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 static void
1397 cell_area_get_preferred_size (GtkIconView        *icon_view,
1398                               GtkCellAreaContext *context,
1399                               GtkOrientation      orientation,
1400                               gint                for_size,
1401                               gint               *minimum,
1402                               gint               *natural)
1403 {
1404   if (orientation == GTK_ORIENTATION_HORIZONTAL)
1405     {
1406       if (for_size > 0)
1407         gtk_cell_area_get_preferred_width_for_height (icon_view->priv->cell_area,
1408                                                       context,
1409                                                       GTK_WIDGET (icon_view),
1410                                                       for_size,
1411                                                       minimum, natural);
1412       else
1413         gtk_cell_area_get_preferred_width (icon_view->priv->cell_area,
1414                                            context,
1415                                            GTK_WIDGET (icon_view),
1416                                            minimum, natural);
1417     }
1418   else
1419     {
1420       if (for_size > 0)
1421         gtk_cell_area_get_preferred_height_for_width (icon_view->priv->cell_area,
1422                                                       context,
1423                                                       GTK_WIDGET (icon_view),
1424                                                       for_size,
1425                                                       minimum, natural);
1426       else
1427         gtk_cell_area_get_preferred_height (icon_view->priv->cell_area,
1428                                             context,
1429                                             GTK_WIDGET (icon_view),
1430                                             minimum, natural);
1431     }
1432 }
1433
1434 static void
1435 gtk_icon_view_get_preferred_item_size (GtkIconView    *icon_view,
1436                                        GtkOrientation  orientation,
1437                                        gint            for_size,
1438                                        gint           *minimum,
1439                                        gint           *natural)
1440 {
1441   GtkIconViewPrivate *priv = icon_view->priv;
1442   GtkCellAreaContext *context;
1443   GList *items;
1444
1445   context = gtk_cell_area_create_context (priv->cell_area);
1446
1447   for_size -= 2 * priv->item_padding;
1448
1449   if (for_size > 0)
1450     {
1451       /* This is necessary for the context to work properly */
1452       for (items = priv->items; items; items = items->next)
1453         {
1454           GtkIconViewItem *item = items->data;
1455
1456           _gtk_icon_view_set_cell_data (icon_view, item);
1457           cell_area_get_preferred_size (icon_view, context, 1 - orientation, -1, NULL, NULL);
1458         }
1459     }
1460
1461   for (items = priv->items; items; items = items->next)
1462     {
1463       GtkIconViewItem *item = items->data;
1464
1465       _gtk_icon_view_set_cell_data (icon_view, item);
1466       if (items == priv->items)
1467         adjust_wrap_width (icon_view);
1468       cell_area_get_preferred_size (icon_view, context, orientation, for_size, NULL, NULL);
1469     }
1470
1471   if (orientation == GTK_ORIENTATION_HORIZONTAL)
1472     {
1473       if (for_size > 0)
1474         gtk_cell_area_context_get_preferred_width_for_height (context,
1475                                                               for_size,
1476                                                               minimum, natural);
1477       else
1478         gtk_cell_area_context_get_preferred_width (context,
1479                                                    minimum, natural);
1480     }
1481   else
1482     {
1483       if (for_size > 0)
1484         gtk_cell_area_context_get_preferred_height_for_width (context,
1485                                                               for_size,
1486                                                               minimum, natural);
1487       else
1488         gtk_cell_area_context_get_preferred_height (context,
1489                                                     minimum, natural);
1490     }
1491
1492   if (orientation == GTK_ORIENTATION_HORIZONTAL && priv->item_width >= 0)
1493     {
1494       if (minimum)
1495         *minimum = MAX (*minimum, priv->item_width);
1496       if (natural)
1497         *natural = *minimum;
1498     }
1499
1500   if (minimum)
1501     *minimum += 2 * priv->item_padding;
1502   if (natural)
1503     *natural += 2 * priv->item_padding;
1504
1505   g_object_unref (context);
1506 }
1507
1508 static void
1509 gtk_icon_view_compute_n_items_for_size (GtkIconView    *icon_view,
1510                                         GtkOrientation  orientation,
1511                                         gint            size,
1512                                         gint           *min_items,
1513                                         gint           *min_item_size,
1514                                         gint           *max_items,
1515                                         gint           *max_item_size)
1516 {
1517   GtkIconViewPrivate *priv = icon_view->priv;
1518   int minimum, natural;
1519
1520   g_return_if_fail (min_item_size == NULL || min_items != NULL);
1521   g_return_if_fail (max_item_size == NULL || max_items != NULL);
1522
1523   gtk_icon_view_get_preferred_item_size (icon_view, orientation, -1, &minimum, &natural);
1524
1525   size -= 2 * priv->margin;
1526   if (orientation == GTK_ORIENTATION_HORIZONTAL)
1527     size += priv->column_spacing;
1528   else
1529     size += priv->row_spacing;
1530
1531   if (priv->columns > 0)
1532     {
1533       if (orientation == GTK_ORIENTATION_HORIZONTAL)
1534         {
1535           if (min_items)
1536             *min_items = priv->columns;
1537           if (max_items)
1538             *max_items = priv->columns;
1539         }
1540       else
1541         {
1542           int n_items = gtk_icon_view_get_n_items (icon_view);
1543
1544           if (min_items)
1545             *min_items = (n_items + priv->columns - 1) / priv->columns;
1546           if (max_items)
1547             *max_items = (n_items + priv->columns - 1) / priv->columns;
1548         }
1549     }
1550   else
1551     {
1552       if (orientation == GTK_ORIENTATION_HORIZONTAL)
1553         {
1554           minimum += priv->column_spacing;
1555           natural += priv->column_spacing;
1556         }
1557       else
1558         {
1559           minimum += priv->row_spacing;
1560           natural += priv->row_spacing;
1561         }
1562
1563       if (max_items)
1564         {
1565           if (size <= minimum)
1566             *max_items = 1;
1567           else
1568             *max_items = size / minimum;
1569         }
1570
1571       if (min_items)
1572         {
1573           if (size <= natural)
1574             *min_items = 1;
1575           else
1576             *min_items = size / natural;
1577         }
1578     }
1579
1580   if (min_item_size)
1581     {
1582       *min_item_size = size / *min_items;
1583       if (orientation == GTK_ORIENTATION_HORIZONTAL)
1584         *min_item_size -= priv->column_spacing;
1585       else
1586         *min_item_size -= priv->row_spacing;
1587       *min_item_size = MIN (*min_item_size, natural);
1588       *min_item_size -= 2 * priv->item_padding;
1589     }
1590
1591   if (max_item_size)
1592     {
1593       *max_item_size = size / *max_items;
1594       if (orientation == GTK_ORIENTATION_HORIZONTAL)
1595         *max_item_size -= priv->column_spacing;
1596       else
1597         *max_item_size -= priv->row_spacing;
1598       *max_item_size = MIN (*max_item_size, natural);
1599       *max_item_size -= 2 * priv->item_padding;
1600     }
1601 }
1602
1603 static GtkSizeRequestMode
1604 gtk_icon_view_get_request_mode (GtkWidget *widget)
1605 {
1606   return GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH;
1607 }
1608
1609 static void
1610 gtk_icon_view_get_preferred_width (GtkWidget *widget,
1611                                    gint      *minimum,
1612                                    gint      *natural)
1613 {
1614   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
1615   GtkIconViewPrivate *priv = icon_view->priv;
1616   int item_min, item_nat;
1617
1618   gtk_icon_view_get_preferred_item_size (icon_view, GTK_ORIENTATION_HORIZONTAL, -1, &item_min, &item_nat);
1619
1620   if (priv->columns > 0)
1621     {
1622       *minimum = item_min * priv->columns + priv->column_spacing * (priv->columns - 1);
1623       *natural = item_nat * priv->columns + priv->column_spacing * (priv->columns - 1);
1624     }
1625   else
1626     {
1627       int n_items = gtk_icon_view_get_n_items (icon_view);
1628
1629       if (n_items == 0)
1630         {
1631           *minimum = 0;
1632           *natural = 0;
1633         }
1634       else
1635         {
1636           *minimum = item_min;
1637           *natural = item_nat * n_items + priv->column_spacing * (n_items - 1);
1638         }
1639     }
1640
1641   *minimum += 2 * priv->margin;
1642   *natural += 2 * priv->margin;
1643 }
1644
1645 static void
1646 gtk_icon_view_get_preferred_width_for_height (GtkWidget *widget,
1647                                               gint       height,
1648                                               gint      *minimum,
1649                                               gint      *natural)
1650 {
1651   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
1652   GtkIconViewPrivate *priv = icon_view->priv;
1653   int item_min, item_nat, rows, row_height, n_items;
1654
1655   gtk_icon_view_compute_n_items_for_size (icon_view, GTK_ORIENTATION_VERTICAL, height, &rows, &row_height, NULL, NULL);
1656   n_items = gtk_icon_view_get_n_items (icon_view);
1657
1658   gtk_icon_view_get_preferred_item_size (icon_view, GTK_ORIENTATION_HORIZONTAL, row_height, &item_min, &item_nat);
1659   *minimum = item_min * ((n_items + rows - 1) / rows);
1660   *natural = item_nat * ((n_items + rows - 1) / rows);
1661
1662   *minimum += 2 * priv->margin;
1663   *natural += 2 * priv->margin;
1664 }
1665
1666 static void
1667 gtk_icon_view_get_preferred_height (GtkWidget *widget,
1668                                     gint      *minimum,
1669                                     gint      *natural)
1670 {
1671   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
1672   GtkIconViewPrivate *priv = icon_view->priv;
1673   int item_min, item_nat, n_items;
1674
1675   gtk_icon_view_get_preferred_item_size (icon_view, GTK_ORIENTATION_VERTICAL, -1, &item_min, &item_nat);
1676   n_items = gtk_icon_view_get_n_items (icon_view);
1677
1678   if (priv->columns > 0)
1679     {
1680       int n_rows = (n_items + priv->columns - 1) / priv->columns;
1681
1682       *minimum = item_min * n_rows + priv->row_spacing * (n_rows - 1);
1683       *natural = item_nat * n_rows + priv->row_spacing * (n_rows - 1);
1684     }
1685   else
1686     {
1687       if (n_items == 0)
1688         {
1689           *minimum = 0;
1690           *natural = 0;
1691         }
1692       else
1693         {
1694           *minimum = item_min;
1695           *natural = item_nat * n_items + priv->row_spacing * (n_items - 1);
1696         }
1697     }
1698
1699   *minimum += 2 * priv->margin;
1700   *natural += 2 * priv->margin;
1701 }
1702
1703 static void
1704 gtk_icon_view_get_preferred_height_for_width (GtkWidget *widget,
1705                                               gint       width,
1706                                               gint      *minimum,
1707                                               gint      *natural)
1708 {
1709   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
1710   GtkIconViewPrivate *priv = icon_view->priv;
1711   int item_min, item_nat, columns, column_width, n_items;
1712
1713   gtk_icon_view_compute_n_items_for_size (icon_view, GTK_ORIENTATION_HORIZONTAL, width, NULL, NULL, &columns, &column_width);
1714   n_items = gtk_icon_view_get_n_items (icon_view);
1715
1716   gtk_icon_view_get_preferred_item_size (icon_view, GTK_ORIENTATION_VERTICAL, column_width, &item_min, &item_nat);
1717   *minimum = (item_min + priv->row_spacing) * ((n_items + columns - 1) / columns) - priv->row_spacing;
1718   *natural = (item_nat + priv->row_spacing) * ((n_items + columns - 1) / columns) - priv->row_spacing;
1719
1720   *minimum += 2 * priv->margin;
1721   *natural += 2 * priv->margin;
1722 }
1723
1724 static void
1725 gtk_icon_view_allocate_children (GtkIconView *icon_view)
1726 {
1727   GList *list;
1728
1729   for (list = icon_view->priv->children; list; list = list->next)
1730     {
1731       GtkIconViewChild *child = list->data;
1732
1733       /* totally ignore our child's requisition */
1734       gtk_widget_size_allocate (child->widget, &child->area);
1735     }
1736 }
1737
1738 static void
1739 gtk_icon_view_size_allocate (GtkWidget      *widget,
1740                              GtkAllocation  *allocation)
1741 {
1742   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
1743
1744   gtk_widget_set_allocation (widget, allocation);
1745
1746   gtk_icon_view_layout (icon_view);
1747
1748   if (gtk_widget_get_realized (widget))
1749     {
1750       gdk_window_move_resize (gtk_widget_get_window (widget),
1751                               allocation->x, allocation->y,
1752                               allocation->width, allocation->height);
1753       gdk_window_resize (icon_view->priv->bin_window,
1754                          MAX (icon_view->priv->width, allocation->width),
1755                          MAX (icon_view->priv->height, allocation->height));
1756     }
1757
1758   gtk_icon_view_allocate_children (icon_view);
1759
1760   /* Delay signal emission */
1761   g_object_freeze_notify (G_OBJECT (icon_view->priv->hadjustment));
1762   g_object_freeze_notify (G_OBJECT (icon_view->priv->vadjustment));
1763
1764   gtk_icon_view_set_hadjustment_values (icon_view);
1765   gtk_icon_view_set_vadjustment_values (icon_view);
1766
1767   if (gtk_widget_get_realized (widget) &&
1768       icon_view->priv->scroll_to_path)
1769     {
1770       GtkTreePath *path;
1771       path = gtk_tree_row_reference_get_path (icon_view->priv->scroll_to_path);
1772       gtk_tree_row_reference_free (icon_view->priv->scroll_to_path);
1773       icon_view->priv->scroll_to_path = NULL;
1774
1775       gtk_icon_view_scroll_to_path (icon_view, path,
1776                                     icon_view->priv->scroll_to_use_align,
1777                                     icon_view->priv->scroll_to_row_align,
1778                                     icon_view->priv->scroll_to_col_align);
1779       gtk_tree_path_free (path);
1780     }
1781
1782   /* Emit any pending signals now */
1783   g_object_thaw_notify (G_OBJECT (icon_view->priv->hadjustment));
1784   g_object_thaw_notify (G_OBJECT (icon_view->priv->vadjustment));
1785 }
1786
1787 static gboolean
1788 gtk_icon_view_draw (GtkWidget *widget,
1789                     cairo_t   *cr)
1790 {
1791   GtkIconView *icon_view;
1792   GList *icons;
1793   GtkTreePath *path;
1794   gint dest_index;
1795   GtkIconViewDropPosition dest_pos;
1796   GtkIconViewItem *dest_item = NULL;
1797
1798   icon_view = GTK_ICON_VIEW (widget);
1799
1800   if (!gtk_cairo_should_draw_window (cr, icon_view->priv->bin_window))
1801     return FALSE;
1802
1803   cairo_save (cr);
1804
1805   gtk_cairo_transform_to_window (cr, widget, icon_view->priv->bin_window);
1806
1807   cairo_set_line_width (cr, 1.);
1808
1809   gtk_icon_view_get_drag_dest_item (icon_view, &path, &dest_pos);
1810
1811   if (path)
1812     {
1813       dest_index = gtk_tree_path_get_indices (path)[0];
1814       gtk_tree_path_free (path);
1815     }
1816   else
1817     dest_index = -1;
1818
1819   for (icons = icon_view->priv->items; icons; icons = icons->next)
1820     {
1821       GtkIconViewItem *item = icons->data;
1822       GdkRectangle paint_area;
1823
1824       paint_area.x      = item->cell_area.x      - icon_view->priv->item_padding;
1825       paint_area.y      = item->cell_area.y      - icon_view->priv->item_padding;
1826       paint_area.width  = item->cell_area.width  + icon_view->priv->item_padding * 2;
1827       paint_area.height = item->cell_area.height + icon_view->priv->item_padding * 2;
1828
1829       cairo_save (cr);
1830
1831       cairo_rectangle (cr, paint_area.x, paint_area.y, paint_area.width, paint_area.height);
1832       cairo_clip (cr);
1833
1834       if (gdk_cairo_get_clip_rectangle (cr, NULL))
1835         {
1836           gtk_icon_view_paint_item (icon_view, cr, item,
1837                                     item->cell_area.x, item->cell_area.y,
1838                                     icon_view->priv->draw_focus);
1839
1840           if (dest_index == item->index)
1841             dest_item = item;
1842         }
1843
1844       cairo_restore (cr);
1845     }
1846
1847   if (dest_item &&
1848       dest_pos != GTK_ICON_VIEW_NO_DROP)
1849     {
1850       GtkStyleContext *context;
1851       GdkRectangle rect = { 0 };
1852
1853       context = gtk_widget_get_style_context (widget);
1854
1855       switch (dest_pos)
1856         {
1857         case GTK_ICON_VIEW_DROP_INTO:
1858           rect = dest_item->cell_area;
1859           break;
1860         case GTK_ICON_VIEW_DROP_ABOVE:
1861           rect.x = dest_item->cell_area.x;
1862           rect.y = dest_item->cell_area.y - 1;
1863           rect.width = dest_item->cell_area.width;
1864           rect.height = 2;
1865           break;
1866         case GTK_ICON_VIEW_DROP_LEFT:
1867           rect.x = dest_item->cell_area.x - 1;
1868           rect.y = dest_item->cell_area.y;
1869           rect.width = 2;
1870           rect.height = dest_item->cell_area.height;
1871           break;
1872         case GTK_ICON_VIEW_DROP_BELOW:
1873           rect.x = dest_item->cell_area.x;
1874           rect.y = dest_item->cell_area.y + dest_item->cell_area.height - 1;
1875           rect.width = dest_item->cell_area.width;
1876           rect.height = 2;
1877           break;
1878         case GTK_ICON_VIEW_DROP_RIGHT:
1879           rect.x = dest_item->cell_area.x + dest_item->cell_area.width - 1;
1880           rect.y = dest_item->cell_area.y;
1881           rect.width = 2;
1882           rect.height = dest_item->cell_area.height;
1883         case GTK_ICON_VIEW_NO_DROP: ;
1884           break;
1885         }
1886
1887       gtk_render_focus (context, cr,
1888                         rect.x, rect.y,
1889                         rect.width, rect.height);
1890     }
1891
1892   if (icon_view->priv->doing_rubberband)
1893     gtk_icon_view_paint_rubberband (icon_view, cr);
1894
1895   cairo_restore (cr);
1896
1897   return GTK_WIDGET_CLASS (gtk_icon_view_parent_class)->draw (widget, cr);
1898 }
1899
1900 static gboolean
1901 rubberband_scroll_timeout (gpointer data)
1902 {
1903   GtkIconView *icon_view = data;
1904
1905   gtk_adjustment_set_value (icon_view->priv->vadjustment,
1906                             gtk_adjustment_get_value (icon_view->priv->vadjustment) +
1907                             icon_view->priv->scroll_value_diff);
1908
1909   gtk_icon_view_update_rubberband (icon_view);
1910
1911   return TRUE;
1912 }
1913
1914 static gboolean
1915 gtk_icon_view_motion (GtkWidget      *widget,
1916                       GdkEventMotion *event)
1917 {
1918   GtkAllocation allocation;
1919   GtkIconView *icon_view;
1920   gint abs_y;
1921
1922   icon_view = GTK_ICON_VIEW (widget);
1923
1924   gtk_icon_view_maybe_begin_drag (icon_view, event);
1925
1926   if (icon_view->priv->doing_rubberband)
1927     {
1928       gtk_icon_view_update_rubberband (widget);
1929
1930       abs_y = event->y - icon_view->priv->height *
1931         (gtk_adjustment_get_value (icon_view->priv->vadjustment) /
1932          (gtk_adjustment_get_upper (icon_view->priv->vadjustment) -
1933           gtk_adjustment_get_lower (icon_view->priv->vadjustment)));
1934
1935       gtk_widget_get_allocation (widget, &allocation);
1936
1937       if (abs_y < 0 || abs_y > allocation.height)
1938         {
1939           if (abs_y < 0)
1940             icon_view->priv->scroll_value_diff = abs_y;
1941           else
1942             icon_view->priv->scroll_value_diff = abs_y - allocation.height;
1943
1944           icon_view->priv->event_last_x = event->x;
1945           icon_view->priv->event_last_y = event->y;
1946
1947           if (icon_view->priv->scroll_timeout_id == 0)
1948             icon_view->priv->scroll_timeout_id = gdk_threads_add_timeout (30, rubberband_scroll_timeout,
1949                                                                 icon_view);
1950         }
1951       else
1952         remove_scroll_timeout (icon_view);
1953     }
1954   else
1955     {
1956       GtkIconViewItem *item, *last_prelight_item;
1957       GtkCellRenderer *cell = NULL;
1958
1959       last_prelight_item = icon_view->priv->last_prelight;
1960       item = _gtk_icon_view_get_item_at_coords (icon_view,
1961                                                event->x, event->y,
1962                                                FALSE,
1963                                                &cell);
1964
1965       if (item != NULL)
1966         {
1967           item->prelight = TRUE;
1968           gtk_icon_view_queue_draw_item (icon_view, item);
1969         }
1970
1971       if (last_prelight_item != NULL &&
1972           last_prelight_item != item)
1973         {
1974           last_prelight_item->prelight = FALSE;
1975           gtk_icon_view_queue_draw_item (icon_view,
1976                                          icon_view->priv->last_prelight);
1977         }
1978
1979       icon_view->priv->last_prelight = item;
1980     }
1981
1982   return TRUE;
1983 }
1984
1985 static void
1986 gtk_icon_view_remove (GtkContainer *container,
1987                       GtkWidget    *widget)
1988 {
1989   GtkIconView *icon_view;
1990   GtkIconViewChild *child = NULL;
1991   GList *tmp_list;
1992
1993   icon_view = GTK_ICON_VIEW (container);
1994
1995   tmp_list = icon_view->priv->children;
1996   while (tmp_list)
1997     {
1998       child = tmp_list->data;
1999       if (child->widget == widget)
2000         {
2001           gtk_widget_unparent (widget);
2002
2003           icon_view->priv->children = g_list_remove_link (icon_view->priv->children, tmp_list);
2004           g_list_free_1 (tmp_list);
2005           g_free (child);
2006           return;
2007         }
2008
2009       tmp_list = tmp_list->next;
2010     }
2011 }
2012
2013 static void
2014 gtk_icon_view_forall (GtkContainer *container,
2015                       gboolean      include_internals,
2016                       GtkCallback   callback,
2017                       gpointer      callback_data)
2018 {
2019   GtkIconView *icon_view;
2020   GtkIconViewChild *child = NULL;
2021   GList *tmp_list;
2022
2023   icon_view = GTK_ICON_VIEW (container);
2024
2025   tmp_list = icon_view->priv->children;
2026   while (tmp_list)
2027     {
2028       child = tmp_list->data;
2029       tmp_list = tmp_list->next;
2030
2031       (* callback) (child->widget, callback_data);
2032     }
2033 }
2034
2035 static void
2036 gtk_icon_view_item_selected_changed (GtkIconView      *icon_view,
2037                                      GtkIconViewItem  *item)
2038 {
2039   AtkObject *obj;
2040   AtkObject *item_obj;
2041
2042   obj = gtk_widget_get_accessible (GTK_WIDGET (icon_view));
2043   if (obj != NULL)
2044     {
2045       item_obj = atk_object_ref_accessible_child (obj, item->index);
2046       if (item_obj != NULL)
2047         {
2048           atk_object_notify_state_change (item_obj, ATK_STATE_SELECTED, item->selected);
2049           g_object_unref (item_obj);
2050         }
2051     }
2052 }
2053
2054 static void
2055 gtk_icon_view_add_editable (GtkCellArea            *area,
2056                             GtkCellRenderer        *renderer,
2057                             GtkCellEditable        *editable,
2058                             GdkRectangle           *cell_area,
2059                             const gchar            *path,
2060                             GtkIconView            *icon_view)
2061 {
2062   GtkIconViewChild *child;
2063   GtkWidget *widget = GTK_WIDGET (editable);
2064
2065   child = g_new (GtkIconViewChild, 1);
2066
2067   child->widget      = widget;
2068   child->area.x      = cell_area->x;
2069   child->area.y      = cell_area->y;
2070   child->area.width  = cell_area->width;
2071   child->area.height = cell_area->height;
2072
2073   icon_view->priv->children = g_list_append (icon_view->priv->children, child);
2074
2075   if (gtk_widget_get_realized (GTK_WIDGET (icon_view)))
2076     gtk_widget_set_parent_window (child->widget, icon_view->priv->bin_window);
2077
2078   gtk_widget_set_parent (widget, GTK_WIDGET (icon_view));
2079 }
2080
2081 static void
2082 gtk_icon_view_remove_editable (GtkCellArea            *area,
2083                                GtkCellRenderer        *renderer,
2084                                GtkCellEditable        *editable,
2085                                GtkIconView            *icon_view)
2086 {
2087   GtkTreePath *path;
2088
2089   if (gtk_widget_has_focus (GTK_WIDGET (editable)))
2090     gtk_widget_grab_focus (GTK_WIDGET (icon_view));
2091
2092   gtk_container_remove (GTK_CONTAINER (icon_view),
2093                         GTK_WIDGET (editable));
2094
2095   path = gtk_tree_path_new_from_string (gtk_cell_area_get_current_path_string (area));
2096   gtk_icon_view_queue_draw_path (icon_view, path);
2097   gtk_tree_path_free (path);
2098 }
2099
2100 /**
2101  * gtk_icon_view_set_cursor:
2102  * @icon_view: A #GtkIconView
2103  * @path: A #GtkTreePath
2104  * @cell: (allow-none): One of the cell renderers of @icon_view, or %NULL
2105  * @start_editing: %TRUE if the specified cell should start being edited.
