
6272 out:
6273   if (can_drop)
6274     {
6275       GtkWidget *source_widget;
6276
6277       *suggested_action = gdk_drag_context_get_suggested_action (context);
6278       source_widget = gtk_drag_get_source_widget (context);
6279
6280       if (source_widget == widget)
6281         {
6282           /* Default to MOVE, unless the user has
6283            * pressed ctrl or shift to affect available actions
6284            */
6285           if ((gdk_drag_context_get_actions (context) & GDK_ACTION_MOVE) != 0)
6286             *suggested_action = GDK_ACTION_MOVE;
6287         }
6288
6289       gtk_icon_view_set_drag_dest_item (GTK_ICON_VIEW (widget),
6290                                         path, pos);
6291     }
6292   else
6293     {
6294       /* can't drop here */
6295       gtk_icon_view_set_drag_dest_item (GTK_ICON_VIEW (widget),
6296                                         NULL,
6297                                         GTK_ICON_VIEW_DROP_LEFT);
6298     }
6299
6300   if (path)
6301     gtk_tree_path_free (path);
6302
6303   return TRUE;
6304 }
6305
6306 static GtkTreePath*
6307 get_logical_destination (GtkIconView *icon_view,
6308                          gboolean    *drop_append_mode)
6309 {
6310   /* adjust path to point to the row the drop goes in front of */
6311   GtkTreePath *path = NULL;
6312   GtkIconViewDropPosition pos;
6313
6314   *drop_append_mode = FALSE;
6315
6316   gtk_icon_view_get_drag_dest_item (icon_view, &path, &pos);
6317
6318   if (path == NULL)
6319     return NULL;
6320
6321   if (pos == GTK_ICON_VIEW_DROP_RIGHT ||
6322       pos == GTK_ICON_VIEW_DROP_BELOW)
6323     {
6324       GtkTreeIter iter;
6325       GtkTreeModel *model = icon_view->priv->model;
6326
6327       if (!gtk_tree_model_get_iter (model, &iter, path) ||
6328           !gtk_tree_model_iter_next (model, &iter))
6329         *drop_append_mode = TRUE;
6330       else
6331         {
6332           *drop_append_mode = FALSE;
6333           gtk_tree_path_next (path);
6334         }
6335     }
6336
6337   return path;
6338 }
6339
6340 static gboolean
6341 gtk_icon_view_maybe_begin_drag (GtkIconView    *icon_view,
6342                                 GdkEventMotion *event)
6343 {
6344   GtkWidget *widget = GTK_WIDGET (icon_view);
6345   GdkDragContext *context;
6346   GtkTreePath *path = NULL;
6347   gint button;
6348   GtkTreeModel *model;
6349   gboolean retval = FALSE;
6350
6351   if (!icon_view->priv->source_set)
6352     goto out;
6353
6354   if (icon_view->priv->pressed_button < 0)
6355     goto out;
6356
6357   if (!gtk_drag_check_threshold (GTK_WIDGET (icon_view),
6358                                  icon_view->priv->press_start_x,
6359                                  icon_view->priv->press_start_y,
6360                                  event->x, event->y))
6361     goto out;
6362
6363   model = gtk_icon_view_get_model (icon_view);
6364
6365   if (model == NULL)
6366     goto out;
6367
6368   button = icon_view->priv->pressed_button;
6369   icon_view->priv->pressed_button = -1;
6370
6371   path = gtk_icon_view_get_path_at_pos (icon_view,
6372                                         icon_view->priv->press_start_x,
6373                                         icon_view->priv->press_start_y);
6374
6375   if (path == NULL)
6376     goto out;
6377
6378   if (!GTK_IS_TREE_DRAG_SOURCE (model) ||
6379       !gtk_tree_drag_source_row_draggable (GTK_TREE_DRAG_SOURCE (model),
6380                                            path))
6381     goto out;
6382
6383   /* FIXME Check whether we're a start button, if not return FALSE and
6384    * free path
6385    */
6386
6387   /* Now we can begin the drag */
6388
6389   retval = TRUE;
6390
6391   context = gtk_drag_begin (widget,
6392                             gtk_drag_source_get_target_list (widget),
6393                             icon_view->priv->source_actions,
6394                             button,
6395                             (GdkEvent*)event);
6396
