Pileus Git - ~andy/gtk/blob - gtk/gtkdnd-quartz.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1999 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser 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  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include <config.h>
  28
  29 #include <stdlib.h>
  30 #include <string.h>
  31
  32 #include "gdkconfig.h"
  33
  34 #include "gdk/gdkkeysyms.h"
  35
  36 #include "gtkdnd.h"
  37 #include "gtkiconfactory.h"
  38 #include "gtkicontheme.h"
  39 #include "gtkimage.h"
  40 #include "gtkinvisible.h"
  41 #include "gtkmain.h"
  42 #include "gtkplug.h"
  43 #include "gtkstock.h"
  44 #include "gtkwindow.h"
  45 #include "gtkintl.h"
  46 #include "gtkalias.h"
  47
  48 #include "gtkquartz.h"
  49 #include "gdk/quartz/gdkquartz.h"
  50
  51 typedef struct _GtkDragSourceSite GtkDragSourceSite;
  52 typedef struct _GtkDragSourceInfo GtkDragSourceInfo;
  53 typedef struct _GtkDragDestSite GtkDragDestSite;
  54 typedef struct _GtkDragDestInfo GtkDragDestInfo;
  55 typedef struct _GtkDragFindData GtkDragFindData;
  56
  57 static void     gtk_drag_find_widget            (GtkWidget        *widget,
  58                                                  GtkDragFindData  *data);
  59 static void     gtk_drag_dest_site_destroy      (gpointer          data);
  60 static void     gtk_drag_dest_leave             (GtkWidget        *widget,
  61                                                  GdkDragContext   *context,
  62                                                  guint             time);
  63 static GtkDragDestInfo *gtk_drag_get_dest_info  (GdkDragContext   *context,
  64                                                  gboolean          create);
  65 static void gtk_drag_source_site_destroy        (gpointer           data);
  66
  67 struct _GtkDragSourceSite
  68 {
  69   GdkModifierType    start_button_mask;
  70   GtkTargetList     *target_list;        /* Targets for drag data */
  71   GdkDragAction      actions;            /* Possible actions */
  72
  73   /* Drag icon */
  74   GtkImageType icon_type;
  75   union
  76   {
  77     GtkImagePixmapData pixmap;
  78     GtkImagePixbufData pixbuf;
  79     GtkImageStockData stock;
  80     GtkImageIconNameData name;
  81   } icon_data;
  82   GdkBitmap *icon_mask;
  83
  84   GdkColormap       *colormap;           /* Colormap for drag icon */
  85
  86   /* Stored button press information to detect drag beginning */
  87   gint               state;
  88   gint               x, y;
  89 };
  90
  91 struct _GtkDragSourceInfo
  92 {
  93   GtkWidget         *widget;
  94   GtkTargetList     *target_list; /* Targets for drag data */
  95   GdkDragAction      possible_actions; /* Actions allowed by source */
  96   GdkDragContext    *context;     /* drag context */
  97
  98   gint hot_x, hot_y;              /* Hot spot for drag */
  99   GdkPixbuf         *icon_pixbuf;
 100 };
 101
 102 struct _GtkDragDestSite
 103 {
 104   GtkDestDefaults    flags;
 105   GtkTargetList     *target_list;
 106   GdkDragAction      actions;
 107   guint              have_drag : 1;
 108 };
 109
 110 struct _GtkDragDestInfo
 111 {
 112   GtkWidget         *widget;       /* Widget in which drag is in */
 113   GdkDragContext    *context;      /* Drag context */
 114   guint              dropped : 1;     /* Set after we receive a drop */
 115   gint               drop_x, drop_y; /* Position of drop */
 116 };
 117
 118 struct _GtkDragFindData
 119 {
 120   gint x;
 121   gint y;
 122   GdkDragContext *context;
 123   GtkDragDestInfo *info;
 124   gboolean found;
 125   gboolean toplevel;
 126   gboolean (*callback) (GtkWidget *widget, GdkDragContext *context,
 127                         gint x, gint y, guint32 time);
 128   guint32 time;
 129 };
 130
 131
 132 @interface GtkDragSourceOwner : NSObject {
 133   GtkDragSourceInfo *info;
 134 }
 135
 136 @end
 137
 138 @implementation GtkDragSourceOwner
 139 -(void)pasteboard:(NSPasteboard *)sender provideDataForType:(NSString *)type
 140 {
 141   guint target_info;
 142   GtkSelectionData selection_data;
 143
 144   selection_data.selection = GDK_NONE;
 145   selection_data.data = NULL;
 146   selection_data.target = _gtk_quartz_pasteboard_type_to_atom (type);
 147
 148   if (gtk_target_list_find (info->target_list,
 149                             selection_data.target,
 150                             &target_info))
 151     {
 152       g_signal_emit_by_name (info->widget, "drag_data_get",
 153                              info->context,
 154                              &selection_data,
 155                              target_info,
 156                              time);
 157
 158       _gtk_quartz_set_selection_data_for_pasteboard (sender, &selection_data);
 159
 160       g_free (selection_data.data);
 161     }
 162 }
 163
 164 - (id)initWithInfo:(GtkDragSourceInfo *)anInfo
 165 {
 166   self = [super init];
 167
 168   if (self)
 169     {
 170       info = anInfo;
 171     }
 172
 173   return self;
 174 }
 175
 176 @end
 177
 178 void
 179 gtk_drag_get_data (GtkWidget      *widget,
 180                    GdkDragContext *context,
 181                    GdkAtom         target,
 182                    guint32         time)
 183 {
 184   id <NSDraggingInfo> dragging_info = GDK_DRAG_CONTEXT_PRIVATE (context)->dragging_info;
 185   NSPasteboard *pasteboard = [dragging_info draggingPasteboard];
 186   GtkSelectionData *selection_data;
 187   GtkDragDestInfo *info;
 188   GtkDragDestSite *site;
 189
 190   info = gtk_drag_get_dest_info (context, FALSE);
 191   site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
 192
 193   selection_data = _gtk_quartz_get_selection_data_from_pasteboard (pasteboard,
 194                                                                    target, 0);
 195
 196   if (site && site->target_list)
 197     {
 198       guint target_info;
 199
 200       if (gtk_target_list_find (site->target_list,
 201                                 selection_data->target,
 202                                 &target_info))
 203         {
 204           if (!(site->flags & GTK_DEST_DEFAULT_DROP) ||
 205               selection_data->length >= 0)
 206             g_signal_emit_by_name (widget,
 207                                    "drag_data_received",
 208                                    context, info->drop_x, info->drop_y,
 209                                    selection_data,
 210                                    target_info, time);
 211         }
 212     }
 213   else
 214     {
 215       g_signal_emit_by_name (widget,
 216                              "drag_data_received",
 217                              context, info->drop_x, info->drop_y,
 218                              selection_data,
 219                              0, time);
 220     }
 221