2106  *
2107  * Sets the current keyboard focus to be at @path, and selects it.  This is
2108  * useful when you want to focus the user's attention on a particular item.
2109  * If @cell is not %NULL, then focus is given to the cell specified by
2110  * it. Additionally, if @start_editing is %TRUE, then editing should be
2111  * started in the specified cell.
2112  *
2113  * This function is often followed by <literal>gtk_widget_grab_focus
2114  * (icon_view)</literal> in order to give keyboard focus to the widget.
2115  * Please note that editing can only happen when the widget is realized.
2116  *
2117  * Since: 2.8
2118  **/
2119 void
2120 gtk_icon_view_set_cursor (GtkIconView     *icon_view,
2121                           GtkTreePath     *path,
2122                           GtkCellRenderer *cell,
2123                           gboolean         start_editing)
2124 {
2125   GtkIconViewItem *item = NULL;
2126
2127   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
2128   g_return_if_fail (path != NULL);
2129   g_return_if_fail (cell == NULL || GTK_IS_CELL_RENDERER (cell));
2130
2131   if (icon_view->priv->cell_area)
2132     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
2133
2134   if (gtk_tree_path_get_depth (path) == 1)
2135     item = g_list_nth_data (icon_view->priv->items,
2136                             gtk_tree_path_get_indices(path)[0]);
2137
2138   if (!item)
2139     return;
2140
2141   _gtk_icon_view_set_cursor_item (icon_view, item, cell);
2142   gtk_icon_view_scroll_to_path (icon_view, path, FALSE, 0.0, 0.0);
2143
2144   if (start_editing &&
2145       icon_view->priv->cell_area)
2146     {
2147       GtkCellAreaContext *context;
2148
2149       context = g_ptr_array_index (icon_view->priv->row_contexts, item->row);
2150       _gtk_icon_view_set_cell_data (icon_view, item);
2151       gtk_cell_area_activate (icon_view->priv->cell_area, context,
2152                               GTK_WIDGET (icon_view), &item->cell_area,
2153                               0 /* XXX flags */, TRUE);
2154     }
2155 }
2156
2157 /**
2158  * gtk_icon_view_get_cursor:
2159  * @icon_view: A #GtkIconView
2160  * @path: (out) (allow-none): Return location for the current cursor path,
2161  *        or %NULL
2162  * @cell: (out) (allow-none): Return location the current focus cell, or %NULL
2163  *
2164  * Fills in @path and @cell with the current cursor path and cell.
2165  * If the cursor isn't currently set, then *@path will be %NULL.
2166  * If no cell currently has focus, then *@cell will be %NULL.
2167  *
2168  * The returned #GtkTreePath must be freed with gtk_tree_path_free().
2169  *
2170  * Return value: %TRUE if the cursor is set.
2171  *
2172  * Since: 2.8
2173  **/
2174 gboolean
2175 gtk_icon_view_get_cursor (GtkIconView      *icon_view,
2176                           GtkTreePath     **path,
2177                           GtkCellRenderer **cell)
2178 {
2179   GtkIconViewItem *item;
2180
2181   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
2182
2183   item = icon_view->priv->cursor_item;
2184
2185   if (path != NULL)
2186     {
2187       if (item != NULL)
2188         *path = gtk_tree_path_new_from_indices (item->index, -1);
2189       else
2190         *path = NULL;
2191     }
2192
2193   if (cell != NULL && item != NULL && icon_view->priv->cell_area != NULL)
2194     *cell = gtk_cell_area_get_focus_cell (icon_view->priv->cell_area);
2195
2196   return (item != NULL);
2197 }
2198
2199 static gboolean
2200 gtk_icon_view_button_press (GtkWidget      *widget,
2201                             GdkEventButton *event)
2202 {
2203   GtkIconView *icon_view;
2204   GtkIconViewItem *item;
2205   gboolean dirty = FALSE;
2206   GtkCellRenderer *cell = NULL, *cursor_cell = NULL;
2207
2208   icon_view = GTK_ICON_VIEW (widget);
2209
2210   if (event->window != icon_view->priv->bin_window)
2211     return FALSE;
2212
2213   if (!gtk_widget_has_focus (widget))
2214     gtk_widget_grab_focus (widget);
2215
2216   if (event->button == GDK_BUTTON_PRIMARY && event->type == GDK_BUTTON_PRESS)
2217     {
2218       GdkModifierType extend_mod_mask;
2219       GdkModifierType modify_mod_mask;
2220
2221       extend_mod_mask =
2222         gtk_widget_get_modifier_mask (widget, GDK_MODIFIER_INTENT_EXTEND_SELECTION);
2223
2224       modify_mod_mask =
2225         gtk_widget_get_modifier_mask (widget, GDK_MODIFIER_INTENT_MODIFY_SELECTION);
2226
2227       item = _gtk_icon_view_get_item_at_coords (icon_view,
2228                                                event->x, event->y,
2229                                                FALSE,
2230                                                &cell);
2231
2232       /*
2233        * We consider only the the cells' area as the item area if the
2234        * item is not selected, but if it *is* selected, the complete
2235        * selection rectangle is considered to be part of the item.
2236        */
2237       if (item != NULL && (cell != NULL || item->selected))
2238         {
2239           if (cell != NULL)
2240             {
2241               if (gtk_cell_renderer_is_activatable (cell))
2242                 cursor_cell = cell;
2243             }
2244
2245           gtk_icon_view_scroll_to_item (icon_view, item);
2246
2247           if (icon_view->priv->selection_mode == GTK_SELECTION_NONE)
2248             {
2249               _gtk_icon_view_set_cursor_item (icon_view, item, cursor_cell);
2250             }
2251           else if (icon_view->priv->selection_mode == GTK_SELECTION_MULTIPLE &&
2252                    (event->state & extend_mod_mask))
2253             {
2254               gtk_icon_view_unselect_all_internal (icon_view);
2255
2256               _gtk_icon_view_set_cursor_item (icon_view, item, cursor_cell);
2257               if (!icon_view->priv->anchor_item)
2258                 icon_view->priv->anchor_item = item;
2259               else
2260                 gtk_icon_view_select_all_between (icon_view,
2261                                                   icon_view->priv->anchor_item,
2262                                                   item);
2263               dirty = TRUE;
2264             }
2265           else
2266             {
2267               if ((icon_view->priv->selection_mode == GTK_SELECTION_MULTIPLE ||
2268                   ((icon_view->priv->selection_mode == GTK_SELECTION_SINGLE) && item->selected)) &&
2269                   (event->state & modify_mod_mask))
2270                 {
2271                   item->selected = !item->selected;
2272                   gtk_icon_view_queue_draw_item (icon_view, item);
2273                   dirty = TRUE;
2274                 }
2275               else
2276                 {
2277                   gtk_icon_view_unselect_all_internal (icon_view);
2278
2279                   item->selected = TRUE;
2280                   gtk_icon_view_queue_draw_item (icon_view, item);
2281                   dirty = TRUE;
2282                 }
2283               _gtk_icon_view_set_cursor_item (icon_view, item, cursor_cell);
2284               icon_view->priv->anchor_item = item;
2285             }
2286
2287           /* Save press to possibly begin a drag */
2288           if (icon_view->priv->pressed_button < 0)
2289             {
2290               icon_view->priv->pressed_button = event->button;
2291               icon_view->priv->press_start_x = event->x;
2292               icon_view->priv->press_start_y = event->y;
2293             }
2294
2295           if (!icon_view->priv->last_single_clicked)
2296             icon_view->priv->last_single_clicked = item;
2297
2298           /* cancel the current editing, if it exists */
2299           gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
2300
2301           if (cell != NULL && gtk_cell_renderer_is_activatable (cell))
2302             {
2303               GtkCellAreaContext *context;
2304
2305               context = g_ptr_array_index (icon_view->priv->row_contexts, item->row);
2306
2307               _gtk_icon_view_set_cell_data (icon_view, item);
2308               gtk_cell_area_activate (icon_view->priv->cell_area, context,
2309                                       GTK_WIDGET (icon_view),
2310                                       &item->cell_area, 0/* XXX flags */, FALSE);
2311             }
2312         }
2313       else
2314         {
2315           if (icon_view->priv->selection_mode != GTK_SELECTION_BROWSE &&
2316               !(event->state & modify_mod_mask))
2317             {
2318               dirty = gtk_icon_view_unselect_all_internal (icon_view);
2319             }
2320
2321           if (icon_view->priv->selection_mode == GTK_SELECTION_MULTIPLE)
2322             gtk_icon_view_start_rubberbanding (icon_view, event->device, event->x, event->y);
2323         }
2324
2325       /* don't draw keyboard focus around an clicked-on item */
2326       icon_view->priv->draw_focus = FALSE;
2327     }
2328
2329   if (event->button == GDK_BUTTON_PRIMARY && event->type == GDK_2BUTTON_PRESS)
2330     {
2331       item = _gtk_icon_view_get_item_at_coords (icon_view,
2332                                                event->x, event->y,
2333                                                FALSE,
2334                                                NULL);
2335
2336       if (item && item == icon_view->priv->last_single_clicked)
2337         {
2338           GtkTreePath *path;
2339
2340           path = gtk_tree_path_new_from_indices (item->index, -1);
2341           gtk_icon_view_item_activated (icon_view, path);
2342           gtk_tree_path_free (path);
2343         }
2344
2345       icon_view->priv->last_single_clicked = NULL;
2346       icon_view->priv->pressed_button = -1;
2347     }
2348
2349   if (dirty)
2350     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
2351
2352   return event->button == GDK_BUTTON_PRIMARY;
2353 }
2354
2355 static gboolean
2356 gtk_icon_view_button_release (GtkWidget      *widget,
2357                               GdkEventButton *event)
2358 {
2359   GtkIconView *icon_view;
2360
2361   icon_view = GTK_ICON_VIEW (widget);
2362
2363   if (icon_view->priv->pressed_button == event->button)
2364     icon_view->priv->pressed_button = -1;
2365
2366   gtk_icon_view_stop_rubberbanding (icon_view);
2367
2368   remove_scroll_timeout (icon_view);
2369
2370   return TRUE;
2371 }
2372
2373 static gboolean
2374 gtk_icon_view_key_press (GtkWidget      *widget,
2375                          GdkEventKey    *event)
2376 {
2377   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
2378
2379   if (icon_view->priv->doing_rubberband)
2380     {
2381       if (event->keyval == GDK_KEY_Escape)
2382         gtk_icon_view_stop_rubberbanding (icon_view);
2383
2384       return TRUE;
2385     }
2386
2387   return GTK_WIDGET_CLASS (gtk_icon_view_parent_class)->key_press_event (widget, event);
2388 }
2389
2390 static gboolean
2391 gtk_icon_view_key_release (GtkWidget      *widget,
2392                            GdkEventKey    *event)
2393 {
2394   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
2395
2396   if (icon_view->priv->doing_rubberband)
2397     return TRUE;
2398
2399   return GTK_WIDGET_CLASS (gtk_icon_view_parent_class)->key_press_event (widget, event);
2400 }
2401
2402 static void
2403 gtk_icon_view_update_rubberband (gpointer data)
2404 {
2405   GtkIconView *icon_view;
2406   gint x, y;
2407   GdkRectangle old_area;
2408   GdkRectangle new_area;
2409   GdkRectangle common;
2410   cairo_region_t *invalid_region;
2411
2412   icon_view = GTK_ICON_VIEW (data);
2413
2414   gdk_window_get_device_position (icon_view->priv->bin_window,
2415                                   icon_view->priv->rubberband_device,
2416                                   &x, &y, NULL);
2417
2418   x = MAX (x, 0);
2419   y = MAX (y, 0);
2420
2421   old_area.x = MIN (icon_view->priv->rubberband_x1,
2422                     icon_view->priv->rubberband_x2);
2423   old_area.y = MIN (icon_view->priv->rubberband_y1,
2424                     icon_view->priv->rubberband_y2);
2425   old_area.width = ABS (icon_view->priv->rubberband_x2 -
2426                         icon_view->priv->rubberband_x1) + 1;
2427   old_area.height = ABS (icon_view->priv->rubberband_y2 -
2428                          icon_view->priv->rubberband_y1) + 1;
2429
2430   new_area.x = MIN (icon_view->priv->rubberband_x1, x);
2431   new_area.y = MIN (icon_view->priv->rubberband_y1, y);
2432   new_area.width = ABS (x - icon_view->priv->rubberband_x1) + 1;
2433   new_area.height = ABS (y - icon_view->priv->rubberband_y1) + 1;
2434
2435   invalid_region = cairo_region_create_rectangle (&old_area);
2436   cairo_region_union_rectangle (invalid_region, &new_area);
2437
2438   gdk_rectangle_intersect (&old_area, &new_area, &common);
2439   if (common.width > 2 && common.height > 2)
2440     {
2441       cairo_region_t *common_region;
2442
2443       /* make sure the border is invalidated */
2444       common.x += 1;
2445       common.y += 1;
2446       common.width -= 2;
2447       common.height -= 2;
2448
2449       common_region = cairo_region_create_rectangle (&common);
2450
2451       cairo_region_subtract (invalid_region, common_region);
2452       cairo_region_destroy (common_region);
2453     }
2454
2455   gdk_window_invalidate_region (icon_view->priv->bin_window, invalid_region, TRUE);
2456
2457   cairo_region_destroy (invalid_region);
2458
2459   icon_view->priv->rubberband_x2 = x;
2460   icon_view->priv->rubberband_y2 = y;
2461
2462   gtk_icon_view_update_rubberband_selection (icon_view);
2463 }
2464
2465 static void
2466 gtk_icon_view_start_rubberbanding (GtkIconView  *icon_view,
2467                                    GdkDevice    *device,
2468                                    gint          x,
2469                                    gint          y)
2470 {
2471   GList *items;
2472
2473   if (icon_view->priv->rubberband_device)
2474     return;
2475
2476   for (items = icon_view->priv->items; items; items = items->next)
2477     {
2478       GtkIconViewItem *item = items->data;
2479
2480       item->selected_before_rubberbanding = item->selected;
2481     }
2482
2483   icon_view->priv->rubberband_x1 = x;
2484   icon_view->priv->rubberband_y1 = y;
2485   icon_view->priv->rubberband_x2 = x;
2486   icon_view->priv->rubberband_y2 = y;
2487
2488   icon_view->priv->doing_rubberband = TRUE;
2489   icon_view->priv->rubberband_device = device;
2490
2491   gtk_device_grab_add (GTK_WIDGET (icon_view), device, TRUE);
2492 }
2493
2494 static void
2495 gtk_icon_view_stop_rubberbanding (GtkIconView *icon_view)
2496 {
2497   if (!icon_view->priv->doing_rubberband)
2498     return;
2499
2500   gtk_device_grab_remove (GTK_WIDGET (icon_view),
2501                           icon_view->priv->rubberband_device);
2502
2503   icon_view->priv->doing_rubberband = FALSE;
2504   icon_view->priv->rubberband_device = NULL;
2505
2506   gtk_widget_queue_draw (GTK_WIDGET (icon_view));
2507 }
2508
2509 static void
2510 gtk_icon_view_update_rubberband_selection (GtkIconView *icon_view)
2511 {
2512   GList *items;
2513   gint x, y, width, height;
2514   gboolean dirty = FALSE;
2515
2516   x = MIN (icon_view->priv->rubberband_x1,
2517            icon_view->priv->rubberband_x2);
2518   y = MIN (icon_view->priv->rubberband_y1,
2519            icon_view->priv->rubberband_y2);
2520   width = ABS (icon_view->priv->rubberband_x1 -
2521                icon_view->priv->rubberband_x2);
2522   height = ABS (icon_view->priv->rubberband_y1 -
2523                 icon_view->priv->rubberband_y2);
2524
2525   for (items = icon_view->priv->items; items; items = items->next)
2526     {
2527       GtkIconViewItem *item = items->data;
2528       gboolean is_in;
2529       gboolean selected;
2530
2531       is_in = gtk_icon_view_item_hit_test (icon_view, item,
2532                                            x, y, width, height);
2533
2534       selected = is_in ^ item->selected_before_rubberbanding;
2535
2536       if (item->selected != selected)
2537         {
2538           item->selected = selected;
2539           dirty = TRUE;
2540           gtk_icon_view_queue_draw_item (icon_view, item);
2541         }
2542     }
2543
2544   if (dirty)
2545     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
2546 }
2547
2548
2549 typedef struct {
2550   GdkRectangle hit_rect;
2551   gboolean     hit;
2552 } HitTestData;
2553
2554 static gboolean
2555 hit_test (GtkCellRenderer    *renderer,
2556           const GdkRectangle *cell_area,
2557           const GdkRectangle *cell_background,
2558           HitTestData        *data)
2559 {
2560   if (MIN (data->hit_rect.x + data->hit_rect.width, cell_area->x + cell_area->width) -
2561       MAX (data->hit_rect.x, cell_area->x) > 0 &&
2562       MIN (data->hit_rect.y + data->hit_rect.height, cell_area->y + cell_area->height) -
2563       MAX (data->hit_rect.y, cell_area->y) > 0)
2564     data->hit = TRUE;
2565
2566   return (data->hit != FALSE);
2567 }
2568
2569 static gboolean
2570 gtk_icon_view_item_hit_test (GtkIconView      *icon_view,
2571                              GtkIconViewItem  *item,
2572                              gint              x,
2573                              gint              y,
2574                              gint              width,
2575                              gint              height)
2576 {
2577   HitTestData data = { { x, y, width, height }, FALSE };
2578   GtkCellAreaContext *context;
2579   GdkRectangle *item_area = &item->cell_area;
2580
2581   if (MIN (x + width, item_area->x + item_area->width) - MAX (x, item_area->x) <= 0 ||
2582       MIN (y + height, item_area->y + item_area->height) - MAX (y, item_area->y) <= 0)
2583     return FALSE;
2584
2585   context = g_ptr_array_index (icon_view->priv->row_contexts, item->row);
2586
2587   _gtk_icon_view_set_cell_data (icon_view, item);
2588   gtk_cell_area_foreach_alloc (icon_view->priv->cell_area, context,
2589                                GTK_WIDGET (icon_view),
2590                                item_area, item_area,
2591                                (GtkCellAllocCallback)hit_test, &data);
2592
2593   return data.hit;
2594 }
2595
2596 static gboolean
2597 gtk_icon_view_unselect_all_internal (GtkIconView  *icon_view)
2598 {
2599   gboolean dirty = FALSE;
2600   GList *items;
2601
2602   if (icon_view->priv->selection_mode == GTK_SELECTION_NONE)
2603     return FALSE;
2604
2605   for (items = icon_view->priv->items; items; items = items->next)
2606     {
2607       GtkIconViewItem *item = items->data;
2608
2609       if (item->selected)
2610         {
2611           item->selected = FALSE;
2612           dirty = TRUE;
2613           gtk_icon_view_queue_draw_item (icon_view, item);
2614           gtk_icon_view_item_selected_changed (icon_view, item);
2615         }
2616     }
2617
2618   return dirty;
2619 }
2620
2621
2622 /* GtkIconView signals */
2623 static void
2624 gtk_icon_view_real_select_all (GtkIconView *icon_view)
2625 {
2626   gtk_icon_view_select_all (icon_view);
2627 }
2628
2629 static void
2630 gtk_icon_view_real_unselect_all (GtkIconView *icon_view)
2631 {
2632   gtk_icon_view_unselect_all (icon_view);
2633 }
2634
2635 static void
2636 gtk_icon_view_real_select_cursor_item (GtkIconView *icon_view)
2637 {
2638   gtk_icon_view_unselect_all (icon_view);
2639
2640   if (icon_view->priv->cursor_item != NULL)
2641     _gtk_icon_view_select_item (icon_view, icon_view->priv->cursor_item);
2642 }
2643
2644 static gboolean
2645 gtk_icon_view_real_activate_cursor_item (GtkIconView *icon_view)
2646 {
2647   GtkTreePath *path;
2648   GtkCellAreaContext *context;
2649
2650   if (!icon_view->priv->cursor_item)
2651     return FALSE;
2652
2653   context = g_ptr_array_index (icon_view->priv->row_contexts, icon_view->priv->cursor_item->row);
2654
2655   _gtk_icon_view_set_cell_data (icon_view, icon_view->priv->cursor_item);
2656   gtk_cell_area_activate (icon_view->priv->cell_area, context,
2657                           GTK_WIDGET (icon_view),
2658                           &icon_view->priv->cursor_item->cell_area,
2659                           0 /* XXX flags */,
2660                           FALSE);
2661
2662   path = gtk_tree_path_new_from_indices (icon_view->priv->cursor_item->index, -1);
2663   gtk_icon_view_item_activated (icon_view, path);
2664   gtk_tree_path_free (path);
2665
2666   return TRUE;
2667 }
2668
2669 static void
2670 gtk_icon_view_real_toggle_cursor_item (GtkIconView *icon_view)
2671 {
2672   if (!icon_view->priv->cursor_item)
2673     return;
2674
2675   switch (icon_view->priv->selection_mode)
2676     {
2677     case GTK_SELECTION_NONE:
2678       break;
2679     case GTK_SELECTION_BROWSE:
2680       _gtk_icon_view_select_item (icon_view, icon_view->priv->cursor_item);
2681       break;
2682     case GTK_SELECTION_SINGLE:
2683       if (icon_view->priv->cursor_item->selected)
2684         _gtk_icon_view_unselect_item (icon_view, icon_view->priv->cursor_item);
2685       else
2686         _gtk_icon_view_select_item (icon_view, icon_view->priv->cursor_item);
2687       break;
2688     case GTK_SELECTION_MULTIPLE:
2689       icon_view->priv->cursor_item->selected = !icon_view->priv->cursor_item->selected;
2690       g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
2691
2692       gtk_icon_view_item_selected_changed (icon_view, icon_view->priv->cursor_item);
2693       gtk_icon_view_queue_draw_item (icon_view, icon_view->priv->cursor_item);
2694       break;
2695     }
2696 }
2697
2698 static void
2699 gtk_icon_view_set_hadjustment_values (GtkIconView *icon_view)
2700 {
2701   GtkAllocation  allocation;
2702   GtkAdjustment *adj = icon_view->priv->hadjustment;
2703   gdouble old_page_size;
2704   gdouble old_upper;
2705   gdouble old_value;
2706   gdouble new_value;
2707   gdouble new_upper;
2708
2709   gtk_widget_get_allocation (GTK_WIDGET (icon_view), &allocation);
2710
2711   old_value = gtk_adjustment_get_value (adj);
2712   old_upper = gtk_adjustment_get_upper (adj);
2713   old_page_size = gtk_adjustment_get_page_size (adj);
2714   new_upper = MAX (allocation.width, icon_view->priv->width);
2715
2716   if (gtk_widget_get_direction (GTK_WIDGET (icon_view)) == GTK_TEXT_DIR_RTL)
2717     {
2718       /* Make sure no scrolling occurs for RTL locales also (if possible) */
2719       /* Quick explanation:
2720        *   In LTR locales, leftmost portion of visible rectangle should stay
2721        *   fixed, which means left edge of scrollbar thumb should remain fixed
2722        *   and thus adjustment's value should stay the same.
2723        *
2724        *   In RTL locales, we want to keep rightmost portion of visible
2725        *   rectangle fixed. This means right edge of thumb should remain fixed.
2726        *   In this case, upper - value - page_size should remain constant.