6397   set_source_row (context, model, path);
6398
6399  out:
6400   if (path)
6401     gtk_tree_path_free (path);
6402
6403   return retval;
6404 }
6405
6406 /* Source side drag signals */
6407 static void
6408 gtk_icon_view_drag_begin (GtkWidget      *widget,
6409                           GdkDragContext *context)
6410 {
6411   GtkIconView *icon_view;
6412   GtkIconViewItem *item;
6413   cairo_surface_t *icon;
6414   gint x, y;
6415   GtkTreePath *path;
6416
6417   icon_view = GTK_ICON_VIEW (widget);
6418
6419   /* if the user uses a custom DnD impl, we don't set the icon here */
6420   if (!icon_view->priv->dest_set && !icon_view->priv->source_set)
6421     return;
6422
6423   item = _gtk_icon_view_get_item_at_coords (icon_view,
6424                                            icon_view->priv->press_start_x,
6425                                            icon_view->priv->press_start_y,
6426                                            TRUE,
6427                                            NULL);
6428
6429   g_return_if_fail (item != NULL);
6430
6431   x = icon_view->priv->press_start_x - item->cell_area.x + 1;
6432   y = icon_view->priv->press_start_y - item->cell_area.y + 1;
6433
6434   path = gtk_tree_path_new_from_indices (item->index, -1);
6435   icon = gtk_icon_view_create_drag_icon (icon_view, path);
6436   gtk_tree_path_free (path);
6437
6438   cairo_surface_set_device_offset (icon, -x, -y);
6439
6440   gtk_drag_set_icon_surface (context, icon);
6441
6442   cairo_surface_destroy (icon);
6443 }
6444
6445 static void
6446 gtk_icon_view_drag_end (GtkWidget      *widget,
6447                         GdkDragContext *context)
6448 {
6449   /* do nothing */
6450 }
6451
6452 static void
6453 gtk_icon_view_drag_data_get (GtkWidget        *widget,
6454                              GdkDragContext   *context,
6455                              GtkSelectionData *selection_data,
6456                              guint             info,
6457                              guint             time)
6458 {
6459   GtkIconView *icon_view;
6460   GtkTreeModel *model;
6461   GtkTreePath *source_row;
6462
6463   icon_view = GTK_ICON_VIEW (widget);
6464   model = gtk_icon_view_get_model (icon_view);
6465
6466   if (model == NULL)
6467     return;
6468
6469   if (!icon_view->priv->source_set)
6470     return;
6471
6472   source_row = get_source_row (context);
6473
6474   if (source_row == NULL)
6475     return;
6476
6477   /* We can implement the GTK_TREE_MODEL_ROW target generically for
6478    * any model; for DragSource models there are some other targets
6479    * we also support.
6480    */
6481
6482   if (GTK_IS_TREE_DRAG_SOURCE (model) &&
6483       gtk_tree_drag_source_drag_data_get (GTK_TREE_DRAG_SOURCE (model),
6484                                           source_row,
6485                                           selection_data))
6486     goto done;
6487
6488   /* If drag_data_get does nothing, try providing row data. */
6489   if (gtk_selection_data_get_target (selection_data) == gdk_atom_intern_static_string ("GTK_TREE_MODEL_ROW"))
6490     gtk_tree_set_row_drag_data (selection_data,
6491                                 model,
6492                                 source_row);
6493
6494  done:
6495   gtk_tree_path_free (source_row);
6496 }
6497
6498 static void
6499 gtk_icon_view_drag_data_delete (GtkWidget      *widget,
6500                                 GdkDragContext *context)
6501 {
6502   GtkTreeModel *model;
6503   GtkIconView *icon_view;
6504   GtkTreePath *source_row;
6505
6506   icon_view = GTK_ICON_VIEW (widget);
6507   model = gtk_icon_view_get_model (icon_view);
6508
6509   if (!check_model_dnd (model, GTK_TYPE_TREE_DRAG_SOURCE, "drag-data-delete"))
6510     return;
6511
6512   if (!icon_view->priv->source_set)
6513     return;
6514
6515   source_row = get_source_row (context);
6516
6517   if (source_row == NULL)
6518     return;
6519
6520   gtk_tree_drag_source_drag_data_delete (GTK_TREE_DRAG_SOURCE (model),
6521                                          source_row);
