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_set_tooltip_item:
4455  * @icon_view: a #GtkIconView
4456  * @tooltip: a #GtkTooltip
4457  * @path: a #GtkTreePath
4458  *
4459  * Sets the tip area of @tooltip to be the area covered by the item at @path.
4460  * See also gtk_icon_view_set_tooltip_column() for a simpler alternative.
4461  * See also gtk_tooltip_set_tip_area().
4462  *
4463  * Since: 2.12
4464  */
4465 void
4466 gtk_icon_view_set_tooltip_item (GtkIconView     *icon_view,
4467                                 GtkTooltip      *tooltip,
4468                                 GtkTreePath     *path)
4469 {
4470   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4471   g_return_if_fail (GTK_IS_TOOLTIP (tooltip));
4472
4473   gtk_icon_view_set_tooltip_cell (icon_view, tooltip, path, NULL);
4474 }
4475
4476 /**
4477  * gtk_icon_view_set_tooltip_cell:
4478  * @icon_view: a #GtkIconView
4479  * @tooltip: a #GtkTooltip
4480  * @path: a #GtkTreePath
4481  * @cell: (allow-none): a #GtkCellRenderer or %NULL
4482  *
4483  * Sets the tip area of @tooltip to the area which @cell occupies in
4484  * the item pointed to by @path. See also gtk_tooltip_set_tip_area().
4485  *
4486  * See also gtk_icon_view_set_tooltip_column() for a simpler alternative.
4487  *
4488  * Since: 2.12
4489  */
4490 void
4491 gtk_icon_view_set_tooltip_cell (GtkIconView     *icon_view,
4492                                 GtkTooltip      *tooltip,
4493                                 GtkTreePath     *path,
4494                                 GtkCellRenderer *cell)
4495 {
4496   GdkRectangle rect;
4497   GtkIconViewItem *item = NULL;
4498   gint x, y;
4499
4500   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4501   g_return_if_fail (GTK_IS_TOOLTIP (tooltip));
4502   g_return_if_fail (cell == NULL || GTK_IS_CELL_RENDERER (cell));
4503
4504   if (gtk_tree_path_get_depth (path) > 0)
4505     item = g_list_nth_data (icon_view->priv->items,
4506                             gtk_tree_path_get_indices(path)[0]);
4507
4508   if (!item)
4509     return;
4510
4511   if (cell)
4512     {
4513       GtkCellAreaContext *context;
4514
4515       context = g_ptr_array_index (icon_view->priv->row_contexts, item->row);
4516       _gtk_icon_view_set_cell_data (icon_view, item);
4517       gtk_cell_area_get_cell_allocation (icon_view->priv->cell_area, context,
4518                                          GTK_WIDGET (icon_view),
4519                                          cell, &item->cell_area, &rect);
4520     }
4521   else
4522     {
4523       rect.x = item->cell_area.x - icon_view->priv->item_padding;
4524       rect.y = item->cell_area.y - icon_view->priv->item_padding;
4525       rect.width  = item->cell_area.width  + icon_view->priv->item_padding * 2;
4526       rect.height = item->cell_area.height + icon_view->priv->item_padding * 2;
4527     }
4528
4529   if (icon_view->priv->bin_window)
4530     {
4531       gdk_window_get_position (icon_view->priv->bin_window, &x, &y);
4532       rect.x += x;
4533       rect.y += y;
4534     }
4535
4536   gtk_tooltip_set_tip_area (tooltip, &rect);
4537 }
4538
4539
4540 /**
4541  * gtk_icon_view_get_tooltip_context:
4542  * @icon_view: an #GtkIconView
4543  * @x: (inout): the x coordinate (relative to widget coordinates)
4544  * @y: (inout): the y coordinate (relative to widget coordinates)
4545  * @keyboard_tip: whether this is a keyboard tooltip or not
4546  * @model: (out) (allow-none): a pointer to receive a #GtkTreeModel or %NULL
4547  * @path: (out) (allow-none): a pointer to receive a #GtkTreePath or %NULL
4548  * @iter: (out) (allow-none): a pointer to receive a #GtkTreeIter or %NULL
4549  *
4550  * This function is supposed to be used in a #GtkWidget::query-tooltip
4551  * signal handler for #GtkIconView.  The @x, @y and @keyboard_tip values
4552  * which are received in the signal handler, should be passed to this
4553  * function without modification.
4554  *
4555  * The return value indicates whether there is an icon view item at the given
4556  * coordinates (%TRUE) or not (%FALSE) for mouse tooltips. For keyboard
4557  * tooltips the item returned will be the cursor item. When %TRUE, then any of
4558  * @model, @path and @iter which have been provided will be set to point to
4559  * that row and the corresponding model. @x and @y will always be converted
4560  * to be relative to @icon_view's bin_window if @keyboard_tooltip is %FALSE.
4561  *
4562  * Return value: whether or not the given tooltip context points to a item
4563  *
4564  * Since: 2.12
4565  */
4566 gboolean
4567 gtk_icon_view_get_tooltip_context (GtkIconView   *icon_view,
4568                                    gint          *x,
4569                                    gint          *y,
4570                                    gboolean       keyboard_tip,
4571                                    GtkTreeModel **model,
4572                                    GtkTreePath  **path,
4573                                    GtkTreeIter   *iter)
4574 {
4575   GtkTreePath *tmppath = NULL;
4576
4577   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
4578   g_return_val_if_fail (x != NULL, FALSE);
4579   g_return_val_if_fail (y != NULL, FALSE);
4580
4581   if (keyboard_tip)
4582     {
4583       gtk_icon_view_get_cursor (icon_view, &tmppath, NULL);
4584
4585       if (!tmppath)
4586         return FALSE;
4587     }
4588   else
4589     {
4590       gtk_icon_view_convert_widget_to_bin_window_coords (icon_view, *x, *y,
4591                                                          x, y);
4592
4593       if (!gtk_icon_view_get_item_at_pos (icon_view, *x, *y, &tmppath, NULL))
4594         return FALSE;
4595     }
4596
4597   if (model)
4598     *model = gtk_icon_view_get_model (icon_view);
4599
4600   if (iter)
4601     gtk_tree_model_get_iter (gtk_icon_view_get_model (icon_view),
4602                              iter, tmppath);
4603
4604   if (path)
4605     *path = tmppath;
4606   else
4607     gtk_tree_path_free (tmppath);
4608
4609   return TRUE;
4610 }
4611
4612 static gboolean
4613 gtk_icon_view_set_tooltip_query_cb (GtkWidget  *widget,
4614                                     gint        x,
4615                                     gint        y,
4616                                     gboolean    keyboard_tip,
4617                                     GtkTooltip *tooltip,
4618                                     gpointer    data)
4619 {
4620   gchar *str;
4621   GtkTreeIter iter;
4622   GtkTreePath *path;
4623   GtkTreeModel *model;
4624   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
4625
4626   if (!gtk_icon_view_get_tooltip_context (GTK_ICON_VIEW (widget),
4627                                           &x, &y,
4628                                           keyboard_tip,
4629                                           &model, &path, &iter))
4630     return FALSE;
4631
4632   gtk_tree_model_get (model, &iter, icon_view->priv->tooltip_column, &str, -1);
4633
4634   if (!str)
4635     {
4636       gtk_tree_path_free (path);
4637       return FALSE;
4638     }
4639
4640   gtk_tooltip_set_markup (tooltip, str);
4641   gtk_icon_view_set_tooltip_item (icon_view, tooltip, path);
4642
4643   gtk_tree_path_free (path);
4644   g_free (str);
4645
4646   return TRUE;
4647 }
4648
4649
4650 /**
4651  * gtk_icon_view_set_tooltip_column:
4652  * @icon_view: a #GtkIconView
4653  * @column: an integer, which is a valid column number for @icon_view's model
4654  *
4655  * If you only plan to have simple (text-only) tooltips on full items, you
4656  * can use this function to have #GtkIconView handle these automatically
4657  * for you. @column should be set to the column in @icon_view's model
4658  * containing the tooltip texts, or -1 to disable this feature.
4659  *
4660  * When enabled, #GtkWidget:has-tooltip will be set to %TRUE and
4661  * @icon_view will connect a #GtkWidget::query-tooltip signal handler.
4662  *
4663  * Note that the signal handler sets the text with gtk_tooltip_set_markup(),
4664  * so &amp;, &lt;, etc have to be escaped in the text.
4665  *
4666  * Since: 2.12
4667  */
4668 void
4669 gtk_icon_view_set_tooltip_column (GtkIconView *icon_view,
4670                                   gint         column)
4671 {
4672   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4673
4674   if (column == icon_view->priv->tooltip_column)
4675     return;
4676
4677   if (column == -1)
4678     {
4679       g_signal_handlers_disconnect_by_func (icon_view,
4680                                             gtk_icon_view_set_tooltip_query_cb,
4681                                             NULL);
4682       gtk_widget_set_has_tooltip (GTK_WIDGET (icon_view), FALSE);
4683     }
4684   else
4685     {
4686       if (icon_view->priv->tooltip_column == -1)
4687         {
4688           g_signal_connect (icon_view, "query-tooltip",
4689                             G_CALLBACK (gtk_icon_view_set_tooltip_query_cb), NULL);
4690           gtk_widget_set_has_tooltip (GTK_WIDGET (icon_view), TRUE);
4691         }
4692     }
4693
4694   icon_view->priv->tooltip_column = column;
4695   g_object_notify (G_OBJECT (icon_view), "tooltip-column");
4696 }
4697
4698 /**
4699  * gtk_icon_view_get_tooltip_column:
4700  * @icon_view: a #GtkIconView
4701  *
4702  * Returns the column of @icon_view's model which is being used for
4703  * displaying tooltips on @icon_view's rows.
4704  *
4705  * Return value: the index of the tooltip column that is currently being
4706  * used, or -1 if this is disabled.
4707  *
4708  * Since: 2.12
4709  */
4710 gint
4711 gtk_icon_view_get_tooltip_column (GtkIconView *icon_view)
4712 {
4713   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), 0);
4714
4715   return icon_view->priv->tooltip_column;
4716 }
4717
4718 /**
4719  * gtk_icon_view_get_visible_range:
4720  * @icon_view: A #GtkIconView
4721  * @start_path: (out) (allow-none): Return location for start of region,
4722  *              or %NULL
4723  * @end_path: (out) (allow-none): Return location for end of region, or %NULL
4724  *
4725  * Sets @start_path and @end_path to be the first and last visible path.
4726  * Note that there may be invisible paths in between.
4727  *
4728  * Both paths should be freed with gtk_tree_path_free() after use.