 222   if (site && site->flags & GTK_DEST_DEFAULT_DROP)
 223     {
 224       gtk_drag_finish (context,
 225                        (selection_data->length >= 0),
 226                        (context->action == GDK_ACTION_MOVE),
 227                        time);
 228     }
 229 }
 230
 231
 232 GtkWidget *
 233 gtk_drag_get_source_widget (GdkDragContext *context)
 234 {
 235   return NULL;
 236 }
 237
 238 void
 239 gtk_drag_finish (GdkDragContext *context,
 240                  gboolean        success,
 241                  gboolean        del,
 242                  guint32         time)
 243 {
 244 }
 245
 246 static void
 247 gtk_drag_dest_info_destroy (gpointer data)
 248 {
 249   GtkDragDestInfo *info = data;
 250
 251   g_free (info);
 252 }
 253
 254 static GtkDragDestInfo *
 255 gtk_drag_get_dest_info (GdkDragContext *context,
 256                         gboolean        create)
 257 {
 258   GtkDragDestInfo *info;
 259   static GQuark info_quark = 0;
 260   if (!info_quark)
 261     info_quark = g_quark_from_static_string ("gtk-dest-info");
 262
 263   info = g_object_get_qdata (G_OBJECT (context), info_quark);
 264   if (!info && create)
 265     {
 266       info = g_new (GtkDragDestInfo, 1);
 267       info->widget = NULL;
 268       info->context = context;
 269       info->dropped = FALSE;
 270       g_object_set_qdata_full (G_OBJECT (context), info_quark,
 271                                info, gtk_drag_dest_info_destroy);
 272     }
 273
 274   return info;
 275 }
 276
 277 static GQuark dest_info_quark = 0;
 278
 279 static GtkDragSourceInfo *
 280 gtk_drag_get_source_info (GdkDragContext *context,
 281                           gboolean        create)
 282 {
 283   GtkDragSourceInfo *info;
 284   if (!dest_info_quark)
 285     dest_info_quark = g_quark_from_static_string ("gtk-source-info");
 286
 287   info = g_object_get_qdata (G_OBJECT (context), dest_info_quark);
 288   if (!info && create)
 289     {
 290       info = g_new0 (GtkDragSourceInfo, 1);
 291       info->context = context;
 292       g_object_set_qdata (G_OBJECT (context), dest_info_quark, info);
 293     }
 294
 295   return info;
 296 }
 297
 298 static void
 299 gtk_drag_clear_source_info (GdkDragContext *context)
 300 {
 301   g_object_set_qdata (G_OBJECT (context), dest_info_quark, NULL);
 302 }
 303
 304 /*************************************************************
 305  * gtk_drag_highlight_expose:
 306  *     Callback for expose_event for highlighted widgets.
 307  *   arguments:
 308  *     widget:
 309  *     event:
 310  *     data:
 311  *   results:
 312  *************************************************************/
 313
 314 static gboolean
 315 gtk_drag_highlight_expose (GtkWidget      *widget,
 316                            GdkEventExpose *event,
 317                            gpointer        data)
 318 {
 319   gint x, y, width, height;
 320
 321   if (GTK_WIDGET_DRAWABLE (widget))
 322     {
 323       cairo_t *cr;
 324
 325       if (GTK_WIDGET_NO_WINDOW (widget))
 326         {
 327           x = widget->allocation.x;
 328           y = widget->allocation.y;
 329           width = widget->allocation.width;
 330           height = widget->allocation.height;
 331         }
 332       else
 333         {
 334           x = 0;
 335           y = 0;
 336           gdk_drawable_get_size (widget->window, &width, &height);
 337         }
 338
 339       gtk_paint_shadow (widget->style, widget->window,
 340                         GTK_STATE_NORMAL, GTK_SHADOW_OUT,
 341                         NULL, widget, "dnd",
 342                         x, y, width, height);
 343
 344       cr = gdk_cairo_create (widget->window);
 345       cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
 346       cairo_set_line_width (cr, 1.0);
 347       cairo_rectangle (cr,
 348                        x + 0.5, y + 0.5,
 349                        width - 1, height - 1);
 350       cairo_stroke (cr);
 351       cairo_destroy (cr);
 352     }
 353
 354   return FALSE;
 355 }
 356
 357 /*************************************************************
 358  * gtk_drag_highlight:
 359  *     Highlight the given widget in the default manner.
 360  *   arguments:
 361  *     widget:
 362  *   results:
 363  *************************************************************/
 364
 365 void
 366 gtk_drag_highlight (GtkWidget  *widget)
 367 {
 368   g_return_if_fail (GTK_IS_WIDGET (widget));
 369
 370   g_signal_connect_after (widget, "expose_event",
 371                           G_CALLBACK (gtk_drag_highlight_expose),
 372                           NULL);
 373
 374   gtk_widget_queue_draw (widget);
 375 }
 376
 377 /*************************************************************
 378  * gtk_drag_unhighlight:
 379  *     Refresh the given widget to remove the highlight.
 380  *   arguments:
 381  *     widget:
 382  *   results:
 383  *************************************************************/
 384
 385 void
 386 gtk_drag_unhighlight (GtkWidget *widget)
 387 {
 388   g_return_if_fail (GTK_IS_WIDGET (widget));
 389
 390   g_signal_handlers_disconnect_by_func (widget,
 391                                         gtk_drag_highlight_expose,
 392                                         NULL);
 393
 394   gtk_widget_queue_draw (widget);
 395 }
 396
 397 static NSWindow *
 398 get_toplevel_nswindow (GtkWidget *widget)
 399 {
 400   GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
 401
 402   if (GTK_WIDGET_TOPLEVEL (toplevel) && toplevel->window)
 403     return [gdk_quartz_window_get_nsview (toplevel->window) window];
 404   else
 405     return NULL;
 406 }
 407
 408 static void
 409 register_types (GtkWidget *widget, GtkDragDestSite *site)
 410 {
 411   if (site->target_list)
 412     {
 413       NSWindow *nswindow = get_toplevel_nswindow (widget);
 414       NSArray *types;
 415       NSAutoreleasePool *pool;
 416
 417       if (!nswindow)
 418         return;
 419
 420       pool = [[NSAutoreleasePool alloc] init];
 421       types = _gtk_quartz_target_list_to_pasteboard_types (site->target_list);
 422
 423       [nswindow registerForDraggedTypes:types];
 424       [pool release];
 425     }
 426 }
 427
 428 static void
 429 gtk_drag_dest_realized (GtkWidget *widget,
 430                         gpointer   user_data)
 431 {
 432   GtkDragDestSite *site = user_data;
 433
 434   register_types (widget, site);
 435 }
 436
 437 static void
 438 gtk_drag_dest_hierarchy_changed (GtkWidget *widget,
 439                                  GtkWidget *previous_toplevel,
 440                                  gpointer   user_data)
 441 {
 442   GtkDragDestSite *site = user_data;
 443
 444   register_types (widget, site);
 445 }
 446
 447 static void
 448 gtk_drag_dest_site_destroy (gpointer data)
 449 {
 450   GtkDragDestSite *site = data;
 451
 452   if (site->target_list)