6522
6523   gtk_tree_path_free (source_row);
6524
6525   set_source_row (context, NULL, NULL);
6526 }
6527
6528 /* Target side drag signals */
6529 static void
6530 gtk_icon_view_drag_leave (GtkWidget      *widget,
6531                           GdkDragContext *context,
6532                           guint           time)
6533 {
6534   GtkIconView *icon_view;
6535
6536   icon_view = GTK_ICON_VIEW (widget);
6537
6538   /* unset any highlight row */
6539   gtk_icon_view_set_drag_dest_item (icon_view,
6540                                     NULL,
6541                                     GTK_ICON_VIEW_DROP_LEFT);
6542
6543   remove_scroll_timeout (icon_view);
6544 }
6545
6546 static gboolean
6547 gtk_icon_view_drag_motion (GtkWidget      *widget,
6548                            GdkDragContext *context,
6549                            gint            x,
6550                            gint            y,
6551                            guint           time)
6552 {
6553   GtkTreePath *path = NULL;
6554   GtkIconViewDropPosition pos;
6555   GtkIconView *icon_view;
6556   GdkDragAction suggested_action = 0;
6557   GdkAtom target;
6558   gboolean empty;
6559
6560   icon_view = GTK_ICON_VIEW (widget);
6561
6562   if (!set_destination (icon_view, context, x, y, &suggested_action, &target))
6563     return FALSE;
6564
6565   gtk_icon_view_get_drag_dest_item (icon_view, &path, &pos);
6566
6567   /* we only know this *after* set_desination_row */
6568   empty = icon_view->priv->empty_view_drop;
6569
6570   if (path == NULL && !empty)
6571     {
6572       /* Can't drop here. */
6573       gdk_drag_status (context, 0, time);
6574     }
6575   else
6576     {
6577       if (icon_view->priv->scroll_timeout_id == 0)
6578         {
6579           DragScrollData *data = g_slice_new (DragScrollData);
6580           data->icon_view = icon_view;
6581           data->device = gdk_drag_context_get_device (context);
6582
6583           icon_view->priv->scroll_timeout_id =
6584             gdk_threads_add_timeout_full (G_PRIORITY_DEFAULT, 50, drag_scroll_timeout, data, (GDestroyNotify) drag_scroll_data_free);
6585         }
6586
6587       if (target == gdk_atom_intern_static_string ("GTK_TREE_MODEL_ROW"))
6588         {
6589           /* Request data so we can use the source row when
6590            * determining whether to accept the drop
6591            */
6592           set_status_pending (context, suggested_action);
6593           gtk_drag_get_data (widget, context, target, time);
6594         }
6595       else
6596         {
6597           set_status_pending (context, 0);
6598           gdk_drag_status (context, suggested_action, time);
6599         }
6600     }
6601
6602   if (path)
6603     gtk_tree_path_free (path);
6604
6605   return TRUE;
6606 }
6607
6608 static gboolean
6609 gtk_icon_view_drag_drop (GtkWidget      *widget,
6610                          GdkDragContext *context,
6611                          gint            x,
6612                          gint            y,
6613                          guint           time)
6614 {
6615   GtkIconView *icon_view;
6616   GtkTreePath *path;
6617   GdkDragAction suggested_action = 0;
6618   GdkAtom target = GDK_NONE;
6619   GtkTreeModel *model;
6620   gboolean drop_append_mode;
6621
6622   icon_view = GTK_ICON_VIEW (widget);
6623   model = gtk_icon_view_get_model (icon_view);
6624
6625   remove_scroll_timeout (GTK_ICON_VIEW (widget));
6626
6627   if (!icon_view->priv->dest_set)
6628     return FALSE;
6629
6630   if (!check_model_dnd (model, GTK_TYPE_TREE_DRAG_DEST, "drag-drop"))
6631     return FALSE;
6632
6633   if (!set_destination (icon_view, context, x, y, &suggested_action, &target))
6634     return FALSE;
6635
6636   path = get_logical_destination (icon_view, &drop_append_mode);
6637
6638   if (target != GDK_NONE && path != NULL)
6639     {
6640       /* in case a motion had requested drag data, change things so we
6641        * treat drag data receives as a drop.