4729  *
4730  * Return value: %TRUE, if valid paths were placed in @start_path and @end_path
4731  *
4732  * Since: 2.8
4733  **/
4734 gboolean
4735 gtk_icon_view_get_visible_range (GtkIconView  *icon_view,
4736                                  GtkTreePath **start_path,
4737                                  GtkTreePath **end_path)
4738 {
4739   gint start_index = -1;
4740   gint end_index = -1;
4741   GList *icons;
4742
4743   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
4744
4745   if (icon_view->priv->hadjustment == NULL ||
4746       icon_view->priv->vadjustment == NULL)
4747     return FALSE;
4748
4749   if (start_path == NULL && end_path == NULL)
4750     return FALSE;
4751
4752   for (icons = icon_view->priv->items; icons; icons = icons->next)
4753     {
4754       GtkIconViewItem *item = icons->data;
4755       GdkRectangle    *item_area = &item->cell_area;
4756
4757       if ((item_area->x + item_area->width >= (int)gtk_adjustment_get_value (icon_view->priv->hadjustment)) &&
4758           (item_area->y + item_area->height >= (int)gtk_adjustment_get_value (icon_view->priv->vadjustment)) &&
4759           (item_area->x <=
4760            (int) (gtk_adjustment_get_value (icon_view->priv->hadjustment) +
4761                   gtk_adjustment_get_page_size (icon_view->priv->hadjustment))) &&
4762           (item_area->y <=
4763            (int) (gtk_adjustment_get_value (icon_view->priv->vadjustment) +
4764                   gtk_adjustment_get_page_size (icon_view->priv->vadjustment))))
4765         {
4766           if (start_index == -1)
4767             start_index = item->index;
4768           end_index = item->index;
4769         }
4770     }
4771
4772   if (start_path && start_index != -1)
4773     *start_path = gtk_tree_path_new_from_indices (start_index, -1);
4774   if (end_path && end_index != -1)
4775     *end_path = gtk_tree_path_new_from_indices (end_index, -1);
4776
4777   return start_index != -1;
4778 }
4779
4780 /**
4781  * gtk_icon_view_selected_foreach:
4782  * @icon_view: A #GtkIconView.
4783  * @func: (scope call): The function to call for each selected icon.
4784  * @data: User data to pass to the function.
4785  *
4786  * Calls a function for each selected icon. Note that the model or
4787  * selection cannot be modified from within this function.
4788  *
4789  * Since: 2.6
4790  **/
4791 void
4792 gtk_icon_view_selected_foreach (GtkIconView           *icon_view,
4793                                 GtkIconViewForeachFunc func,
4794                                 gpointer               data)
4795 {
4796   GList *list;
4797
4798   for (list = icon_view->priv->items; list; list = list->next)
4799     {
4800       GtkIconViewItem *item = list->data;
4801       GtkTreePath *path = gtk_tree_path_new_from_indices (item->index, -1);
4802
4803       if (item->selected)
4804         (* func) (icon_view, path, data);
4805
4806       gtk_tree_path_free (path);
4807     }
4808 }
4809
4810 /**
4811  * gtk_icon_view_set_selection_mode:
4812  * @icon_view: A #GtkIconView.
4813  * @mode: The selection mode
4814  *
4815  * Sets the selection mode of the @icon_view.
4816  *
4817  * Since: 2.6
4818  **/
4819 void
4820 gtk_icon_view_set_selection_mode (GtkIconView      *icon_view,
4821                                   GtkSelectionMode  mode)
4822 {
4823   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4824
4825   if (mode == icon_view->priv->selection_mode)
4826     return;
4827
4828   if (mode == GTK_SELECTION_NONE ||
4829       icon_view->priv->selection_mode == GTK_SELECTION_MULTIPLE)
4830     gtk_icon_view_unselect_all (icon_view);
4831
4832   icon_view->priv->selection_mode = mode;
4833
4834   g_object_notify (G_OBJECT (icon_view), "selection-mode");
4835 }
4836
4837 /**
4838  * gtk_icon_view_get_selection_mode:
4839  * @icon_view: A #GtkIconView.
4840  *
4841  * Gets the selection mode of the @icon_view.
4842  *
4843  * Return value: the current selection mode
4844  *
4845  * Since: 2.6
4846  **/
4847 GtkSelectionMode
4848 gtk_icon_view_get_selection_mode (GtkIconView *icon_view)
4849 {
4850   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), GTK_SELECTION_SINGLE);
4851
4852   return icon_view->priv->selection_mode;
4853 }
4854
4855 /**
4856  * gtk_icon_view_set_model:
4857  * @icon_view: A #GtkIconView.
4858  * @model: (allow-none): The model.
4859  *
4860  * Sets the model for a #GtkIconView.
4861  * If the @icon_view already has a model set, it will remove
4862  * it before setting the new model.  If @model is %NULL, then
4863  * it will unset the old model.
4864  *
4865  * Since: 2.6
4866  **/
4867 void
4868 gtk_icon_view_set_model (GtkIconView *icon_view,
4869                          GtkTreeModel *model)
4870 {
4871   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4872   g_return_if_fail (model == NULL || GTK_IS_TREE_MODEL (model));
4873
4874   if (icon_view->priv->model == model)
4875     return;
4876
4877   if (icon_view->priv->scroll_to_path)
4878     {
4879       gtk_tree_row_reference_free (icon_view->priv->scroll_to_path);
4880       icon_view->priv->scroll_to_path = NULL;
4881     }
4882
4883   /* The area can be NULL while disposing */
4884   if (icon_view->priv->cell_area)
4885     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
4886
4887   if (model)
4888     {
4889       GType column_type;
4890
4891       if (icon_view->priv->pixbuf_column != -1)
4892         {
4893           column_type = gtk_tree_model_get_column_type (model,
4894                                                         icon_view->priv->pixbuf_column);
4895
4896           g_return_if_fail (column_type == GDK_TYPE_PIXBUF);
4897         }
4898
4899       if (icon_view->priv->text_column != -1)
4900         {
4901           column_type = gtk_tree_model_get_column_type (model,
4902                                                         icon_view->priv->text_column);
4903
4904           g_return_if_fail (column_type == G_TYPE_STRING);
4905         }
4906
4907       if (icon_view->priv->markup_column != -1)
4908         {
4909           column_type = gtk_tree_model_get_column_type (model,
4910                                                         icon_view->priv->markup_column);
4911
4912           g_return_if_fail (column_type == G_TYPE_STRING);
4913         }
4914
4915     }
4916
4917   if (icon_view->priv->model)
4918     {
4919       g_signal_handlers_disconnect_by_func (icon_view->priv->model,
4920                                             gtk_icon_view_row_changed,
4921                                             icon_view);
4922       g_signal_handlers_disconnect_by_func (icon_view->priv->model,
4923                                             gtk_icon_view_row_inserted,
4924                                             icon_view);
4925       g_signal_handlers_disconnect_by_func (icon_view->priv->model,
4926                                             gtk_icon_view_row_deleted,
4927                                             icon_view);
4928       g_signal_handlers_disconnect_by_func (icon_view->priv->model,
4929                                             gtk_icon_view_rows_reordered,
4930                                             icon_view);
4931
4932       g_object_unref (icon_view->priv->model);
4933
4934       g_list_free_full (icon_view->priv->items, (GDestroyNotify) gtk_icon_view_item_free);
4935       icon_view->priv->items = NULL;
4936       icon_view->priv->anchor_item = NULL;
4937       icon_view->priv->cursor_item = NULL;
4938       icon_view->priv->last_single_clicked = NULL;
4939       icon_view->priv->last_prelight = NULL;
4940       icon_view->priv->width = 0;
4941       icon_view->priv->height = 0;
4942     }
4943
4944   icon_view->priv->model = model;
4945
4946   if (icon_view->priv->model)
4947     {
4948       g_object_ref (icon_view->priv->model);
4949       g_signal_connect (icon_view->priv->model,
4950                         "row-changed",
4951                         G_CALLBACK (gtk_icon_view_row_changed),
4952                         icon_view);
4953       g_signal_connect (icon_view->priv->model,
4954                         "row-inserted",
4955                         G_CALLBACK (gtk_icon_view_row_inserted),
4956                         icon_view);
4957       g_signal_connect (icon_view->priv->model,
4958                         "row-deleted",
4959                         G_CALLBACK (gtk_icon_view_row_deleted),
4960                         icon_view);
4961       g_signal_connect (icon_view->priv->model,
4962                         "rows-reordered",
4963                         G_CALLBACK (gtk_icon_view_rows_reordered),
4964                         icon_view);
4965
4966       gtk_icon_view_build_items (icon_view);
4967     }
4968
4969   g_object_notify (G_OBJECT (icon_view), "model");
4970
4971   gtk_widget_queue_resize (GTK_WIDGET (icon_view));
4972 }
4973
4974 /**
4975  * gtk_icon_view_get_model:
4976  * @icon_view: a #GtkIconView
4977  *
4978  * Returns the model the #GtkIconView is based on.  Returns %NULL if the
4979  * model is unset.
4980  *
4981  * Return value: (transfer none): A #GtkTreeModel, or %NULL if none is
4982  *     currently being used.
4983  *
4984  * Since: 2.6
4985  **/
4986 GtkTreeModel *
4987 gtk_icon_view_get_model (GtkIconView *icon_view)
4988 {
4989   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), NULL);
4990
4991   return icon_view->priv->model;
4992 }
4993
4994 static void
4995 update_text_cell (GtkIconView *icon_view)
4996 {
4997   if (!icon_view->priv->cell_area)
4998     return;
4999
5000   if (icon_view->priv->text_column == -1 &&
5001       icon_view->priv->markup_column == -1)
5002     {
5003       if (icon_view->priv->text_cell != NULL)
5004         {
5005           gtk_cell_area_remove (icon_view->priv->cell_area,
5006                                 icon_view->priv->text_cell);
5007           icon_view->priv->text_cell = NULL;
5008         }
5009     }
5010   else
5011     {
5012       if (icon_view->priv->text_cell == NULL)
5013         {
5014           icon_view->priv->text_cell = gtk_cell_renderer_text_new ();
5015
5016           gtk_cell_layout_pack_end (GTK_CELL_LAYOUT (icon_view), icon_view->priv->text_cell, FALSE);
5017         }
5018
5019       if (icon_view->priv->markup_column != -1)
5020         gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (icon_view),
5021                                         icon_view->priv->text_cell,
5022                                         "markup", icon_view->priv->markup_column,
5023                                         NULL);
5024       else
5025         gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (icon_view),
5026                                         icon_view->priv->text_cell,
5027                                         "text", icon_view->priv->text_column,
5028                                         NULL);
5029
5030       if (icon_view->priv->item_orientation == GTK_ORIENTATION_VERTICAL)
5031         g_object_set (icon_view->priv->text_cell,
5032                       "alignment", PANGO_ALIGN_CENTER,
5033                       "wrap-mode", PANGO_WRAP_WORD_CHAR,
5034                       "xalign", 0.5,
5035                       "yalign", 0.0,
5036                       NULL);
5037       else
5038         g_object_set (icon_view->priv->text_cell,
5039                       "alignment", PANGO_ALIGN_LEFT,
5040                       "wrap-mode", PANGO_WRAP_WORD_CHAR,
5041                       "xalign", 0.0,
5042                       "yalign", 0.5,
5043                       NULL);
5044     }
5045 }
5046
5047 static void
5048 update_pixbuf_cell (GtkIconView *icon_view)
5049 {
5050   if (!icon_view->priv->cell_area)
5051     return;
5052
5053   if (icon_view->priv->pixbuf_column == -1)
5054     {
5055       if (icon_view->priv->pixbuf_cell != NULL)
5056         {
5057           gtk_cell_area_remove (icon_view->priv->cell_area,
5058                                 icon_view->priv->pixbuf_cell);
5059
5060           icon_view->priv->pixbuf_cell = NULL;
5061         }
5062     }
5063   else
5064     {
5065       if (icon_view->priv->pixbuf_cell == NULL)
5066         {
5067           icon_view->priv->pixbuf_cell = gtk_cell_renderer_pixbuf_new ();
5068
5069           gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (icon_view), icon_view->priv->pixbuf_cell, FALSE);
5070         }
5071
5072       gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (icon_view),
5073                                       icon_view->priv->pixbuf_cell,
5074                                       "pixbuf", icon_view->priv->pixbuf_column,
5075                                       NULL);
5076
5077       if (icon_view->priv->item_orientation == GTK_ORIENTATION_VERTICAL)
5078         g_object_set (icon_view->priv->pixbuf_cell,
5079                       "xalign", 0.5,
5080                       "yalign", 1.0,
5081                       NULL);
5082       else
5083         g_object_set (icon_view->priv->pixbuf_cell,
5084                       "xalign", 0.0,
5085                       "yalign", 0.0,
5086                       NULL);
5087     }
5088 }
5089
5090 /**
5091  * gtk_icon_view_set_text_column:
5092  * @icon_view: A #GtkIconView.