2727        */
2728       new_value = (new_upper - allocation.width) -
2729                   (old_upper - old_value - old_page_size);
2730       new_value = CLAMP (new_value, 0, new_upper - allocation.width);
2731     }
2732   else
2733     new_value = CLAMP (old_value, 0, new_upper - allocation.width);
2734
2735   gtk_adjustment_configure (adj,
2736                             new_value,
2737                             0.0,
2738                             new_upper,
2739                             allocation.width * 0.1,
2740                             allocation.width * 0.9,
2741                             allocation.width);
2742 }
2743
2744 static void
2745 gtk_icon_view_set_vadjustment_values (GtkIconView *icon_view)
2746 {
2747   GtkAllocation  allocation;
2748   GtkAdjustment *adj = icon_view->priv->vadjustment;
2749
2750   gtk_widget_get_allocation (GTK_WIDGET (icon_view), &allocation);
2751
2752   gtk_adjustment_configure (adj,
2753                             gtk_adjustment_get_value (adj),
2754                             0.0,
2755                             MAX (allocation.height, icon_view->priv->height),
2756                             allocation.height * 0.1,
2757                             allocation.height * 0.9,
2758                             allocation.height);
2759 }
2760
2761 static void
2762 gtk_icon_view_set_hadjustment (GtkIconView   *icon_view,
2763                                GtkAdjustment *adjustment)
2764 {
2765   GtkIconViewPrivate *priv = icon_view->priv;
2766
2767   if (adjustment && priv->hadjustment == adjustment)
2768     return;
2769
2770   if (priv->hadjustment != NULL)
2771     {
2772       g_signal_handlers_disconnect_matched (priv->hadjustment,
2773                                             G_SIGNAL_MATCH_DATA,
2774                                             0, 0, NULL, NULL, icon_view);
2775       g_object_unref (priv->hadjustment);
2776     }
2777
2778   if (!adjustment)
2779     adjustment = gtk_adjustment_new (0.0, 0.0, 0.0,
2780                                      0.0, 0.0, 0.0);
2781
2782   g_signal_connect (adjustment, "value-changed",
2783                     G_CALLBACK (gtk_icon_view_adjustment_changed), icon_view);
2784   priv->hadjustment = g_object_ref_sink (adjustment);
2785   gtk_icon_view_set_hadjustment_values (icon_view);
2786
2787   g_object_notify (G_OBJECT (icon_view), "hadjustment");
2788 }
2789
2790 static void
2791 gtk_icon_view_set_vadjustment (GtkIconView   *icon_view,
2792                                GtkAdjustment *adjustment)
2793 {
2794   GtkIconViewPrivate *priv = icon_view->priv;
2795
2796   if (adjustment && priv->vadjustment == adjustment)
2797     return;
2798
2799   if (priv->vadjustment != NULL)
2800     {
2801       g_signal_handlers_disconnect_matched (priv->vadjustment,
2802                                             G_SIGNAL_MATCH_DATA,
2803                                             0, 0, NULL, NULL, icon_view);
2804       g_object_unref (priv->vadjustment);
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->vadjustment = g_object_ref_sink (adjustment);
2814   gtk_icon_view_set_vadjustment_values (icon_view);
2815
2816   g_object_notify (G_OBJECT (icon_view), "vadjustment");
2817 }
2818
2819 static void
2820 gtk_icon_view_adjustment_changed (GtkAdjustment *adjustment,
2821                                   GtkIconView   *icon_view)
2822 {
2823   GtkIconViewPrivate *priv = icon_view->priv;
2824
2825   if (gtk_widget_get_realized (GTK_WIDGET (icon_view)))
2826     {
2827       gdk_window_move (priv->bin_window,
2828                        - gtk_adjustment_get_value (priv->hadjustment),
2829                        - gtk_adjustment_get_value (priv->vadjustment));
2830
2831       if (icon_view->priv->doing_rubberband)
2832         gtk_icon_view_update_rubberband (GTK_WIDGET (icon_view));
2833
2834       _gtk_icon_view_accessible_adjustment_changed (icon_view);
2835     }
2836 }
2837
2838 static gint
2839 compare_sizes (gconstpointer p1,
2840                gconstpointer p2,
2841                gpointer      unused)
2842 {
2843   return GPOINTER_TO_INT (((const GtkRequestedSize *) p1)->data)
2844        - GPOINTER_TO_INT (((const GtkRequestedSize *) p2)->data);
2845 }
2846
2847 static void
2848 gtk_icon_view_layout (GtkIconView *icon_view)
2849 {
2850   GtkIconViewPrivate *priv = icon_view->priv;
2851   GtkWidget *widget = GTK_WIDGET (icon_view);
2852   GList *items;
2853   gint item_width; /* this doesn't include item_padding */
2854   gint n_columns, n_rows, n_items;
2855   gint col, row;
2856   GtkRequestedSize *sizes;
2857
2858   n_items = gtk_icon_view_get_n_items (icon_view);
2859
2860   gtk_icon_view_compute_n_items_for_size (icon_view,
2861                                           GTK_ORIENTATION_HORIZONTAL,
2862                                           gtk_widget_get_allocated_width (widget),
2863                                           NULL, NULL,
2864                                           &n_columns, &item_width);
2865   n_rows = (n_items + n_columns - 1) / n_columns;
2866
2867   if (n_columns <= 1)
2868     {
2869       /* We might need vertical scrolling here */
2870       int min_width = item_width + 2 * priv->item_padding + 2 * priv->margin;
2871       priv->width = MAX (min_width, gtk_widget_get_allocated_width (widget));
2872     }
2873   else
2874     {
2875       priv->width = gtk_widget_get_allocated_width (widget);
2876     }
2877
2878   /* Clear the per row contexts */
2879   g_ptr_array_set_size (icon_view->priv->row_contexts, 0);
2880
2881   gtk_cell_area_context_reset (priv->cell_area_context);
2882   /* because layouting is complicated. We designed an API
2883    * that is O(N²) and nonsensical.
2884    * And we're proud of it. */
2885   for (items = priv->items; items; items = items->next)
2886     {
2887       _gtk_icon_view_set_cell_data (icon_view, items->data);
2888       gtk_cell_area_get_preferred_width (priv->cell_area,
2889                                          priv->cell_area_context,
2890                                          widget,
2891                                          NULL, NULL);
2892     }
2893
2894   sizes = g_newa (GtkRequestedSize, n_rows);
2895   items = priv->items;
2896   priv->height = priv->margin;
2897
2898   /* Collect the heights for all rows */
2899   for (row = 0; row < n_rows; row++)
2900     {
2901       GtkCellAreaContext *context = gtk_cell_area_copy_context (priv->cell_area, priv->cell_area_context);
2902       g_ptr_array_add (priv->row_contexts, context);
2903
2904       for (col = 0; col < n_columns && items; col++, items = items->next)
2905         {
2906           GtkIconViewItem *item = items->data;
2907
2908           _gtk_icon_view_set_cell_data (icon_view, item);
2909           gtk_cell_area_get_preferred_height_for_width (priv->cell_area,
2910                                                         context,
2911                                                         widget,
2912                                                         item_width,
2913                                                         NULL, NULL);
2914         }
2915
2916       sizes[row].data = GINT_TO_POINTER (row);
2917       gtk_cell_area_context_get_preferred_height_for_width (context,
2918                                                             item_width,
2919                                                             &sizes[row].minimum_size,
2920                                                             &sizes[row].natural_size);
2921       priv->height += sizes[row].minimum_size + 2 * priv->item_padding + priv->row_spacing;
2922     }
2923
2924   priv->height -= priv->row_spacing;
2925   priv->height += priv->margin;
2926   priv->height = MIN (priv->height, gtk_widget_get_allocated_height (widget));
2927
2928   gtk_distribute_natural_allocation (gtk_widget_get_allocated_height (widget) - priv->height,
2929                                      n_rows,
2930                                      sizes);
2931
2932   /* Actually allocate the rows */
2933   g_qsort_with_data (sizes, n_rows, sizeof (GtkRequestedSize), compare_sizes, NULL);
2934
2935   items = priv->items;
2936   priv->height = priv->margin;
2937
2938   for (row = 0; row < n_rows; row++)
2939     {
2940       GtkCellAreaContext *context = g_ptr_array_index (priv->row_contexts, row);
2941       gtk_cell_area_context_allocate (context, item_width, sizes[row].minimum_size);
2942
2943       priv->height += priv->item_padding;
2944
2945       for (col = 0; col < n_columns && items; col++, items = items->next)
2946         {
2947           GtkIconViewItem *item = items->data;
2948
2949           item->cell_area.x = priv->margin + (col * 2 + 1) * priv->item_padding + col * (priv->column_spacing + item_width);
2950           item->cell_area.width = item_width;
2951           item->cell_area.y = priv->height;
2952           item->cell_area.height = sizes[row].minimum_size;
2953           item->row = row;
2954           item->col = col;
2955         }
2956
2957       priv->height += sizes[row].minimum_size + priv->item_padding + priv->row_spacing;
2958     }
2959
2960   priv->height -= priv->row_spacing;
2961   priv->height += priv->margin;
2962   priv->height = MAX (priv->height, gtk_widget_get_allocated_height (widget));
2963 }
2964
2965 static void
2966 gtk_icon_view_invalidate_sizes (GtkIconView *icon_view)
2967 {
2968   /* Clear all item sizes */
2969   g_list_foreach (icon_view->priv->items,
2970                   (GFunc)gtk_icon_view_item_invalidate_size, NULL);
2971
2972   /* Re-layout the items */
2973   gtk_widget_queue_resize (GTK_WIDGET (icon_view));
2974 }
2975
2976 static void
2977 gtk_icon_view_item_invalidate_size (GtkIconViewItem *item)
2978 {
2979   item->cell_area.width = -1;
2980   item->cell_area.height = -1;
2981 }
2982
2983 static void
2984 gtk_icon_view_paint_item (GtkIconView     *icon_view,
2985                           cairo_t         *cr,
2986                           GtkIconViewItem *item,
2987                           gint             x,
2988                           gint             y,
2989                           gboolean         draw_focus)
2990 {
2991   GdkRectangle cell_area;
2992   GtkStateFlags state = 0;
2993   GtkCellRendererState flags = 0;
2994   GtkStyleContext *style_context;
2995   GtkWidget *widget = GTK_WIDGET (icon_view);
2996   GtkIconViewPrivate *priv = icon_view->priv;
2997   GtkCellAreaContext *context;
2998
2999   if (priv->model == NULL)
3000     return;
3001
3002   _gtk_icon_view_set_cell_data (icon_view, item);
3003
3004   style_context = gtk_widget_get_style_context (widget);
3005   state = gtk_widget_get_state_flags (widget);
3006
3007   gtk_style_context_save (style_context);
3008   gtk_style_context_add_class (style_context, GTK_STYLE_CLASS_VIEW);
3009   gtk_style_context_add_class (style_context, GTK_STYLE_CLASS_CELL);
3010
3011   state &= ~(GTK_STATE_FLAG_SELECTED | GTK_STATE_FLAG_PRELIGHT);
3012
3013   if (item->selected)
3014     {
3015       if ((state & GTK_STATE_FLAG_FOCUSED) &&
3016           item == icon_view->priv->cursor_item)
3017         {
3018           flags |= GTK_CELL_RENDERER_FOCUSED;
3019         }
3020
3021       state |= GTK_STATE_FLAG_SELECTED;
3022       flags |= GTK_CELL_RENDERER_SELECTED;
3023     }
3024
3025   if (item->prelight)
3026     {
3027       state |= GTK_STATE_FLAG_PRELIGHT;
3028       flags |= GTK_CELL_RENDERER_PRELIT;
3029     }
3030
3031   gtk_style_context_set_state (style_context, state);
3032
3033   if (item->selected)
3034     {
3035       gtk_render_background (style_context, cr,
3036                              x - icon_view->priv->item_padding,
3037                              y - icon_view->priv->item_padding,
3038                              item->cell_area.width  + icon_view->priv->item_padding * 2,
3039                              item->cell_area.height + icon_view->priv->item_padding * 2);
3040       gtk_render_frame (style_context, cr,
3041                         x - icon_view->priv->item_padding,
3042                         y - icon_view->priv->item_padding,
3043                         item->cell_area.width  + icon_view->priv->item_padding * 2,
3044                         item->cell_area.height + icon_view->priv->item_padding * 2);
3045     }
3046
3047   cell_area.x      = x;
3048   cell_area.y      = y;
3049   cell_area.width  = item->cell_area.width;
3050   cell_area.height = item->cell_area.height;
3051
3052   context = g_ptr_array_index (priv->row_contexts, item->row);
3053   gtk_cell_area_render (priv->cell_area, context,
3054                         widget, cr, &cell_area, &cell_area, flags,
3055                         draw_focus);
3056
3057   gtk_style_context_restore (style_context);
3058 }
3059
3060 static void
3061 gtk_icon_view_paint_rubberband (GtkIconView     *icon_view,
3062                                 cairo_t         *cr)
3063 {
3064   GtkStyleContext *context;
3065   GdkRectangle rect;
3066
3067   cairo_save (cr);
3068
3069   rect.x = MIN (icon_view->priv->rubberband_x1, icon_view->priv->rubberband_x2);
3070   rect.y = MIN (icon_view->priv->rubberband_y1, icon_view->priv->rubberband_y2);
3071   rect.width = ABS (icon_view->priv->rubberband_x1 - icon_view->priv->rubberband_x2) + 1;
3072   rect.height = ABS (icon_view->priv->rubberband_y1 - icon_view->priv->rubberband_y2) + 1;
3073
3074   context = gtk_widget_get_style_context (GTK_WIDGET (icon_view));
3075
3076   gtk_style_context_save (context);
3077   gtk_style_context_add_class (context, GTK_STYLE_CLASS_RUBBERBAND);
3078
3079   gdk_cairo_rectangle (cr, &rect);
3080   cairo_clip (cr);
3081
3082   gtk_render_background (context, cr,
3083                          rect.x, rect.y,
3084                          rect.width, rect.height);
3085   gtk_render_frame (context, cr,
3086                     rect.x, rect.y,
3087                     rect.width, rect.height);
3088
3089   gtk_style_context_restore (context);
3090   cairo_restore (cr);
3091 }
3092
3093 static void
3094 gtk_icon_view_queue_draw_path (GtkIconView *icon_view,
3095                                GtkTreePath *path)
3096 {
3097   GList *l;
3098   gint index;
3099
3100   index = gtk_tree_path_get_indices (path)[0];
3101
3102   for (l = icon_view->priv->items; l; l = l->next)
3103     {
3104       GtkIconViewItem *item = l->data;
3105
3106       if (item->index == index)
3107         {
3108           gtk_icon_view_queue_draw_item (icon_view, item);
3109           break;
3110         }
3111     }
3112 }
3113
3114 static void
3115 gtk_icon_view_queue_draw_item (GtkIconView     *icon_view,
3116                                GtkIconViewItem *item)
3117 {
3118   GdkRectangle  rect;
3119   GdkRectangle *item_area = &item->cell_area;
3120
3121   rect.x      = item_area->x - icon_view->priv->item_padding;
3122   rect.y      = item_area->y - icon_view->priv->item_padding;
3123   rect.width  = item_area->width  + icon_view->priv->item_padding * 2;
3124   rect.height = item_area->height + icon_view->priv->item_padding * 2;
3125
3126   if (icon_view->priv->bin_window)
3127     gdk_window_invalidate_rect (icon_view->priv->bin_window, &rect, TRUE);
3128 }
3129
3130 void
3131 _gtk_icon_view_set_cursor_item (GtkIconView     *icon_view,
3132                                 GtkIconViewItem *item,
3133                                 GtkCellRenderer *cursor_cell)
3134 {
3135   AtkObject *obj;
3136   AtkObject *item_obj;
3137   AtkObject *cursor_item_obj;
3138
3139   /* When hitting this path from keynav, the focus cell is
3140    * already set, we dont need to notify the atk object
3141    * but we still need to queue the draw here (in the case
3142    * that the focus cell changes but not the cursor item).
3143    */
3144   gtk_icon_view_queue_draw_item (icon_view, item);
3145
3146   if (icon_view->priv->cursor_item == item &&
3147       (cursor_cell == NULL || cursor_cell == gtk_cell_area_get_focus_cell (icon_view->priv->cell_area)))
3148     return;
3149
3150   obj = gtk_widget_get_accessible (GTK_WIDGET (icon_view));
3151   if (icon_view->priv->cursor_item != NULL)
3152     {
3153       gtk_icon_view_queue_draw_item (icon_view, icon_view->priv->cursor_item);
3154       if (obj != NULL)
3155         {
3156           cursor_item_obj = atk_object_ref_accessible_child (obj, icon_view->priv->cursor_item->index);
3157           if (cursor_item_obj != NULL)
3158             atk_object_notify_state_change (cursor_item_obj, ATK_STATE_FOCUSED, FALSE);
3159         }
3160     }
3161   icon_view->priv->cursor_item = item;
3162
3163   if (cursor_cell)
3164     gtk_cell_area_set_focus_cell (icon_view->priv->cell_area, cursor_cell);
3165   else
3166     {
3167       /* Make sure there is a cell in focus initially */
3168       if (!gtk_cell_area_get_focus_cell (icon_view->priv->cell_area))
3169         gtk_cell_area_focus (icon_view->priv->cell_area, GTK_DIR_TAB_FORWARD);
3170     }
3171
3172   /* Notify that accessible focus object has changed */
3173   item_obj = atk_object_ref_accessible_child (obj, item->index);
3174
3175   if (item_obj != NULL)
3176     {
3177       atk_focus_tracker_notify (item_obj);
3178       atk_object_notify_state_change (item_obj, ATK_STATE_FOCUSED, TRUE);
3179       g_object_unref (item_obj);
3180     }
3181 }
3182
3183
3184 static GtkIconViewItem *
3185 gtk_icon_view_item_new (void)
3186 {
3187   GtkIconViewItem *item;
3188
3189   item = g_slice_new0 (GtkIconViewItem);
3190
3191   item->cell_area.width  = -1;
3192   item->cell_area.height = -1;
3193
3194   return item;
3195 }
3196
3197 static void
3198 gtk_icon_view_item_free (GtkIconViewItem *item)
3199 {
3200   g_return_if_fail (item != NULL);
3201
3202   g_slice_free (GtkIconViewItem, item);
3203 }
3204
3205 GtkIconViewItem *
3206 _gtk_icon_view_get_item_at_coords (GtkIconView          *icon_view,
3207                                    gint                  x,
3208                                    gint                  y,
3209                                    gboolean              only_in_cell,
3210                                    GtkCellRenderer     **cell_at_pos)
3211 {
3212   GList *items;
3213
3214   if (cell_at_pos)
3215     *cell_at_pos = NULL;
3216
3217   for (items = icon_view->priv->items; items; items = items->next)
3218     {
3219       GtkIconViewItem *item = items->data;
3220       GdkRectangle    *item_area = &item->cell_area;
3221
3222       if (x >= item_area->x - icon_view->priv->column_spacing/2 &&
3223           x <= item_area->x + item_area->width + icon_view->priv->column_spacing/2 &&
3224           y >= item_area->y - icon_view->priv->row_spacing/2 &&
3225           y <= item_area->y + item_area->height + icon_view->priv->row_spacing/2)
3226         {
3227           if (only_in_cell || cell_at_pos)
3228             {
3229               GtkCellRenderer *cell = NULL;
3230               GtkCellAreaContext *context;
3231
3232               context = g_ptr_array_index (icon_view->priv->row_contexts, item->row);
3233               _gtk_icon_view_set_cell_data (icon_view, item);
3234
3235               if (x >= item_area->x && x <= item_area->x + item_area->width &&
3236                   y >= item_area->y && y <= item_area->y + item_area->height)
3237                 cell = gtk_cell_area_get_cell_at_position (icon_view->priv->cell_area, context,
3238                                                            GTK_WIDGET (icon_view),
3239                                                            item_area,
3240                                                            x, y, NULL);
3241
3242               if (cell_at_pos)
3243                 *cell_at_pos = cell;
3244
3245               if (only_in_cell)
3246                 return cell != NULL ? item : NULL;
3247               else
3248                 return item;
3249             }
3250           return item;
3251         }
3252     }
3253   return NULL;
3254 }
3255
3256 void
3257 _gtk_icon_view_select_item (GtkIconView      *icon_view,
3258                             GtkIconViewItem  *item)
3259 {
3260   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
3261   g_return_if_fail (item != NULL);
3262
3263   if (item->selected)
3264     return;
3265
3266   if (icon_view->priv->selection_mode == GTK_SELECTION_NONE)
3267     return;
3268   else if (icon_view->priv->selection_mode != GTK_SELECTION_MULTIPLE)
3269     gtk_icon_view_unselect_all_internal (icon_view);
3270
3271   item->selected = TRUE;
3272
3273   gtk_icon_view_item_selected_changed (icon_view, item);
3274   g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
3275
3276   gtk_icon_view_queue_draw_item (icon_view, item);
3277 }
3278
3279
3280 void
3281 _gtk_icon_view_unselect_item (GtkIconView      *icon_view,
3282                               GtkIconViewItem  *item)
3283 {
3284   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
3285   g_return_if_fail (item != NULL);
3286
3287   if (!item->selected)
3288     return;
3289
3290   if (icon_view->priv->selection_mode == GTK_SELECTION_NONE ||
3291       icon_view->priv->selection_mode == GTK_SELECTION_BROWSE)
3292     return;
3293
3294   item->selected = FALSE;
3295
3296   gtk_icon_view_item_selected_changed (icon_view, item);
3297   g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
3298
3299   gtk_icon_view_queue_draw_item (icon_view, item);
3300 }
3301
3302 static void
3303 verify_items (GtkIconView *icon_view)
3304 {
3305   GList *items;
3306   int i = 0;
3307
3308   for (items = icon_view->priv->items; items; items = items->next)
3309     {
3310       GtkIconViewItem *item = items->data;
3311
3312       if (item->index != i)
3313         g_error ("List item does not match its index: "
3314                  "item index %d and list index %d\n", item->index, i);
3315
3316       i++;
3317     }
3318 }
3319
3320 static void
3321 gtk_icon_view_row_changed (GtkTreeModel *model,
3322                            GtkTreePath  *path,
3323                            GtkTreeIter  *iter,
3324                            gpointer      data)
3325 {
3326   GtkIconView *icon_view = GTK_ICON_VIEW (data);
3327
3328   /* ignore changes in branches */
3329   if (gtk_tree_path_get_depth (path) > 1)
3330     return;
3331
3332   /* An icon view subclass might add it's own model and populate
3333    * things at init() time instead of waiting for the constructor()
3334    * to be called
3335    */
3336   if (icon_view->priv->cell_area)
3337     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
3338
3339   /* Here we can use a "grow-only" strategy for optimization
3340    * and only invalidate a single item and queue a relayout
3341    * instead of invalidating the whole thing.
3342    *
3343    * For now GtkIconView still cant deal with huge models
3344    * so just invalidate the whole thing when the model
3345    * changes.
