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

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