5093  * @column: A column in the currently used model, or -1 to display no text
5094  *
5095  * Sets the column with text for @icon_view to be @column. The text
5096  * column must be of type #G_TYPE_STRING.
5097  *
5098  * Since: 2.6
5099  **/
5100 void
5101 gtk_icon_view_set_text_column (GtkIconView *icon_view,
5102                                gint          column)
5103 {
5104   if (column == icon_view->priv->text_column)
5105     return;
5106
5107   if (column == -1)
5108     icon_view->priv->text_column = -1;
5109   else
5110     {
5111       if (icon_view->priv->model != NULL)
5112         {
5113           GType column_type;
5114
5115           column_type = gtk_tree_model_get_column_type (icon_view->priv->model, column);
5116
5117           g_return_if_fail (column_type == G_TYPE_STRING);
5118         }
5119
5120       icon_view->priv->text_column = column;
5121     }
5122
5123   if (icon_view->priv->cell_area)
5124     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5125
5126   update_text_cell (icon_view);
5127
5128   gtk_icon_view_invalidate_sizes (icon_view);
5129
5130   g_object_notify (G_OBJECT (icon_view), "text-column");
5131 }
5132
5133 /**
5134  * gtk_icon_view_get_text_column:
5135  * @icon_view: A #GtkIconView.
5136  *
5137  * Returns the column with text for @icon_view.
5138  *
5139  * Returns: the text column, or -1 if it's unset.
5140  *
5141  * Since: 2.6
5142  */
5143 gint
5144 gtk_icon_view_get_text_column (GtkIconView  *icon_view)
5145 {
5146   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5147
5148   return icon_view->priv->text_column;
5149 }
5150
5151 /**
5152  * gtk_icon_view_set_markup_column:
5153  * @icon_view: A #GtkIconView.
5154  * @column: A column in the currently used model, or -1 to display no text
5155  *
5156  * Sets the column with markup information for @icon_view to be
5157  * @column. The markup column must be of type #G_TYPE_STRING.
5158  * If the markup column is set to something, it overrides
5159  * the text column set by gtk_icon_view_set_text_column().
5160  *
5161  * Since: 2.6
5162  **/
5163 void
5164 gtk_icon_view_set_markup_column (GtkIconView *icon_view,
5165                                  gint         column)
5166 {
5167   if (column == icon_view->priv->markup_column)
5168     return;
5169
5170   if (column == -1)
5171     icon_view->priv->markup_column = -1;
5172   else
5173     {
5174       if (icon_view->priv->model != NULL)
5175         {
5176           GType column_type;
5177
5178           column_type = gtk_tree_model_get_column_type (icon_view->priv->model, column);
5179
5180           g_return_if_fail (column_type == G_TYPE_STRING);
5181         }
5182
5183       icon_view->priv->markup_column = column;
5184     }
5185
5186   if (icon_view->priv->cell_area)
5187     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5188
5189   update_text_cell (icon_view);
5190
5191   gtk_icon_view_invalidate_sizes (icon_view);
5192
5193   g_object_notify (G_OBJECT (icon_view), "markup-column");
5194 }
5195
5196 /**
5197  * gtk_icon_view_get_markup_column:
5198  * @icon_view: A #GtkIconView.
5199  *
5200  * Returns the column with markup text for @icon_view.
5201  *
5202  * Returns: the markup column, or -1 if it's unset.
5203  *
5204  * Since: 2.6
5205  */
5206 gint
5207 gtk_icon_view_get_markup_column (GtkIconView  *icon_view)
5208 {
5209   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5210
5211   return icon_view->priv->markup_column;
5212 }
5213
5214 /**
5215  * gtk_icon_view_set_pixbuf_column:
5216  * @icon_view: A #GtkIconView.
5217  * @column: A column in the currently used model, or -1 to disable
5218  *
5219  * Sets the column with pixbufs for @icon_view to be @column. The pixbuf
5220  * column must be of type #GDK_TYPE_PIXBUF
5221  *
5222  * Since: 2.6
5223  **/
5224 void
5225 gtk_icon_view_set_pixbuf_column (GtkIconView *icon_view,
5226                                  gint         column)
5227 {
5228   if (column == icon_view->priv->pixbuf_column)
5229     return;
5230
5231   if (column == -1)
5232     icon_view->priv->pixbuf_column = -1;
5233   else
5234     {
5235       if (icon_view->priv->model != NULL)
5236         {
5237           GType column_type;
5238
5239           column_type = gtk_tree_model_get_column_type (icon_view->priv->model, column);
5240
5241           g_return_if_fail (column_type == GDK_TYPE_PIXBUF);
5242         }
5243
5244       icon_view->priv->pixbuf_column = column;
5245     }
5246
5247   if (icon_view->priv->cell_area)
5248     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5249
5250   update_pixbuf_cell (icon_view);
5251
5252   gtk_icon_view_invalidate_sizes (icon_view);
5253
5254   g_object_notify (G_OBJECT (icon_view), "pixbuf-column");
5255
5256 }
5257
5258 /**
5259  * gtk_icon_view_get_pixbuf_column:
5260  * @icon_view: A #GtkIconView.
5261  *
5262  * Returns the column with pixbufs for @icon_view.
5263  *
5264  * Returns: the pixbuf column, or -1 if it's unset.
5265  *
5266  * Since: 2.6
5267  */
5268 gint
5269 gtk_icon_view_get_pixbuf_column (GtkIconView  *icon_view)
5270 {
5271   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5272
5273   return icon_view->priv->pixbuf_column;
5274 }
5275
5276 /**
5277  * gtk_icon_view_select_path:
5278  * @icon_view: A #GtkIconView.
5279  * @path: The #GtkTreePath to be selected.
5280  *
5281  * Selects the row at @path.
5282  *
5283  * Since: 2.6
5284  **/
5285 void
5286 gtk_icon_view_select_path (GtkIconView *icon_view,
5287                            GtkTreePath *path)
5288 {
5289   GtkIconViewItem *item = NULL;
5290
5291   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5292   g_return_if_fail (icon_view->priv->model != NULL);
5293   g_return_if_fail (path != NULL);
5294
5295   if (gtk_tree_path_get_depth (path) > 0)
5296     item = g_list_nth_data (icon_view->priv->items,
5297                             gtk_tree_path_get_indices(path)[0]);
5298
5299   if (item)
5300     _gtk_icon_view_select_item (icon_view, item);
5301 }
5302
5303 /**
5304  * gtk_icon_view_unselect_path:
5305  * @icon_view: A #GtkIconView.
5306  * @path: The #GtkTreePath to be unselected.
5307  *
5308  * Unselects the row at @path.
5309  *
5310  * Since: 2.6
5311  **/
5312 void
5313 gtk_icon_view_unselect_path (GtkIconView *icon_view,
5314                              GtkTreePath *path)
5315 {
5316   GtkIconViewItem *item;
5317
5318   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5319   g_return_if_fail (icon_view->priv->model != NULL);
5320   g_return_if_fail (path != NULL);
5321
5322   item = g_list_nth_data (icon_view->priv->items,
5323                           gtk_tree_path_get_indices(path)[0]);
5324
5325   if (!item)
5326     return;
5327
5328   _gtk_icon_view_unselect_item (icon_view, item);
5329 }
5330
5331 /**
5332  * gtk_icon_view_get_selected_items:
5333  * @icon_view: A #GtkIconView.
5334  *
5335  * Creates a list of paths of all selected items. Additionally, if you are
5336  * planning on modifying the model after calling this function, you may
5337  * want to convert the returned list into a list of #GtkTreeRowReference<!-- -->s.
5338  * To do this, you can use gtk_tree_row_reference_new().
5339  *
5340  * To free the return value, use:
5341  * |[
5342  * g_list_free_full (list, (GDestroyNotify) gtk_tree_patch_free);
5343  * ]|
5344  *
5345  * Return value: (element-type GtkTreePath) (transfer full): A #GList containing a #GtkTreePath for each selected row.
5346  *
5347  * Since: 2.6
5348  **/
5349 GList *
5350 gtk_icon_view_get_selected_items (GtkIconView *icon_view)
5351 {
5352   GList *list;
5353   GList *selected = NULL;
5354
5355   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), NULL);
5356
5357   for (list = icon_view->priv->items; list != NULL; list = list->next)
5358     {
5359       GtkIconViewItem *item = list->data;
5360
5361       if (item->selected)
5362         {
5363           GtkTreePath *path = gtk_tree_path_new_from_indices (item->index, -1);
5364
5365           selected = g_list_prepend (selected, path);
5366         }
5367     }
5368
5369   return selected;
5370 }
5371
5372 /**
5373  * gtk_icon_view_select_all:
5374  * @icon_view: A #GtkIconView.
5375  *
5376  * Selects all the icons. @icon_view must has its selection mode set
5377  * to #GTK_SELECTION_MULTIPLE.
5378  *
5379  * Since: 2.6
5380  **/
5381 void
5382 gtk_icon_view_select_all (GtkIconView *icon_view)
5383 {
5384   GList *items;
5385   gboolean dirty = FALSE;
5386
5387   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5388
5389   if (icon_view->priv->selection_mode != GTK_SELECTION_MULTIPLE)
5390     return;
5391
5392   for (items = icon_view->priv->items; items; items = items->next)
5393     {
5394       GtkIconViewItem *item = items->data;
5395
5396       if (!item->selected)
5397         {
5398           dirty = TRUE;
5399           item->selected = TRUE;
5400           gtk_icon_view_queue_draw_item (icon_view, item);
5401         }
5402     }
5403
5404   if (dirty)
5405     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
5406 }
5407
5408 /**
5409  * gtk_icon_view_unselect_all:
5410  * @icon_view: A #GtkIconView.
5411  *
5412  * Unselects all the icons.
5413  *
5414  * Since: 2.6
5415  **/
5416 void
5417 gtk_icon_view_unselect_all (GtkIconView *icon_view)
5418 {
5419   gboolean dirty = FALSE;
5420
5421   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5422
5423   if (icon_view->priv->selection_mode == GTK_SELECTION_BROWSE)
5424     return;
5425
5426   dirty = gtk_icon_view_unselect_all_internal (icon_view);
5427
5428   if (dirty)
5429     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
5430 }
5431
5432 /**
5433  * gtk_icon_view_path_is_selected:
5434  * @icon_view: A #GtkIconView.
5435  * @path: A #GtkTreePath to check selection on.
5436  *
5437  * Returns %TRUE if the icon pointed to by @path is currently
5438  * selected. If @path does not point to a valid location, %FALSE is returned.
5439  *
5440  * Return value: %TRUE if @path is selected.