6642        */
6643       set_status_pending (context, 0);
6644       set_dest_row (context, model, path,
6645                     icon_view->priv->empty_view_drop, drop_append_mode);
6646     }
6647
6648   if (path)
6649     gtk_tree_path_free (path);
6650
6651   /* Unset this thing */
6652   gtk_icon_view_set_drag_dest_item (icon_view, NULL, GTK_ICON_VIEW_DROP_LEFT);
6653
6654   if (target != GDK_NONE)
6655     {
6656       gtk_drag_get_data (widget, context, target, time);
6657       return TRUE;
6658     }
6659   else
6660     return FALSE;
6661 }
6662
6663 static void
6664 gtk_icon_view_drag_data_received (GtkWidget        *widget,
6665                                   GdkDragContext   *context,
6666                                   gint              x,
6667                                   gint              y,
6668                                   GtkSelectionData *selection_data,
6669                                   guint             info,
6670                                   guint             time)
6671 {
6672   GtkTreePath *path;
6673   gboolean accepted = FALSE;
6674   GtkTreeModel *model;
6675   GtkIconView *icon_view;
6676   GtkTreePath *dest_row;
6677   GdkDragAction suggested_action;
6678   gboolean drop_append_mode;
6679
6680   icon_view = GTK_ICON_VIEW (widget);
6681   model = gtk_icon_view_get_model (icon_view);
6682
6683   if (!check_model_dnd (model, GTK_TYPE_TREE_DRAG_DEST, "drag-data-received"))
6684     return;
6685
6686   if (!icon_view->priv->dest_set)
6687     return;
6688
6689   suggested_action = get_status_pending (context);
6690
6691   if (suggested_action)
6692     {
6693       /* We are getting this data due to a request in drag_motion,
6694        * rather than due to a request in drag_drop, so we are just
6695        * supposed to call drag_status, not actually paste in the
6696        * data.
6697        */
6698       path = get_logical_destination (icon_view, &drop_append_mode);
6699
6700       if (path == NULL)
6701         suggested_action = 0;
6702
6703       if (suggested_action)
6704         {
6705           if (!gtk_tree_drag_dest_row_drop_possible (GTK_TREE_DRAG_DEST (model),
6706                                                      path,
6707                                                      selection_data))
6708             suggested_action = 0;
6709         }
6710
6711       gdk_drag_status (context, suggested_action, time);
6712
6713       if (path)
6714         gtk_tree_path_free (path);
6715
6716       /* If you can't drop, remove user drop indicator until the next motion */
6717       if (suggested_action == 0)
6718         gtk_icon_view_set_drag_dest_item (icon_view,
6719                                           NULL,
6720                                           GTK_ICON_VIEW_DROP_LEFT);
6721       return;
6722     }
6723
6724
6725   dest_row = get_dest_row (context);
6726
6727   if (dest_row == NULL)
6728     return;
6729
6730   if (gtk_selection_data_get_length (selection_data) >= 0)
6731     {
6732       if (gtk_tree_drag_dest_drag_data_received (GTK_TREE_DRAG_DEST (model),
6733                                                  dest_row,
6734                                                  selection_data))
6735         accepted = TRUE;
6736     }
6737
6738   gtk_drag_finish (context,
6739                    accepted,
6740                    (gdk_drag_context_get_selected_action (context) == GDK_ACTION_MOVE),
6741                    time);
6742
6743   gtk_tree_path_free (dest_row);
6744
6745   /* drop dest_row */
6746   set_dest_row (context, NULL, NULL, FALSE, FALSE);
6747 }
6748
6749 /* Drag-and-Drop support */
6750 /**
6751  * gtk_icon_view_enable_model_drag_source:
6752  * @icon_view: a #GtkIconView
6753  * @start_button_mask: Mask of allowed buttons to start drag
6754  * @targets: (array length=n_targets): the table of targets that the drag will
6755  *           support
6756  * @n_targets: the number of items in @targets
6757  * @actions: the bitmask of possible actions for a drag from this
6758  *    widget
6759  *
6760  * Turns @icon_view into a drag source for automatic DND. Calling this
6761  * method sets #GtkIconView:reorderable to %FALSE.