 453     gtk_target_list_unref (site->target_list);
 454
 455   g_free (site);
 456 }
 457
 458 void
 459 gtk_drag_dest_set (GtkWidget            *widget,
 460                    GtkDestDefaults       flags,
 461                    const GtkTargetEntry *targets,
 462                    gint                  n_targets,
 463                    GdkDragAction         actions)
 464 {
 465   GtkDragDestSite *old_site, *site;
 466
 467   g_return_if_fail (GTK_IS_WIDGET (widget));
 468
 469   old_site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
 470   if (old_site)
 471     {
 472       g_signal_handlers_disconnect_by_func (widget,
 473                                             gtk_drag_dest_realized,
 474                                             old_site);
 475       g_signal_handlers_disconnect_by_func (widget,
 476                                             gtk_drag_dest_hierarchy_changed,
 477                                             old_site);
 478     }
 479
 480   site = g_new (GtkDragDestSite, 1);
 481   site->flags = flags;
 482   site->have_drag = FALSE;
 483   if (targets)
 484     site->target_list = gtk_target_list_new (targets, n_targets);
 485   else
 486     site->target_list = NULL;
 487   site->actions = actions;
 488
 489   if (GTK_WIDGET_REALIZED (widget))
 490     gtk_drag_dest_realized (widget, site);
 491
 492   g_signal_connect (widget, "realize",
 493                     G_CALLBACK (gtk_drag_dest_realized), site);
 494   g_signal_connect (widget, "hierarchy_changed",
 495                     G_CALLBACK (gtk_drag_dest_hierarchy_changed), site);
 496
 497   g_object_set_data_full (G_OBJECT (widget), I_("gtk-drag-dest"),
 498                           site, gtk_drag_dest_site_destroy);
 499 }
 500
 501 void
 502 gtk_drag_dest_set_proxy (GtkWidget      *widget,
 503                          GdkWindow      *proxy_window,
 504                          GdkDragProtocol protocol,
 505                          gboolean        use_coordinates)
 506 {
 507   g_warning ("gtk_drag_dest_set_proxy is not supported on Mac OS X.");
 508 }
 509
 510 void
 511 gtk_drag_dest_unset (GtkWidget *widget)
 512 {
 513   g_return_if_fail (GTK_IS_WIDGET (widget));
 514
 515   g_object_set_data (G_OBJECT (widget), I_("gtk-drag-dest"), NULL);
 516 }
 517
 518 GtkTargetList*
 519 gtk_drag_dest_get_target_list (GtkWidget *widget)
 520 {
 521   GtkDragDestSite *site;
 522
 523   g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
 524
 525   site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
 526
 527   return site ? site->target_list : NULL;
 528 }
 529
 530 void
 531 gtk_drag_dest_set_target_list (GtkWidget      *widget,
 532                                GtkTargetList  *target_list)
 533 {
 534   GtkDragDestSite *site;
 535
 536   g_return_if_fail (GTK_IS_WIDGET (widget));
 537
 538   site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
 539
 540   if (!site)
 541     {
 542       g_warning ("Can't set a target list on a widget until you've called gtk_drag_dest_set() "
 543                  "to make the widget into a drag destination");
 544       return;
 545     }
 546
 547   if (target_list)
 548     gtk_target_list_ref (target_list);
 549
 550   if (site->target_list)
 551     gtk_target_list_unref (site->target_list);
 552
 553   site->target_list = target_list;
 554
 555   register_types (widget, site);
 556 }
 557
 558 void
 559 gtk_drag_dest_add_text_targets (GtkWidget *widget)
 560 {
 561   GtkTargetList *target_list;
 562
 563   target_list = gtk_drag_dest_get_target_list (widget);
 564   if (target_list)
 565     gtk_target_list_ref (target_list);
 566   else
 567     target_list = gtk_target_list_new (NULL, 0);
 568   gtk_target_list_add_text_targets (target_list, 0);
 569   gtk_drag_dest_set_target_list (widget, target_list);
 570   gtk_target_list_unref (target_list);
 571 }
 572
 573 void
 574 gtk_drag_dest_add_image_targets (GtkWidget *widget)
 575 {
 576   GtkTargetList *target_list;
 577
 578   target_list = gtk_drag_dest_get_target_list (widget);
 579   if (target_list)
 580     gtk_target_list_ref (target_list);
 581   else
 582     target_list = gtk_target_list_new (NULL, 0);
 583   gtk_target_list_add_image_targets (target_list, 0, FALSE);
 584   gtk_drag_dest_set_target_list (widget, target_list);
 585   gtk_target_list_unref (target_list);
 586 }
 587
 588 void
 589 gtk_drag_dest_add_uri_targets (GtkWidget *widget)
 590 {
 591   GtkTargetList *target_list;
 592
 593   target_list = gtk_drag_dest_get_target_list (widget);
 594   if (target_list)
 595     gtk_target_list_ref (target_list);
 596   else
 597     target_list = gtk_target_list_new (NULL, 0);
 598   gtk_target_list_add_uri_targets (target_list, 0);
 599   gtk_drag_dest_set_target_list (widget, target_list);
 600   gtk_target_list_unref (target_list);
 601 }
 602
 603 static void
 604 prepend_and_ref_widget (GtkWidget *widget,
 605                         gpointer   data)
 606 {
 607   GSList **slist_p = data;
 608
 609   *slist_p = g_slist_prepend (*slist_p, g_object_ref (widget));
 610 }
 611
 612 static void
 613 gtk_drag_find_widget (GtkWidget       *widget,
 614                       GtkDragFindData *data)
 615 {
 616   GtkAllocation new_allocation;
 617   gint allocation_to_window_x = 0;
 618   gint allocation_to_window_y = 0;
 619   gint x_offset = 0;
 620   gint y_offset = 0;
 621
 622   if (data->found || !GTK_WIDGET_MAPPED (widget) || !GTK_WIDGET_SENSITIVE (widget))
 623     return;
 624
 625   /* Note that in the following code, we only count the
 626    * position as being inside a WINDOW widget if it is inside
 627    * widget->window; points that are outside of widget->window
 628    * but within the allocation are not counted. This is consistent
 629    * with the way we highlight drag targets.
 630    *
 631    * data->x,y are relative to widget->parent->window (if
 632    * widget is not a toplevel, widget->window otherwise).
 633    * We compute the allocation of widget in the same coordinates,
 634    * clipping to widget->window, and all intermediate
 635    * windows. If data->x,y is inside that, then we translate
 636    * our coordinates to be relative to widget->window and
 637    * recurse.
 638    */
 639   new_allocation = widget->allocation;
 640
 641   if (widget->parent)
 642     {
 643       gint tx, ty;
 644       GdkWindow *window = widget->window;
 645
 646       /* Compute the offset from allocation-relative to
 647        * window-relative coordinates.
 648        */
 649       allocation_to_window_x = widget->allocation.x;
 650       allocation_to_window_y = widget->allocation.y;
 651
 652       if (!GTK_WIDGET_NO_WINDOW (widget))
 653         {
 654           /* The allocation is relative to the parent window for
 655            * window widgets, not to widget->window.