3346    */
3347   gtk_icon_view_invalidate_sizes (icon_view);
3348
3349   verify_items (icon_view);
3350 }
3351
3352 static void
3353 gtk_icon_view_row_inserted (GtkTreeModel *model,
3354                             GtkTreePath  *path,
3355                             GtkTreeIter  *iter,
3356                             gpointer      data)
3357 {
3358   GtkIconView *icon_view = GTK_ICON_VIEW (data);
3359   gint index;
3360   GtkIconViewItem *item;
3361   GList *list;
3362
3363   /* ignore changes in branches */
3364   if (gtk_tree_path_get_depth (path) > 1)
3365     return;
3366
3367   index = gtk_tree_path_get_indices(path)[0];
3368
3369   item = gtk_icon_view_item_new ();
3370
3371   item->index = index;
3372
3373   /* FIXME: We can be more efficient here,
3374      we can store a tail pointer and use that when
3375      appending (which is a rather common operation)
3376   */
3377   icon_view->priv->items = g_list_insert (icon_view->priv->items,
3378                                          item, index);
3379
3380   list = g_list_nth (icon_view->priv->items, index + 1);
3381   for (; list; list = list->next)
3382     {
3383       item = list->data;
3384
3385       item->index++;
3386     }
3387
3388   verify_items (icon_view);
3389
3390   gtk_widget_queue_resize (GTK_WIDGET (icon_view));
3391 }
3392
3393 static void
3394 gtk_icon_view_row_deleted (GtkTreeModel *model,
3395                            GtkTreePath  *path,
3396                            gpointer      data)
3397 {
3398   GtkIconView *icon_view = GTK_ICON_VIEW (data);
3399   gint index;
3400   GtkIconViewItem *item;
3401   GList *list, *next;
3402   gboolean emit = FALSE;
3403
3404   /* ignore changes in branches */
3405   if (gtk_tree_path_get_depth (path) > 1)
3406     return;
3407
3408   index = gtk_tree_path_get_indices(path)[0];
3409
3410   list = g_list_nth (icon_view->priv->items, index);
3411   item = list->data;
3412
3413   if (icon_view->priv->cell_area)
3414     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
3415
3416   if (item == icon_view->priv->anchor_item)
3417     icon_view->priv->anchor_item = NULL;
3418
3419   if (item == icon_view->priv->cursor_item)
3420     icon_view->priv->cursor_item = NULL;
3421
3422   if (item == icon_view->priv->last_prelight)
3423     icon_view->priv->last_prelight = NULL;
3424
3425   if (item->selected)
3426     emit = TRUE;
3427
3428   gtk_icon_view_item_free (item);
3429
3430   for (next = list->next; next; next = next->next)
3431     {
3432       item = next->data;
3433
3434       item->index--;
3435     }
3436
3437   icon_view->priv->items = g_list_delete_link (icon_view->priv->items, list);
3438
3439   verify_items (icon_view);
3440
3441   gtk_widget_queue_resize (GTK_WIDGET (icon_view));
3442
3443   if (emit)
3444     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
3445 }
3446
3447 static void
3448 gtk_icon_view_rows_reordered (GtkTreeModel *model,
3449                               GtkTreePath  *parent,
3450                               GtkTreeIter  *iter,
3451                               gint         *new_order,
3452                               gpointer      data)
3453 {
3454   GtkIconView *icon_view = GTK_ICON_VIEW (data);
3455   int i;
3456   int length;
3457   GList *items = NULL, *list;
3458   GtkIconViewItem **item_array;
3459   gint *order;
3460
3461   /* ignore changes in branches */
3462   if (iter != NULL)
3463     return;
3464
3465   if (icon_view->priv->cell_area)
3466     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
3467
3468   length = gtk_tree_model_iter_n_children (model, NULL);
3469
3470   order = g_new (gint, length);
3471   for (i = 0; i < length; i++)
3472     order [new_order[i]] = i;
3473
3474   item_array = g_new (GtkIconViewItem *, length);
3475   for (i = 0, list = icon_view->priv->items; list != NULL; list = list->next, i++)
3476     item_array[order[i]] = list->data;
3477   g_free (order);
3478
3479   for (i = length - 1; i >= 0; i--)
3480     {
3481       item_array[i]->index = i;
3482       items = g_list_prepend (items, item_array[i]);
3483     }
3484
3485   g_free (item_array);
3486   g_list_free (icon_view->priv->items);
3487   icon_view->priv->items = items;
3488
3489   gtk_widget_queue_resize (GTK_WIDGET (icon_view));
3490
3491   verify_items (icon_view);
3492 }
3493
3494 static void
3495 gtk_icon_view_build_items (GtkIconView *icon_view)
3496 {
3497   GtkTreeIter iter;
3498   int i;
3499   GList *items = NULL;
3500
3501   if (!gtk_tree_model_get_iter_first (icon_view->priv->model,
3502                                       &iter))
3503     return;
3504
3505   i = 0;
3506
3507   do
3508     {
3509       GtkIconViewItem *item = gtk_icon_view_item_new ();
3510
3511       item->index = i;
3512
3513       i++;
3514
3515       items = g_list_prepend (items, item);
3516
3517     } while (gtk_tree_model_iter_next (icon_view->priv->model, &iter));
3518
3519   icon_view->priv->items = g_list_reverse (items);
3520 }
3521
3522 static void
3523 gtk_icon_view_add_move_binding (GtkBindingSet  *binding_set,
3524                                 guint           keyval,
3525                                 guint           modmask,
3526                                 GtkMovementStep step,
3527                                 gint            count)
3528 {
3529
3530   gtk_binding_entry_add_signal (binding_set, keyval, modmask,
3531                                 I_("move-cursor"), 2,
3532                                 G_TYPE_ENUM, step,
3533                                 G_TYPE_INT, count);
3534
3535   gtk_binding_entry_add_signal (binding_set, keyval, GDK_SHIFT_MASK,
3536                                 "move-cursor", 2,
3537                                 G_TYPE_ENUM, step,
3538                                 G_TYPE_INT, count);
3539
3540   if ((modmask & GDK_CONTROL_MASK) == GDK_CONTROL_MASK)
3541    return;
3542
3543   gtk_binding_entry_add_signal (binding_set, keyval, GDK_CONTROL_MASK | GDK_SHIFT_MASK,
3544                                 "move-cursor", 2,
3545                                 G_TYPE_ENUM, step,
3546                                 G_TYPE_INT, count);
3547
3548   gtk_binding_entry_add_signal (binding_set, keyval, GDK_CONTROL_MASK,
3549                                 "move-cursor", 2,
3550                                 G_TYPE_ENUM, step,
3551                                 G_TYPE_INT, count);
3552 }
3553
3554 static gboolean
3555 gtk_icon_view_real_move_cursor (GtkIconView     *icon_view,
3556                                 GtkMovementStep  step,
3557                                 gint             count)
3558 {
3559   GdkModifierType state;
3560
3561   g_return_val_if_fail (GTK_ICON_VIEW (icon_view), FALSE);
3562   g_return_val_if_fail (step == GTK_MOVEMENT_LOGICAL_POSITIONS ||
3563                         step == GTK_MOVEMENT_VISUAL_POSITIONS ||
3564                         step == GTK_MOVEMENT_DISPLAY_LINES ||
3565                         step == GTK_MOVEMENT_PAGES ||
3566                         step == GTK_MOVEMENT_BUFFER_ENDS, FALSE);
3567
3568   if (!gtk_widget_has_focus (GTK_WIDGET (icon_view)))
3569     return FALSE;
3570
3571   gtk_cell_area_stop_editing (icon_view->priv->cell_area, FALSE);
3572   gtk_widget_grab_focus (GTK_WIDGET (icon_view));
3573
3574   if (gtk_get_current_event_state (&state))
3575     {
3576       GdkModifierType extend_mod_mask;
3577       GdkModifierType modify_mod_mask;
3578
3579       extend_mod_mask =
3580         gtk_widget_get_modifier_mask (GTK_WIDGET (icon_view),
3581                                       GDK_MODIFIER_INTENT_EXTEND_SELECTION);
3582       modify_mod_mask =
3583         gtk_widget_get_modifier_mask (GTK_WIDGET (icon_view),
3584                                       GDK_MODIFIER_INTENT_MODIFY_SELECTION);
3585
3586       if ((state & modify_mod_mask) == modify_mod_mask)
3587         icon_view->priv->modify_selection_pressed = TRUE;
3588       if ((state & extend_mod_mask) == extend_mod_mask)
3589         icon_view->priv->extend_selection_pressed = TRUE;
3590     }
3591   /* else we assume not pressed */
3592
3593   switch (step)
3594     {
3595     case GTK_MOVEMENT_LOGICAL_POSITIONS:
3596     case GTK_MOVEMENT_VISUAL_POSITIONS:
3597       gtk_icon_view_move_cursor_left_right (icon_view, count);
3598       break;
3599     case GTK_MOVEMENT_DISPLAY_LINES:
3600       gtk_icon_view_move_cursor_up_down (icon_view, count);
3601       break;
3602     case GTK_MOVEMENT_PAGES:
3603       gtk_icon_view_move_cursor_page_up_down (icon_view, count);
3604       break;
3605     case GTK_MOVEMENT_BUFFER_ENDS:
3606       gtk_icon_view_move_cursor_start_end (icon_view, count);
3607       break;
3608     default:
3609       g_assert_not_reached ();
3610     }
3611
3612   icon_view->priv->modify_selection_pressed = FALSE;
3613   icon_view->priv->extend_selection_pressed = FALSE;
3614
3615   icon_view->priv->draw_focus = TRUE;
3616
3617   return TRUE;
3618 }
3619
3620 static GtkIconViewItem *
3621 find_item (GtkIconView     *icon_view,
3622            GtkIconViewItem *current,
3623            gint             row_ofs,
3624            gint             col_ofs)
3625 {
3626   gint row, col;
3627   GList *items;
3628   GtkIconViewItem *item;
3629
3630   /* FIXME: this could be more efficient
3631    */
3632   row = current->row + row_ofs;
3633   col = current->col + col_ofs;
3634
3635   for (items = icon_view->priv->items; items; items = items->next)
3636     {
3637       item = items->data;
3638       if (item->row == row && item->col == col)
3639         return item;
3640     }
3641
3642   return NULL;
3643 }
3644
3645 static GtkIconViewItem *
3646 find_item_page_up_down (GtkIconView     *icon_view,
3647                         GtkIconViewItem *current,
3648                         gint             count)
3649 {
3650   GList *item, *next;
3651   gint y, col;
3652
3653   col = current->col;
3654   y = current->cell_area.y + count * gtk_adjustment_get_page_size (icon_view->priv->vadjustment);
3655
3656   item = g_list_find (icon_view->priv->items, current);
3657   if (count > 0)
3658     {
3659       while (item)
3660         {
3661           for (next = item->next; next; next = next->next)
3662             {
3663               if (((GtkIconViewItem *)next->data)->col == col)
3664                 break;
3665             }
3666           if (!next || ((GtkIconViewItem *)next->data)->cell_area.y > y)
3667             break;
3668
3669           item = next;
3670         }
3671     }
3672   else
3673     {
3674       while (item)
3675         {
3676           for (next = item->prev; next; next = next->prev)
3677             {
3678               if (((GtkIconViewItem *)next->data)->col == col)
3679                 break;
3680             }
3681           if (!next || ((GtkIconViewItem *)next->data)->cell_area.y < y)
3682             break;
3683
3684           item = next;
3685         }
3686     }
3687
3688   if (item)
3689     return item->data;
3690
3691   return NULL;
3692 }
3693
3694 static gboolean
3695 gtk_icon_view_select_all_between (GtkIconView     *icon_view,
3696                                   GtkIconViewItem *anchor,
3697                                   GtkIconViewItem *cursor)
3698 {
3699   GList *items;
3700   GtkIconViewItem *item;
3701   gint row1, row2, col1, col2;
3702   gboolean dirty = FALSE;
3703
3704   if (anchor->row < cursor->row)
3705     {
3706       row1 = anchor->row;
3707       row2 = cursor->row;
3708     }
3709   else
3710     {
3711       row1 = cursor->row;
3712       row2 = anchor->row;
3713     }
3714
3715   if (anchor->col < cursor->col)
3716     {
3717       col1 = anchor->col;
3718       col2 = cursor->col;
3719     }
3720   else
3721     {
3722       col1 = cursor->col;
3723       col2 = anchor->col;
3724     }
3725
3726   for (items = icon_view->priv->items; items; items = items->next)
3727     {
3728       item = items->data;
3729
3730       if (row1 <= item->row && item->row <= row2 &&
3731           col1 <= item->col && item->col <= col2)
3732         {
3733           if (!item->selected)
3734             {
3735               dirty = TRUE;
3736               item->selected = TRUE;
3737               gtk_icon_view_item_selected_changed (icon_view, item);
3738             }
3739           gtk_icon_view_queue_draw_item (icon_view, item);
3740         }
3741     }
3742
3743   return dirty;
3744 }
3745
3746 static void
3747 gtk_icon_view_move_cursor_up_down (GtkIconView *icon_view,
3748                                    gint         count)
3749 {
3750   GtkIconViewItem *item;
3751   GtkCellRenderer *cell = NULL;
3752   gboolean dirty = FALSE;
3753   gint step;
3754   GtkDirectionType direction;
3755
3756   if (!gtk_widget_has_focus (GTK_WIDGET (icon_view)))
3757     return;
3758
3759   direction = count < 0 ? GTK_DIR_UP : GTK_DIR_DOWN;
3760
3761   if (!icon_view->priv->cursor_item)
3762     {
3763       GList *list;
3764
3765       if (count > 0)
3766         list = icon_view->priv->items;
3767       else
3768         list = g_list_last (icon_view->priv->items);
3769
3770       if (list)
3771         {
3772           item = list->data;
3773
3774           /* Give focus to the first cell initially */
3775           _gtk_icon_view_set_cell_data (icon_view, item);
3776           gtk_cell_area_focus (icon_view->priv->cell_area, direction);
3777         }
3778       else
3779         {
3780           item = NULL;
3781         }
3782     }
3783   else
3784     {
3785       item = icon_view->priv->cursor_item;
3786       step = count > 0 ? 1 : -1;
3787
3788       /* Save the current focus cell in case we hit the edge */
3789       cell = gtk_cell_area_get_focus_cell (icon_view->priv->cell_area);
3790
3791       while (item)
3792         {
3793           _gtk_icon_view_set_cell_data (icon_view, item);
3794
3795           if (gtk_cell_area_focus (icon_view->priv->cell_area, direction))
3796             break;
3797
3798           item = find_item (icon_view, item, step, 0);
3799         }
3800     }
3801
3802   if (!item)
3803     {
3804       if (!gtk_widget_keynav_failed (GTK_WIDGET (icon_view), direction))
3805         {
3806           GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (icon_view));
3807           if (toplevel)
3808             gtk_widget_child_focus (toplevel,
3809                                     direction == GTK_DIR_UP ?
3810                                     GTK_DIR_TAB_BACKWARD :
3811                                     GTK_DIR_TAB_FORWARD);
3812
3813         }
3814
3815       gtk_cell_area_set_focus_cell (icon_view->priv->cell_area, cell);
3816       return;
3817     }
3818
3819   if (icon_view->priv->modify_selection_pressed ||
3820       !icon_view->priv->extend_selection_pressed ||
3821       !icon_view->priv->anchor_item ||
3822       icon_view->priv->selection_mode != GTK_SELECTION_MULTIPLE)
3823     icon_view->priv->anchor_item = item;
3824
3825   cell = gtk_cell_area_get_focus_cell (icon_view->priv->cell_area);
3826   _gtk_icon_view_set_cursor_item (icon_view, item, cell);
3827
3828   if (!icon_view->priv->modify_selection_pressed &&
3829       icon_view->priv->selection_mode != GTK_SELECTION_NONE)
3830     {
3831       dirty = gtk_icon_view_unselect_all_internal (icon_view);
3832       dirty = gtk_icon_view_select_all_between (icon_view,
3833                                                 icon_view->priv->anchor_item,
3834                                                 item) || dirty;
3835     }
3836
3837   gtk_icon_view_scroll_to_item (icon_view, item);
3838
3839   if (dirty)
3840     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
3841 }
3842
3843 static void
3844 gtk_icon_view_move_cursor_page_up_down (GtkIconView *icon_view,
3845                                         gint         count)
3846 {
3847   GtkIconViewItem *item;
3848   gboolean dirty = FALSE;
3849
3850   if (!gtk_widget_has_focus (GTK_WIDGET (icon_view)))
3851     return;
3852
3853   if (!icon_view->priv->cursor_item)
3854     {
3855       GList *list;
3856
3857       if (count > 0)
3858         list = icon_view->priv->items;
3859       else
3860         list = g_list_last (icon_view->priv->items);
3861
3862       item = list ? list->data : NULL;
3863     }
3864   else
3865     item = find_item_page_up_down (icon_view,
3866                                    icon_view->priv->cursor_item,
3867                                    count);
3868
3869   if (item == icon_view->priv->cursor_item)
3870     gtk_widget_error_bell (GTK_WIDGET (icon_view));
3871
3872   if (!item)
3873     return;
3874
3875   if (icon_view->priv->modify_selection_pressed ||
3876       !icon_view->priv->extend_selection_pressed ||
3877       !icon_view->priv->anchor_item ||
3878       icon_view->priv->selection_mode != GTK_SELECTION_MULTIPLE)
3879     icon_view->priv->anchor_item = item;
3880
3881   _gtk_icon_view_set_cursor_item (icon_view, item, NULL);
3882
3883   if (!icon_view->priv->modify_selection_pressed &&
3884       icon_view->priv->selection_mode != GTK_SELECTION_NONE)
3885     {
3886       dirty = gtk_icon_view_unselect_all_internal (icon_view);
3887       dirty = gtk_icon_view_select_all_between (icon_view,
3888                                                 icon_view->priv->anchor_item,
3889                                                 item) || dirty;
3890     }
3891
3892   gtk_icon_view_scroll_to_item (icon_view, item);
3893
3894   if (dirty)
3895     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
3896 }
3897
3898 static void
3899 gtk_icon_view_move_cursor_left_right (GtkIconView *icon_view,
3900                                       gint         count)
3901 {
3902   GtkIconViewItem *item;
3903   GtkCellRenderer *cell = NULL;
3904   gboolean dirty = FALSE;
3905   gint step;
3906   GtkDirectionType direction;
3907
3908   if (!gtk_widget_has_focus (GTK_WIDGET (icon_view)))
3909     return;
3910
3911   direction = count < 0 ? GTK_DIR_LEFT : GTK_DIR_RIGHT;
3912
3913   if (!icon_view->priv->cursor_item)
3914     {
3915       GList *list;
3916
3917       if (count > 0)
3918         list = icon_view->priv->items;
3919       else
3920         list = g_list_last (icon_view->priv->items);
3921
3922       if (list)
3923         {
3924           item = list->data;
3925
3926           /* Give focus to the first cell initially */
3927           _gtk_icon_view_set_cell_data (icon_view, item);
3928           gtk_cell_area_focus (icon_view->priv->cell_area, direction);
3929         }
3930       else
3931         {
3932           item = NULL;
3933         }
3934     }
3935   else
3936     {
3937       item = icon_view->priv->cursor_item;
3938       step = count > 0 ? 1 : -1;
3939
3940       /* Save the current focus cell in case we hit the edge */
3941       cell = gtk_cell_area_get_focus_cell (icon_view->priv->cell_area);
3942
3943       while (item)
3944         {
3945           _gtk_icon_view_set_cell_data (icon_view, item);
3946
3947           if (gtk_cell_area_focus (icon_view->priv->cell_area, direction))
3948             break;
3949
3950           item = find_item (icon_view, item, 0, step);
3951         }
3952     }
3953
3954   if (!item)
3955     {
3956       if (!gtk_widget_keynav_failed (GTK_WIDGET (icon_view), direction))
3957         {
3958           GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (icon_view));
3959           if (toplevel)
3960             gtk_widget_child_focus (toplevel,
3961                                     direction == GTK_DIR_LEFT ?
3962                                     GTK_DIR_TAB_BACKWARD :
3963                                     GTK_DIR_TAB_FORWARD);
3964
3965         }
3966
3967       gtk_cell_area_set_focus_cell (icon_view->priv->cell_area, cell);
3968       return;
3969     }
3970
3971   if (icon_view->priv->modify_selection_pressed ||
3972       !icon_view->priv->extend_selection_pressed ||
3973       !icon_view->priv->anchor_item ||
3974       icon_view->priv->selection_mode != GTK_SELECTION_MULTIPLE)
3975     icon_view->priv->anchor_item = item;
3976
3977   cell = gtk_cell_area_get_focus_cell (icon_view->priv->cell_area);
3978   _gtk_icon_view_set_cursor_item (icon_view, item, cell);
3979
3980   if (!icon_view->priv->modify_selection_pressed &&
3981       icon_view->priv->selection_mode != GTK_SELECTION_NONE)
3982     {
3983       dirty = gtk_icon_view_unselect_all_internal (icon_view);
3984       dirty = gtk_icon_view_select_all_between (icon_view,
3985                                                 icon_view->priv->anchor_item,
3986                                                 item) || dirty;
3987     }
3988
3989   gtk_icon_view_scroll_to_item (icon_view, item);
3990
3991   if (dirty)
3992     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
3993 }
3994
3995 static void
3996 gtk_icon_view_move_cursor_start_end (GtkIconView *icon_view,
3997                                      gint         count)
3998 {
3999   GtkIconViewItem *item;
4000   GList *list;
4001   gboolean dirty = FALSE;
4002
4003   if (!gtk_widget_has_focus (GTK_WIDGET (icon_view)))
4004     return;
4005
4006   if (count < 0)
4007     list = icon_view->priv->items;
4008   else
4009     list = g_list_last (icon_view->priv->items);
4010
4011   item = list ? list->data : NULL;
4012
4013   if (item == icon_view->priv->cursor_item)
4014     gtk_widget_error_bell (GTK_WIDGET (icon_view));
4015
4016   if (!item)
4017     return;
4018
4019   if (icon_view->priv->modify_selection_pressed ||
4020       !icon_view->priv->extend_selection_pressed ||
4021       !icon_view->priv->anchor_item ||
4022       icon_view->priv->selection_mode != GTK_SELECTION_MULTIPLE)
4023     icon_view->priv->anchor_item = item;
4024
4025   _gtk_icon_view_set_cursor_item (icon_view, item, NULL);
4026
4027   if (!icon_view->priv->modify_selection_pressed &&
4028       icon_view->priv->selection_mode != GTK_SELECTION_NONE)
4029     {
4030       dirty = gtk_icon_view_unselect_all_internal (icon_view);
4031       dirty = gtk_icon_view_select_all_between (icon_view,
4032                                                 icon_view->priv->anchor_item,
4033                                                 item) || dirty;
4034     }
4035
4036   gtk_icon_view_scroll_to_item (icon_view, item);
4037
4038   if (dirty)
4039     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
4040 }
4041
4042 /**
4043  * gtk_icon_view_scroll_to_path:
4044  * @icon_view: A #GtkIconView.
4045  * @path: The path of the item to move to.
4046  * @use_align: whether to use alignment arguments, or %FALSE.
4047  * @row_align: The vertical alignment of the item specified by @path.
4048  * @col_align: The horizontal alignment of the item specified by @path.
4049  *
4050  * Moves the alignments of @icon_view to the position specified by @path.
4051  * @row_align determines where the row is placed, and @col_align determines
4052  * where @column is placed.  Both are expected to be between 0.0 and 1.0.
4053  * 0.0 means left/top alignment, 1.0 means right/bottom alignment, 0.5 means
4054  * center.
4055  *
4056  * If @use_align is %FALSE, then the alignment arguments are ignored, and the
4057  * tree does the minimum amount of work to scroll the item onto the screen.
4058  * This means that the item will be scrolled to the edge closest to its current
4059  * position.  If the item is currently visible on the screen, nothing is done.
4060  *
4061  * This function only works if the model is set, and @path is a valid row on
4062  * the model. If the model changes before the @icon_view is realized, the
4063  * centered path will be modified to reflect this change.