6762  *
6763  * Since: 2.8
6764  **/
6765 void
6766 gtk_icon_view_enable_model_drag_source (GtkIconView              *icon_view,
6767                                         GdkModifierType           start_button_mask,
6768                                         const GtkTargetEntry     *targets,
6769                                         gint                      n_targets,
6770                                         GdkDragAction             actions)
6771 {
6772   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
6773
6774   gtk_drag_source_set (GTK_WIDGET (icon_view), 0, targets, n_targets, actions);
6775
6776   icon_view->priv->start_button_mask = start_button_mask;
6777   icon_view->priv->source_actions = actions;
6778
6779   icon_view->priv->source_set = TRUE;
6780
6781   unset_reorderable (icon_view);
6782 }
6783
6784 /**
6785  * gtk_icon_view_enable_model_drag_dest:
6786  * @icon_view: a #GtkIconView
6787  * @targets: (array length=n_targets): the table of targets that the drag will
6788  *           support
6789  * @n_targets: the number of items in @targets
6790  * @actions: the bitmask of possible actions for a drag to this
6791  *    widget
6792  *
6793  * Turns @icon_view into a drop destination for automatic DND. Calling this
6794  * method sets #GtkIconView:reorderable to %FALSE.
6795  *
6796  * Since: 2.8
6797  **/
6798 void
6799 gtk_icon_view_enable_model_drag_dest (GtkIconView          *icon_view,
6800                                       const GtkTargetEntry *targets,
6801                                       gint                  n_targets,
6802                                       GdkDragAction         actions)
6803 {
6804   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
6805
6806   gtk_drag_dest_set (GTK_WIDGET (icon_view), 0, targets, n_targets, actions);
6807
6808   icon_view->priv->dest_actions = actions;
6809
6810   icon_view->priv->dest_set = TRUE;
6811
6812   unset_reorderable (icon_view);
6813 }
6814
6815 /**
6816  * gtk_icon_view_unset_model_drag_source:
6817  * @icon_view: a #GtkIconView
6818  *
6819  * Undoes the effect of gtk_icon_view_enable_model_drag_source(). Calling this
6820  * method sets #GtkIconView:reorderable to %FALSE.
6821  *
6822  * Since: 2.8
6823  **/
6824 void
6825 gtk_icon_view_unset_model_drag_source (GtkIconView *icon_view)
6826 {
6827   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
6828
6829   if (icon_view->priv->source_set)
6830     {
6831       gtk_drag_source_unset (GTK_WIDGET (icon_view));
6832       icon_view->priv->source_set = FALSE;
6833     }
6834
6835   unset_reorderable (icon_view);
6836 }
6837
6838 /**
6839  * gtk_icon_view_unset_model_drag_dest:
6840  * @icon_view: a #GtkIconView
6841  *
6842  * Undoes the effect of gtk_icon_view_enable_model_drag_dest(). Calling this
6843  * method sets #GtkIconView:reorderable to %FALSE.
6844  *
6845  * Since: 2.8
6846  **/
6847 void
6848 gtk_icon_view_unset_model_drag_dest (GtkIconView *icon_view)
6849 {
6850   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
6851
6852   if (icon_view->priv->dest_set)
6853     {
6854       gtk_drag_dest_unset (GTK_WIDGET (icon_view));
6855       icon_view->priv->dest_set = FALSE;
6856     }
6857
6858   unset_reorderable (icon_view);
6859 }
6860
6861 /* These are useful to implement your own custom stuff. */
6862 /**
6863  * gtk_icon_view_set_drag_dest_item:
6864  * @icon_view: a #GtkIconView
6865  * @path: (allow-none): The path of the item to highlight, or %NULL.
6866  * @pos: Specifies where to drop, relative to the item
6867  *
6868  * Sets the item that is highlighted for feedback.