 656            */
 657           gdk_window_get_position (window, &tx, &ty);
 658
 659           allocation_to_window_x -= tx;
 660           allocation_to_window_y -= ty;
 661         }
 662
 663       new_allocation.x = 0 + allocation_to_window_x;
 664       new_allocation.y = 0 + allocation_to_window_y;
 665
 666       while (window && window != widget->parent->window)
 667         {
 668           GdkRectangle window_rect = { 0, 0, 0, 0 };
 669
 670           gdk_drawable_get_size (window, &window_rect.width, &window_rect.height);
 671
 672           gdk_rectangle_intersect (&new_allocation, &window_rect, &new_allocation);
 673
 674           gdk_window_get_position (window, &tx, &ty);
 675           new_allocation.x += tx;
 676           x_offset += tx;
 677           new_allocation.y += ty;
 678           y_offset += ty;
 679
 680           window = gdk_window_get_parent (window);
 681         }
 682
 683       if (!window)              /* Window and widget heirarchies didn't match. */
 684         return;
 685     }
 686
 687   if (data->toplevel ||
 688       ((data->x >= new_allocation.x) && (data->y >= new_allocation.y) &&
 689        (data->x < new_allocation.x + new_allocation.width) &&
 690        (data->y < new_allocation.y + new_allocation.height)))
 691     {
 692       /* First, check if the drag is in a valid drop site in
 693        * one of our children
 694        */
 695       if (GTK_IS_CONTAINER (widget))
 696         {
 697           GtkDragFindData new_data = *data;
 698           GSList *children = NULL;
 699           GSList *tmp_list;
 700
 701           new_data.x -= x_offset;
 702           new_data.y -= y_offset;
 703           new_data.found = FALSE;
 704           new_data.toplevel = FALSE;
 705
 706           /* need to reference children temporarily in case the
 707            * ::drag_motion/::drag_drop callbacks change the widget heirarchy.
 708            */
 709           gtk_container_forall (GTK_CONTAINER (widget), prepend_and_ref_widget, &children);
 710           for (tmp_list = children; tmp_list; tmp_list = tmp_list->next)
 711             {
 712               if (!new_data.found && GTK_WIDGET_DRAWABLE (tmp_list->data))
 713                 gtk_drag_find_widget (tmp_list->data, &new_data);
 714               g_object_unref (tmp_list->data);
 715             }
 716           g_slist_free (children);
 717
 718           data->found = new_data.found;
 719         }
 720
 721       /* If not, and this widget is registered as a drop site, check to
 722        * emit "drag_motion" to check if we are actually in
 723        * a drop site.
 724        */
 725       if (!data->found &&
 726           g_object_get_data (G_OBJECT (widget), "gtk-drag-dest"))
 727         {
 728           data->found = data->callback (widget,
 729                                         data->context,
 730                                         data->x - x_offset - allocation_to_window_x,
 731                                         data->y - y_offset - allocation_to_window_y,
 732                                         data->time);
 733           /* If so, send a "drag_leave" to the last widget */
 734           if (data->found)
 735             {
 736               if (data->info->widget && data->info->widget != widget)
 737                 {
 738                   gtk_drag_dest_leave (data->info->widget, data->context, data->time);
 739                 }
 740               data->info->widget = widget;
 741             }
 742         }
 743     }
 744 }
 745
 746 static void
 747 gtk_drag_dest_leave (GtkWidget      *widget,
 748                      GdkDragContext *context,
 749                      guint           time)
 750 {
 751   GtkDragDestSite *site;
 752
 753   site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
 754   g_return_if_fail (site != NULL);
 755
 756   if ((site->flags & GTK_DEST_DEFAULT_HIGHLIGHT) && site->have_drag)
 757     gtk_drag_unhighlight (widget);
 758
 759   if (!(site->flags & GTK_DEST_DEFAULT_MOTION) || site->have_drag)
 760     g_signal_emit_by_name (widget, "drag_leave",
 761                            context, time);
 762
 763   site->have_drag = FALSE;
 764 }
 765
 766 static gboolean
 767 gtk_drag_dest_motion (GtkWidget      *widget,
 768                       GdkDragContext *context,
 769                       gint            x,
 770                       gint            y,
 771                       guint           time)
 772 {
 773   GtkDragDestSite *site;
 774   GdkDragAction action = 0;
 775   gboolean retval;
 776
 777   site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
 778   g_return_val_if_fail (site != NULL, FALSE);
 779
 780   if (site->flags & GTK_DEST_DEFAULT_MOTION)
 781     {
 782       if (context->suggested_action & site->actions)
 783         action = context->suggested_action;
 784
 785       if (action && gtk_drag_dest_find_target (widget, context, NULL))
 786         {
 787           if (!site->have_drag)
 788             {
 789               site->have_drag = TRUE;
 790               if (site->flags & GTK_DEST_DEFAULT_HIGHLIGHT)
 791                 gtk_drag_highlight (widget);
 792             }
 793
 794           gdk_drag_status (context, action, time);
 795         }
 796       else
 797         {
 798           gdk_drag_status (context, 0, time);
 799           return TRUE;
 800         }
 801     }
 802
 803   g_signal_emit_by_name (widget, "drag_motion",
 804                          context, x, y, time, &retval);
 805
 806   return (site->flags & GTK_DEST_DEFAULT_MOTION) ? TRUE : retval;
 807 }
 808
 809 static gboolean
 810 gtk_drag_dest_drop (GtkWidget        *widget,
 811                     GdkDragContext   *context,
 812                     gint              x,
 813                     gint              y,
 814                     guint             time)
 815 {
 816   GtkDragDestSite *site;
 817   GtkDragDestInfo *info;
 818   gboolean retval;
 819
 820   site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
 821   g_return_val_if_fail (site != NULL, FALSE);
 822
 823   info = gtk_drag_get_dest_info (context, FALSE);
 824   g_return_val_if_fail (info != NULL, FALSE);
 825
 826   info->drop_x = x;
 827   info->drop_y = y;
 828
 829   if (site->flags & GTK_DEST_DEFAULT_DROP)
 830     {
 831       GdkAtom target = gtk_drag_dest_find_target (widget, context, NULL);
 832
 833       if (target == GDK_NONE)
 834         {
 835           gtk_drag_finish (context, FALSE, FALSE, time);
 836           return TRUE;
 837         }
 838       else
 839         gtk_drag_get_data (widget, context, target, time);
 840     }
 841
 842   g_signal_emit_by_name (widget, "drag_drop",
 843                          context, x, y, time, &retval);
 844
 845   return (site->flags & GTK_DEST_DEFAULT_DROP) ? TRUE : retval;
 846 }
 847
 848 void
 849 gtk_drag_dest_set_track_motion (GtkWidget *widget,
 850                                 gboolean   track_motion)
 851 {
 852   g_return_if_fail (GTK_IS_WIDGET (widget));
 853
 854   /* FIXME: Implement */
 855 }
 856
 857 gboolean
 858 gtk_drag_dest_get_track_motion (GtkWidget *widget)
 859 {
 860   g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
 861
 862   /* FIXME: Implement */
 863
 864   return FALSE;
 865 }
 866
 867 void
 868 _gtk_drag_dest_handle_event (GtkWidget *toplevel,
 869                              GdkEvent  *event)
 870 {
 871   GtkDragDestInfo *info;
 872   GdkDragContext *context;
 873
 874   g_return_if_fail (toplevel != NULL);
 875   g_return_if_fail (event != NULL);
 876
 877   context = event->dnd.context;
 878
 879   info = gtk_drag_get_dest_info (context, TRUE);
 880
 881   /* Find the widget for the event */
 882   switch (event->type)
 883     {
 884     case GDK_DRAG_ENTER:
 885       break;
 886
 887     case GDK_DRAG_LEAVE:
 888       if (info->widget)
 889         {
 890           gtk_drag_dest_leave (info->widget, context, event->dnd.time);
 891           info->widget = NULL;
 892         }
 893       break;
 894
 895     case GDK_DRAG_MOTION:
 896     case GDK_DROP_START:
 897       {
 898         GtkDragFindData data;
 899         gint tx, ty;
 900
 901         if (event->type == GDK_DROP_START)
 902           {
 903             info->dropped = TRUE;
 904             /* We send a leave here so that the widget unhighlights
 905              * properly.