5441  *
5442  * Since: 2.6
5443  **/
5444 gboolean
5445 gtk_icon_view_path_is_selected (GtkIconView *icon_view,
5446                                 GtkTreePath *path)
5447 {
5448   GtkIconViewItem *item;
5449
5450   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
5451   g_return_val_if_fail (icon_view->priv->model != NULL, FALSE);
5452   g_return_val_if_fail (path != NULL, FALSE);
5453
5454   item = g_list_nth_data (icon_view->priv->items,
5455                           gtk_tree_path_get_indices(path)[0]);
5456
5457   if (!item)
5458     return FALSE;
5459
5460   return item->selected;
5461 }
5462
5463 /**
5464  * gtk_icon_view_get_item_row:
5465  * @icon_view: a #GtkIconView
5466  * @path: the #GtkTreePath of the item
5467  *
5468  * Gets the row in which the item @path is currently
5469  * displayed. Row numbers start at 0.
5470  *
5471  * Returns: The row in which the item is displayed
5472  *
5473  * Since: 2.22
5474  */
5475 gint
5476 gtk_icon_view_get_item_row (GtkIconView *icon_view,
5477                             GtkTreePath *path)
5478 {
5479   GtkIconViewItem *item;
5480
5481   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5482   g_return_val_if_fail (icon_view->priv->model != NULL, -1);
5483   g_return_val_if_fail (path != NULL, -1);
5484
5485   item = g_list_nth_data (icon_view->priv->items,
5486                           gtk_tree_path_get_indices(path)[0]);
5487
5488   if (!item)
5489     return -1;
5490
5491   return item->row;
5492 }
5493
5494 /**
5495  * gtk_icon_view_get_item_column:
5496  * @icon_view: a #GtkIconView
5497  * @path: the #GtkTreePath of the item
5498  *
5499  * Gets the column in which the item @path is currently
5500  * displayed. Column numbers start at 0.
5501  *
5502  * Returns: The column in which the item is displayed
5503  *
5504  * Since: 2.22
5505  */
5506 gint
5507 gtk_icon_view_get_item_column (GtkIconView *icon_view,
5508                                GtkTreePath *path)
5509 {
5510   GtkIconViewItem *item;
5511
5512   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5513   g_return_val_if_fail (icon_view->priv->model != NULL, -1);
5514   g_return_val_if_fail (path != NULL, -1);
5515
5516   item = g_list_nth_data (icon_view->priv->items,
5517                           gtk_tree_path_get_indices(path)[0]);
5518
5519   if (!item)
5520     return -1;
5521
5522   return item->col;
5523 }
5524
5525 /**
5526  * gtk_icon_view_item_activated:
5527  * @icon_view: A #GtkIconView
5528  * @path: The #GtkTreePath to be activated
5529  *
5530  * Activates the item determined by @path.
5531  *
5532  * Since: 2.6
5533  **/
5534 void
5535 gtk_icon_view_item_activated (GtkIconView      *icon_view,
5536                               GtkTreePath      *path)
5537 {
5538   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5539   g_return_if_fail (path != NULL);
5540
5541   g_signal_emit (icon_view, icon_view_signals[ITEM_ACTIVATED], 0, path);
5542 }
5543
5544 /**
5545  * gtk_icon_view_set_item_orientation:
5546  * @icon_view: a #GtkIconView
5547  * @orientation: the relative position of texts and icons
5548  *
5549  * Sets the ::item-orientation property which determines whether the labels
5550  * are drawn beside the icons instead of below.
5551  *
5552  * Since: 2.6
5553  **/
5554 void
5555 gtk_icon_view_set_item_orientation (GtkIconView    *icon_view,
5556                                     GtkOrientation  orientation)
5557 {
5558   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5559
5560   if (icon_view->priv->item_orientation != orientation)
5561     {
5562       icon_view->priv->item_orientation = orientation;
5563
5564       if (icon_view->priv->cell_area)
5565         {
5566           if (GTK_IS_ORIENTABLE (icon_view->priv->cell_area))
5567             gtk_orientable_set_orientation (GTK_ORIENTABLE (icon_view->priv->cell_area),
5568                                             icon_view->priv->item_orientation);
5569
5570           gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5571         }
5572
5573       gtk_icon_view_invalidate_sizes (icon_view);
5574
5575       update_text_cell (icon_view);
5576       update_pixbuf_cell (icon_view);
5577
5578       g_object_notify (G_OBJECT (icon_view), "item-orientation");
5579     }
5580 }
5581
5582 /**
5583  * gtk_icon_view_get_item_orientation:
5584  * @icon_view: a #GtkIconView
5585  *
5586  * Returns the value of the ::item-orientation property which determines
5587  * whether the labels are drawn beside the icons instead of below.
5588  *
5589  * Return value: the relative position of texts and icons
5590  *
5591  * Since: 2.6
5592  **/
5593 GtkOrientation
5594 gtk_icon_view_get_item_orientation (GtkIconView *icon_view)
5595 {
5596   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view),
5597                         GTK_ORIENTATION_VERTICAL);
5598
5599   return icon_view->priv->item_orientation;
5600 }
5601
5602 /**
5603  * gtk_icon_view_set_columns:
5604  * @icon_view: a #GtkIconView
5605  * @columns: the number of columns
5606  *
5607  * Sets the ::columns property which determines in how
5608  * many columns the icons are arranged. If @columns is
5609  * -1, the number of columns will be chosen automatically
5610  * to fill the available area.
5611  *
5612  * Since: 2.6
5613  */
5614 void
5615 gtk_icon_view_set_columns (GtkIconView *icon_view,
5616                            gint         columns)
5617 {
5618   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5619
5620   if (icon_view->priv->columns != columns)
5621     {
5622       icon_view->priv->columns = columns;
5623
5624       if (icon_view->priv->cell_area)
5625         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5626
5627       gtk_widget_queue_resize (GTK_WIDGET (icon_view));
5628
5629       g_object_notify (G_OBJECT (icon_view), "columns");
5630     }
5631 }
5632
5633 /**
5634  * gtk_icon_view_get_columns:
5635  * @icon_view: a #GtkIconView
5636  *
5637  * Returns the value of the ::columns property.
5638  *
5639  * Return value: the number of columns, or -1
5640  *
5641  * Since: 2.6
5642  */
5643 gint
5644 gtk_icon_view_get_columns (GtkIconView *icon_view)
5645 {
5646   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5647
5648   return icon_view->priv->columns;
5649 }
5650
5651 /**
5652  * gtk_icon_view_set_item_width:
5653  * @icon_view: a #GtkIconView
5654  * @item_width: the width for each item
5655  *
5656  * Sets the ::item-width property which specifies the width
5657  * to use for each item. If it is set to -1, the icon view will
5658  * automatically determine a suitable item size.
5659  *
5660  * Since: 2.6
5661  */
5662 void
5663 gtk_icon_view_set_item_width (GtkIconView *icon_view,
5664                               gint         item_width)
5665 {
5666   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5667
5668   if (icon_view->priv->item_width != item_width)
5669     {
5670       icon_view->priv->item_width = item_width;
5671
5672       if (icon_view->priv->cell_area)
5673         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5674
5675       gtk_icon_view_invalidate_sizes (icon_view);
5676
5677       update_text_cell (icon_view);
5678
5679       g_object_notify (G_OBJECT (icon_view), "item-width");
5680     }
5681 }
5682
5683 /**
5684  * gtk_icon_view_get_item_width:
5685  * @icon_view: a #GtkIconView
5686  *
5687  * Returns the value of the ::item-width property.
5688  *
5689  * Return value: the width of a single item, or -1
5690  *
5691  * Since: 2.6
5692  */
5693 gint
5694 gtk_icon_view_get_item_width (GtkIconView *icon_view)
5695 {
5696   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5697
5698   return icon_view->priv->item_width;
5699 }
5700
5701
5702 /**
5703  * gtk_icon_view_set_spacing:
5704  * @icon_view: a #GtkIconView
5705  * @spacing: the spacing
5706  *
5707  * Sets the ::spacing property which specifies the space
5708  * which is inserted between the cells (i.e. the icon and
5709  * the text) of an item.
5710  *
5711  * Since: 2.6
5712  */
5713 void
5714 gtk_icon_view_set_spacing (GtkIconView *icon_view,
5715                            gint         spacing)
5716 {
5717   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5718
5719   if (icon_view->priv->spacing != spacing)
5720     {
5721       icon_view->priv->spacing = spacing;
5722
5723       if (icon_view->priv->cell_area)
5724         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5725
5726       gtk_icon_view_invalidate_sizes (icon_view);
5727
5728       g_object_notify (G_OBJECT (icon_view), "spacing");
5729     }
5730 }
5731
5732 /**
5733  * gtk_icon_view_get_spacing:
5734  * @icon_view: a #GtkIconView
5735  *
5736  * Returns the value of the ::spacing property.
5737  *
5738  * Return value: the space between cells
5739  *
5740  * Since: 2.6
5741  */
5742 gint
5743 gtk_icon_view_get_spacing (GtkIconView *icon_view)
5744 {
5745   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5746
5747   return icon_view->priv->spacing;
5748 }
5749
5750 /**
5751  * gtk_icon_view_set_row_spacing:
5752  * @icon_view: a #GtkIconView
5753  * @row_spacing: the row spacing
5754  *
5755  * Sets the ::row-spacing property which specifies the space
5756  * which is inserted between the rows of the icon view.
5757  *
5758  * Since: 2.6
5759  */
5760 void
5761 gtk_icon_view_set_row_spacing (GtkIconView *icon_view,
5762                                gint         row_spacing)
5763 {
5764   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5765
5766   if (icon_view->priv->row_spacing != row_spacing)
5767     {
5768       icon_view->priv->row_spacing = row_spacing;
5769
5770       if (icon_view->priv->cell_area)
5771         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5772
5773       gtk_icon_view_invalidate_sizes (icon_view);
5774
5775       g_object_notify (G_OBJECT (icon_view), "row-spacing");
5776     }
5777 }
5778
5779 /**
5780  * gtk_icon_view_get_row_spacing:
5781  * @icon_view: a #GtkIconView
5782  *
5783  * Returns the value of the ::row-spacing property.
5784  *
5785  * Return value: the space between rows
5786  *
5787  * Since: 2.6
5788  */
5789 gint
5790 gtk_icon_view_get_row_spacing (GtkIconView *icon_view)
5791 {
5792   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5793
5794   return icon_view->priv->row_spacing;
5795 }
5796
5797 /**
5798  * gtk_icon_view_set_column_spacing:
5799  * @icon_view: a #GtkIconView
5800  * @column_spacing: the column spacing
5801  *
5802  * Sets the ::column-spacing property which specifies the space
5803  * which is inserted between the columns of the icon view.
5804  *
5805  * Since: 2.6
5806  */
5807 void
5808 gtk_icon_view_set_column_spacing (GtkIconView *icon_view,
5809                                   gint         column_spacing)
5810 {
5811   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5812
5813   if (icon_view->priv->column_spacing != column_spacing)
5814     {
5815       icon_view->priv->column_spacing = column_spacing;
5816
5817       if (icon_view->priv->cell_area)
5818         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5819
5820       gtk_icon_view_invalidate_sizes (icon_view);
5821
5822       g_object_notify (G_OBJECT (icon_view), "column-spacing");
5823     }
5824 }
5825
5826 /**
5827  * gtk_icon_view_get_column_spacing:
5828  * @icon_view: a #GtkIconView
5829  *
5830  * Returns the value of the ::column-spacing property.
