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