 906              */
 907             if (info->widget)
 908               {
 909                 gtk_drag_dest_leave (info->widget, context, event->dnd.time);
 910                 info->widget = NULL;
 911               }
 912           }
 913
 914         gdk_window_get_position (toplevel->window, &tx, &ty);
 915
 916         data.x = event->dnd.x_root - tx;
 917         data.y = event->dnd.y_root - ty;
 918         data.context = context;
 919         data.info = info;
 920         data.found = FALSE;
 921         data.toplevel = TRUE;
 922         data.callback = (event->type == GDK_DRAG_MOTION) ?
 923           gtk_drag_dest_motion : gtk_drag_dest_drop;
 924         data.time = event->dnd.time;
 925
 926         gtk_drag_find_widget (toplevel, &data);
 927
 928         if (info->widget && !data.found)
 929           {
 930             gtk_drag_dest_leave (info->widget, context, event->dnd.time);
 931             info->widget = NULL;
 932           }
 933
 934         /* Send a reply.
 935          */
 936         if (event->type == GDK_DRAG_MOTION)
 937           {
 938             if (!data.found)
 939               gdk_drag_status (context, 0, event->dnd.time);
 940           }
 941
 942         break;
 943       default:
 944         g_assert_not_reached ();
 945       }
 946     }
 947 }
 948
 949
 950 GdkAtom
 951 gtk_drag_dest_find_target (GtkWidget      *widget,
 952                            GdkDragContext *context,
 953                            GtkTargetList  *target_list)
 954 {
 955   id <NSDraggingInfo> dragging_info = GDK_DRAG_CONTEXT_PRIVATE (context)->dragging_info;
 956   NSPasteboard *pasteboard = [dragging_info draggingPasteboard];
 957   GtkWidget *source_widget;
 958   GList *tmp_target;
 959   GList *tmp_source = NULL;
 960   GList *source_targets;
 961
 962   g_return_val_if_fail (GTK_IS_WIDGET (widget), GDK_NONE);
 963   g_return_val_if_fail (GDK_IS_DRAG_CONTEXT (context), GDK_NONE);
 964   g_return_val_if_fail (!context->is_source, GDK_NONE);
 965
 966   source_widget = gtk_drag_get_source_widget (context);
 967
 968   if (target_list == NULL)
 969     target_list = gtk_drag_dest_get_target_list (widget);
 970
 971   if (target_list == NULL)
 972     return GDK_NONE;
 973
 974   source_targets = _gtk_quartz_pasteboard_types_to_atom_list ([pasteboard types]);
 975   tmp_target = target_list->list;
 976   while (tmp_target)
 977     {
 978       GtkTargetPair *pair = tmp_target->data;
 979       tmp_source = source_targets;
 980       while (tmp_source)
 981         {
 982           if (tmp_source->data == GUINT_TO_POINTER (pair->target))
 983             {
 984               if ((!(pair->flags & GTK_TARGET_SAME_APP) || source_widget) &&
 985                   (!(pair->flags & GTK_TARGET_SAME_WIDGET) || (source_widget == widget)))
 986                 {
 987                   g_list_free (source_targets);
 988                   return pair->target;
 989                 }
 990               else
 991                 break;
 992             }
 993           tmp_source = tmp_source->next;
 994         }
 995       tmp_target = tmp_target->next;
 996     }
 997
 998   g_list_free (source_targets);
 999   return GDK_NONE;
1000 }
1001
1002 static GdkDragContext *
1003 gtk_drag_begin_internal (GtkWidget         *widget,
1004                          GtkDragSourceSite *site,
1005                          GtkTargetList     *target_list,
1006                          GdkDragAction      actions,
1007                          gint               button,
1008                          GdkEvent          *event)
1009 {
1010   GtkDragSourceInfo *info;
1011   GdkDragContext *context;
1012   NSWindow *nswindow;
1013   NSPasteboard *pasteboard;
1014   GtkDragSourceOwner *owner;
1015   NSEvent *nsevent;
1016   NSPoint point;
1017
1018   context = gdk_drag_begin (NULL, NULL);
1019   context->is_source = TRUE;
1020
1021   info = gtk_drag_get_source_info (context, TRUE);
1022
1023   info->widget = gtk_widget_ref (widget);
1024   info->target_list = target_list;
1025   gtk_target_list_ref (target_list);
1026
1027   info->possible_actions = actions;
1028
1029   g_signal_emit_by_name (widget, "drag_begin", info->context);
1030
1031   /* Ensure that we have an icon before we start the drag; the
1032    * application may have set one in ::drag_begin, or it may
1033    * not have set one.
1034    */
1035   if (!info->icon_pixbuf)
1036     {
1037       if (!site || site->icon_type == GTK_IMAGE_EMPTY)
1038         gtk_drag_set_icon_default (context);
1039       else
1040         switch (site->icon_type)
1041           {
1042           case GTK_IMAGE_PIXMAP:
1043             /* This is not supported, so just set a small transparent pixbuf
1044              * since we need to have something.