5831  *
5832  * Return value: the space between columns
5833  *
5834  * Since: 2.6
5835  */
5836 gint
5837 gtk_icon_view_get_column_spacing (GtkIconView *icon_view)
5838 {
5839   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5840
5841   return icon_view->priv->column_spacing;
5842 }
5843
5844 /**
5845  * gtk_icon_view_set_margin:
5846  * @icon_view: a #GtkIconView
5847  * @margin: the margin
5848  *
5849  * Sets the ::margin property which specifies the space
5850  * which is inserted at the top, bottom, left and right
5851  * of the icon view.
5852  *
5853  * Since: 2.6
5854  */
5855 void
5856 gtk_icon_view_set_margin (GtkIconView *icon_view,
5857                           gint         margin)
5858 {
5859   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5860
5861   if (icon_view->priv->margin != margin)
5862     {
5863       icon_view->priv->margin = margin;
5864
5865       if (icon_view->priv->cell_area)
5866         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5867
5868       gtk_icon_view_invalidate_sizes (icon_view);
5869
5870       g_object_notify (G_OBJECT (icon_view), "margin");
5871     }
5872 }
5873
5874 /**
5875  * gtk_icon_view_get_margin:
5876  * @icon_view: a #GtkIconView
5877  *
5878  * Returns the value of the ::margin property.
5879  *
5880  * Return value: the space at the borders
5881  *
5882  * Since: 2.6
5883  */
5884 gint
5885 gtk_icon_view_get_margin (GtkIconView *icon_view)
5886 {
5887   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5888
5889   return icon_view->priv->margin;
5890 }
5891
5892 /**
5893  * gtk_icon_view_set_item_padding:
5894  * @icon_view: a #GtkIconView
5895  * @item_padding: the item padding
5896  *
5897  * Sets the #GtkIconView:item-padding property which specifies the padding
5898  * around each of the icon view's items.
5899  *
5900  * Since: 2.18
5901  */
5902 void
5903 gtk_icon_view_set_item_padding (GtkIconView *icon_view,
5904                                 gint         item_padding)
5905 {
5906   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5907
5908   if (icon_view->priv->item_padding != item_padding)
5909     {
5910       icon_view->priv->item_padding = item_padding;
5911
5912       if (icon_view->priv->cell_area)
5913         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5914
5915       gtk_icon_view_invalidate_sizes (icon_view);
5916
5917       g_object_notify (G_OBJECT (icon_view), "item-padding");
5918     }
5919 }
5920
5921 /**
5922  * gtk_icon_view_get_item_padding:
5923  * @icon_view: a #GtkIconView
5924  *
5925  * Returns the value of the ::item-padding property.
5926  *
5927  * Return value: the padding around items
5928  *
5929  * Since: 2.18
5930  */
5931 gint
5932 gtk_icon_view_get_item_padding (GtkIconView *icon_view)
5933 {
5934   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5935
5936   return icon_view->priv->item_padding;
5937 }
5938
5939 /* Get/set whether drag_motion requested the drag data and
5940  * drag_data_received should thus not actually insert the data,
5941  * since the data doesn't result from a drop.
5942  */
5943 static void
5944 set_status_pending (GdkDragContext *context,
5945                     GdkDragAction   suggested_action)
5946 {
5947   g_object_set_data (G_OBJECT (context),
5948                      I_("gtk-icon-view-status-pending"),
5949                      GINT_TO_POINTER (suggested_action));
5950 }
5951
5952 static GdkDragAction
5953 get_status_pending (GdkDragContext *context)
5954 {
5955   return GPOINTER_TO_INT (g_object_get_data (G_OBJECT (context),
5956                                              "gtk-icon-view-status-pending"));
5957 }
5958
5959 static void
5960 unset_reorderable (GtkIconView *icon_view)
5961 {
5962   if (icon_view->priv->reorderable)
5963     {
5964       icon_view->priv->reorderable = FALSE;
5965       g_object_notify (G_OBJECT (icon_view), "reorderable");
5966     }
5967 }
5968
5969 static void
5970 set_source_row (GdkDragContext *context,
5971                 GtkTreeModel   *model,
5972                 GtkTreePath    *source_row)
5973 {
5974   if (source_row)
5975     g_object_set_data_full (G_OBJECT (context),
5976                             I_("gtk-icon-view-source-row"),
5977                             gtk_tree_row_reference_new (model, source_row),
5978                             (GDestroyNotify) gtk_tree_row_reference_free);
5979   else
5980     g_object_set_data_full (G_OBJECT (context),
5981                             I_("gtk-icon-view-source-row"),
5982                             NULL, NULL);
5983 }
5984
5985 static GtkTreePath*
5986 get_source_row (GdkDragContext *context)
5987 {
5988   GtkTreeRowReference *ref;
5989
5990   ref = g_object_get_data (G_OBJECT (context), "gtk-icon-view-source-row");
5991
5992   if (ref)
5993     return gtk_tree_row_reference_get_path (ref);
5994   else
5995     return NULL;
5996 }
5997
5998 typedef struct
5999 {
6000   GtkTreeRowReference *dest_row;
6001   gboolean             empty_view_drop;
6002   gboolean             drop_append_mode;
6003 } DestRow;
6004
6005 static void
6006 dest_row_free (gpointer data)
6007 {
6008   DestRow *dr = (DestRow *)data;
6009
6010   gtk_tree_row_reference_free (dr->dest_row);
6011   g_free (dr);
6012 }
6013
6014 static void
6015 set_dest_row (GdkDragContext *context,
6016               GtkTreeModel   *model,
6017               GtkTreePath    *dest_row,
6018               gboolean        empty_view_drop,
6019               gboolean        drop_append_mode)
6020 {
6021   DestRow *dr;
6022
6023   if (!dest_row)
6024     {
6025       g_object_set_data_full (G_OBJECT (context),
6026                               I_("gtk-icon-view-dest-row"),
6027                               NULL, NULL);
6028       return;
6029     }
6030
6031   dr = g_new0 (DestRow, 1);
6032
6033   dr->dest_row = gtk_tree_row_reference_new (model, dest_row);
6034   dr->empty_view_drop = empty_view_drop;
6035   dr->drop_append_mode = drop_append_mode;
6036   g_object_set_data_full (G_OBJECT (context),
6037                           I_("gtk-icon-view-dest-row"),
6038                           dr, (GDestroyNotify) dest_row_free);
6039 }
6040
6041 static GtkTreePath*
6042 get_dest_row (GdkDragContext *context)
6043 {
6044   DestRow *dr;
6045
6046   dr = g_object_get_data (G_OBJECT (context), "gtk-icon-view-dest-row");
6047
6048   if (dr)
6049     {
6050       GtkTreePath *path = NULL;
6051
6052       if (dr->dest_row)
6053         path = gtk_tree_row_reference_get_path (dr->dest_row);
6054       else if (dr->empty_view_drop)
6055         path = gtk_tree_path_new_from_indices (0, -1);
6056       else
6057         path = NULL;
6058
6059       if (path && dr->drop_append_mode)
6060         gtk_tree_path_next (path);
6061
6062       return path;
6063     }
6064   else
6065     return NULL;
6066 }
6067
6068 static gboolean
6069 check_model_dnd (GtkTreeModel *model,
6070                  GType         required_iface,
6071                  const gchar  *signal)
6072 {
6073   if (model == NULL || !G_TYPE_CHECK_INSTANCE_TYPE ((model), required_iface))
6074     {
6075       g_warning ("You must override the default '%s' handler "
6076                  "on GtkIconView when using models that don't support "
6077                  "the %s interface and enabling drag-and-drop. The simplest way to do this "
6078                  "is to connect to '%s' and call "
6079                  "g_signal_stop_emission_by_name() in your signal handler to prevent "
6080                  "the default handler from running. Look at the source code "
6081                  "for the default handler in gtkiconview.c to get an idea what "
6082                  "your handler should do. (gtkiconview.c is in the GTK+ source "
6083                  "code.) If you're using GTK+ from a language other than C, "
6084                  "there may be a more natural way to override default handlers, e.g. via derivation.",
6085                  signal, g_type_name (required_iface), signal);
6086       return FALSE;
6087     }
6088   else
6089     return TRUE;
6090 }
6091
6092 static void
6093 remove_scroll_timeout (GtkIconView *icon_view)
6094 {
6095   if (icon_view->priv->scroll_timeout_id != 0)
6096     {
6097       g_source_remove (icon_view->priv->scroll_timeout_id);
6098
6099       icon_view->priv->scroll_timeout_id = 0;
6100     }
6101 }
6102
6103 static void
6104 gtk_icon_view_autoscroll (GtkIconView *icon_view,
6105                           GdkDevice   *device)
6106 {
6107   GdkWindow *window;
6108   gint px, py, width, height;
6109   gint hoffset, voffset;
6110
6111   window = gtk_widget_get_window (GTK_WIDGET (icon_view));
6112
6113   gdk_window_get_device_position (window, device, &px, &py, NULL);
6114   gdk_window_get_geometry (window, NULL, NULL, &width, &height);
6115
6116   /* see if we are near the edge. */
6117   voffset = py - 2 * SCROLL_EDGE_SIZE;
6118   if (voffset > 0)
6119     voffset = MAX (py - (height - 2 * SCROLL_EDGE_SIZE), 0);
6120
6121   hoffset = px - 2 * SCROLL_EDGE_SIZE;
6122   if (hoffset > 0)
6123     hoffset = MAX (px - (width - 2 * SCROLL_EDGE_SIZE), 0);
6124
6125   if (voffset != 0)
6126     gtk_adjustment_set_value (icon_view->priv->vadjustment,
6127                               gtk_adjustment_get_value (icon_view->priv->vadjustment) + voffset);
6128
6129   if (hoffset != 0)
6130     gtk_adjustment_set_value (icon_view->priv->hadjustment,
6131                               gtk_adjustment_get_value (icon_view->priv->hadjustment) + hoffset);
6132 }
6133
6134 typedef struct {
6135   GtkIconView *icon_view;