6869  *
6870  * Since: 2.8
6871  */
6872 void
6873 gtk_icon_view_set_drag_dest_item (GtkIconView              *icon_view,
6874                                   GtkTreePath              *path,
6875                                   GtkIconViewDropPosition   pos)
6876 {
6877   /* Note; this function is exported to allow a custom DND
6878    * implementation, so it can't touch TreeViewDragInfo
6879    */
6880
6881   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
6882
6883   if (icon_view->priv->dest_item)
6884     {
6885       GtkTreePath *current_path;
6886       current_path = gtk_tree_row_reference_get_path (icon_view->priv->dest_item);
6887       gtk_tree_row_reference_free (icon_view->priv->dest_item);
6888       icon_view->priv->dest_item = NULL;
6889
6890       gtk_icon_view_queue_draw_path (icon_view, current_path);
6891       gtk_tree_path_free (current_path);
6892     }
6893
6894   /* special case a drop on an empty model */
6895   icon_view->priv->empty_view_drop = FALSE;
6896   if (pos == GTK_ICON_VIEW_DROP_ABOVE && path
6897       && gtk_tree_path_get_depth (path) == 1
6898       && gtk_tree_path_get_indices (path)[0] == 0)
6899     {
6900       gint n_children;
6901
6902       n_children = gtk_tree_model_iter_n_children (icon_view->priv->model,
6903                                                    NULL);
6904
6905       if (n_children == 0)
6906         icon_view->priv->empty_view_drop = TRUE;
6907     }
6908
6909   icon_view->priv->dest_pos = pos;
6910
6911   if (path)
6912     {
6913       icon_view->priv->dest_item =
6914         gtk_tree_row_reference_new_proxy (G_OBJECT (icon_view),
6915                                           icon_view->priv->model, path);
6916
6917       gtk_icon_view_queue_draw_path (icon_view, path);
6918     }
6919 }
6920
6921 /**
6922  * gtk_icon_view_get_drag_dest_item:
6923  * @icon_view: a #GtkIconView
6924  * @path: (out) (allow-none): Return location for the path of
6925  *        the highlighted item, or %NULL.
6926  * @pos: (out) (allow-none): Return location for the drop position, or %NULL
6927  *
6928  * Gets information about the item that is highlighted for feedback.
6929  *
6930  * Since: 2.8
6931  **/
6932 void
6933 gtk_icon_view_get_drag_dest_item (GtkIconView              *icon_view,
6934                                   GtkTreePath             **path,
6935                                   GtkIconViewDropPosition  *pos)
6936 {
6937   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
6938
6939   if (path)
6940     {
6941       if (icon_view->priv->dest_item)
6942         *path = gtk_tree_row_reference_get_path (icon_view->priv->dest_item);
6943       else
6944         *path = NULL;
6945     }
6946
6947   if (pos)
6948     *pos = icon_view->priv->dest_pos;
6949 }
6950
6951 /**
6952  * gtk_icon_view_get_dest_item_at_pos:
6953  * @icon_view: a #GtkIconView
6954  * @drag_x: the position to determine the destination item for
6955  * @drag_y: the position to determine the destination item for
6956  * @path: (out) (allow-none): Return location for the path of the item,
6957  *    or %NULL.
6958  * @pos: (out) (allow-none): Return location for the drop position, or %NULL
6959  *
6960  * Determines the destination item for a given position.
6961  *
6962  * Return value: whether there is an item at the given position.