1045              */
1046             if (0)
1047               gtk_drag_set_icon_pixmap (context,
1048                                         site->colormap,
1049                                         site->icon_data.pixmap.pixmap,
1050                                         site->icon_mask,
1051                                         -2, -2);
1052             else
1053               {
1054                 GdkPixbuf *pixbuf;
1055
1056                 pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, 1, 1);
1057                 gdk_pixbuf_fill (pixbuf, 0xffffff);
1058
1059                 gtk_drag_set_icon_pixbuf (context,
1060                                           pixbuf,
1061                                           0, 0);
1062
1063                 g_object_unref (pixbuf);
1064               }
1065             break;
1066           case GTK_IMAGE_PIXBUF:
1067             gtk_drag_set_icon_pixbuf (context,
1068                                       site->icon_data.pixbuf.pixbuf,
1069                                       -2, -2);
1070             break;
1071           case GTK_IMAGE_STOCK:
1072             gtk_drag_set_icon_stock (context,
1073                                      site->icon_data.stock.stock_id,
1074                                      -2, -2);
1075             break;
1076           case GTK_IMAGE_ICON_NAME:
1077             gtk_drag_set_icon_name (context,
1078                                     site->icon_data.name.icon_name,
1079                                     -2, -2);
1080             break;
1081           case GTK_IMAGE_EMPTY:
1082           default:
1083             g_assert_not_reached();
1084             break;
1085           }
1086     }
1087
1088   gdk_pointer_ungrab (0);
1089
1090   pasteboard = [NSPasteboard pasteboardWithName:NSDragPboard];
1091   owner = [[GtkDragSourceOwner alloc] initWithInfo:info];
1092
1093   [pasteboard declareTypes:_gtk_quartz_target_list_to_pasteboard_types (target_list) owner:owner];
1094
1095   /* Ref the context. It's unreffed when the drag has been aborted */
1096   g_object_ref (info->context);
1097
1098   nswindow = get_toplevel_nswindow (widget);
1099
1100   /* FIXME: If the event isn't a mouse event, use the global cursor position instead */
1101   nsevent = [nswindow currentEvent];
1102   point = [nsevent locationInWindow];
1103
1104   [nswindow dragImage:_gtk_quartz_create_image_from_pixbuf (info->icon_pixbuf)
1105                    at:point
1106                offset:NSMakeSize(0, 0)
1107                 event:nsevent
1108            pasteboard:pasteboard
1109                source:nswindow
1110             slideBack:YES];
1111
1112   return info->context;
1113 }
1114
1115 GdkDragContext *
1116 gtk_drag_begin (GtkWidget         *widget,
1117                 GtkTargetList     *targets,
1118                 GdkDragAction      actions,
1119                 gint               button,
1120                 GdkEvent          *event)
1121 {
1122   g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
1123   g_return_val_if_fail (GTK_WIDGET_REALIZED (widget), NULL);
1124   g_return_val_if_fail (targets != NULL, NULL);
1125
1126   return gtk_drag_begin_internal (widget, NULL, targets,
1127                                   actions, button, event);
1128 }
1129
1130
1131 static gboolean
1132 gtk_drag_source_event_cb (GtkWidget      *widget,
1133                           GdkEvent       *event,
1134                           gpointer        data)
1135 {
1136   GtkDragSourceSite *site;
1137   gboolean retval = FALSE;
1138   site = (GtkDragSourceSite *)data;
1139
1140   switch (event->type)
1141     {
1142     case GDK_BUTTON_PRESS:
1143       if ((GDK_BUTTON1_MASK << (event->button.button - 1)) & site->start_button_mask)
1144         {
1145           site->state |= (GDK_BUTTON1_MASK << (event->button.button - 1));
1146           site->x = event->button.x;
1147           site->y = event->button.y;
1148         }
1149       break;
1150
1151     case GDK_BUTTON_RELEASE:
1152       if ((GDK_BUTTON1_MASK << (event->button.button - 1)) & site->start_button_mask)
1153         site->state &= ~(GDK_BUTTON1_MASK << (event->button.button - 1));
1154       break;
1155
1156     case GDK_MOTION_NOTIFY:
1157       if (site->state & event->motion.state & site->start_button_mask)
1158         {
1159           /* FIXME: This is really broken and can leave us
1160            * with a stuck grab
1161            */
1162           int i;
1163           for (i=1; i<6; i++)
1164             {
1165               if (site->state & event->motion.state &
1166                   GDK_BUTTON1_MASK << (i - 1))
1167                 break;
1168             }
1169
1170           if (gtk_drag_check_threshold (widget, site->x, site->y,
1171                                         event->motion.x, event->motion.y))
1172             {
1173               site->state = 0;
1174               gtk_drag_begin_internal (widget, site, site->target_list,
1175                                        site->actions,
1176                                        i, event);
1177
1178               retval = TRUE;
1179             }
1180         }
1181       break;
1182
1183     default:                    /* hit for 2/3BUTTON_PRESS */
1184       break;
1185     }
1186
1187   return retval;
1188 }
1189
1190 void
1191 gtk_drag_source_set (GtkWidget            *widget,
1192                      GdkModifierType       start_button_mask,
1193                      const GtkTargetEntry *targets,
1194                      gint                  n_targets,
1195                      GdkDragAction         actions)
1196 {
1197   GtkDragSourceSite *site;
1198
1199   g_return_if_fail (GTK_IS_WIDGET (widget));
1200
1201   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1202
1203   gtk_widget_add_events (widget,
1204                          gtk_widget_get_events (widget) |
1205                          GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
1206                          GDK_BUTTON_MOTION_MASK);
1207
1208   if (site)
1209     {
1210       if (site->target_list)
1211         gtk_target_list_unref (site->target_list);
1212     }
1213   else
1214     {
1215       site = g_new0 (GtkDragSourceSite, 1);
1216
1217       site->icon_type = GTK_IMAGE_EMPTY;
1218
1219       g_signal_connect (widget, "button_press_event",
1220                         G_CALLBACK (gtk_drag_source_event_cb),
1221                         site);
1222       g_signal_connect (widget, "button_release_event",
1223                         G_CALLBACK (gtk_drag_source_event_cb),
1224                         site);
1225       g_signal_connect (widget, "motion_notify_event",
1226                         G_CALLBACK (gtk_drag_source_event_cb),
1227                         site);
1228
1229       g_object_set_data_full (G_OBJECT (widget),
1230                               I_("gtk-site-data"),
1231                               site, gtk_drag_source_site_destroy);
1232     }
1233
1234   site->start_button_mask = start_button_mask;
1235
1236   site->target_list = gtk_target_list_new (targets, n_targets);
1237
1238   site->actions = actions;
1239 }
1240
1241 /*************************************************************
1242  * gtk_drag_source_unset
1243  *     Unregister this widget as a drag source.
1244  *   arguments:
1245  *     widget:
1246  *   results:
1247  *************************************************************/
1248
1249 void
1250 gtk_drag_source_unset (GtkWidget *widget)
1251 {
1252   GtkDragSourceSite *site;
1253
1254   g_return_if_fail (GTK_IS_WIDGET (widget));
1255
1256   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1257
1258   if (site)
1259     {
1260       g_signal_handlers_disconnect_by_func (widget,
1261                                             gtk_drag_source_event_cb,
1262                                             site);
1263       g_object_set_data (G_OBJECT (widget), I_("gtk-site-data"), NULL);
1264     }
1265 }
1266
1267 GtkTargetList *
1268 gtk_drag_source_get_target_list (GtkWidget *widget)
1269 {
1270   GtkDragSourceSite *site;
1271
1272   g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
1273
1274   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1275
1276   return site ? site->target_list : NULL;
1277
1278 }
1279
1280 void
1281 gtk_drag_source_set_target_list (GtkWidget     *widget,
1282                                  GtkTargetList *target_list)
1283 {
1284   GtkDragSourceSite *site;
1285
1286   g_return_if_fail (GTK_IS_WIDGET (widget));
1287
1288   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1289   if (site == NULL)
1290     {
1291       g_warning ("gtk_drag_source_set_target_list() requires the widget "
1292                  "to already be a drag source.");
1293       return;
1294     }
1295
1296   if (target_list)
1297     gtk_target_list_ref (target_list);
1298
1299   if (site->target_list)
1300     gtk_target_list_unref (site->target_list);
1301
1302   site->target_list = target_list;
1303 }
1304
1305 /**
1306  * gtk_drag_source_add_text_targets:
1307  * @widget: a #GtkWidget that's is a drag source
1308  *
1309  * Add the text targets supported by #GtkSelection to
1310  * the target list of the drag source.  The targets
1311  * are added with @info = 0. If you need another value,
1312  * use gtk_target_list_add_text_targets() and
1313  * gtk_drag_source_set_target_list().