4064  *
4065  * Since: 2.8
4066  **/
4067 void
4068 gtk_icon_view_scroll_to_path (GtkIconView *icon_view,
4069                               GtkTreePath *path,
4070                               gboolean     use_align,
4071                               gfloat       row_align,
4072                               gfloat       col_align)
4073 {
4074   GtkIconViewItem *item = NULL;
4075   GtkWidget *widget;
4076
4077   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4078   g_return_if_fail (path != NULL);
4079   g_return_if_fail (row_align >= 0.0 && row_align <= 1.0);
4080   g_return_if_fail (col_align >= 0.0 && col_align <= 1.0);
4081
4082   widget = GTK_WIDGET (icon_view);
4083
4084   if (gtk_tree_path_get_depth (path) > 0)
4085     item = g_list_nth_data (icon_view->priv->items,
4086                             gtk_tree_path_get_indices(path)[0]);
4087
4088   if (!item || item->cell_area.width < 0 ||
4089       !gtk_widget_get_realized (widget))
4090     {
4091       if (icon_view->priv->scroll_to_path)
4092         gtk_tree_row_reference_free (icon_view->priv->scroll_to_path);
4093
4094       icon_view->priv->scroll_to_path = NULL;
4095
4096       if (path)
4097         icon_view->priv->scroll_to_path = gtk_tree_row_reference_new_proxy (G_OBJECT (icon_view), icon_view->priv->model, path);
4098
4099       icon_view->priv->scroll_to_use_align = use_align;
4100       icon_view->priv->scroll_to_row_align = row_align;
4101       icon_view->priv->scroll_to_col_align = col_align;
4102
4103       return;
4104     }
4105
4106   if (use_align)
4107     {
4108       GtkAllocation allocation;
4109       gint x, y;
4110       gfloat offset;
4111       GdkRectangle item_area =
4112         {
4113           item->cell_area.x - icon_view->priv->item_padding,
4114           item->cell_area.y - icon_view->priv->item_padding,
4115           item->cell_area.width  + icon_view->priv->item_padding * 2,
4116           item->cell_area.height + icon_view->priv->item_padding * 2
4117         };
4118
4119       gdk_window_get_position (icon_view->priv->bin_window, &x, &y);
4120
4121       gtk_widget_get_allocation (widget, &allocation);
4122
4123       offset = y + item_area.y - row_align * (allocation.height - item_area.height);
4124
4125       gtk_adjustment_set_value (icon_view->priv->vadjustment,
4126                                 gtk_adjustment_get_value (icon_view->priv->vadjustment) + offset);
4127
4128       offset = x + item_area.x - col_align * (allocation.width - item_area.width);
4129
4130       gtk_adjustment_set_value (icon_view->priv->hadjustment,
4131                                 gtk_adjustment_get_value (icon_view->priv->hadjustment) + offset);
4132
4133       gtk_adjustment_changed (icon_view->priv->hadjustment);
4134       gtk_adjustment_changed (icon_view->priv->vadjustment);
4135     }
4136   else
4137     gtk_icon_view_scroll_to_item (icon_view, item);
4138 }
4139
4140
4141 static void
4142 gtk_icon_view_scroll_to_item (GtkIconView     *icon_view,
4143                               GtkIconViewItem *item)
4144 {
4145   GtkIconViewPrivate *priv = icon_view->priv;
4146   GtkWidget *widget = GTK_WIDGET (icon_view);
4147   GtkAdjustment *hadj, *vadj;
4148   GtkAllocation allocation;
4149   gint x, y;
4150   GdkRectangle item_area;
4151
4152   item_area.x = item->cell_area.x - priv->item_padding;
4153   item_area.y = item->cell_area.y - priv->item_padding;
4154   item_area.width = item->cell_area.width  + priv->item_padding * 2;
4155   item_area.height = item->cell_area.height + priv->item_padding * 2;
4156
4157   gdk_window_get_position (icon_view->priv->bin_window, &x, &y);
4158   gtk_widget_get_allocation (widget, &allocation);
4159
4160   hadj = icon_view->priv->hadjustment;
4161   vadj = icon_view->priv->vadjustment;
4162
4163   if (y + item_area.y < 0)
4164     gtk_adjustment_set_value (vadj,
4165                               gtk_adjustment_get_value (vadj)
4166                                 + y + item_area.y);
4167   else if (y + item_area.y + item_area.height > allocation.height)
4168     gtk_adjustment_set_value (vadj,
4169                               gtk_adjustment_get_value (vadj)
4170                                 + y + item_area.y + item_area.height - allocation.height);
4171
4172   if (x + item_area.x < 0)
4173     gtk_adjustment_set_value (hadj,
4174                               gtk_adjustment_get_value (hadj)
4175                                 + x + item_area.x);
4176   else if (x + item_area.x + item_area.width > allocation.width)
4177     gtk_adjustment_set_value (hadj,
4178                               gtk_adjustment_get_value (hadj)
4179                                 + x + item_area.x + item_area.width - allocation.width);
4180
4181   gtk_adjustment_changed (hadj);
4182   gtk_adjustment_changed (vadj);
4183 }
4184
4185 /* GtkCellLayout implementation */
4186
4187 static void
4188 gtk_icon_view_ensure_cell_area (GtkIconView *icon_view,
4189                                 GtkCellArea *cell_area)
4190 {
4191   GtkIconViewPrivate *priv = icon_view->priv;
4192
4193   if (priv->cell_area)
4194     return;
4195
4196   if (cell_area)
4197     priv->cell_area = cell_area;
4198   else
4199     priv->cell_area = gtk_cell_area_box_new ();
4200
4201   g_object_ref_sink (priv->cell_area);
4202
4203   if (GTK_IS_ORIENTABLE (priv->cell_area))
4204     gtk_orientable_set_orientation (GTK_ORIENTABLE (priv->cell_area), priv->item_orientation);
4205
4206   priv->cell_area_context = gtk_cell_area_create_context (priv->cell_area);
4207
4208   priv->add_editable_id =
4209     g_signal_connect (priv->cell_area, "add-editable",
4210                       G_CALLBACK (gtk_icon_view_add_editable), icon_view);
4211   priv->remove_editable_id =
4212     g_signal_connect (priv->cell_area, "remove-editable",
4213                       G_CALLBACK (gtk_icon_view_remove_editable), icon_view);
4214
4215   update_text_cell (icon_view);
4216   update_pixbuf_cell (icon_view);
4217 }
4218
4219 static GtkCellArea *
4220 gtk_icon_view_cell_layout_get_area (GtkCellLayout *cell_layout)
4221 {
4222   GtkIconView *icon_view = GTK_ICON_VIEW (cell_layout);
4223   GtkIconViewPrivate *priv = icon_view->priv;
4224
4225   if (G_UNLIKELY (!priv->cell_area))
4226     gtk_icon_view_ensure_cell_area (icon_view, NULL);
4227
4228   return icon_view->priv->cell_area;
4229 }
4230
4231 void
4232 _gtk_icon_view_set_cell_data (GtkIconView     *icon_view,
4233                               GtkIconViewItem *item)
4234 {
4235   GtkTreeIter iter;
4236   GtkTreePath *path;
4237
4238   path = gtk_tree_path_new_from_indices (item->index, -1);
4239   if (!gtk_tree_model_get_iter (icon_view->priv->model, &iter, path))
4240     return;
4241   gtk_tree_path_free (path);
4242
4243   gtk_cell_area_apply_attributes (icon_view->priv->cell_area,
4244                                   icon_view->priv->model,
4245                                   &iter, FALSE, FALSE);
4246 }
4247
4248
4249
4250 /* Public API */
4251
4252
4253 /**
4254  * gtk_icon_view_new:
4255  *
4256  * Creates a new #GtkIconView widget
4257  *
4258  * Return value: A newly created #GtkIconView widget
4259  *
4260  * Since: 2.6
4261  **/
4262 GtkWidget *
4263 gtk_icon_view_new (void)
4264 {
4265   return g_object_new (GTK_TYPE_ICON_VIEW, NULL);
4266 }
4267
4268 /**
4269  * gtk_icon_view_new_with_area:
4270  * @area: the #GtkCellArea to use to layout cells
4271  *
4272  * Creates a new #GtkIconView widget using the
4273  * specified @area to layout cells inside the icons.
4274  *
4275  * Return value: A newly created #GtkIconView widget
4276  *
4277  * Since: 3.0
4278  **/
4279 GtkWidget *
4280 gtk_icon_view_new_with_area (GtkCellArea *area)
4281 {
4282   return g_object_new (GTK_TYPE_ICON_VIEW, "cell-area", area, NULL);
4283 }
4284
4285 /**
4286  * gtk_icon_view_new_with_model:
4287  * @model: The model.
4288  *
4289  * Creates a new #GtkIconView widget with the model @model.
4290  *
4291  * Return value: A newly created #GtkIconView widget.
4292  *
4293  * Since: 2.6
4294  **/
4295 GtkWidget *
4296 gtk_icon_view_new_with_model (GtkTreeModel *model)
4297 {
4298   return g_object_new (GTK_TYPE_ICON_VIEW, "model", model, NULL);
4299 }
4300
4301 /**
4302  * gtk_icon_view_convert_widget_to_bin_window_coords:
4303  * @icon_view: a #GtkIconView
4304  * @wx: X coordinate relative to the widget
4305  * @wy: Y coordinate relative to the widget
4306  * @bx: (out): return location for bin_window X coordinate
4307  * @by: (out): return location for bin_window Y coordinate
4308  *
4309  * Converts widget coordinates to coordinates for the bin_window,
4310  * as expected by e.g. gtk_icon_view_get_path_at_pos().
4311  *
4312  * Since: 2.12
4313  */
4314 void
4315 gtk_icon_view_convert_widget_to_bin_window_coords (GtkIconView *icon_view,
4316                                                    gint         wx,
4317                                                    gint         wy,
4318                                                    gint        *bx,
4319                                                    gint        *by)
4320 {
4321   gint x, y;
4322
4323   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4324
4325   if (icon_view->priv->bin_window)
4326     gdk_window_get_position (icon_view->priv->bin_window, &x, &y);
4327   else
4328     x = y = 0;
4329
4330   if (bx)
4331     *bx = wx - x;
4332   if (by)
4333     *by = wy - y;
4334 }
4335
4336 /**
4337  * gtk_icon_view_get_path_at_pos:
4338  * @icon_view: A #GtkIconView.
4339  * @x: The x position to be identified
4340  * @y: The y position to be identified
4341  *
4342  * Finds the path at the point (@x, @y), relative to bin_window coordinates.
4343  * See gtk_icon_view_get_item_at_pos(), if you are also interested in
4344  * the cell at the specified position.
4345  * See gtk_icon_view_convert_widget_to_bin_window_coords() for converting
4346  * widget coordinates to bin_window coordinates.
4347  *
4348  * Return value: The #GtkTreePath corresponding to the icon or %NULL
4349  * if no icon exists at that position.
4350  *
4351  * Since: 2.6
4352  **/
4353 GtkTreePath *
4354 gtk_icon_view_get_path_at_pos (GtkIconView *icon_view,
4355                                gint         x,
4356                                gint         y)
4357 {
4358   GtkIconViewItem *item;
4359   GtkTreePath *path;
4360
4361   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), NULL);
4362
4363   item = _gtk_icon_view_get_item_at_coords (icon_view, x, y, TRUE, NULL);
4364
4365   if (!item)
4366     return NULL;
4367
4368   path = gtk_tree_path_new_from_indices (item->index, -1);
4369
4370   return path;
4371 }
4372
4373 /**
4374  * gtk_icon_view_get_item_at_pos:
4375  * @icon_view: A #GtkIconView.
4376  * @x: The x position to be identified
4377  * @y: The y position to be identified
4378  * @path: (out) (allow-none): Return location for the path, or %NULL
4379  * @cell: (out) (allow-none): Return location for the renderer
4380  *   responsible for the cell at (@x, @y), or %NULL
4381  *
4382  * Finds the path at the point (@x, @y), relative to bin_window coordinates.
4383  * In contrast to gtk_icon_view_get_path_at_pos(), this function also
4384  * obtains the cell at the specified position. The returned path should
4385  * be freed with gtk_tree_path_free().
4386  * See gtk_icon_view_convert_widget_to_bin_window_coords() for converting
4387  * widget coordinates to bin_window coordinates.
4388  *
4389  * Return value: %TRUE if an item exists at the specified position
4390  *
4391  * Since: 2.8
4392  **/
4393 gboolean
4394 gtk_icon_view_get_item_at_pos (GtkIconView      *icon_view,
4395                                gint              x,
4396                                gint              y,
4397                                GtkTreePath     **path,
4398                                GtkCellRenderer **cell)
4399 {
4400   GtkIconViewItem *item;
4401   GtkCellRenderer *renderer = NULL;
4402
4403   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
4404
4405   item = _gtk_icon_view_get_item_at_coords (icon_view, x, y, TRUE, &renderer);
4406
4407   if (path != NULL)
4408     {
4409       if (item != NULL)
4410         *path = gtk_tree_path_new_from_indices (item->index, -1);
4411       else
4412         *path = NULL;
4413     }
4414
4415   if (cell != NULL)
4416     *cell = renderer;
4417
4418   return (item != NULL);
4419 }
4420
4421 /**
4422  * gtk_icon_view_set_tooltip_item:
4423  * @icon_view: a #GtkIconView
4424  * @tooltip: a #GtkTooltip
4425  * @path: a #GtkTreePath
4426  *
4427  * Sets the tip area of @tooltip to be the area covered by the item at @path.
4428  * See also gtk_icon_view_set_tooltip_column() for a simpler alternative.
4429  * See also gtk_tooltip_set_tip_area().
4430  *
4431  * Since: 2.12
4432  */
4433 void
4434 gtk_icon_view_set_tooltip_item (GtkIconView     *icon_view,
4435                                 GtkTooltip      *tooltip,
4436                                 GtkTreePath     *path)
4437 {
4438   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4439   g_return_if_fail (GTK_IS_TOOLTIP (tooltip));
4440
4441   gtk_icon_view_set_tooltip_cell (icon_view, tooltip, path, NULL);
4442 }
4443
4444 /**
4445  * gtk_icon_view_set_tooltip_cell:
4446  * @icon_view: a #GtkIconView
4447  * @tooltip: a #GtkTooltip
4448  * @path: a #GtkTreePath
4449  * @cell: (allow-none): a #GtkCellRenderer or %NULL
4450  *
4451  * Sets the tip area of @tooltip to the area which @cell occupies in
4452  * the item pointed to by @path. See also gtk_tooltip_set_tip_area().
4453  *
4454  * See also gtk_icon_view_set_tooltip_column() for a simpler alternative.
4455  *
4456  * Since: 2.12
4457  */
4458 void
4459 gtk_icon_view_set_tooltip_cell (GtkIconView     *icon_view,
4460                                 GtkTooltip      *tooltip,
4461                                 GtkTreePath     *path,
4462                                 GtkCellRenderer *cell)
4463 {
4464   GdkRectangle rect;
4465   GtkIconViewItem *item = NULL;
4466   gint x, y;
4467
4468   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4469   g_return_if_fail (GTK_IS_TOOLTIP (tooltip));
4470   g_return_if_fail (cell == NULL || GTK_IS_CELL_RENDERER (cell));
4471
4472   if (gtk_tree_path_get_depth (path) > 0)
4473     item = g_list_nth_data (icon_view->priv->items,
4474                             gtk_tree_path_get_indices(path)[0]);
4475
4476   if (!item)
4477     return;
4478
4479   if (cell)
4480     {
4481       GtkCellAreaContext *context;
4482
4483       context = g_ptr_array_index (icon_view->priv->row_contexts, item->row);
4484       _gtk_icon_view_set_cell_data (icon_view, item);
4485       gtk_cell_area_get_cell_allocation (icon_view->priv->cell_area, context,
4486                                          GTK_WIDGET (icon_view),
4487                                          cell, &item->cell_area, &rect);
4488     }
4489   else
4490     {
4491       rect.x = item->cell_area.x - icon_view->priv->item_padding;
4492       rect.y = item->cell_area.y - icon_view->priv->item_padding;
4493       rect.width  = item->cell_area.width  + icon_view->priv->item_padding * 2;
4494       rect.height = item->cell_area.height + icon_view->priv->item_padding * 2;
4495     }
4496
4497   if (icon_view->priv->bin_window)
4498     {
4499       gdk_window_get_position (icon_view->priv->bin_window, &x, &y);
4500       rect.x += x;
4501       rect.y += y;
4502     }
4503
4504   gtk_tooltip_set_tip_area (tooltip, &rect);
4505 }
4506
4507
4508 /**
4509  * gtk_icon_view_get_tooltip_context:
4510  * @icon_view: an #GtkIconView
4511  * @x: (inout): the x coordinate (relative to widget coordinates)
4512  * @y: (inout): the y coordinate (relative to widget coordinates)
4513  * @keyboard_tip: whether this is a keyboard tooltip or not
4514  * @model: (out) (allow-none): a pointer to receive a #GtkTreeModel or %NULL
4515  * @path: (out) (allow-none): a pointer to receive a #GtkTreePath or %NULL
4516  * @iter: (out) (allow-none): a pointer to receive a #GtkTreeIter or %NULL
4517  *
4518  * This function is supposed to be used in a #GtkWidget::query-tooltip
4519  * signal handler for #GtkIconView.  The @x, @y and @keyboard_tip values
4520  * which are received in the signal handler, should be passed to this
4521  * function without modification.
4522  *
4523  * The return value indicates whether there is an icon view item at the given
4524  * coordinates (%TRUE) or not (%FALSE) for mouse tooltips. For keyboard
4525  * tooltips the item returned will be the cursor item. When %TRUE, then any of
4526  * @model, @path and @iter which have been provided will be set to point to
4527  * that row and the corresponding model. @x and @y will always be converted
4528  * to be relative to @icon_view's bin_window if @keyboard_tooltip is %FALSE.
4529  *
4530  * Return value: whether or not the given tooltip context points to a item
4531  *
4532  * Since: 2.12
4533  */
4534 gboolean
4535 gtk_icon_view_get_tooltip_context (GtkIconView   *icon_view,
4536                                    gint          *x,
4537                                    gint          *y,
4538                                    gboolean       keyboard_tip,
4539                                    GtkTreeModel **model,
4540                                    GtkTreePath  **path,
4541                                    GtkTreeIter   *iter)
4542 {
4543   GtkTreePath *tmppath = NULL;
4544
4545   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
4546   g_return_val_if_fail (x != NULL, FALSE);
4547   g_return_val_if_fail (y != NULL, FALSE);
4548
4549   if (keyboard_tip)
4550     {
4551       gtk_icon_view_get_cursor (icon_view, &tmppath, NULL);
4552
4553       if (!tmppath)
4554         return FALSE;
4555     }
4556   else
4557     {
4558       gtk_icon_view_convert_widget_to_bin_window_coords (icon_view, *x, *y,
4559                                                          x, y);
4560
4561       if (!gtk_icon_view_get_item_at_pos (icon_view, *x, *y, &tmppath, NULL))
4562         return FALSE;
4563     }
4564
4565   if (model)
4566     *model = gtk_icon_view_get_model (icon_view);
4567
4568   if (iter)
4569     gtk_tree_model_get_iter (gtk_icon_view_get_model (icon_view),
4570                              iter, tmppath);
4571
4572   if (path)
4573     *path = tmppath;
4574   else
4575     gtk_tree_path_free (tmppath);
4576
4577   return TRUE;
4578 }
4579
4580 static gboolean
4581 gtk_icon_view_set_tooltip_query_cb (GtkWidget  *widget,
4582                                     gint        x,
4583                                     gint        y,
4584                                     gboolean    keyboard_tip,
4585                                     GtkTooltip *tooltip,
4586                                     gpointer    data)
4587 {
4588   gchar *str;
4589   GtkTreeIter iter;
4590   GtkTreePath *path;
4591   GtkTreeModel *model;
4592   GtkIconView *icon_view = GTK_ICON_VIEW (widget);
4593
4594   if (!gtk_icon_view_get_tooltip_context (GTK_ICON_VIEW (widget),
4595                                           &x, &y,
4596                                           keyboard_tip,
4597                                           &model, &path, &iter))
4598     return FALSE;
4599
4600   gtk_tree_model_get (model, &iter, icon_view->priv->tooltip_column, &str, -1);
4601
4602   if (!str)
4603     {
4604       gtk_tree_path_free (path);
4605       return FALSE;
4606     }
4607
4608   gtk_tooltip_set_markup (tooltip, str);
4609   gtk_icon_view_set_tooltip_item (icon_view, tooltip, path);
4610
4611   gtk_tree_path_free (path);
4612   g_free (str);
4613
4614   return TRUE;
4615 }
4616
4617
4618 /**
4619  * gtk_icon_view_set_tooltip_column:
4620  * @icon_view: a #GtkIconView
4621  * @column: an integer, which is a valid column number for @icon_view's model
4622  *
4623  * If you only plan to have simple (text-only) tooltips on full items, you
4624  * can use this function to have #GtkIconView handle these automatically
4625  * for you. @column should be set to the column in @icon_view's model
4626  * containing the tooltip texts, or -1 to disable this feature.
4627  *
4628  * When enabled, #GtkWidget:has-tooltip will be set to %TRUE and
4629  * @icon_view will connect a #GtkWidget::query-tooltip signal handler.
4630  *
4631  * Note that the signal handler sets the text with gtk_tooltip_set_markup(),
4632  * so &amp;, &lt;, etc have to be escaped in the text.
4633  *
4634  * Since: 2.12
4635  */
4636 void
4637 gtk_icon_view_set_tooltip_column (GtkIconView *icon_view,
4638                                   gint         column)
4639 {
4640   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4641
4642   if (column == icon_view->priv->tooltip_column)
4643     return;
4644
4645   if (column == -1)
4646     {
4647       g_signal_handlers_disconnect_by_func (icon_view,
4648                                             gtk_icon_view_set_tooltip_query_cb,
4649                                             NULL);
4650       gtk_widget_set_has_tooltip (GTK_WIDGET (icon_view), FALSE);
4651     }
4652   else
4653     {
4654       if (icon_view->priv->tooltip_column == -1)
4655         {
4656           g_signal_connect (icon_view, "query-tooltip",
4657                             G_CALLBACK (gtk_icon_view_set_tooltip_query_cb), NULL);
4658           gtk_widget_set_has_tooltip (GTK_WIDGET (icon_view), TRUE);
4659         }
4660     }
4661
4662   icon_view->priv->tooltip_column = column;
4663   g_object_notify (G_OBJECT (icon_view), "tooltip-column");
4664 }
4665
4666 /**
4667  * gtk_icon_view_get_tooltip_column:
4668  * @icon_view: a #GtkIconView
4669  *
4670  * Returns the column of @icon_view's model which is being used for
4671  * displaying tooltips on @icon_view's rows.
4672  *
4673  * Return value: the index of the tooltip column that is currently being
4674  * used, or -1 if this is disabled.
4675  *
4676  * Since: 2.12
4677  */
4678 gint
4679 gtk_icon_view_get_tooltip_column (GtkIconView *icon_view)
4680 {
4681   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), 0);
4682
4683   return icon_view->priv->tooltip_column;
4684 }
4685
4686 /**
4687  * gtk_icon_view_get_visible_range:
4688  * @icon_view: A #GtkIconView
4689  * @start_path: (out) (allow-none): Return location for start of region,
4690  *              or %NULL
4691  * @end_path: (out) (allow-none): Return location for end of region, or %NULL
4692  *
4693  * Sets @start_path and @end_path to be the first and last visible path.
4694  * Note that there may be invisible paths in between.
4695  *
4696  * Both paths should be freed with gtk_tree_path_free() after use.
4697  *
4698  * Return value: %TRUE, if valid paths were placed in @start_path and @end_path
4699  *
4700  * Since: 2.8
4701  **/
4702 gboolean
4703 gtk_icon_view_get_visible_range (GtkIconView  *icon_view,
4704                                  GtkTreePath **start_path,
4705                                  GtkTreePath **end_path)
4706 {
4707   gint start_index = -1;
4708   gint end_index = -1;
4709   GList *icons;
4710
4711   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
4712
4713   if (icon_view->priv->hadjustment == NULL ||
4714       icon_view->priv->vadjustment == NULL)
4715     return FALSE;
4716
4717   if (start_path == NULL && end_path == NULL)
4718     return FALSE;
4719
4720   for (icons = icon_view->priv->items; icons; icons = icons->next)
4721     {
4722       GtkIconViewItem *item = icons->data;
4723       GdkRectangle    *item_area = &item->cell_area;
4724
4725       if ((item_area->x + item_area->width >= (int)gtk_adjustment_get_value (icon_view->priv->hadjustment)) &&
4726           (item_area->y + item_area->height >= (int)gtk_adjustment_get_value (icon_view->priv->vadjustment)) &&
4727           (item_area->x <=
4728            (int) (gtk_adjustment_get_value (icon_view->priv->hadjustment) +
4729                   gtk_adjustment_get_page_size (icon_view->priv->hadjustment))) &&
4730           (item_area->y <=
4731            (int) (gtk_adjustment_get_value (icon_view->priv->vadjustment) +
4732                   gtk_adjustment_get_page_size (icon_view->priv->vadjustment))))
4733         {
4734           if (start_index == -1)
4735             start_index = item->index;
4736           end_index = item->index;
4737         }
4738     }
4739
4740   if (start_path && start_index != -1)
4741     *start_path = gtk_tree_path_new_from_indices (start_index, -1);
4742   if (end_path && end_index != -1)
4743     *end_path = gtk_tree_path_new_from_indices (end_index, -1);
4744
4745   return start_index != -1;
4746 }
4747
4748 /**
4749  * gtk_icon_view_selected_foreach:
4750  * @icon_view: A #GtkIconView.
4751  * @func: (scope call): The function to call for each selected icon.
4752  * @data: User data to pass to the function.
4753  *
4754  * Calls a function for each selected icon. Note that the model or
4755  * selection cannot be modified from within this function.
4756  *
4757  * Since: 2.6
4758  **/
4759 void
4760 gtk_icon_view_selected_foreach (GtkIconView           *icon_view,
4761                                 GtkIconViewForeachFunc func,
4762                                 gpointer               data)
4763 {
4764   GList *list;
4765
4766   for (list = icon_view->priv->items; list; list = list->next)
4767     {
4768       GtkIconViewItem *item = list->data;
4769       GtkTreePath *path = gtk_tree_path_new_from_indices (item->index, -1);
4770
4771       if (item->selected)
4772         (* func) (icon_view, path, data);
4773
4774       gtk_tree_path_free (path);
4775     }
4776 }
4777
4778 /**
4779  * gtk_icon_view_set_selection_mode:
4780  * @icon_view: A #GtkIconView.
4781  * @mode: The selection mode
4782  *
4783  * Sets the selection mode of the @icon_view.
4784  *
4785  * Since: 2.6
4786  **/
4787 void
4788 gtk_icon_view_set_selection_mode (GtkIconView      *icon_view,
4789                                   GtkSelectionMode  mode)
4790 {
4791   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4792
4793   if (mode == icon_view->priv->selection_mode)
4794     return;
4795
4796   if (mode == GTK_SELECTION_NONE ||
4797       icon_view->priv->selection_mode == GTK_SELECTION_MULTIPLE)
4798     gtk_icon_view_unselect_all (icon_view);
4799
4800   icon_view->priv->selection_mode = mode;
4801
4802   g_object_notify (G_OBJECT (icon_view), "selection-mode");
4803 }
4804
4805 /**
4806  * gtk_icon_view_get_selection_mode:
4807  * @icon_view: A #GtkIconView.
4808  *
4809  * Gets the selection mode of the @icon_view.
4810  *
4811  * Return value: the current selection mode
4812  *
4813  * Since: 2.6
4814  **/
4815 GtkSelectionMode
4816 gtk_icon_view_get_selection_mode (GtkIconView *icon_view)
4817 {
4818   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), GTK_SELECTION_SINGLE);
4819
4820   return icon_view->priv->selection_mode;
4821 }
4822
4823 /**
4824  * gtk_icon_view_set_model:
4825  * @icon_view: A #GtkIconView.
4826  * @model: (allow-none): The model.
4827  *
4828  * Sets the model for a #GtkIconView.
4829  * If the @icon_view already has a model set, it will remove
4830  * it before setting the new model.  If @model is %NULL, then
4831  * it will unset the old model.