6963  *
6964  * Since: 2.8
6965  **/
6966 gboolean
6967 gtk_icon_view_get_dest_item_at_pos (GtkIconView              *icon_view,
6968                                     gint                      drag_x,
6969                                     gint                      drag_y,
6970                                     GtkTreePath             **path,
6971                                     GtkIconViewDropPosition  *pos)
6972 {
6973   GtkIconViewItem *item;
6974
6975   /* Note; this function is exported to allow a custom DND
6976    * implementation, so it can't touch TreeViewDragInfo
6977    */
6978
6979   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
6980   g_return_val_if_fail (drag_x >= 0, FALSE);
6981   g_return_val_if_fail (drag_y >= 0, FALSE);
6982   g_return_val_if_fail (icon_view->priv->bin_window != NULL, FALSE);
6983
6984
6985   if (path)
6986     *path = NULL;
6987
6988   item = _gtk_icon_view_get_item_at_coords (icon_view,
6989                                            drag_x + gtk_adjustment_get_value (icon_view->priv->hadjustment),
6990                                            drag_y + gtk_adjustment_get_value (icon_view->priv->vadjustment),
6991                                            FALSE, NULL);
6992
6993   if (item == NULL)
6994     return FALSE;
6995
6996   if (path)
6997     *path = gtk_tree_path_new_from_indices (item->index, -1);
6998
6999   if (pos)
7000     {
7001       if (drag_x < item->cell_area.x + item->cell_area.width / 4)
7002         *pos = GTK_ICON_VIEW_DROP_LEFT;
7003       else if (drag_x > item->cell_area.x + item->cell_area.width * 3 / 4)
7004         *pos = GTK_ICON_VIEW_DROP_RIGHT;
7005       else if (drag_y < item->cell_area.y + item->cell_area.height / 4)
7006         *pos = GTK_ICON_VIEW_DROP_ABOVE;
7007       else if (drag_y > item->cell_area.y + item->cell_area.height * 3 / 4)
7008         *pos = GTK_ICON_VIEW_DROP_BELOW;
7009       else
7010         *pos = GTK_ICON_VIEW_DROP_INTO;
7011     }
7012
7013   return TRUE;
7014 }
7015
7016 /**
7017  * gtk_icon_view_create_drag_icon:
7018  * @icon_view: a #GtkIconView
7019  * @path: a #GtkTreePath in @icon_view
7020  *
7021  * Creates a #cairo_surface_t representation of the item at @path.
7022  * This image is used for a drag icon.
7023  *
7024  * Return value: (transfer full): a newly-allocated surface of the drag icon.
7025  *
7026  * Since: 2.8
7027  **/
7028 cairo_surface_t *
7029 gtk_icon_view_create_drag_icon (GtkIconView *icon_view,
7030                                 GtkTreePath *path)
7031 {
7032   GtkWidget *widget;
7033   GtkStyleContext *context;
7034   cairo_t *cr;
7035   cairo_surface_t *surface;
7036   GList *l;
7037   gint index;
7038
7039   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), NULL);
7040   g_return_val_if_fail (path != NULL, NULL);
7041
7042   widget = GTK_WIDGET (icon_view);
7043   context = gtk_widget_get_style_context (widget);
7044
7045   if (!gtk_widget_get_realized (widget))
7046     return NULL;
7047
7048   index = gtk_tree_path_get_indices (path)[0];
7049
7050   for (l = icon_view->priv->items; l; l = l->next)
7051     {
7052       GtkIconViewItem *item = l->data;
7053
7054       if (index == item->index)
7055         {
7056           GdkRectangle rect = {
7057             item->cell_area.x - icon_view->priv->item_padding,
7058             item->cell_area.y - icon_view->priv->item_padding,
7059             item->cell_area.width  + icon_view->priv->item_padding * 2,
7060             item->cell_area.height + icon_view->priv->item_padding * 2
7061           };
7062
7063           surface = gdk_window_create_similar_surface (icon_view->priv->bin_window,
7064                                                        CAIRO_CONTENT_COLOR,
7065                                                        rect.width + 2,
7066                                                        rect.height + 2);
7067
7068           cr = cairo_create (surface);
7069           cairo_set_line_width (cr, 1.);
7070
7071           gtk_render_background (context, cr, 0, 0,
7072                                  rect.width + 2, rect.height + 2);
7073
7074           cairo_save (cr);
7075
7076           cairo_rectangle (cr, 1, 1, rect.width, rect.height);
7077           cairo_clip (cr);
7078
7079           gtk_icon_view_paint_item (icon_view, cr, item,
7080                                     icon_view->priv->item_padding + 1,
7081                                     icon_view->priv->item_padding + 1, FALSE);
7082
7083           cairo_restore (cr);
7084
7085           cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
7086           cairo_rectangle (cr, 0.5, 0.5, rect.width + 1, rect.height + 1);
7087           cairo_stroke (cr);
7088
7089           cairo_destroy (cr);
7090
7091           return surface;
7092         }
7093     }
7094
7095   return NULL;
7096 }
7097
7098 /**
7099  * gtk_icon_view_get_reorderable:
7100  * @icon_view: a #GtkIconView
7101  *
7102  * Retrieves whether the user can reorder the list via drag-and-drop.