6136   GdkDevice   *device;
6137 } DragScrollData;
6138
6139 static gboolean
6140 drag_scroll_timeout (gpointer datap)
6141 {
6142   DragScrollData *data = datap;
6143
6144   gtk_icon_view_autoscroll (data->icon_view, data->device);
6145
6146   return TRUE;
6147 }
6148
6149 static void
6150 drag_scroll_data_free (DragScrollData *data)
6151 {
6152   g_slice_free (DragScrollData, data);
6153 }
6154
6155 static gboolean
6156 set_destination (GtkIconView    *icon_view,
6157                  GdkDragContext *context,
6158                  gint            x,
6159                  gint            y,
6160                  GdkDragAction  *suggested_action,
6161                  GdkAtom        *target)
6162 {
6163   GtkWidget *widget;
6164   GtkTreePath *path = NULL;
6165   GtkIconViewDropPosition pos;
6166   GtkIconViewDropPosition old_pos;
6167   GtkTreePath *old_dest_path = NULL;
6168   gboolean can_drop = FALSE;
6169
6170   widget = GTK_WIDGET (icon_view);
6171
6172   *suggested_action = 0;
6173   *target = GDK_NONE;
6174
6175   if (!icon_view->priv->dest_set)
6176     {
6177       /* someone unset us as a drag dest, note that if
6178        * we return FALSE drag_leave isn't called
6179        */
6180
6181       gtk_icon_view_set_drag_dest_item (icon_view,
6182                                         NULL,
6183                                         GTK_ICON_VIEW_DROP_LEFT);
6184
6185       remove_scroll_timeout (GTK_ICON_VIEW (widget));
6186
6187       return FALSE; /* no longer a drop site */
6188     }
6189
6190   *target = gtk_drag_dest_find_target (widget, context,
6191                                        gtk_drag_dest_get_target_list (widget));
6192   if (*target == GDK_NONE)
6193     return FALSE;
6194
6195   if (!gtk_icon_view_get_dest_item_at_pos (icon_view, x, y, &path, &pos))
6196     {
6197       gint n_children;
6198       GtkTreeModel *model;
6199
6200       /* the row got dropped on empty space, let's setup a special case
6201        */
6202
6203       if (path)
6204         gtk_tree_path_free (path);
6205
6206       model = gtk_icon_view_get_model (icon_view);
6207
6208       n_children = gtk_tree_model_iter_n_children (model, NULL);
6209       if (n_children)
6210         {
6211           pos = GTK_ICON_VIEW_DROP_BELOW;
6212           path = gtk_tree_path_new_from_indices (n_children - 1, -1);
6213         }
6214       else
6215         {
6216           pos = GTK_ICON_VIEW_DROP_ABOVE;
6217           path = gtk_tree_path_new_from_indices (0, -1);
6218         }
6219
6220       can_drop = TRUE;
6221
6222       goto out;
6223     }
6224
6225   g_assert (path);
6226
6227   gtk_icon_view_get_drag_dest_item (icon_view,
6228                                     &old_dest_path,
6229                                     &old_pos);
6230
6231   if (old_dest_path)
6232     gtk_tree_path_free (old_dest_path);
6233
6234   if (TRUE /* FIXME if the location droppable predicate */)
6235     {
6236       can_drop = TRUE;
6237     }
6238
6239 out:
6240   if (can_drop)
6241     {
6242       GtkWidget *source_widget;
6243
6244       *suggested_action = gdk_drag_context_get_suggested_action (context);
6245       source_widget = gtk_drag_get_source_widget (context);
6246
6247       if (source_widget == widget)
6248         {
6249           /* Default to MOVE, unless the user has
6250            * pressed ctrl or shift to affect available actions
6251            */
6252           if ((gdk_drag_context_get_actions (context) & GDK_ACTION_MOVE) != 0)
6253             *suggested_action = GDK_ACTION_MOVE;
6254         }
6255
6256       gtk_icon_view_set_drag_dest_item (GTK_ICON_VIEW (widget),
6257                                         path, pos);
6258     }
6259   else
6260     {
6261       /* can't drop here */
6262       gtk_icon_view_set_drag_dest_item (GTK_ICON_VIEW (widget),
6263                                         NULL,
6264                                         GTK_ICON_VIEW_DROP_LEFT);
6265     }
6266
6267   if (path)
6268     gtk_tree_path_free (path);
6269
6270   return TRUE;
6271 }
6272
6273 static GtkTreePath*
6274 get_logical_destination (GtkIconView *icon_view,
6275                          gboolean    *drop_append_mode)
6276 {
6277   /* adjust path to point to the row the drop goes in front of */
6278   GtkTreePath *path = NULL;
6279   GtkIconViewDropPosition pos;
6280
6281   *drop_append_mode = FALSE;
6282
6283   gtk_icon_view_get_drag_dest_item (icon_view, &path, &pos);
6284
6285   if (path == NULL)
6286     return NULL;
6287
6288   if (pos == GTK_ICON_VIEW_DROP_RIGHT ||
6289       pos == GTK_ICON_VIEW_DROP_BELOW)
6290     {
6291       GtkTreeIter iter;
6292       GtkTreeModel *model = icon_view->priv->model;
6293
6294       if (!gtk_tree_model_get_iter (model, &iter, path) ||
6295           !gtk_tree_model_iter_next (model, &iter))
6296         *drop_append_mode = TRUE;
6297       else
6298         {
6299           *drop_append_mode = FALSE;
6300           gtk_tree_path_next (path);
6301         }
6302     }
6303
6304   return path;
6305 }
6306
6307 static gboolean
6308 gtk_icon_view_maybe_begin_drag (GtkIconView    *icon_view,
6309                                 GdkEventMotion *event)
6310 {
6311   GtkWidget *widget = GTK_WIDGET (icon_view);
6312   GdkDragContext *context;
6313   GtkTreePath *path = NULL;
6314   gint button;
6315   GtkTreeModel *model;
6316   gboolean retval = FALSE;
6317
6318   if (!icon_view->priv->source_set)
6319     goto out;
6320
6321   if (icon_view->priv->pressed_button < 0)
6322     goto out;
6323
6324   if (!gtk_drag_check_threshold (GTK_WIDGET (icon_view),
6325                                  icon_view->priv->press_start_x,
6326                                  icon_view->priv->press_start_y,
6327                                  event->x, event->y))
6328     goto out;
6329
6330   model = gtk_icon_view_get_model (icon_view);
6331
6332   if (model == NULL)
6333     goto out;
6334
6335   button = icon_view->priv->pressed_button;
6336   icon_view->priv->pressed_button = -1;
6337
6338   path = gtk_icon_view_get_path_at_pos (icon_view,
6339                                         icon_view->priv->press_start_x,
6340                                         icon_view->priv->press_start_y);
6341
6342   if (path == NULL)
6343     goto out;
6344
6345   if (!GTK_IS_TREE_DRAG_SOURCE (model) ||
6346       !gtk_tree_drag_source_row_draggable (GTK_TREE_DRAG_SOURCE (model),
6347                                            path))
6348     goto out;
6349
6350   /* FIXME Check whether we're a start button, if not return FALSE and
6351    * free path
6352    */
6353
6354   /* Now we can begin the drag */
6355
6356   retval = TRUE;
6357
6358   context = gtk_drag_begin (widget,
6359                             gtk_drag_source_get_target_list (widget),
6360                             icon_view->priv->source_actions,
6361                             button,
6362                             (GdkEvent*)event);
6363
6364   set_source_row (context, model, path);
6365
6366  out:
6367   if (path)
6368     gtk_tree_path_free (path);
6369
6370   return retval;
6371 }
6372
6373 /* Source side drag signals */
6374 static void
6375 gtk_icon_view_drag_begin (GtkWidget      *widget,
6376                           GdkDragContext *context)
6377 {
6378   GtkIconView *icon_view;
6379   GtkIconViewItem *item;
6380   cairo_surface_t *icon;
6381   gint x, y;
6382   GtkTreePath *path;
6383
6384   icon_view = GTK_ICON_VIEW (widget);
6385
6386   /* if the user uses a custom DnD impl, we don't set the icon here */
6387   if (!icon_view->priv->dest_set && !icon_view->priv->source_set)
6388     return;
6389
6390   item = _gtk_icon_view_get_item_at_coords (icon_view,
6391                                            icon_view->priv->press_start_x,
6392                                            icon_view->priv->press_start_y,
6393                                            TRUE,
6394                                            NULL);
6395
6396   g_return_if_fail (item != NULL);
6397
6398   x = icon_view->priv->press_start_x - item->cell_area.x + 1;
6399   y = icon_view->priv->press_start_y - item->cell_area.y + 1;
6400
6401   path = gtk_tree_path_new_from_indices (item->index, -1);
6402   icon = gtk_icon_view_create_drag_icon (icon_view, path);
6403   gtk_tree_path_free (path);
6404
6405   cairo_surface_set_device_offset (icon, -x, -y);
6406
6407   gtk_drag_set_icon_surface (context, icon);
6408
6409   cairo_surface_destroy (icon);
6410 }
6411
6412 static void
6413 gtk_icon_view_drag_end (GtkWidget      *widget,
6414                         GdkDragContext *context)
6415 {
6416   /* do nothing */
6417 }
6418
6419 static void
6420 gtk_icon_view_drag_data_get (GtkWidget        *widget,
6421                              GdkDragContext   *context,
6422                              GtkSelectionData *selection_data,
6423                              guint             info,
6424                              guint             time)
6425 {
6426   GtkIconView *icon_view;
6427   GtkTreeModel *model;
6428   GtkTreePath *source_row;
6429
6430   icon_view = GTK_ICON_VIEW (widget);
6431   model = gtk_icon_view_get_model (icon_view);
6432
6433   if (model == NULL)
6434     return;
6435
6436   if (!icon_view->priv->source_set)
6437     return;
6438
6439   source_row = get_source_row (context);
6440
6441   if (source_row == NULL)
6442     return;
6443
6444   /* We can implement the GTK_TREE_MODEL_ROW target generically for
6445    * any model; for DragSource models there are some other targets
6446    * we also support.