4832  *
4833  * Since: 2.6
4834  **/
4835 void
4836 gtk_icon_view_set_model (GtkIconView *icon_view,
4837                          GtkTreeModel *model)
4838 {
4839   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
4840   g_return_if_fail (model == NULL || GTK_IS_TREE_MODEL (model));
4841
4842   if (icon_view->priv->model == model)
4843     return;
4844
4845   if (icon_view->priv->scroll_to_path)
4846     {
4847       gtk_tree_row_reference_free (icon_view->priv->scroll_to_path);
4848       icon_view->priv->scroll_to_path = NULL;
4849     }
4850
4851   /* The area can be NULL while disposing */
4852   if (icon_view->priv->cell_area)
4853     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
4854
4855   if (model)
4856     {
4857       GType column_type;
4858
4859       if (icon_view->priv->pixbuf_column != -1)
4860         {
4861           column_type = gtk_tree_model_get_column_type (model,
4862                                                         icon_view->priv->pixbuf_column);
4863
4864           g_return_if_fail (column_type == GDK_TYPE_PIXBUF);
4865         }
4866
4867       if (icon_view->priv->text_column != -1)
4868         {
4869           column_type = gtk_tree_model_get_column_type (model,
4870                                                         icon_view->priv->text_column);
4871
4872           g_return_if_fail (column_type == G_TYPE_STRING);
4873         }
4874
4875       if (icon_view->priv->markup_column != -1)
4876         {
4877           column_type = gtk_tree_model_get_column_type (model,
4878                                                         icon_view->priv->markup_column);
4879
4880           g_return_if_fail (column_type == G_TYPE_STRING);
4881         }
4882
4883     }
4884
4885   if (icon_view->priv->model)
4886     {
4887       g_signal_handlers_disconnect_by_func (icon_view->priv->model,
4888                                             gtk_icon_view_row_changed,
4889                                             icon_view);
4890       g_signal_handlers_disconnect_by_func (icon_view->priv->model,
4891                                             gtk_icon_view_row_inserted,
4892                                             icon_view);
4893       g_signal_handlers_disconnect_by_func (icon_view->priv->model,
4894                                             gtk_icon_view_row_deleted,
4895                                             icon_view);
4896       g_signal_handlers_disconnect_by_func (icon_view->priv->model,
4897                                             gtk_icon_view_rows_reordered,
4898                                             icon_view);
4899
4900       g_object_unref (icon_view->priv->model);
4901
4902       g_list_free_full (icon_view->priv->items, (GDestroyNotify) gtk_icon_view_item_free);
4903       icon_view->priv->items = NULL;
4904       icon_view->priv->anchor_item = NULL;
4905       icon_view->priv->cursor_item = NULL;
4906       icon_view->priv->last_single_clicked = NULL;
4907       icon_view->priv->last_prelight = NULL;
4908       icon_view->priv->width = 0;
4909       icon_view->priv->height = 0;
4910     }
4911
4912   icon_view->priv->model = model;
4913
4914   if (icon_view->priv->model)
4915     {
4916       g_object_ref (icon_view->priv->model);
4917       g_signal_connect (icon_view->priv->model,
4918                         "row-changed",
4919                         G_CALLBACK (gtk_icon_view_row_changed),
4920                         icon_view);
4921       g_signal_connect (icon_view->priv->model,
4922                         "row-inserted",
4923                         G_CALLBACK (gtk_icon_view_row_inserted),
4924                         icon_view);
4925       g_signal_connect (icon_view->priv->model,
4926                         "row-deleted",
4927                         G_CALLBACK (gtk_icon_view_row_deleted),
4928                         icon_view);
4929       g_signal_connect (icon_view->priv->model,
4930                         "rows-reordered",
4931                         G_CALLBACK (gtk_icon_view_rows_reordered),
4932                         icon_view);
4933
4934       gtk_icon_view_build_items (icon_view);
4935     }
4936
4937   g_object_notify (G_OBJECT (icon_view), "model");
4938
4939   gtk_widget_queue_resize (GTK_WIDGET (icon_view));
4940 }
4941
4942 /**
4943  * gtk_icon_view_get_model:
4944  * @icon_view: a #GtkIconView
4945  *
4946  * Returns the model the #GtkIconView is based on.  Returns %NULL if the
4947  * model is unset.
4948  *
4949  * Return value: (transfer none): A #GtkTreeModel, or %NULL if none is
4950  *     currently being used.
4951  *
4952  * Since: 2.6
4953  **/
4954 GtkTreeModel *
4955 gtk_icon_view_get_model (GtkIconView *icon_view)
4956 {
4957   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), NULL);
4958
4959   return icon_view->priv->model;
4960 }
4961
4962 static void
4963 update_text_cell (GtkIconView *icon_view)
4964 {
4965   if (!icon_view->priv->cell_area)
4966     return;
4967
4968   if (icon_view->priv->text_column == -1 &&
4969       icon_view->priv->markup_column == -1)
4970     {
4971       if (icon_view->priv->text_cell != NULL)
4972         {
4973           gtk_cell_area_remove (icon_view->priv->cell_area,
4974                                 icon_view->priv->text_cell);
4975           icon_view->priv->text_cell = NULL;
4976         }
4977     }
4978   else
4979     {
4980       if (icon_view->priv->text_cell == NULL)
4981         {
4982           icon_view->priv->text_cell = gtk_cell_renderer_text_new ();
4983
4984           gtk_cell_layout_pack_end (GTK_CELL_LAYOUT (icon_view), icon_view->priv->text_cell, FALSE);
4985         }
4986
4987       if (icon_view->priv->markup_column != -1)
4988         gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (icon_view),
4989                                         icon_view->priv->text_cell,
4990                                         "markup", icon_view->priv->markup_column,
4991                                         NULL);
4992       else
4993         gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (icon_view),
4994                                         icon_view->priv->text_cell,
4995                                         "text", icon_view->priv->text_column,
4996                                         NULL);
4997
4998       if (icon_view->priv->item_orientation == GTK_ORIENTATION_VERTICAL)
4999         g_object_set (icon_view->priv->text_cell,
5000                       "alignment", PANGO_ALIGN_CENTER,
5001                       "wrap-mode", PANGO_WRAP_WORD_CHAR,
5002                       "xalign", 0.5,
5003                       "yalign", 0.0,
5004                       NULL);
5005       else
5006         g_object_set (icon_view->priv->text_cell,
5007                       "alignment", PANGO_ALIGN_LEFT,
5008                       "wrap-mode", PANGO_WRAP_WORD_CHAR,
5009                       "xalign", 0.0,
5010                       "yalign", 0.5,
5011                       NULL);
5012     }
5013 }
5014
5015 static void
5016 update_pixbuf_cell (GtkIconView *icon_view)
5017 {
5018   if (!icon_view->priv->cell_area)
5019     return;
5020
5021   if (icon_view->priv->pixbuf_column == -1)
5022     {
5023       if (icon_view->priv->pixbuf_cell != NULL)
5024         {
5025           gtk_cell_area_remove (icon_view->priv->cell_area,
5026                                 icon_view->priv->pixbuf_cell);
5027
5028           icon_view->priv->pixbuf_cell = NULL;
5029         }
5030     }
5031   else
5032     {
5033       if (icon_view->priv->pixbuf_cell == NULL)
5034         {
5035           icon_view->priv->pixbuf_cell = gtk_cell_renderer_pixbuf_new ();
5036
5037           gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (icon_view), icon_view->priv->pixbuf_cell, FALSE);
5038         }
5039
5040       gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (icon_view),
5041                                       icon_view->priv->pixbuf_cell,
5042                                       "pixbuf", icon_view->priv->pixbuf_column,
5043                                       NULL);
5044
5045       if (icon_view->priv->item_orientation == GTK_ORIENTATION_VERTICAL)
5046         g_object_set (icon_view->priv->pixbuf_cell,
5047                       "xalign", 0.5,
5048                       "yalign", 1.0,
5049                       NULL);
5050       else
5051         g_object_set (icon_view->priv->pixbuf_cell,
5052                       "xalign", 0.0,
5053                       "yalign", 0.0,
5054                       NULL);
5055     }
5056 }
5057
5058 /**
5059  * gtk_icon_view_set_text_column:
5060  * @icon_view: A #GtkIconView.
5061  * @column: A column in the currently used model, or -1 to display no text
5062  *
5063  * Sets the column with text for @icon_view to be @column. The text
5064  * column must be of type #G_TYPE_STRING.
5065  *
5066  * Since: 2.6
5067  **/
5068 void
5069 gtk_icon_view_set_text_column (GtkIconView *icon_view,
5070                                gint          column)
5071 {
5072   if (column == icon_view->priv->text_column)
5073     return;
5074
5075   if (column == -1)
5076     icon_view->priv->text_column = -1;
5077   else
5078     {
5079       if (icon_view->priv->model != NULL)
5080         {
5081           GType column_type;
5082
5083           column_type = gtk_tree_model_get_column_type (icon_view->priv->model, column);
5084
5085           g_return_if_fail (column_type == G_TYPE_STRING);
5086         }
5087
5088       icon_view->priv->text_column = column;
5089     }
5090
5091   if (icon_view->priv->cell_area)
5092     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5093
5094   update_text_cell (icon_view);
5095
5096   gtk_icon_view_invalidate_sizes (icon_view);
5097
5098   g_object_notify (G_OBJECT (icon_view), "text-column");
5099 }
5100
5101 /**
5102  * gtk_icon_view_get_text_column:
5103  * @icon_view: A #GtkIconView.
5104  *
5105  * Returns the column with text for @icon_view.
5106  *
5107  * Returns: the text column, or -1 if it's unset.
5108  *
5109  * Since: 2.6
5110  */
5111 gint
5112 gtk_icon_view_get_text_column (GtkIconView  *icon_view)
5113 {
5114   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5115
5116   return icon_view->priv->text_column;
5117 }
5118
5119 /**
5120  * gtk_icon_view_set_markup_column:
5121  * @icon_view: A #GtkIconView.
5122  * @column: A column in the currently used model, or -1 to display no text
5123  *
5124  * Sets the column with markup information for @icon_view to be
5125  * @column. The markup column must be of type #G_TYPE_STRING.
5126  * If the markup column is set to something, it overrides
5127  * the text column set by gtk_icon_view_set_text_column().
5128  *
5129  * Since: 2.6
5130  **/
5131 void
5132 gtk_icon_view_set_markup_column (GtkIconView *icon_view,
5133                                  gint         column)
5134 {
5135   if (column == icon_view->priv->markup_column)
5136     return;
5137
5138   if (column == -1)
5139     icon_view->priv->markup_column = -1;
5140   else
5141     {
5142       if (icon_view->priv->model != NULL)
5143         {
5144           GType column_type;
5145
5146           column_type = gtk_tree_model_get_column_type (icon_view->priv->model, column);
5147
5148           g_return_if_fail (column_type == G_TYPE_STRING);
5149         }
5150
5151       icon_view->priv->markup_column = column;
5152     }
5153
5154   if (icon_view->priv->cell_area)
5155     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5156
5157   update_text_cell (icon_view);
5158
5159   gtk_icon_view_invalidate_sizes (icon_view);
5160
5161   g_object_notify (G_OBJECT (icon_view), "markup-column");
5162 }
5163
5164 /**
5165  * gtk_icon_view_get_markup_column:
5166  * @icon_view: A #GtkIconView.
5167  *
5168  * Returns the column with markup text for @icon_view.
5169  *
5170  * Returns: the markup column, or -1 if it's unset.
5171  *
5172  * Since: 2.6
5173  */
5174 gint
5175 gtk_icon_view_get_markup_column (GtkIconView  *icon_view)
5176 {
5177   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5178
5179   return icon_view->priv->markup_column;
5180 }
5181
5182 /**
5183  * gtk_icon_view_set_pixbuf_column:
5184  * @icon_view: A #GtkIconView.
5185  * @column: A column in the currently used model, or -1 to disable
5186  *
5187  * Sets the column with pixbufs for @icon_view to be @column. The pixbuf
5188  * column must be of type #GDK_TYPE_PIXBUF
5189  *
5190  * Since: 2.6
5191  **/
5192 void
5193 gtk_icon_view_set_pixbuf_column (GtkIconView *icon_view,
5194                                  gint         column)
5195 {
5196   if (column == icon_view->priv->pixbuf_column)
5197     return;
5198
5199   if (column == -1)
5200     icon_view->priv->pixbuf_column = -1;
5201   else
5202     {
5203       if (icon_view->priv->model != NULL)
5204         {
5205           GType column_type;
5206
5207           column_type = gtk_tree_model_get_column_type (icon_view->priv->model, column);
5208
5209           g_return_if_fail (column_type == GDK_TYPE_PIXBUF);
5210         }
5211
5212       icon_view->priv->pixbuf_column = column;
5213     }
5214
5215   if (icon_view->priv->cell_area)
5216     gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5217
5218   update_pixbuf_cell (icon_view);
5219
5220   gtk_icon_view_invalidate_sizes (icon_view);
5221
5222   g_object_notify (G_OBJECT (icon_view), "pixbuf-column");
5223
5224 }
5225
5226 /**
5227  * gtk_icon_view_get_pixbuf_column:
5228  * @icon_view: A #GtkIconView.
5229  *
5230  * Returns the column with pixbufs for @icon_view.
5231  *
5232  * Returns: the pixbuf column, or -1 if it's unset.
5233  *
5234  * Since: 2.6
5235  */
5236 gint
5237 gtk_icon_view_get_pixbuf_column (GtkIconView  *icon_view)
5238 {
5239   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5240
5241   return icon_view->priv->pixbuf_column;
5242 }
5243
5244 /**
5245  * gtk_icon_view_select_path:
5246  * @icon_view: A #GtkIconView.
5247  * @path: The #GtkTreePath to be selected.
5248  *
5249  * Selects the row at @path.
5250  *
5251  * Since: 2.6
5252  **/
5253 void
5254 gtk_icon_view_select_path (GtkIconView *icon_view,
5255                            GtkTreePath *path)
5256 {
5257   GtkIconViewItem *item = NULL;
5258
5259   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5260   g_return_if_fail (icon_view->priv->model != NULL);
5261   g_return_if_fail (path != NULL);
5262
5263   if (gtk_tree_path_get_depth (path) > 0)
5264     item = g_list_nth_data (icon_view->priv->items,
5265                             gtk_tree_path_get_indices(path)[0]);
5266
5267   if (item)
5268     _gtk_icon_view_select_item (icon_view, item);
5269 }
5270
5271 /**
5272  * gtk_icon_view_unselect_path:
5273  * @icon_view: A #GtkIconView.
5274  * @path: The #GtkTreePath to be unselected.
5275  *
5276  * Unselects the row at @path.
5277  *
5278  * Since: 2.6
5279  **/
5280 void
5281 gtk_icon_view_unselect_path (GtkIconView *icon_view,
5282                              GtkTreePath *path)
5283 {
5284   GtkIconViewItem *item;
5285
5286   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5287   g_return_if_fail (icon_view->priv->model != NULL);
5288   g_return_if_fail (path != NULL);
5289
5290   item = g_list_nth_data (icon_view->priv->items,
5291                           gtk_tree_path_get_indices(path)[0]);
5292
5293   if (!item)
5294     return;
5295
5296   _gtk_icon_view_unselect_item (icon_view, item);
5297 }
5298
5299 /**
5300  * gtk_icon_view_get_selected_items:
5301  * @icon_view: A #GtkIconView.
5302  *
5303  * Creates a list of paths of all selected items. Additionally, if you are
5304  * planning on modifying the model after calling this function, you may
5305  * want to convert the returned list into a list of #GtkTreeRowReference<!-- -->s.
5306  * To do this, you can use gtk_tree_row_reference_new().
5307  *
5308  * To free the return value, use:
5309  * |[
5310  * g_list_free_full (list, (GDestroyNotify) gtk_tree_patch_free);
5311  * ]|
5312  *
5313  * Return value: (element-type GtkTreePath) (transfer full): A #GList containing a #GtkTreePath for each selected row.
5314  *
5315  * Since: 2.6
5316  **/
5317 GList *
5318 gtk_icon_view_get_selected_items (GtkIconView *icon_view)
5319 {
5320   GList *list;
5321   GList *selected = NULL;
5322
5323   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), NULL);
5324
5325   for (list = icon_view->priv->items; list != NULL; list = list->next)
5326     {
5327       GtkIconViewItem *item = list->data;
5328
5329       if (item->selected)
5330         {
5331           GtkTreePath *path = gtk_tree_path_new_from_indices (item->index, -1);
5332
5333           selected = g_list_prepend (selected, path);
5334         }
5335     }
5336
5337   return selected;
5338 }
5339
5340 /**
5341  * gtk_icon_view_select_all:
5342  * @icon_view: A #GtkIconView.
5343  *
5344  * Selects all the icons. @icon_view must has its selection mode set
5345  * to #GTK_SELECTION_MULTIPLE.
5346  *
5347  * Since: 2.6
5348  **/
5349 void
5350 gtk_icon_view_select_all (GtkIconView *icon_view)
5351 {
5352   GList *items;
5353   gboolean dirty = FALSE;
5354
5355   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5356
5357   if (icon_view->priv->selection_mode != GTK_SELECTION_MULTIPLE)
5358     return;
5359
5360   for (items = icon_view->priv->items; items; items = items->next)
5361     {
5362       GtkIconViewItem *item = items->data;
5363
5364       if (!item->selected)
5365         {
5366           dirty = TRUE;
5367           item->selected = TRUE;
5368           gtk_icon_view_queue_draw_item (icon_view, item);
5369         }
5370     }
5371
5372   if (dirty)
5373     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
5374 }
5375
5376 /**
5377  * gtk_icon_view_unselect_all:
5378  * @icon_view: A #GtkIconView.
5379  *
5380  * Unselects all the icons.
5381  *
5382  * Since: 2.6
5383  **/
5384 void
5385 gtk_icon_view_unselect_all (GtkIconView *icon_view)
5386 {
5387   gboolean dirty = FALSE;
5388
5389   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5390
5391   if (icon_view->priv->selection_mode == GTK_SELECTION_BROWSE)
5392     return;
5393
5394   dirty = gtk_icon_view_unselect_all_internal (icon_view);
5395
5396   if (dirty)
5397     g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
5398 }
5399
5400 /**
5401  * gtk_icon_view_path_is_selected:
5402  * @icon_view: A #GtkIconView.
5403  * @path: A #GtkTreePath to check selection on.
5404  *
5405  * Returns %TRUE if the icon pointed to by @path is currently
5406  * selected. If @path does not point to a valid location, %FALSE is returned.
5407  *
5408  * Return value: %TRUE if @path is selected.
5409  *
5410  * Since: 2.6
5411  **/
5412 gboolean
5413 gtk_icon_view_path_is_selected (GtkIconView *icon_view,
5414                                 GtkTreePath *path)
5415 {
5416   GtkIconViewItem *item;
5417
5418   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
5419   g_return_val_if_fail (icon_view->priv->model != NULL, FALSE);
5420   g_return_val_if_fail (path != NULL, FALSE);
5421
5422   item = g_list_nth_data (icon_view->priv->items,
5423                           gtk_tree_path_get_indices(path)[0]);
5424
5425   if (!item)
5426     return FALSE;
5427
5428   return item->selected;
5429 }
5430
5431 /**
5432  * gtk_icon_view_get_item_row:
5433  * @icon_view: a #GtkIconView
5434  * @path: the #GtkTreePath of the item
5435  *
5436  * Gets the row in which the item @path is currently
5437  * displayed. Row numbers start at 0.
5438  *
5439  * Returns: The row in which the item is displayed
5440  *
5441  * Since: 2.22
5442  */
5443 gint
5444 gtk_icon_view_get_item_row (GtkIconView *icon_view,
5445                             GtkTreePath *path)
5446 {
5447   GtkIconViewItem *item;
5448
5449   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5450   g_return_val_if_fail (icon_view->priv->model != NULL, -1);
5451   g_return_val_if_fail (path != NULL, -1);
5452
5453   item = g_list_nth_data (icon_view->priv->items,
5454                           gtk_tree_path_get_indices(path)[0]);
5455
5456   if (!item)
5457     return -1;
5458
5459   return item->row;
5460 }
5461
5462 /**
5463  * gtk_icon_view_get_item_column:
5464  * @icon_view: a #GtkIconView
5465  * @path: the #GtkTreePath of the item
5466  *
5467  * Gets the column in which the item @path is currently
5468  * displayed. Column numbers start at 0.
5469  *
5470  * Returns: The column in which the item is displayed
5471  *
5472  * Since: 2.22
5473  */
5474 gint
5475 gtk_icon_view_get_item_column (GtkIconView *icon_view,
5476                                GtkTreePath *path)
5477 {
5478   GtkIconViewItem *item;
5479
5480   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5481   g_return_val_if_fail (icon_view->priv->model != NULL, -1);
5482   g_return_val_if_fail (path != NULL, -1);
5483
5484   item = g_list_nth_data (icon_view->priv->items,
5485                           gtk_tree_path_get_indices(path)[0]);
5486
5487   if (!item)
5488     return -1;
5489
5490   return item->col;
5491 }
5492
5493 /**
5494  * gtk_icon_view_item_activated:
5495  * @icon_view: A #GtkIconView
5496  * @path: The #GtkTreePath to be activated
5497  *
5498  * Activates the item determined by @path.
5499  *
5500  * Since: 2.6
5501  **/
5502 void
5503 gtk_icon_view_item_activated (GtkIconView      *icon_view,
5504                               GtkTreePath      *path)
5505 {
5506   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5507   g_return_if_fail (path != NULL);
5508
5509   g_signal_emit (icon_view, icon_view_signals[ITEM_ACTIVATED], 0, path);
5510 }
5511
5512 /**
5513  * gtk_icon_view_set_item_orientation:
5514  * @icon_view: a #GtkIconView
5515  * @orientation: the relative position of texts and icons
5516  *
5517  * Sets the ::item-orientation property which determines whether the labels
5518  * are drawn beside the icons instead of below.
5519  *
5520  * Since: 2.6
5521  **/
5522 void
5523 gtk_icon_view_set_item_orientation (GtkIconView    *icon_view,
5524                                     GtkOrientation  orientation)
5525 {
5526   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5527
5528   if (icon_view->priv->item_orientation != orientation)
5529     {
5530       icon_view->priv->item_orientation = orientation;
5531
5532       if (icon_view->priv->cell_area)
5533         {
5534           if (GTK_IS_ORIENTABLE (icon_view->priv->cell_area))
5535             gtk_orientable_set_orientation (GTK_ORIENTABLE (icon_view->priv->cell_area),
5536                                             icon_view->priv->item_orientation);
5537
5538           gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5539         }
5540
5541       gtk_icon_view_invalidate_sizes (icon_view);
5542
5543       update_text_cell (icon_view);
5544       update_pixbuf_cell (icon_view);
5545
5546       g_object_notify (G_OBJECT (icon_view), "item-orientation");
5547     }
5548 }
5549
5550 /**
5551  * gtk_icon_view_get_item_orientation:
5552  * @icon_view: a #GtkIconView
5553  *
5554  * Returns the value of the ::item-orientation property which determines
5555  * whether the labels are drawn beside the icons instead of below.
5556  *
5557  * Return value: the relative position of texts and icons
5558  *
5559  * Since: 2.6
5560  **/
5561 GtkOrientation
5562 gtk_icon_view_get_item_orientation (GtkIconView *icon_view)
5563 {
5564   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view),
5565                         GTK_ORIENTATION_VERTICAL);
5566
5567   return icon_view->priv->item_orientation;
5568 }
5569
5570 /**
5571  * gtk_icon_view_set_columns:
5572  * @icon_view: a #GtkIconView
5573  * @columns: the number of columns
5574  *
5575  * Sets the ::columns property which determines in how
5576  * many columns the icons are arranged. If @columns is
5577  * -1, the number of columns will be chosen automatically
5578  * to fill the available area.
5579  *
5580  * Since: 2.6
5581  */
5582 void
5583 gtk_icon_view_set_columns (GtkIconView *icon_view,
5584                            gint         columns)
5585 {
5586   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5587
5588   if (icon_view->priv->columns != columns)
5589     {
5590       icon_view->priv->columns = columns;
5591
5592       if (icon_view->priv->cell_area)
5593         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5594
5595       gtk_widget_queue_resize (GTK_WIDGET (icon_view));
5596
5597       g_object_notify (G_OBJECT (icon_view), "columns");
5598     }
5599 }
5600
5601 /**
5602  * gtk_icon_view_get_columns:
5603  * @icon_view: a #GtkIconView
5604  *
5605  * Returns the value of the ::columns property.
5606  *
5607  * Return value: the number of columns, or -1
5608  *
5609  * Since: 2.6
5610  */
5611 gint
5612 gtk_icon_view_get_columns (GtkIconView *icon_view)
5613 {
5614   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5615
5616   return icon_view->priv->columns;
5617 }
5618
5619 /**
5620  * gtk_icon_view_set_item_width:
5621  * @icon_view: a #GtkIconView
5622  * @item_width: the width for each item
5623  *
5624  * Sets the ::item-width property which specifies the width
5625  * to use for each item. If it is set to -1, the icon view will
5626  * automatically determine a suitable item size.