1314  *
1315  * Since: 2.6
1316  **/
1317 void
1318 gtk_drag_source_add_text_targets (GtkWidget *widget)
1319 {
1320   GtkTargetList *target_list;
1321
1322   target_list = gtk_drag_source_get_target_list (widget);
1323   if (target_list)
1324     gtk_target_list_ref (target_list);
1325   else
1326     target_list = gtk_target_list_new (NULL, 0);
1327   gtk_target_list_add_text_targets (target_list, 0);
1328   gtk_drag_source_set_target_list (widget, target_list);
1329   gtk_target_list_unref (target_list);
1330 }
1331
1332 void
1333 gtk_drag_source_add_image_targets (GtkWidget *widget)
1334 {
1335   GtkTargetList *target_list;
1336
1337   target_list = gtk_drag_source_get_target_list (widget);
1338   if (target_list)
1339     gtk_target_list_ref (target_list);
1340   else
1341     target_list = gtk_target_list_new (NULL, 0);
1342   gtk_target_list_add_image_targets (target_list, 0, TRUE);
1343   gtk_drag_source_set_target_list (widget, target_list);
1344   gtk_target_list_unref (target_list);
1345 }
1346
1347 void
1348 gtk_drag_source_add_uri_targets (GtkWidget *widget)
1349 {
1350   GtkTargetList *target_list;
1351
1352   target_list = gtk_drag_source_get_target_list (widget);
1353   if (target_list)
1354     gtk_target_list_ref (target_list);
1355   else
1356     target_list = gtk_target_list_new (NULL, 0);
1357   gtk_target_list_add_uri_targets (target_list, 0);
1358   gtk_drag_source_set_target_list (widget, target_list);
1359   gtk_target_list_unref (target_list);
1360 }
1361
1362 static void
1363 gtk_drag_source_unset_icon (GtkDragSourceSite *site)
1364 {
1365   switch (site->icon_type)
1366     {
1367     case GTK_IMAGE_EMPTY:
1368       break;
1369     case GTK_IMAGE_PIXMAP:
1370       if (site->icon_data.pixmap.pixmap)
1371         g_object_unref (site->icon_data.pixmap.pixmap);
1372       if (site->icon_mask)
1373         g_object_unref (site->icon_mask);
1374       break;
1375     case GTK_IMAGE_PIXBUF:
1376       g_object_unref (site->icon_data.pixbuf.pixbuf);
1377       break;
1378     case GTK_IMAGE_STOCK:
1379       g_free (site->icon_data.stock.stock_id);
1380       break;
1381     case GTK_IMAGE_ICON_NAME:
1382       g_free (site->icon_data.name.icon_name);
1383       break;
1384     default:
1385       g_assert_not_reached();
1386       break;
1387     }
1388   site->icon_type = GTK_IMAGE_EMPTY;
1389
1390   if (site->colormap)
1391     g_object_unref (site->colormap);
1392   site->colormap = NULL;
1393 }
1394
1395 static void
1396 gtk_drag_source_site_destroy (gpointer data)
1397 {
1398   GtkDragSourceSite *site = data;
1399
1400   if (site->target_list)
1401     gtk_target_list_unref (site->target_list);
1402
1403   gtk_drag_source_unset_icon (site);
1404   g_free (site);
1405 }
1406
1407 void
1408 gtk_drag_source_set_icon (GtkWidget     *widget,
1409                           GdkColormap   *colormap,
1410                           GdkPixmap     *pixmap,
1411                           GdkBitmap     *mask)
1412 {
1413   GtkDragSourceSite *site;
1414
1415   g_return_if_fail (GTK_IS_WIDGET (widget));
1416   g_return_if_fail (GDK_IS_COLORMAP (colormap));
1417   g_return_if_fail (GDK_IS_PIXMAP (pixmap));
1418   g_return_if_fail (!mask || GDK_IS_PIXMAP (mask));
1419
1420   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1421   g_return_if_fail (site != NULL);
1422
1423   g_object_ref (colormap);
1424   g_object_ref (pixmap);
1425   if (mask)
1426     g_object_ref (mask);
1427
1428   gtk_drag_source_unset_icon (site);
1429
1430   site->icon_type = GTK_IMAGE_PIXMAP;
1431
1432   site->icon_data.pixmap.pixmap = pixmap;
1433   site->icon_mask = mask;
1434   site->colormap = colormap;
1435 }
1436
1437 void
1438 gtk_drag_source_set_icon_pixbuf (GtkWidget   *widget,
1439                                  GdkPixbuf   *pixbuf)
1440 {
1441   GtkDragSourceSite *site;
1442
1443   g_return_if_fail (GTK_IS_WIDGET (widget));
1444   g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
1445
1446   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1447   g_return_if_fail (site != NULL);
1448   g_object_ref (pixbuf);
1449
1450   gtk_drag_source_unset_icon (site);
1451
1452   site->icon_type = GTK_IMAGE_PIXBUF;
1453   site->icon_data.pixbuf.pixbuf = pixbuf;
1454 }
1455
1456 /**
1457  * gtk_drag_source_set_icon_stock:
1458  * @widget: a #GtkWidget
1459  * @stock_id: the ID of the stock icon to use
1460  *
1461  * Sets the icon that will be used for drags from a particular source
1462  * to a stock icon.
1463  **/
1464 void
1465 gtk_drag_source_set_icon_stock (GtkWidget   *widget,
1466                                 const gchar *stock_id)
1467 {
1468   GtkDragSourceSite *site;
1469
1470   g_return_if_fail (GTK_IS_WIDGET (widget));
1471   g_return_if_fail (stock_id != NULL);
1472
1473   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1474   g_return_if_fail (site != NULL);
1475
1476   gtk_drag_source_unset_icon (site);
1477
1478   site->icon_type = GTK_IMAGE_STOCK;
1479   site->icon_data.stock.stock_id = g_strdup (stock_id);
1480 }
1481
1482 /**
1483  * gtk_drag_source_set_icon_name:
1484  * @widget: a #GtkWidget
1485  * @icon_name: name of icon to use
1486  *
1487  * Sets the icon that will be used for drags from a particular source
1488  * to a themed icon. See the docs for #GtkIconTheme for more details.
1489  *
1490  * Since: 2.8
1491  **/
1492 void
1493 gtk_drag_source_set_icon_name (GtkWidget   *widget,
1494                                const gchar *icon_name)
1495 {
1496   GtkDragSourceSite *site;
1497
1498   g_return_if_fail (GTK_IS_WIDGET (widget));
1499   g_return_if_fail (icon_name != NULL);
1500
1501   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1502   g_return_if_fail (site != NULL);
1503
1504   gtk_drag_source_unset_icon (site);
1505
1506   site->icon_type = GTK_IMAGE_ICON_NAME;
1507   site->icon_data.name.icon_name = g_strdup (icon_name);
1508 }
1509
1510
1511 /**
1512  * gtk_drag_set_icon_widget:
1513  * @context: the context for a drag. (This must be called
1514           with a  context for the source side of a drag)
1515  * @widget: a toplevel window to use as an icon.