6447    */
6448
6449   if (GTK_IS_TREE_DRAG_SOURCE (model) &&
6450       gtk_tree_drag_source_drag_data_get (GTK_TREE_DRAG_SOURCE (model),
6451                                           source_row,
6452                                           selection_data))
6453     goto done;
6454
6455   /* If drag_data_get does nothing, try providing row data. */
6456   if (gtk_selection_data_get_target (selection_data) == gdk_atom_intern_static_string ("GTK_TREE_MODEL_ROW"))
6457     gtk_tree_set_row_drag_data (selection_data,
6458                                 model,
6459                                 source_row);
6460
6461  done:
6462   gtk_tree_path_free (source_row);
6463 }
6464
6465 static void
6466 gtk_icon_view_drag_data_delete (GtkWidget      *widget,
6467                                 GdkDragContext *context)
6468 {
6469   GtkTreeModel *model;
6470   GtkIconView *icon_view;
6471   GtkTreePath *source_row;
6472
6473   icon_view = GTK_ICON_VIEW (widget);
6474   model = gtk_icon_view_get_model (icon_view);
6475
6476   if (!check_model_dnd (model, GTK_TYPE_TREE_DRAG_SOURCE, "drag-data-delete"))
6477     return;
6478
6479   if (!icon_view->priv->source_set)
6480     return;
6481
6482   source_row = get_source_row (context);
6483
6484   if (source_row == NULL)
6485     return;
6486
6487   gtk_tree_drag_source_drag_data_delete (GTK_TREE_DRAG_SOURCE (model),
6488                                          source_row);
6489
6490   gtk_tree_path_free (source_row);
6491
6492   set_source_row (context, NULL, NULL);
6493 }
6494
6495 /* Target side drag signals */
6496 static void
6497 gtk_icon_view_drag_leave (GtkWidget      *widget,
6498                           GdkDragContext *context,
6499                           guint           time)
6500 {
6501   GtkIconView *icon_view;
6502
6503   icon_view = GTK_ICON_VIEW (widget);
6504
6505   /* unset any highlight row */
6506   gtk_icon_view_set_drag_dest_item (icon_view,
6507                                     NULL,
6508                                     GTK_ICON_VIEW_DROP_LEFT);
6509
6510   remove_scroll_timeout (icon_view);
6511 }
6512
6513 static gboolean
6514 gtk_icon_view_drag_motion (GtkWidget      *widget,
6515                            GdkDragContext *context,
6516                            gint            x,
6517                            gint            y,
6518                            guint           time)
6519 {
6520   GtkTreePath *path = NULL;
6521   GtkIconViewDropPosition pos;
6522   GtkIconView *icon_view;
6523   GdkDragAction suggested_action = 0;
6524   GdkAtom target;
6525   gboolean empty;
6526
6527   icon_view = GTK_ICON_VIEW (widget);
6528
6529   if (!set_destination (icon_view, context, x, y, &suggested_action, &target))
6530     return FALSE;
6531
6532   gtk_icon_view_get_drag_dest_item (icon_view, &path, &pos);
6533
6534   /* we only know this *after* set_desination_row */
6535   empty = icon_view->priv->empty_view_drop;
6536
6537   if (path == NULL && !empty)
6538     {
6539       /* Can't drop here. */
6540       gdk_drag_status (context, 0, time);
6541     }
6542   else
6543     {
6544       if (icon_view->priv->scroll_timeout_id == 0)
6545         {
6546           DragScrollData *data = g_slice_new (DragScrollData);
6547           data->icon_view = icon_view;
6548           data->device = gdk_drag_context_get_device (context);
6549
6550           icon_view->priv->scroll_timeout_id =
6551             gdk_threads_add_timeout_full (G_PRIORITY_DEFAULT, 50, drag_scroll_timeout, data, (GDestroyNotify) drag_scroll_data_free);
6552         }
6553
6554       if (target == gdk_atom_intern_static_string ("GTK_TREE_MODEL_ROW"))
6555         {
6556           /* Request data so we can use the source row when
6557            * determining whether to accept the drop
6558            */
6559           set_status_pending (context, suggested_action);
6560           gtk_drag_get_data (widget, context, target, time);
6561         }
6562       else
6563         {
6564           set_status_pending (context, 0);
6565           gdk_drag_status (context, suggested_action, time);
6566         }
6567     }
6568
6569   if (path)
6570     gtk_tree_path_free (path);
6571
6572   return TRUE;
6573 }
6574
6575 static gboolean
6576 gtk_icon_view_drag_drop (GtkWidget      *widget,
6577                          GdkDragContext *context,
6578                          gint            x,
6579                          gint            y,
6580                          guint           time)
6581 {
6582   GtkIconView *icon_view;
6583   GtkTreePath *path;
6584   GdkDragAction suggested_action = 0;
6585   GdkAtom target = GDK_NONE;
6586   GtkTreeModel *model;
6587   gboolean drop_append_mode;
6588
6589   icon_view = GTK_ICON_VIEW (widget);
6590   model = gtk_icon_view_get_model (icon_view);
6591
6592   remove_scroll_timeout (GTK_ICON_VIEW (widget));
6593
6594   if (!icon_view->priv->dest_set)
6595     return FALSE;
6596
6597   if (!check_model_dnd (model, GTK_TYPE_TREE_DRAG_DEST, "drag-drop"))
6598     return FALSE;
6599
6600   if (!set_destination (icon_view, context, x, y, &suggested_action, &target))
6601     return FALSE;
6602
6603   path = get_logical_destination (icon_view, &drop_append_mode);
6604
6605   if (target != GDK_NONE && path != NULL)
6606     {
6607       /* in case a motion had requested drag data, change things so we
6608        * treat drag data receives as a drop.
6609        */
6610       set_status_pending (context, 0);
6611       set_dest_row (context, model, path,
6612                     icon_view->priv->empty_view_drop, drop_append_mode);
6613     }
6614
6615   if (path)
6616     gtk_tree_path_free (path);
6617
6618   /* Unset this thing */
6619   gtk_icon_view_set_drag_dest_item (icon_view, NULL, GTK_ICON_VIEW_DROP_LEFT);
6620
6621   if (target != GDK_NONE)
6622     {
6623       gtk_drag_get_data (widget, context, target, time);
6624       return TRUE;
6625     }
6626   else
6627     return FALSE;
6628 }
6629
6630 static void
6631 gtk_icon_view_drag_data_received (GtkWidget        *widget,
6632                                   GdkDragContext   *context,
6633                                   gint              x,
6634                                   gint              y,
6635                                   GtkSelectionData *selection_data,
6636                                   guint             info,
6637                                   guint             time)
6638 {
6639   GtkTreePath *path;
6640   gboolean accepted = FALSE;
6641   GtkTreeModel *model;
6642   GtkIconView *icon_view;
6643   GtkTreePath *dest_row;
6644   GdkDragAction suggested_action;
6645   gboolean drop_append_mode;
6646
6647   icon_view = GTK_ICON_VIEW (widget);
6648   model = gtk_icon_view_get_model (icon_view);
6649
6650   if (!check_model_dnd (model, GTK_TYPE_TREE_DRAG_DEST, "drag-data-received"))
6651     return;
6652
6653   if (!icon_view->priv->dest_set)
6654     return;
6655
6656   suggested_action = get_status_pending (context);
6657
6658   if (suggested_action)
6659     {
6660       /* We are getting this data due to a request in drag_motion,
6661        * rather than due to a request in drag_drop, so we are just
6662        * supposed to call drag_status, not actually paste in the
6663        * data.
6664        */
6665       path = get_logical_destination (icon_view, &drop_append_mode);
6666
6667       if (path == NULL)
6668         suggested_action = 0;
6669
6670       if (suggested_action)
6671         {
6672           if (!gtk_tree_drag_dest_row_drop_possible (GTK_TREE_DRAG_DEST (model),
6673                                                      path,
6674                                                      selection_data))
6675             suggested_action = 0;
6676         }
6677
6678       gdk_drag_status (context, suggested_action, time);
6679
6680       if (path)
6681         gtk_tree_path_free (path);
6682
6683       /* If you can't drop, remove user drop indicator until the next motion */
6684       if (suggested_action == 0)
6685         gtk_icon_view_set_drag_dest_item (icon_view,
6686                                           NULL,
6687                                           GTK_ICON_VIEW_DROP_LEFT);
6688       return;
6689     }
6690
6691
6692   dest_row = get_dest_row (context);
6693
6694   if (dest_row == NULL)
6695     return;
6696
6697   if (gtk_selection_data_get_length (selection_data) >= 0)
6698     {
6699       if (gtk_tree_drag_dest_drag_data_received (GTK_TREE_DRAG_DEST (model),
6700                                                  dest_row,
6701                                                  selection_data))
6702         accepted = TRUE;
6703     }
6704
6705   gtk_drag_finish (context,
6706                    accepted,
6707                    (gdk_drag_context_get_selected_action (context) == GDK_ACTION_MOVE),
6708                    time);
6709
6710   gtk_tree_path_free (dest_row);
6711
6712   /* drop dest_row */
6713   set_dest_row (context, NULL, NULL, FALSE, FALSE);
6714 }
6715
6716 /* Drag-and-Drop support */
6717 /**
6718  * gtk_icon_view_enable_model_drag_source:
6719  * @icon_view: a #GtkIconTreeView
6720  * @start_button_mask: Mask of allowed buttons to start drag
6721  * @targets: (array length=n_targets): the table of targets that the drag will
6722  *           support
6723  * @n_targets: the number of items in @targets
6724  * @actions: the bitmask of possible actions for a drag from this
6725  *    widget
6726  *
6727  * Turns @icon_view into a drag source for automatic DND. Calling this
6728  * method sets #GtkIconView:reorderable to %FALSE.
6729  *
6730  * Since: 2.8
6731  **/
6732 void
6733 gtk_icon_view_enable_model_drag_source (GtkIconView              *icon_view,
6734                                         GdkModifierType           start_button_mask,
6735                                         const GtkTargetEntry     *targets,
6736                                         gint                      n_targets,
6737                                         GdkDragAction             actions)
6738 {
6739   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
6740
6741   gtk_drag_source_set (GTK_WIDGET (icon_view), 0, targets, n_targets, actions);
6742
6743   icon_view->priv->start_button_mask = start_button_mask;
6744   icon_view->priv->source_actions = actions;
6745
6746   icon_view->priv->source_set = TRUE;
6747
6748   unset_reorderable (icon_view);
6749 }
6750
6751 /**
6752  * gtk_icon_view_enable_model_drag_dest:
6753  * @icon_view: a #GtkIconView
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 to this
6758  *    widget
6759  *
6760  * Turns @icon_view into a drop destination 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_dest (GtkIconView          *icon_view,
6767                                       const GtkTargetEntry *targets,
6768                                       gint                  n_targets,
6769                                       GdkDragAction         actions)
6770 {
6771   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
6772
6773   gtk_drag_dest_set (GTK_WIDGET (icon_view), 0, targets, n_targets, actions);
6774
6775   icon_view->priv->dest_actions = actions;
6776
6777   icon_view->priv->dest_set = TRUE;
6778
6779   unset_reorderable (icon_view);
6780 }
6781
6782 /**
6783  * gtk_icon_view_unset_model_drag_source:
6784  * @icon_view: a #GtkIconView
6785  *
6786  * Undoes the effect of gtk_icon_view_enable_model_drag_source(). Calling this
6787  * method sets #GtkIconView:reorderable to %FALSE.
6788  *
6789  * Since: 2.8
6790  **/
6791 void
6792 gtk_icon_view_unset_model_drag_source (GtkIconView *icon_view)
6793 {
6794   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
6795
6796   if (icon_view->priv->source_set)
6797     {
6798       gtk_drag_source_unset (GTK_WIDGET (icon_view));
6799       icon_view->priv->source_set = FALSE;
6800     }
6801
6802   unset_reorderable (icon_view);
6803 }
6804
6805 /**
6806  * gtk_icon_view_unset_model_drag_dest:
6807  * @icon_view: a #GtkIconView
6808  *
6809  * Undoes the effect of gtk_icon_view_enable_model_drag_dest(). Calling this
6810  * method sets #GtkIconView:reorderable to %FALSE.
6811  *
6812  * Since: 2.8
6813  **/
6814 void
6815 gtk_icon_view_unset_model_drag_dest (GtkIconView *icon_view)
6816 {
6817   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
6818
6819   if (icon_view->priv->dest_set)
6820     {
6821       gtk_drag_dest_unset (GTK_WIDGET (icon_view));
6822       icon_view->priv->dest_set = FALSE;
6823     }
6824
6825   unset_reorderable (icon_view);
6826 }
6827
6828 /* These are useful to implement your own custom stuff. */
6829 /**
6830  * gtk_icon_view_set_drag_dest_item:
6831  * @icon_view: a #GtkIconView
6832  * @path: (allow-none): The path of the item to highlight, or %NULL.
6833  * @pos: Specifies where to drop, relative to the item
6834  *
6835  * Sets the item that is highlighted for feedback.