5627  *
5628  * Since: 2.6
5629  */
5630 void
5631 gtk_icon_view_set_item_width (GtkIconView *icon_view,
5632                               gint         item_width)
5633 {
5634   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5635
5636   if (icon_view->priv->item_width != item_width)
5637     {
5638       icon_view->priv->item_width = item_width;
5639
5640       if (icon_view->priv->cell_area)
5641         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5642
5643       gtk_icon_view_invalidate_sizes (icon_view);
5644
5645       update_text_cell (icon_view);
5646
5647       g_object_notify (G_OBJECT (icon_view), "item-width");
5648     }
5649 }
5650
5651 /**
5652  * gtk_icon_view_get_item_width:
5653  * @icon_view: a #GtkIconView
5654  *
5655  * Returns the value of the ::item-width property.
5656  *
5657  * Return value: the width of a single item, or -1
5658  *
5659  * Since: 2.6
5660  */
5661 gint
5662 gtk_icon_view_get_item_width (GtkIconView *icon_view)
5663 {
5664   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5665
5666   return icon_view->priv->item_width;
5667 }
5668
5669
5670 /**
5671  * gtk_icon_view_set_spacing:
5672  * @icon_view: a #GtkIconView
5673  * @spacing: the spacing
5674  *
5675  * Sets the ::spacing property which specifies the space
5676  * which is inserted between the cells (i.e. the icon and
5677  * the text) of an item.
5678  *
5679  * Since: 2.6
5680  */
5681 void
5682 gtk_icon_view_set_spacing (GtkIconView *icon_view,
5683                            gint         spacing)
5684 {
5685   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5686
5687   if (icon_view->priv->spacing != spacing)
5688     {
5689       icon_view->priv->spacing = spacing;
5690
5691       if (icon_view->priv->cell_area)
5692         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5693
5694       gtk_icon_view_invalidate_sizes (icon_view);
5695
5696       g_object_notify (G_OBJECT (icon_view), "spacing");
5697     }
5698 }
5699
5700 /**
5701  * gtk_icon_view_get_spacing:
5702  * @icon_view: a #GtkIconView
5703  *
5704  * Returns the value of the ::spacing property.
5705  *
5706  * Return value: the space between cells
5707  *
5708  * Since: 2.6
5709  */
5710 gint
5711 gtk_icon_view_get_spacing (GtkIconView *icon_view)
5712 {
5713   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5714
5715   return icon_view->priv->spacing;
5716 }
5717
5718 /**
5719  * gtk_icon_view_set_row_spacing:
5720  * @icon_view: a #GtkIconView
5721  * @row_spacing: the row spacing
5722  *
5723  * Sets the ::row-spacing property which specifies the space
5724  * which is inserted between the rows of the icon view.
5725  *
5726  * Since: 2.6
5727  */
5728 void
5729 gtk_icon_view_set_row_spacing (GtkIconView *icon_view,
5730                                gint         row_spacing)
5731 {
5732   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5733
5734   if (icon_view->priv->row_spacing != row_spacing)
5735     {
5736       icon_view->priv->row_spacing = row_spacing;
5737
5738       if (icon_view->priv->cell_area)
5739         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5740
5741       gtk_icon_view_invalidate_sizes (icon_view);
5742
5743       g_object_notify (G_OBJECT (icon_view), "row-spacing");
5744     }
5745 }
5746
5747 /**
5748  * gtk_icon_view_get_row_spacing:
5749  * @icon_view: a #GtkIconView
5750  *
5751  * Returns the value of the ::row-spacing property.
5752  *
5753  * Return value: the space between rows
5754  *
5755  * Since: 2.6
5756  */
5757 gint
5758 gtk_icon_view_get_row_spacing (GtkIconView *icon_view)
5759 {
5760   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5761
5762   return icon_view->priv->row_spacing;
5763 }
5764
5765 /**
5766  * gtk_icon_view_set_column_spacing:
5767  * @icon_view: a #GtkIconView
5768  * @column_spacing: the column spacing
5769  *
5770  * Sets the ::column-spacing property which specifies the space
5771  * which is inserted between the columns of the icon view.
5772  *
5773  * Since: 2.6
5774  */
5775 void
5776 gtk_icon_view_set_column_spacing (GtkIconView *icon_view,
5777                                   gint         column_spacing)
5778 {
5779   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5780
5781   if (icon_view->priv->column_spacing != column_spacing)
5782     {
5783       icon_view->priv->column_spacing = column_spacing;
5784
5785       if (icon_view->priv->cell_area)
5786         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5787
5788       gtk_icon_view_invalidate_sizes (icon_view);
5789
5790       g_object_notify (G_OBJECT (icon_view), "column-spacing");
5791     }
5792 }
5793
5794 /**
5795  * gtk_icon_view_get_column_spacing:
5796  * @icon_view: a #GtkIconView
5797  *
5798  * Returns the value of the ::column-spacing property.
5799  *
5800  * Return value: the space between columns
5801  *
5802  * Since: 2.6
5803  */
5804 gint
5805 gtk_icon_view_get_column_spacing (GtkIconView *icon_view)
5806 {
5807   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5808
5809   return icon_view->priv->column_spacing;
5810 }
5811
5812 /**
5813  * gtk_icon_view_set_margin:
5814  * @icon_view: a #GtkIconView
5815  * @margin: the margin
5816  *
5817  * Sets the ::margin property which specifies the space
5818  * which is inserted at the top, bottom, left and right
5819  * of the icon view.
5820  *
5821  * Since: 2.6
5822  */
5823 void
5824 gtk_icon_view_set_margin (GtkIconView *icon_view,
5825                           gint         margin)
5826 {
5827   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5828
5829   if (icon_view->priv->margin != margin)
5830     {
5831       icon_view->priv->margin = margin;
5832
5833       if (icon_view->priv->cell_area)
5834         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5835
5836       gtk_icon_view_invalidate_sizes (icon_view);
5837
5838       g_object_notify (G_OBJECT (icon_view), "margin");
5839     }
5840 }
5841
5842 /**
5843  * gtk_icon_view_get_margin:
5844  * @icon_view: a #GtkIconView
5845  *
5846  * Returns the value of the ::margin property.
5847  *
5848  * Return value: the space at the borders
5849  *
5850  * Since: 2.6
5851  */
5852 gint
5853 gtk_icon_view_get_margin (GtkIconView *icon_view)
5854 {
5855   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5856
5857   return icon_view->priv->margin;
5858 }
5859
5860 /**
5861  * gtk_icon_view_set_item_padding:
5862  * @icon_view: a #GtkIconView
5863  * @item_padding: the item padding
5864  *
5865  * Sets the #GtkIconView:item-padding property which specifies the padding
5866  * around each of the icon view's items.
5867  *
5868  * Since: 2.18
5869  */
5870 void
5871 gtk_icon_view_set_item_padding (GtkIconView *icon_view,
5872                                 gint         item_padding)
5873 {
5874   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
5875
5876   if (icon_view->priv->item_padding != item_padding)
5877     {
5878       icon_view->priv->item_padding = item_padding;
5879
5880       if (icon_view->priv->cell_area)
5881         gtk_cell_area_stop_editing (icon_view->priv->cell_area, TRUE);
5882
5883       gtk_icon_view_invalidate_sizes (icon_view);
5884
5885       g_object_notify (G_OBJECT (icon_view), "item-padding");
5886     }
5887 }
5888
5889 /**
5890  * gtk_icon_view_get_item_padding:
5891  * @icon_view: a #GtkIconView
5892  *
5893  * Returns the value of the ::item-padding property.
5894  *
5895  * Return value: the padding around items
5896  *
5897  * Since: 2.18
5898  */
5899 gint
5900 gtk_icon_view_get_item_padding (GtkIconView *icon_view)
5901 {
5902   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), -1);
5903
5904   return icon_view->priv->item_padding;
5905 }
5906
5907 /* Get/set whether drag_motion requested the drag data and
5908  * drag_data_received should thus not actually insert the data,
5909  * since the data doesn't result from a drop.
5910  */
5911 static void
5912 set_status_pending (GdkDragContext *context,
5913                     GdkDragAction   suggested_action)
5914 {
5915   g_object_set_data (G_OBJECT (context),
5916                      I_("gtk-icon-view-status-pending"),
5917                      GINT_TO_POINTER (suggested_action));
5918 }
5919
5920 static GdkDragAction
5921 get_status_pending (GdkDragContext *context)
5922 {
5923   return GPOINTER_TO_INT (g_object_get_data (G_OBJECT (context),
5924                                              "gtk-icon-view-status-pending"));
5925 }
5926
5927 static void
5928 unset_reorderable (GtkIconView *icon_view)
5929 {
5930   if (icon_view->priv->reorderable)
5931     {
5932       icon_view->priv->reorderable = FALSE;
5933       g_object_notify (G_OBJECT (icon_view), "reorderable");
5934     }
5935 }
5936
5937 static void
5938 set_source_row (GdkDragContext *context,
5939                 GtkTreeModel   *model,
5940                 GtkTreePath    *source_row)
5941 {
5942   if (source_row)
5943     g_object_set_data_full (G_OBJECT (context),
5944                             I_("gtk-icon-view-source-row"),
5945                             gtk_tree_row_reference_new (model, source_row),
5946                             (GDestroyNotify) gtk_tree_row_reference_free);
5947   else
5948     g_object_set_data_full (G_OBJECT (context),
5949                             I_("gtk-icon-view-source-row"),
5950                             NULL, NULL);
5951 }
5952
5953 static GtkTreePath*
5954 get_source_row (GdkDragContext *context)
5955 {
5956   GtkTreeRowReference *ref;
5957
5958   ref = g_object_get_data (G_OBJECT (context), "gtk-icon-view-source-row");
5959
5960   if (ref)
5961     return gtk_tree_row_reference_get_path (ref);
5962   else
5963     return NULL;
5964 }
5965
5966 typedef struct
5967 {
5968   GtkTreeRowReference *dest_row;
5969   gboolean             empty_view_drop;
5970   gboolean             drop_append_mode;
5971 } DestRow;
5972
5973 static void
5974 dest_row_free (gpointer data)
5975 {
5976   DestRow *dr = (DestRow *)data;
5977
5978   gtk_tree_row_reference_free (dr->dest_row);
5979   g_free (dr);
5980 }
5981
5982 static void
5983 set_dest_row (GdkDragContext *context,
5984               GtkTreeModel   *model,
5985               GtkTreePath    *dest_row,
5986               gboolean        empty_view_drop,
5987               gboolean        drop_append_mode)
5988 {
5989   DestRow *dr;
5990
5991   if (!dest_row)
5992     {
5993       g_object_set_data_full (G_OBJECT (context),
5994                               I_("gtk-icon-view-dest-row"),
5995                               NULL, NULL);
5996       return;
5997     }
5998
5999   dr = g_new0 (DestRow, 1);
6000
6001   dr->dest_row = gtk_tree_row_reference_new (model, dest_row);
6002   dr->empty_view_drop = empty_view_drop;
6003   dr->drop_append_mode = drop_append_mode;
6004   g_object_set_data_full (G_OBJECT (context),
6005                           I_("gtk-icon-view-dest-row"),
6006                           dr, (GDestroyNotify) dest_row_free);
6007 }
6008
6009 static GtkTreePath*
6010 get_dest_row (GdkDragContext *context)
6011 {
6012   DestRow *dr;
6013
6014   dr = g_object_get_data (G_OBJECT (context), "gtk-icon-view-dest-row");
6015
6016   if (dr)
6017     {
6018       GtkTreePath *path = NULL;
6019
6020       if (dr->dest_row)
6021         path = gtk_tree_row_reference_get_path (dr->dest_row);
6022       else if (dr->empty_view_drop)
6023         path = gtk_tree_path_new_from_indices (0, -1);
6024       else
6025         path = NULL;
6026
6027       if (path && dr->drop_append_mode)
6028         gtk_tree_path_next (path);
6029
6030       return path;
6031     }
6032   else
6033     return NULL;
6034 }
6035
6036 static gboolean
6037 check_model_dnd (GtkTreeModel *model,
6038                  GType         required_iface,
6039                  const gchar  *signal)
6040 {
6041   if (model == NULL || !G_TYPE_CHECK_INSTANCE_TYPE ((model), required_iface))
6042     {
6043       g_warning ("You must override the default '%s' handler "
6044                  "on GtkIconView when using models that don't support "
6045                  "the %s interface and enabling drag-and-drop. The simplest way to do this "
6046                  "is to connect to '%s' and call "
6047                  "g_signal_stop_emission_by_name() in your signal handler to prevent "
6048                  "the default handler from running. Look at the source code "
6049                  "for the default handler in gtkiconview.c to get an idea what "
6050                  "your handler should do. (gtkiconview.c is in the GTK+ source "
6051                  "code.) If you're using GTK+ from a language other than C, "
6052                  "there may be a more natural way to override default handlers, e.g. via derivation.",
6053                  signal, g_type_name (required_iface), signal);
6054       return FALSE;
6055     }
6056   else
6057     return TRUE;
6058 }
6059
6060 static void
6061 remove_scroll_timeout (GtkIconView *icon_view)
6062 {
6063   if (icon_view->priv->scroll_timeout_id != 0)
6064     {
6065       g_source_remove (icon_view->priv->scroll_timeout_id);
6066
6067       icon_view->priv->scroll_timeout_id = 0;
6068     }
6069 }
6070
6071 static void
6072 gtk_icon_view_autoscroll (GtkIconView *icon_view,
6073                           GdkDevice   *device)
6074 {
6075   GdkWindow *window;
6076   gint px, py, width, height;
6077   gint hoffset, voffset;
6078
6079   window = gtk_widget_get_window (GTK_WIDGET (icon_view));
6080
6081   gdk_window_get_device_position (window, device, &px, &py, NULL);
6082   gdk_window_get_geometry (window, NULL, NULL, &width, &height);
6083
6084   /* see if we are near the edge. */
6085   voffset = py - 2 * SCROLL_EDGE_SIZE;
6086   if (voffset > 0)
6087     voffset = MAX (py - (height - 2 * SCROLL_EDGE_SIZE), 0);
6088
6089   hoffset = px - 2 * SCROLL_EDGE_SIZE;
6090   if (hoffset > 0)
6091     hoffset = MAX (px - (width - 2 * SCROLL_EDGE_SIZE), 0);
6092
6093   if (voffset != 0)
6094     gtk_adjustment_set_value (icon_view->priv->vadjustment,
6095                               gtk_adjustment_get_value (icon_view->priv->vadjustment) + voffset);
6096
6097   if (hoffset != 0)
6098     gtk_adjustment_set_value (icon_view->priv->hadjustment,
6099                               gtk_adjustment_get_value (icon_view->priv->hadjustment) + hoffset);
6100 }
6101
6102 typedef struct {
6103   GtkIconView *icon_view;
6104   GdkDevice   *device;
6105 } DragScrollData;
6106
6107 static gboolean
6108 drag_scroll_timeout (gpointer datap)
6109 {
6110   DragScrollData *data = datap;
6111
6112   gtk_icon_view_autoscroll (data->icon_view, data->device);
6113
6114   return TRUE;
6115 }
6116
6117 static void
6118 drag_scroll_data_free (DragScrollData *data)
6119 {
6120   g_slice_free (DragScrollData, data);
6121 }
6122
6123 static gboolean
6124 set_destination (GtkIconView    *icon_view,
6125                  GdkDragContext *context,
6126                  gint            x,
6127                  gint            y,
6128                  GdkDragAction  *suggested_action,
6129                  GdkAtom        *target)
6130 {
6131   GtkWidget *widget;
6132   GtkTreePath *path = NULL;
6133   GtkIconViewDropPosition pos;
6134   GtkIconViewDropPosition old_pos;
6135   GtkTreePath *old_dest_path = NULL;
6136   gboolean can_drop = FALSE;
6137
6138   widget = GTK_WIDGET (icon_view);
6139
6140   *suggested_action = 0;
6141   *target = GDK_NONE;
6142
6143   if (!icon_view->priv->dest_set)
6144     {
6145       /* someone unset us as a drag dest, note that if
6146        * we return FALSE drag_leave isn't called
6147        */
6148
6149       gtk_icon_view_set_drag_dest_item (icon_view,
6150                                         NULL,
6151                                         GTK_ICON_VIEW_DROP_LEFT);
6152
6153       remove_scroll_timeout (GTK_ICON_VIEW (widget));
6154
6155       return FALSE; /* no longer a drop site */
6156     }
6157
6158   *target = gtk_drag_dest_find_target (widget, context,
6159                                        gtk_drag_dest_get_target_list (widget));
6160   if (*target == GDK_NONE)
6161     return FALSE;
6162
6163   if (!gtk_icon_view_get_dest_item_at_pos (icon_view, x, y, &path, &pos))
6164     {
6165       gint n_children;
6166       GtkTreeModel *model;
6167
6168       /* the row got dropped on empty space, let's setup a special case
6169        */
6170
6171       if (path)
6172         gtk_tree_path_free (path);
6173
6174       model = gtk_icon_view_get_model (icon_view);
6175
6176       n_children = gtk_tree_model_iter_n_children (model, NULL);
6177       if (n_children)
6178         {
6179           pos = GTK_ICON_VIEW_DROP_BELOW;
6180           path = gtk_tree_path_new_from_indices (n_children - 1, -1);
6181         }
6182       else
6183         {
6184           pos = GTK_ICON_VIEW_DROP_ABOVE;
6185           path = gtk_tree_path_new_from_indices (0, -1);
6186         }
6187
6188       can_drop = TRUE;
6189
6190       goto out;
6191     }
6192
6193   g_assert (path);
6194
6195   gtk_icon_view_get_drag_dest_item (icon_view,
6196                                     &old_dest_path,
6197                                     &old_pos);
6198
6199   if (old_dest_path)
6200     gtk_tree_path_free (old_dest_path);
6201
6202   if (TRUE /* FIXME if the location droppable predicate */)
6203     {
6204       can_drop = TRUE;
6205     }
6206
6207 out:
6208   if (can_drop)
6209     {
6210       GtkWidget *source_widget;
6211
6212       *suggested_action = gdk_drag_context_get_suggested_action (context);
6213       source_widget = gtk_drag_get_source_widget (context);
6214
6215       if (source_widget == widget)
6216         {
6217           /* Default to MOVE, unless the user has
6218            * pressed ctrl or shift to affect available actions
6219            */
6220           if ((gdk_drag_context_get_actions (context) & GDK_ACTION_MOVE) != 0)
6221             *suggested_action = GDK_ACTION_MOVE;
6222         }
6223
6224       gtk_icon_view_set_drag_dest_item (GTK_ICON_VIEW (widget),
6225                                         path, pos);
6226     }
6227   else
6228     {
6229       /* can't drop here */
6230       gtk_icon_view_set_drag_dest_item (GTK_ICON_VIEW (widget),
6231                                         NULL,
6232                                         GTK_ICON_VIEW_DROP_LEFT);
6233     }
6234
6235   if (path)
6236     gtk_tree_path_free (path);
6237
6238   return TRUE;
6239 }
6240
6241 static GtkTreePath*
6242 get_logical_destination (GtkIconView *icon_view,
6243                          gboolean    *drop_append_mode)
6244 {
6245   /* adjust path to point to the row the drop goes in front of */
6246   GtkTreePath *path = NULL;
6247   GtkIconViewDropPosition pos;
6248
6249   *drop_append_mode = FALSE;
6250
6251   gtk_icon_view_get_drag_dest_item (icon_view, &path, &pos);
6252
6253   if (path == NULL)
6254     return NULL;
6255
6256   if (pos == GTK_ICON_VIEW_DROP_RIGHT ||
6257       pos == GTK_ICON_VIEW_DROP_BELOW)
6258     {
6259       GtkTreeIter iter;
6260       GtkTreeModel *model = icon_view->priv->model;
6261
6262       if (!gtk_tree_model_get_iter (model, &iter, path) ||
6263           !gtk_tree_model_iter_next (model, &iter))
6264         *drop_append_mode = TRUE;
6265       else
6266         {
6267           *drop_append_mode = FALSE;
6268           gtk_tree_path_next (path);
6269         }
6270     }
6271
6272   return path;
6273 }
6274
6275 static gboolean
6276 gtk_icon_view_maybe_begin_drag (GtkIconView    *icon_view,
6277                                 GdkEventMotion *event)
6278 {
6279   GtkWidget *widget = GTK_WIDGET (icon_view);
6280   GdkDragContext *context;
6281   GtkTreePath *path = NULL;
6282   gint button;
6283   GtkTreeModel *model;
6284   gboolean retval = FALSE;
6285
6286   if (!icon_view->priv->source_set)
6287     goto out;
6288
6289   if (icon_view->priv->pressed_button < 0)
6290     goto out;
6291
6292   if (!gtk_drag_check_threshold (GTK_WIDGET (icon_view),
6293                                  icon_view->priv->press_start_x,
6294                                  icon_view->priv->press_start_y,
6295                                  event->x, event->y))
6296     goto out;
6297
6298   model = gtk_icon_view_get_model (icon_view);
6299
6300   if (model == NULL)
6301     goto out;
6302
6303   button = icon_view->priv->pressed_button;
6304   icon_view->priv->pressed_button = -1;
6305
6306   path = gtk_icon_view_get_path_at_pos (icon_view,
6307                                         icon_view->priv->press_start_x,
6308                                         icon_view->priv->press_start_y);
6309
6310   if (path == NULL)
6311     goto out;
6312
6313   if (!GTK_IS_TREE_DRAG_SOURCE (model) ||
6314       !gtk_tree_drag_source_row_draggable (GTK_TREE_DRAG_SOURCE (model),
6315                                            path))
6316     goto out;
6317
6318   /* FIXME Check whether we're a start button, if not return FALSE and
6319    * free path
6320    */
6321
6322   /* Now we can begin the drag */
6323
6324   retval = TRUE;
6325
6326   context = gtk_drag_begin (widget,
6327                             gtk_drag_source_get_target_list (widget),
6328                             icon_view->priv->source_actions,
6329                             button,
6330                             (GdkEvent*)event);
6331
6332   set_source_row (context, model, path);
6333
6334  out:
6335   if (path)
6336     gtk_tree_path_free (path);
6337
6338   return retval;
6339 }
6340
6341 /* Source side drag signals */
6342 static void
6343 gtk_icon_view_drag_begin (GtkWidget      *widget,
6344                           GdkDragContext *context)
6345 {
6346   GtkIconView *icon_view;
6347   GtkIconViewItem *item;
6348   cairo_surface_t *icon;
6349   gint x, y;
6350   GtkTreePath *path;
6351
6352   icon_view = GTK_ICON_VIEW (widget);
6353
6354   /* if the user uses a custom DnD impl, we don't set the icon here */
6355   if (!icon_view->priv->dest_set && !icon_view->priv->source_set)
6356     return;
6357
6358   item = _gtk_icon_view_get_item_at_coords (icon_view,
6359                                            icon_view->priv->press_start_x,
6360                                            icon_view->priv->press_start_y,
6361                                            TRUE,
6362                                            NULL);
6363
6364   g_return_if_fail (item != NULL);
6365
6366   x = icon_view->priv->press_start_x - item->cell_area.x + 1;
6367   y = icon_view->priv->press_start_y - item->cell_area.y + 1;
6368
6369   path = gtk_tree_path_new_from_indices (item->index, -1);
6370   icon = gtk_icon_view_create_drag_icon (icon_view, path);
6371   gtk_tree_path_free (path);
6372
6373   cairo_surface_set_device_offset (icon, -x, -y);
6374
6375   gtk_drag_set_icon_surface (context, icon);
6376
6377   cairo_surface_destroy (icon);
6378 }
6379
6380 static void
6381 gtk_icon_view_drag_end (GtkWidget      *widget,
6382                         GdkDragContext *context)
6383 {
6384   /* do nothing */
6385 }
6386
6387 static void
6388 gtk_icon_view_drag_data_get (GtkWidget        *widget,
6389                              GdkDragContext   *context,
6390                              GtkSelectionData *selection_data,
6391                              guint             info,
6392                              guint             time)
6393 {
6394   GtkIconView *icon_view;
6395   GtkTreeModel *model;
6396   GtkTreePath *source_row;
6397
6398   icon_view = GTK_ICON_VIEW (widget);
6399   model = gtk_icon_view_get_model (icon_view);
6400
6401   if (model == NULL)
6402     return;
6403
6404   if (!icon_view->priv->source_set)
6405     return;
6406
6407   source_row = get_source_row (context);
6408
6409   if (source_row == NULL)
6410     return;
6411
6412   /* We can implement the GTK_TREE_MODEL_ROW target generically for
6413    * any model; for DragSource models there are some other targets
6414    * we also support.