7103  * See gtk_icon_view_set_reorderable().
7104  *
7105  * Return value: %TRUE if the list can be reordered.
7106  *
7107  * Since: 2.8
7108  **/
7109 gboolean
7110 gtk_icon_view_get_reorderable (GtkIconView *icon_view)
7111 {
7112   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
7113
7114   return icon_view->priv->reorderable;
7115 }
7116
7117 static const GtkTargetEntry item_targets[] = {
7118   { "GTK_TREE_MODEL_ROW", GTK_TARGET_SAME_WIDGET, 0 }
7119 };
7120
7121
7122 /**
7123  * gtk_icon_view_set_reorderable:
7124  * @icon_view: A #GtkIconView.
7125  * @reorderable: %TRUE, if the list of items can be reordered.
7126  *
7127  * This function is a convenience function to allow you to reorder models that
7128  * support the #GtkTreeDragSourceIface and the #GtkTreeDragDestIface.  Both
7129  * #GtkTreeStore and #GtkListStore support these.  If @reorderable is %TRUE, then
7130  * the user can reorder the model by dragging and dropping rows.  The
7131  * developer can listen to these changes by connecting to the model's
7132  * row_inserted and row_deleted signals. The reordering is implemented by setting up
7133  * the icon view as a drag source and destination. Therefore, drag and
7134  * drop can not be used in a reorderable view for any other purpose.
7135  *
7136  * This function does not give you any degree of control over the order -- any
7137  * reordering is allowed.  If more control is needed, you should probably
7138  * handle drag and drop manually.
7139  *
7140  * Since: 2.8
7141  **/
7142 void
7143 gtk_icon_view_set_reorderable (GtkIconView *icon_view,
7144                                gboolean     reorderable)
7145 {
7146   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
7147
7148   reorderable = reorderable != FALSE;
7149
7150   if (icon_view->priv->reorderable == reorderable)
7151     return;
7152
7153   if (reorderable)
7154     {
7155       gtk_icon_view_enable_model_drag_source (icon_view,
7156                                               GDK_BUTTON1_MASK,
7157                                               item_targets,
7158                                               G_N_ELEMENTS (item_targets),
7159                                               GDK_ACTION_MOVE);
7160       gtk_icon_view_enable_model_drag_dest (icon_view,
7161                                             item_targets,
7162                                             G_N_ELEMENTS (item_targets),
7163                                             GDK_ACTION_MOVE);
7164     }
7165   else
7166     {
7167       gtk_icon_view_unset_model_drag_source (icon_view);
7168       gtk_icon_view_unset_model_drag_dest (icon_view);
7169     }
7170
7171   icon_view->priv->reorderable = reorderable;
7172
7173   g_object_notify (G_OBJECT (icon_view), "reorderable");
7174 }
7175
7176 static gboolean
7177 gtk_icon_view_buildable_custom_tag_start (GtkBuildable  *buildable,
7178                                           GtkBuilder    *builder,
7179                                           GObject       *child,
7180                                           const gchar   *tagname,
7181                                           GMarkupParser *parser,
7182                                           gpointer      *data)
7183 {
7184   if (parent_buildable_iface->custom_tag_start (buildable, builder, child,
7185                                                 tagname, parser, data))
7186     return TRUE;
7187
7188   return _gtk_cell_layout_buildable_custom_tag_start (buildable, builder, child,
7189                                                       tagname, parser, data);
7190 }
7191
7192 static void
7193 gtk_icon_view_buildable_custom_tag_end (GtkBuildable *buildable,
7194                                         GtkBuilder   *builder,
7195                                         GObject      *child,
7196                                         const gchar  *tagname,
7197                                         gpointer     *data)
7198 {
7199   if (!_gtk_cell_layout_buildable_custom_tag_end (buildable, builder,
7200                                                   child, tagname, data))
7201     parent_buildable_iface->custom_tag_end (buildable, builder,
7202                                             child, tagname, data);
7203 }