6836  *
6837  * Since: 2.8
6838  */
6839 void
6840 gtk_icon_view_set_drag_dest_item (GtkIconView              *icon_view,
6841                                   GtkTreePath              *path,
6842                                   GtkIconViewDropPosition   pos)
6843 {
6844   /* Note; this function is exported to allow a custom DND
6845    * implementation, so it can't touch TreeViewDragInfo
6846    */
6847
6848   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
6849
6850   if (icon_view->priv->dest_item)
6851     {
6852       GtkTreePath *current_path;
6853       current_path = gtk_tree_row_reference_get_path (icon_view->priv->dest_item);
6854       gtk_tree_row_reference_free (icon_view->priv->dest_item);
6855       icon_view->priv->dest_item = NULL;
6856
6857       gtk_icon_view_queue_draw_path (icon_view, current_path);
6858       gtk_tree_path_free (current_path);
6859     }
6860
6861   /* special case a drop on an empty model */
6862   icon_view->priv->empty_view_drop = FALSE;
6863   if (pos == GTK_ICON_VIEW_DROP_ABOVE && path
6864       && gtk_tree_path_get_depth (path) == 1
6865       && gtk_tree_path_get_indices (path)[0] == 0)
6866     {
6867       gint n_children;
6868
6869       n_children = gtk_tree_model_iter_n_children (icon_view->priv->model,
6870                                                    NULL);
6871
6872       if (n_children == 0)
6873         icon_view->priv->empty_view_drop = TRUE;
6874     }
6875
6876   icon_view->priv->dest_pos = pos;
6877
6878   if (path)
6879     {
6880       icon_view->priv->dest_item =
6881         gtk_tree_row_reference_new_proxy (G_OBJECT (icon_view),
6882                                           icon_view->priv->model, path);
6883
6884       gtk_icon_view_queue_draw_path (icon_view, path);
6885     }
6886 }
6887
6888 /**
6889  * gtk_icon_view_get_drag_dest_item:
6890  * @icon_view: a #GtkIconView
6891  * @path: (out) (allow-none): Return location for the path of
6892  *        the highlighted item, or %NULL.
6893  * @pos: (out) (allow-none): Return location for the drop position, or %NULL
6894  *
6895  * Gets information about the item that is highlighted for feedback.
6896  *
6897  * Since: 2.8
6898  **/
6899 void
6900 gtk_icon_view_get_drag_dest_item (GtkIconView              *icon_view,
6901                                   GtkTreePath             **path,
6902                                   GtkIconViewDropPosition  *pos)
6903 {
6904   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
6905
6906   if (path)
6907     {
6908       if (icon_view->priv->dest_item)
6909         *path = gtk_tree_row_reference_get_path (icon_view->priv->dest_item);
6910       else
6911         *path = NULL;
6912     }
6913
6914   if (pos)
6915     *pos = icon_view->priv->dest_pos;
6916 }
6917
6918 /**
6919  * gtk_icon_view_get_dest_item_at_pos:
6920  * @icon_view: a #GtkIconView
6921  * @drag_x: the position to determine the destination item for
6922  * @drag_y: the position to determine the destination item for
6923  * @path: (out) (allow-none): Return location for the path of the item,
6924  *    or %NULL.
6925  * @pos: (out) (allow-none): Return location for the drop position, or %NULL
6926  *
6927  * Determines the destination item for a given position.
6928  *
6929  * Return value: whether there is an item at the given position.
6930  *
6931  * Since: 2.8
6932  **/
6933 gboolean
6934 gtk_icon_view_get_dest_item_at_pos (GtkIconView              *icon_view,
6935                                     gint                      drag_x,
6936                                     gint                      drag_y,
6937                                     GtkTreePath             **path,
6938                                     GtkIconViewDropPosition  *pos)
6939 {
6940   GtkIconViewItem *item;
6941
6942   /* Note; this function is exported to allow a custom DND
6943    * implementation, so it can't touch TreeViewDragInfo
6944    */
6945
6946   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
6947   g_return_val_if_fail (drag_x >= 0, FALSE);
6948   g_return_val_if_fail (drag_y >= 0, FALSE);
6949   g_return_val_if_fail (icon_view->priv->bin_window != NULL, FALSE);
6950
6951
6952   if (path)
6953     *path = NULL;
6954
6955   item = _gtk_icon_view_get_item_at_coords (icon_view,
6956                                            drag_x + gtk_adjustment_get_value (icon_view->priv->hadjustment),
6957                                            drag_y + gtk_adjustment_get_value (icon_view->priv->vadjustment),
6958                                            FALSE, NULL);
6959
6960   if (item == NULL)
6961     return FALSE;
6962
6963   if (path)
6964     *path = gtk_tree_path_new_from_indices (item->index, -1);
6965
6966   if (pos)
6967     {
6968       if (drag_x < item->cell_area.x + item->cell_area.width / 4)
6969         *pos = GTK_ICON_VIEW_DROP_LEFT;
6970       else if (drag_x > item->cell_area.x + item->cell_area.width * 3 / 4)
6971         *pos = GTK_ICON_VIEW_DROP_RIGHT;
6972       else if (drag_y < item->cell_area.y + item->cell_area.height / 4)
6973         *pos = GTK_ICON_VIEW_DROP_ABOVE;
6974       else if (drag_y > item->cell_area.y + item->cell_area.height * 3 / 4)
6975         *pos = GTK_ICON_VIEW_DROP_BELOW;
6976       else
6977         *pos = GTK_ICON_VIEW_DROP_INTO;
6978     }
6979
6980   return TRUE;
6981 }
6982
6983 /**
6984  * gtk_icon_view_create_drag_icon:
6985  * @icon_view: a #GtkIconView
6986  * @path: a #GtkTreePath in @icon_view
6987  *
6988  * Creates a #cairo_surface_t representation of the item at @path.
6989  * This image is used for a drag icon.
6990  *
6991  * Return value: (transfer full): a newly-allocated surface of the drag icon.
6992  *
6993  * Since: 2.8
6994  **/
6995 cairo_surface_t *
6996 gtk_icon_view_create_drag_icon (GtkIconView *icon_view,
6997                                 GtkTreePath *path)
6998 {
6999   GtkWidget *widget;
7000   GtkStyleContext *context;
7001   cairo_t *cr;
7002   cairo_surface_t *surface;
7003   GList *l;
7004   gint index;
7005
7006   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), NULL);
7007   g_return_val_if_fail (path != NULL, NULL);
7008
7009   widget = GTK_WIDGET (icon_view);
7010   context = gtk_widget_get_style_context (widget);
7011
7012   if (!gtk_widget_get_realized (widget))
7013     return NULL;
7014
7015   index = gtk_tree_path_get_indices (path)[0];
7016
7017   for (l = icon_view->priv->items; l; l = l->next)
7018     {
7019       GtkIconViewItem *item = l->data;
7020
7021       if (index == item->index)
7022         {
7023           GdkRectangle rect = {
7024             item->cell_area.x - icon_view->priv->item_padding,
7025             item->cell_area.y - icon_view->priv->item_padding,
7026             item->cell_area.width  + icon_view->priv->item_padding * 2,
7027             item->cell_area.height + icon_view->priv->item_padding * 2
7028           };
7029
7030           surface = gdk_window_create_similar_surface (icon_view->priv->bin_window,
7031                                                        CAIRO_CONTENT_COLOR,
7032                                                        rect.width + 2,
7033                                                        rect.height + 2);
7034
7035           cr = cairo_create (surface);
7036           cairo_set_line_width (cr, 1.);
7037
7038           gtk_render_background (context, cr, 0, 0,
7039                                  rect.width + 2, rect.height + 2);
7040
7041           cairo_save (cr);
7042
7043           cairo_rectangle (cr, 1, 1, rect.width, rect.height);
7044           cairo_clip (cr);
7045
7046           gtk_icon_view_paint_item (icon_view, cr, item,
7047                                     icon_view->priv->item_padding + 1,
7048                                     icon_view->priv->item_padding + 1, FALSE);
7049
7050           cairo_restore (cr);
7051
7052           cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
7053           cairo_rectangle (cr, 0.5, 0.5, rect.width + 1, rect.height + 1);
7054           cairo_stroke (cr);
7055
7056           cairo_destroy (cr);
7057
7058           return surface;
7059         }
7060     }
7061
7062   return NULL;
7063 }
7064
7065 /**
7066  * gtk_icon_view_get_reorderable:
7067  * @icon_view: a #GtkIconView
7068  *
7069  * Retrieves whether the user can reorder the list via drag-and-drop.
7070  * See gtk_icon_view_set_reorderable().
7071  *
7072  * Return value: %TRUE if the list can be reordered.
7073  *
7074  * Since: 2.8
7075  **/
7076 gboolean
7077 gtk_icon_view_get_reorderable (GtkIconView *icon_view)
7078 {
7079   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
7080
7081   return icon_view->priv->reorderable;
7082 }
7083
7084 static const GtkTargetEntry item_targets[] = {
7085   { "GTK_TREE_MODEL_ROW", GTK_TARGET_SAME_WIDGET, 0 }
7086 };
7087
7088
7089 /**
7090  * gtk_icon_view_set_reorderable:
7091  * @icon_view: A #GtkIconView.
7092  * @reorderable: %TRUE, if the list of items can be reordered.
7093  *
7094  * This function is a convenience function to allow you to reorder models that
7095  * support the #GtkTreeDragSourceIface and the #GtkTreeDragDestIface.  Both
7096  * #GtkTreeStore and #GtkListStore support these.  If @reorderable is %TRUE, then
7097  * the user can reorder the model by dragging and dropping rows.  The
7098  * developer can listen to these changes by connecting to the model's
7099  * row_inserted and row_deleted signals. The reordering is implemented by setting up
7100  * the icon view as a drag source and destination. Therefore, drag and
7101  * drop can not be used in a reorderable view for any other purpose.
7102  *
7103  * This function does not give you any degree of control over the order -- any
7104  * reordering is allowed.  If more control is needed, you should probably
7105  * handle drag and drop manually.
7106  *
7107  * Since: 2.8
7108  **/
7109 void
7110 gtk_icon_view_set_reorderable (GtkIconView *icon_view,
7111                                gboolean     reorderable)
7112 {
7113   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
7114
7115   reorderable = reorderable != FALSE;
7116
7117   if (icon_view->priv->reorderable == reorderable)
7118     return;
7119
7120   if (reorderable)
7121     {
7122       gtk_icon_view_enable_model_drag_source (icon_view,
7123                                               GDK_BUTTON1_MASK,
7124                                               item_targets,
7125                                               G_N_ELEMENTS (item_targets),
7126                                               GDK_ACTION_MOVE);
7127       gtk_icon_view_enable_model_drag_dest (icon_view,
7128                                             item_targets,
7129                                             G_N_ELEMENTS (item_targets),
7130                                             GDK_ACTION_MOVE);
7131     }
7132   else
7133     {
7134       gtk_icon_view_unset_model_drag_source (icon_view);
7135       gtk_icon_view_unset_model_drag_dest (icon_view);
7136     }
7137
7138   icon_view->priv->reorderable = reorderable;
7139
7140   g_object_notify (G_OBJECT (icon_view), "reorderable");
7141 }
7142
7143 static gboolean
7144 gtk_icon_view_buildable_custom_tag_start (GtkBuildable  *buildable,
7145                                           GtkBuilder    *builder,
7146                                           GObject       *child,
7147                                           const gchar   *tagname,
7148                                           GMarkupParser *parser,
7149                                           gpointer      *data)
7150 {
7151   if (parent_buildable_iface->custom_tag_start (buildable, builder, child,
7152                                                 tagname, parser, data))
7153     return TRUE;
7154
7155   return _gtk_cell_layout_buildable_custom_tag_start (buildable, builder, child,
7156                                                       tagname, parser, data);
7157 }
7158
7159 static void
7160 gtk_icon_view_buildable_custom_tag_end (GtkBuildable *buildable,
7161                                         GtkBuilder   *builder,
7162                                         GObject      *child,
7163                                         const gchar  *tagname,
7164                                         gpointer     *data)
7165 {
7166   if (!_gtk_cell_layout_buildable_custom_tag_end (buildable, builder,
7167                                                   child, tagname, data))
7168     parent_buildable_iface->custom_tag_end (buildable, builder,
7169                                             child, tagname, data);
7170 }