6415    */
6416
6417   if (GTK_IS_TREE_DRAG_SOURCE (model) &&
6418       gtk_tree_drag_source_drag_data_get (GTK_TREE_DRAG_SOURCE (model),
6419                                           source_row,
6420                                           selection_data))
6421     goto done;
6422
6423   /* If drag_data_get does nothing, try providing row data. */
6424   if (gtk_selection_data_get_target (selection_data) == gdk_atom_intern_static_string ("GTK_TREE_MODEL_ROW"))
6425     gtk_tree_set_row_drag_data (selection_data,
6426                                 model,
6427                                 source_row);
6428
6429  done:
6430   gtk_tree_path_free (source_row);
6431 }
6432
6433 static void
6434 gtk_icon_view_drag_data_delete (GtkWidget      *widget,
6435                                 GdkDragContext *context)
6436 {
6437   GtkTreeModel *model;
6438   GtkIconView *icon_view;
6439   GtkTreePath *source_row;
6440
6441   icon_view = GTK_ICON_VIEW (widget);
6442   model = gtk_icon_view_get_model (icon_view);
6443
6444   if (!check_model_dnd (model, GTK_TYPE_TREE_DRAG_SOURCE, "drag-data-delete"))
6445     return;
6446
6447   if (!icon_view->priv->source_set)
6448     return;
6449
6450   source_row = get_source_row (context);
6451
6452   if (source_row == NULL)
6453     return;
6454
6455   gtk_tree_drag_source_drag_data_delete (GTK_TREE_DRAG_SOURCE (model),
6456                                          source_row);
6457
6458   gtk_tree_path_free (source_row);
6459
6460   set_source_row (context, NULL, NULL);
6461 }
6462
6463 /* Target side drag signals */
6464 static void
6465 gtk_icon_view_drag_leave (GtkWidget      *widget,
6466                           GdkDragContext *context,
6467                           guint           time)
6468 {
6469   GtkIconView *icon_view;
6470
6471   icon_view = GTK_ICON_VIEW (widget);
6472
6473   /* unset any highlight row */
6474   gtk_icon_view_set_drag_dest_item (icon_view,
6475                                     NULL,
6476                                     GTK_ICON_VIEW_DROP_LEFT);
6477
6478   remove_scroll_timeout (icon_view);
6479 }
6480
6481 static gboolean
6482 gtk_icon_view_drag_motion (GtkWidget      *widget,
6483                            GdkDragContext *context,
6484                            gint            x,
6485                            gint            y,
6486                            guint           time)
6487 {
6488   GtkTreePath *path = NULL;
6489   GtkIconViewDropPosition pos;
6490   GtkIconView *icon_view;
6491   GdkDragAction suggested_action = 0;
6492   GdkAtom target;
6493   gboolean empty;
6494
6495   icon_view = GTK_ICON_VIEW (widget);
6496
6497   if (!set_destination (icon_view, context, x, y, &suggested_action, &target))
6498     return FALSE;
6499
6500   gtk_icon_view_get_drag_dest_item (icon_view, &path, &pos);
6501
6502   /* we only know this *after* set_desination_row */
6503   empty = icon_view->priv->empty_view_drop;
6504
6505   if (path == NULL && !empty)
6506     {
6507       /* Can't drop here. */
6508       gdk_drag_status (context, 0, time);
6509     }
6510   else
6511     {
6512       if (icon_view->priv->scroll_timeout_id == 0)
6513         {
6514           DragScrollData *data = g_slice_new (DragScrollData);
6515           data->icon_view = icon_view;
6516           data->device = gdk_drag_context_get_device (context);
6517
6518           icon_view->priv->scroll_timeout_id =
6519             gdk_threads_add_timeout_full (G_PRIORITY_DEFAULT, 50, drag_scroll_timeout, data, (GDestroyNotify) drag_scroll_data_free);
6520         }
6521
6522       if (target == gdk_atom_intern_static_string ("GTK_TREE_MODEL_ROW"))
6523         {
6524           /* Request data so we can use the source row when
6525            * determining whether to accept the drop
6526            */
6527           set_status_pending (context, suggested_action);
6528           gtk_drag_get_data (widget, context, target, time);
6529         }
6530       else
6531         {
6532           set_status_pending (context, 0);
6533           gdk_drag_status (context, suggested_action, time);
6534         }
6535     }
6536
6537   if (path)
6538     gtk_tree_path_free (path);
6539
6540   return TRUE;
6541 }
6542
6543 static gboolean
6544 gtk_icon_view_drag_drop (GtkWidget      *widget,
6545                          GdkDragContext *context,
6546                          gint            x,
6547                          gint            y,
6548                          guint           time)
6549 {
6550   GtkIconView *icon_view;
6551   GtkTreePath *path;
6552   GdkDragAction suggested_action = 0;
6553   GdkAtom target = GDK_NONE;
6554   GtkTreeModel *model;
6555   gboolean drop_append_mode;
6556
6557   icon_view = GTK_ICON_VIEW (widget);
6558   model = gtk_icon_view_get_model (icon_view);
6559
6560   remove_scroll_timeout (GTK_ICON_VIEW (widget));
6561
6562   if (!icon_view->priv->dest_set)
6563     return FALSE;
6564
6565   if (!check_model_dnd (model, GTK_TYPE_TREE_DRAG_DEST, "drag-drop"))
6566     return FALSE;
6567
6568   if (!set_destination (icon_view, context, x, y, &suggested_action, &target))
6569     return FALSE;
6570
6571   path = get_logical_destination (icon_view, &drop_append_mode);
6572
6573   if (target != GDK_NONE && path != NULL)
6574     {
6575       /* in case a motion had requested drag data, change things so we
6576        * treat drag data receives as a drop.
6577        */
6578       set_status_pending (context, 0);
6579       set_dest_row (context, model, path,
6580                     icon_view->priv->empty_view_drop, drop_append_mode);
6581     }
6582
6583   if (path)
6584     gtk_tree_path_free (path);
6585
6586   /* Unset this thing */
6587   gtk_icon_view_set_drag_dest_item (icon_view, NULL, GTK_ICON_VIEW_DROP_LEFT);
6588
6589   if (target != GDK_NONE)
6590     {
6591       gtk_drag_get_data (widget, context, target, time);
6592       return TRUE;
6593     }
6594   else
6595     return FALSE;
6596 }
6597
6598 static void
6599 gtk_icon_view_drag_data_received (GtkWidget        *widget,
6600                                   GdkDragContext   *context,
6601                                   gint              x,
6602                                   gint              y,
6603                                   GtkSelectionData *selection_data,
6604                                   guint             info,
6605                                   guint             time)
6606 {
6607   GtkTreePath *path;
6608   gboolean accepted = FALSE;
6609   GtkTreeModel *model;
6610   GtkIconView *icon_view;
6611   GtkTreePath *dest_row;
6612   GdkDragAction suggested_action;
6613   gboolean drop_append_mode;
6614
6615   icon_view = GTK_ICON_VIEW (widget);
6616   model = gtk_icon_view_get_model (icon_view);
6617
6618   if (!check_model_dnd (model, GTK_TYPE_TREE_DRAG_DEST, "drag-data-received"))
6619     return;
6620
6621   if (!icon_view->priv->dest_set)
6622     return;
6623
6624   suggested_action = get_status_pending (context);
6625
6626   if (suggested_action)
6627     {
6628       /* We are getting this data due to a request in drag_motion,
6629        * rather than due to a request in drag_drop, so we are just
6630        * supposed to call drag_status, not actually paste in the
6631        * data.
6632        */
6633       path = get_logical_destination (icon_view, &drop_append_mode);
6634
6635       if (path == NULL)
6636         suggested_action = 0;
6637
6638       if (suggested_action)
6639         {
6640           if (!gtk_tree_drag_dest_row_drop_possible (GTK_TREE_DRAG_DEST (model),
6641                                                      path,
6642                                                      selection_data))
6643             suggested_action = 0;
6644         }
6645
6646       gdk_drag_status (context, suggested_action, time);
6647
6648       if (path)
6649         gtk_tree_path_free (path);
6650
6651       /* If you can't drop, remove user drop indicator until the next motion */
6652       if (suggested_action == 0)
6653         gtk_icon_view_set_drag_dest_item (icon_view,
6654                                           NULL,
6655                                           GTK_ICON_VIEW_DROP_LEFT);
6656       return;
6657     }
6658
6659
6660   dest_row = get_dest_row (context);
6661
6662   if (dest_row == NULL)
6663     return;
6664
6665   if (gtk_selection_data_get_length (selection_data) >= 0)
6666     {
6667       if (gtk_tree_drag_dest_drag_data_received (GTK_TREE_DRAG_DEST (model),
6668                                                  dest_row,
6669                                                  selection_data))
6670         accepted = TRUE;
6671     }
6672
6673   gtk_drag_finish (context,
6674                    accepted,
6675                    (gdk_drag_context_get_selected_action (context) == GDK_ACTION_MOVE),
6676                    time);
6677
6678   gtk_tree_path_free (dest_row);
6679
6680   /* drop dest_row */
6681   set_dest_row (context, NULL, NULL, FALSE, FALSE);
6682 }
6683
6684 /* Drag-and-Drop support */
6685 /**
6686  * gtk_icon_view_enable_model_drag_source:
6687  * @icon_view: a #GtkIconTreeView
6688  * @start_button_mask: Mask of allowed buttons to start drag
6689  * @targets: (array length=n_targets): the table of targets that the drag will
6690  *           support
6691  * @n_targets: the number of items in @targets
6692  * @actions: the bitmask of possible actions for a drag from this
6693  *    widget
6694  *
6695  * Turns @icon_view into a drag source for automatic DND. Calling this
6696  * method sets #GtkIconView:reorderable to %FALSE.
6697  *
6698  * Since: 2.8
6699  **/
6700 void
6701 gtk_icon_view_enable_model_drag_source (GtkIconView              *icon_view,
6702                                         GdkModifierType           start_button_mask,
6703                                         const GtkTargetEntry     *targets,
6704                                         gint                      n_targets,
6705                                         GdkDragAction             actions)
6706 {
6707   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
6708
6709   gtk_drag_source_set (GTK_WIDGET (icon_view), 0, targets, n_targets, actions);
6710
6711   icon_view->priv->start_button_mask = start_button_mask;
6712   icon_view->priv->source_actions = actions;
6713
6714   icon_view->priv->source_set = TRUE;
6715
6716   unset_reorderable (icon_view);
6717 }
6718
6719 /**
6720  * gtk_icon_view_enable_model_drag_dest:
6721  * @icon_view: a #GtkIconView
6722  * @targets: (array length=n_targets): the table of targets that the drag will
6723  *           support
6724  * @n_targets: the number of items in @targets
6725  * @actions: the bitmask of possible actions for a drag to this
6726  *    widget
6727  *
6728  * Turns @icon_view into a drop destination for automatic DND. Calling this
6729  * method sets #GtkIconView:reorderable to %FALSE.
6730  *
6731  * Since: 2.8
6732  **/
6733 void
6734 gtk_icon_view_enable_model_drag_dest (GtkIconView          *icon_view,
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_dest_set (GTK_WIDGET (icon_view), 0, targets, n_targets, actions);
6742
6743   icon_view->priv->dest_actions = actions;
6744
6745   icon_view->priv->dest_set = TRUE;
6746
6747   unset_reorderable (icon_view);
6748 }
6749
6750 /**
6751  * gtk_icon_view_unset_model_drag_source:
6752  * @icon_view: a #GtkIconView
6753  *
6754  * Undoes the effect of gtk_icon_view_enable_model_drag_source(). Calling this
6755  * method sets #GtkIconView:reorderable to %FALSE.
6756  *
6757  * Since: 2.8
6758  **/
6759 void
6760 gtk_icon_view_unset_model_drag_source (GtkIconView *icon_view)
6761 {
6762   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
6763
6764   if (icon_view->priv->source_set)
6765     {
6766       gtk_drag_source_unset (GTK_WIDGET (icon_view));
6767       icon_view->priv->source_set = FALSE;
6768     }
6769
6770   unset_reorderable (icon_view);
6771 }
6772
6773 /**
6774  * gtk_icon_view_unset_model_drag_dest:
6775  * @icon_view: a #GtkIconView
6776  *
6777  * Undoes the effect of gtk_icon_view_enable_model_drag_dest(). Calling this
6778  * method sets #GtkIconView:reorderable to %FALSE.
6779  *
6780  * Since: 2.8
6781  **/
6782 void
6783 gtk_icon_view_unset_model_drag_dest (GtkIconView *icon_view)
6784 {
6785   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
6786
6787   if (icon_view->priv->dest_set)
6788     {
6789       gtk_drag_dest_unset (GTK_WIDGET (icon_view));
6790       icon_view->priv->dest_set = FALSE;
6791     }
6792
6793   unset_reorderable (icon_view);
6794 }
6795
6796 /* These are useful to implement your own custom stuff. */
6797 /**
6798  * gtk_icon_view_set_drag_dest_item:
6799  * @icon_view: a #GtkIconView
6800  * @path: (allow-none): The path of the item to highlight, or %NULL.
6801  * @pos: Specifies where to drop, relative to the item
6802  *
6803  * Sets the item that is highlighted for feedback.
6804  *
6805  * Since: 2.8
6806  */
6807 void
6808 gtk_icon_view_set_drag_dest_item (GtkIconView              *icon_view,
6809                                   GtkTreePath              *path,
6810                                   GtkIconViewDropPosition   pos)
6811 {
6812   /* Note; this function is exported to allow a custom DND
6813    * implementation, so it can't touch TreeViewDragInfo
6814    */
6815
6816   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
6817
6818   if (icon_view->priv->dest_item)
6819     {
6820       GtkTreePath *current_path;
6821       current_path = gtk_tree_row_reference_get_path (icon_view->priv->dest_item);
6822       gtk_tree_row_reference_free (icon_view->priv->dest_item);
6823       icon_view->priv->dest_item = NULL;
6824
6825       gtk_icon_view_queue_draw_path (icon_view, current_path);
6826       gtk_tree_path_free (current_path);
6827     }
6828
6829   /* special case a drop on an empty model */
6830   icon_view->priv->empty_view_drop = FALSE;
6831   if (pos == GTK_ICON_VIEW_DROP_ABOVE && path
6832       && gtk_tree_path_get_depth (path) == 1
6833       && gtk_tree_path_get_indices (path)[0] == 0)
6834     {
6835       gint n_children;
6836
6837       n_children = gtk_tree_model_iter_n_children (icon_view->priv->model,
6838                                                    NULL);
6839
6840       if (n_children == 0)
6841         icon_view->priv->empty_view_drop = TRUE;
6842     }
6843
6844   icon_view->priv->dest_pos = pos;
6845
6846   if (path)
6847     {
6848       icon_view->priv->dest_item =
6849         gtk_tree_row_reference_new_proxy (G_OBJECT (icon_view),
6850                                           icon_view->priv->model, path);
6851
6852       gtk_icon_view_queue_draw_path (icon_view, path);
6853     }
6854 }
6855
6856 /**
6857  * gtk_icon_view_get_drag_dest_item:
6858  * @icon_view: a #GtkIconView
6859  * @path: (out) (allow-none): Return location for the path of
6860  *        the highlighted item, or %NULL.
6861  * @pos: (out) (allow-none): Return location for the drop position, or %NULL
6862  *
6863  * Gets information about the item that is highlighted for feedback.
6864  *
6865  * Since: 2.8
6866  **/
6867 void
6868 gtk_icon_view_get_drag_dest_item (GtkIconView              *icon_view,
6869                                   GtkTreePath             **path,
6870                                   GtkIconViewDropPosition  *pos)
6871 {
6872   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
6873
6874   if (path)
6875     {
6876       if (icon_view->priv->dest_item)
6877         *path = gtk_tree_row_reference_get_path (icon_view->priv->dest_item);
6878       else
6879         *path = NULL;
6880     }
6881
6882   if (pos)
6883     *pos = icon_view->priv->dest_pos;
6884 }
6885
6886 /**
6887  * gtk_icon_view_get_dest_item_at_pos:
6888  * @icon_view: a #GtkIconView
6889  * @drag_x: the position to determine the destination item for
6890  * @drag_y: the position to determine the destination item for
6891  * @path: (out) (allow-none): Return location for the path of the item,
6892  *    or %NULL.
6893  * @pos: (out) (allow-none): Return location for the drop position, or %NULL
6894  *
6895  * Determines the destination item for a given position.
6896  *
6897  * Return value: whether there is an item at the given position.
6898  *
6899  * Since: 2.8
6900  **/
6901 gboolean
6902 gtk_icon_view_get_dest_item_at_pos (GtkIconView              *icon_view,
6903                                     gint                      drag_x,
6904                                     gint                      drag_y,
6905                                     GtkTreePath             **path,
6906                                     GtkIconViewDropPosition  *pos)
6907 {
6908   GtkIconViewItem *item;
6909
6910   /* Note; this function is exported to allow a custom DND
6911    * implementation, so it can't touch TreeViewDragInfo
6912    */
6913
6914   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
6915   g_return_val_if_fail (drag_x >= 0, FALSE);
6916   g_return_val_if_fail (drag_y >= 0, FALSE);
6917   g_return_val_if_fail (icon_view->priv->bin_window != NULL, FALSE);
6918
6919
6920   if (path)
6921     *path = NULL;
6922
6923   item = _gtk_icon_view_get_item_at_coords (icon_view,
6924                                            drag_x + gtk_adjustment_get_value (icon_view->priv->hadjustment),
6925                                            drag_y + gtk_adjustment_get_value (icon_view->priv->vadjustment),
6926                                            FALSE, NULL);
6927
6928   if (item == NULL)
6929     return FALSE;
6930
6931   if (path)
6932     *path = gtk_tree_path_new_from_indices (item->index, -1);
6933
6934   if (pos)
6935     {
6936       if (drag_x < item->cell_area.x + item->cell_area.width / 4)
6937         *pos = GTK_ICON_VIEW_DROP_LEFT;
6938       else if (drag_x > item->cell_area.x + item->cell_area.width * 3 / 4)
6939         *pos = GTK_ICON_VIEW_DROP_RIGHT;
6940       else if (drag_y < item->cell_area.y + item->cell_area.height / 4)
6941         *pos = GTK_ICON_VIEW_DROP_ABOVE;
6942       else if (drag_y > item->cell_area.y + item->cell_area.height * 3 / 4)
6943         *pos = GTK_ICON_VIEW_DROP_BELOW;
6944       else
6945         *pos = GTK_ICON_VIEW_DROP_INTO;
6946     }
6947
6948   return TRUE;
6949 }
6950
6951 /**
6952  * gtk_icon_view_create_drag_icon:
6953  * @icon_view: a #GtkIconView
6954  * @path: a #GtkTreePath in @icon_view
6955  *
6956  * Creates a #cairo_surface_t representation of the item at @path.
6957  * This image is used for a drag icon.
6958  *
6959  * Return value: (transfer full): a newly-allocated surface of the drag icon.
6960  *
6961  * Since: 2.8
6962  **/
6963 cairo_surface_t *
6964 gtk_icon_view_create_drag_icon (GtkIconView *icon_view,
6965                                 GtkTreePath *path)
6966 {
6967   GtkWidget *widget;
6968   GtkStyleContext *context;
6969   cairo_t *cr;
6970   cairo_surface_t *surface;
6971   GList *l;
6972   gint index;
6973
6974   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), NULL);
6975   g_return_val_if_fail (path != NULL, NULL);
6976
6977   widget = GTK_WIDGET (icon_view);
6978   context = gtk_widget_get_style_context (widget);
6979
6980   if (!gtk_widget_get_realized (widget))
6981     return NULL;
6982
6983   index = gtk_tree_path_get_indices (path)[0];
6984
6985   for (l = icon_view->priv->items; l; l = l->next)
6986     {
6987       GtkIconViewItem *item = l->data;
6988
6989       if (index == item->index)
6990         {
6991           GdkRectangle rect = {
6992             item->cell_area.x - icon_view->priv->item_padding,
6993             item->cell_area.y - icon_view->priv->item_padding,
6994             item->cell_area.width  + icon_view->priv->item_padding * 2,
6995             item->cell_area.height + icon_view->priv->item_padding * 2
6996           };
6997
6998           surface = gdk_window_create_similar_surface (icon_view->priv->bin_window,
6999                                                        CAIRO_CONTENT_COLOR,
7000                                                        rect.width + 2,
7001                                                        rect.height + 2);
7002
7003           cr = cairo_create (surface);
7004           cairo_set_line_width (cr, 1.);
7005
7006           gtk_render_background (context, cr, 0, 0,
7007                                  rect.width + 2, rect.height + 2);
7008
7009           cairo_save (cr);
7010
7011           cairo_rectangle (cr, 1, 1, rect.width, rect.height);
7012           cairo_clip (cr);
7013
7014           gtk_icon_view_paint_item (icon_view, cr, item,
7015                                     icon_view->priv->item_padding + 1,
7016                                     icon_view->priv->item_padding + 1, FALSE);
7017
7018           cairo_restore (cr);
7019
7020           cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
7021           cairo_rectangle (cr, 0.5, 0.5, rect.width + 1, rect.height + 1);
7022           cairo_stroke (cr);
7023
7024           cairo_destroy (cr);
7025
7026           return surface;
7027         }
7028     }
7029
7030   return NULL;
7031 }
7032
7033 /**
7034  * gtk_icon_view_get_reorderable:
7035  * @icon_view: a #GtkIconView
7036  *
7037  * Retrieves whether the user can reorder the list via drag-and-drop.
7038  * See gtk_icon_view_set_reorderable().
7039  *
7040  * Return value: %TRUE if the list can be reordered.
7041  *
7042  * Since: 2.8
7043  **/
7044 gboolean
7045 gtk_icon_view_get_reorderable (GtkIconView *icon_view)
7046 {
7047   g_return_val_if_fail (GTK_IS_ICON_VIEW (icon_view), FALSE);
7048
7049   return icon_view->priv->reorderable;
7050 }
7051
7052 static const GtkTargetEntry item_targets[] = {
7053   { "GTK_TREE_MODEL_ROW", GTK_TARGET_SAME_WIDGET, 0 }
7054 };
7055
7056
7057 /**
7058  * gtk_icon_view_set_reorderable:
7059  * @icon_view: A #GtkIconView.
7060  * @reorderable: %TRUE, if the list of items can be reordered.
7061  *
7062  * This function is a convenience function to allow you to reorder models that
7063  * support the #GtkTreeDragSourceIface and the #GtkTreeDragDestIface.  Both
7064  * #GtkTreeStore and #GtkListStore support these.  If @reorderable is %TRUE, then
7065  * the user can reorder the model by dragging and dropping rows.  The
7066  * developer can listen to these changes by connecting to the model's
7067  * row_inserted and row_deleted signals. The reordering is implemented by setting up
7068  * the icon view as a drag source and destination. Therefore, drag and
7069  * drop can not be used in a reorderable view for any other purpose.
7070  *
7071  * This function does not give you any degree of control over the order -- any
7072  * reordering is allowed.  If more control is needed, you should probably
7073  * handle drag and drop manually.
7074  *
7075  * Since: 2.8
7076  **/
7077 void
7078 gtk_icon_view_set_reorderable (GtkIconView *icon_view,
7079                                gboolean     reorderable)
7080 {
7081   g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
7082
7083   reorderable = reorderable != FALSE;
7084
7085   if (icon_view->priv->reorderable == reorderable)
7086     return;
7087
7088   if (reorderable)
7089     {
7090       gtk_icon_view_enable_model_drag_source (icon_view,
7091                                               GDK_BUTTON1_MASK,
7092                                               item_targets,
7093                                               G_N_ELEMENTS (item_targets),
7094                                               GDK_ACTION_MOVE);
7095       gtk_icon_view_enable_model_drag_dest (icon_view,
7096                                             item_targets,
7097                                             G_N_ELEMENTS (item_targets),
7098                                             GDK_ACTION_MOVE);
7099     }
7100   else
7101     {
7102       gtk_icon_view_unset_model_drag_source (icon_view);
7103       gtk_icon_view_unset_model_drag_dest (icon_view);
7104     }
7105
7106   icon_view->priv->reorderable = reorderable;
7107
7108   g_object_notify (G_OBJECT (icon_view), "reorderable");
7109 }
7110
7111 static gboolean
7112 gtk_icon_view_buildable_custom_tag_start (GtkBuildable  *buildable,
7113                                           GtkBuilder    *builder,
7114                                           GObject       *child,
7115                                           const gchar   *tagname,
7116                                           GMarkupParser *parser,
7117                                           gpointer      *data)
7118 {
7119   if (parent_buildable_iface->custom_tag_start (buildable, builder, child,
7120                                                 tagname, parser, data))
7121     return TRUE;
7122
7123   return _gtk_cell_layout_buildable_custom_tag_start (buildable, builder, child,
7124                                                       tagname, parser, data);
7125 }
7126
7127 static void
7128 gtk_icon_view_buildable_custom_tag_end (GtkBuildable *buildable,
7129                                         GtkBuilder   *builder,
7130                                         GObject      *child,
7131                                         const gchar  *tagname,
7132                                         gpointer     *data)
7133 {
7134   if (!_gtk_cell_layout_buildable_custom_tag_end (buildable, builder,
7135                                                   child, tagname, data))
7136     parent_buildable_iface->custom_tag_end (buildable, builder,
7137                                             child, tagname, data);
7138 }