1516  * @hot_x: the X offset within @widget of the hotspot.
1517  * @hot_y: the Y offset within @widget of the hotspot.
1518  *
1519  * Changes the icon for a widget to a given widget. GTK+
1520  * will not destroy the icon, so if you don't want
1521  * it to persist, you should connect to the "drag_end"
1522  * signal and destroy it yourself.
1523  **/
1524 void
1525 gtk_drag_set_icon_widget (GdkDragContext    *context,
1526                           GtkWidget         *widget,
1527                           gint               hot_x,
1528                           gint               hot_y)
1529 {
1530   g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
1531   g_return_if_fail (context->is_source);
1532   g_return_if_fail (GTK_IS_WIDGET (widget));
1533
1534   g_warning ("gtk_drag_set_icon_widget is not supported on Mac OS X");
1535 }
1536
1537 static void
1538 set_icon_stock_pixbuf (GdkDragContext    *context,
1539                        const gchar       *stock_id,
1540                        GdkPixbuf         *pixbuf,
1541                        gint               hot_x,
1542                        gint               hot_y)
1543 {
1544   GtkDragSourceInfo *info;
1545
1546   info = gtk_drag_get_source_info (context, FALSE);
1547
1548   if (stock_id)
1549     {
1550       pixbuf = gtk_widget_render_icon (info->widget, stock_id,
1551                                        GTK_ICON_SIZE_DND, NULL);
1552
1553       if (!pixbuf)
1554         {
1555           g_warning ("Cannot load drag icon from stock_id %s", stock_id);
1556           return;
1557         }
1558     }
1559   else
1560     g_object_ref (pixbuf);
1561
1562   if (info->icon_pixbuf)
1563     g_object_unref (info->icon_pixbuf);
1564   info->icon_pixbuf = pixbuf;
1565   info->hot_x = hot_x;
1566   info->hot_y = hot_y;
1567 }
1568
1569 /**
1570  * gtk_drag_set_icon_pixbuf:
1571  * @context: the context for a drag. (This must be called
1572  *            with a  context for the source side of a drag)
1573  * @pixbuf: the #GdkPixbuf to use as the drag icon.
1574  * @hot_x: the X offset within @widget of the hotspot.
1575  * @hot_y: the Y offset within @widget of the hotspot.
1576  *
1577  * Sets @pixbuf as the icon for a given drag.
1578  **/
1579 void
1580 gtk_drag_set_icon_pixbuf  (GdkDragContext *context,
1581                            GdkPixbuf      *pixbuf,
1582                            gint            hot_x,
1583                            gint            hot_y)
1584 {
1585   g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
1586   g_return_if_fail (context->is_source);
1587   g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
1588
1589   set_icon_stock_pixbuf (context, NULL, pixbuf, hot_x, hot_y);
1590 }
1591
1592 /**
1593  * gtk_drag_set_icon_stock:
1594  * @context: the context for a drag. (This must be called
1595  *            with a  context for the source side of a drag)
1596  * @stock_id: the ID of the stock icon to use for the drag.
1597  * @hot_x: the X offset within the icon of the hotspot.
1598  * @hot_y: the Y offset within the icon of the hotspot.
1599  *
1600  * Sets the icon for a given drag from a stock ID.
1601  **/
1602 void
1603 gtk_drag_set_icon_stock  (GdkDragContext *context,
1604                           const gchar    *stock_id,
1605                           gint            hot_x,
1606                           gint            hot_y)
1607 {
1608
1609   g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
1610   g_return_if_fail (context->is_source);
1611   g_return_if_fail (stock_id != NULL);
1612
1613   set_icon_stock_pixbuf (context, stock_id, NULL, hot_x, hot_y);
1614 }
1615
1616 /**
1617  * gtk_drag_set_icon_pixmap:
1618  * @context: the context for a drag. (This must be called
1619  *            with a  context for the source side of a drag)
1620  * @colormap: the colormap of the icon
1621  * @pixmap: the image data for the icon
1622  * @mask: the transparency mask for the icon
1623  * @hot_x: the X offset within @pixmap of the hotspot.
1624  * @hot_y: the Y offset within @pixmap of the hotspot.
1625  *
1626  * Sets @pixmap as the icon for a given drag. GTK+ retains
1627  * references for the arguments, and will release them when
1628  * they are no longer needed. In general, gtk_drag_set_icon_pixbuf()
1629  * will be more convenient to use.
1630  **/
1631 void
1632 gtk_drag_set_icon_pixmap (GdkDragContext    *context,
1633                           GdkColormap       *colormap,
1634                           GdkPixmap         *pixmap,
1635                           GdkBitmap         *mask,
1636                           gint               hot_x,
1637                           gint               hot_y)
1638 {
1639   g_warning ("gtk_drag_set_icon_pixmap is not supported on Mac OS X");
1640 }
1641
1642 /**
1643  * gtk_drag_set_icon_name:
1644  * @context: the context for a drag. (This must be called
1645  *            with a context for the source side of a drag)
1646  * @icon_name: name of icon to use
1647  * @hot_x: the X offset of the hotspot within the icon
1648  * @hot_y: the Y offset of the hotspot within the icon
1649  *
1650  * Sets the icon for a given drag from a named themed icon. See
1651  * the docs for #GtkIconTheme for more details. Note that the
1652  * size of the icon depends on the icon theme (the icon is
1653  * loaded at the symbolic size #GTK_ICON_SIZE_DND), thus
1654  * @hot_x and @hot_y have to be used with care.
1655  *
1656  * Since: 2.8
1657  **/
1658 void
1659 gtk_drag_set_icon_name (GdkDragContext *context,
1660                         const gchar    *icon_name,
1661                         gint            hot_x,
1662                         gint            hot_y)
1663 {
1664   GdkScreen *screen;
1665   GtkSettings *settings;
1666   GtkIconTheme *icon_theme;
1667   GdkPixbuf *pixbuf;
1668   gint width, height, icon_size;
1669
1670   g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
1671   g_return_if_fail (context->is_source);
1672   g_return_if_fail (icon_name != NULL);
1673
1674   screen = gdk_drawable_get_screen (context->source_window);
1675   g_return_if_fail (screen != NULL);
1676
1677   settings = gtk_settings_get_for_screen (screen);
1678   if (gtk_icon_size_lookup_for_settings (settings,
1679                                          GTK_ICON_SIZE_DND,
1680                                          &width, &height))
1681     icon_size = MAX (width, height);
1682   else
1683     icon_size = 32; /* default value for GTK_ICON_SIZE_DND */
1684
1685   icon_theme = gtk_icon_theme_get_for_screen (screen);
1686
1687   pixbuf = gtk_icon_theme_load_icon (icon_theme, icon_name,
1688                                      icon_size, 0, NULL);
1689   if (pixbuf)
1690     set_icon_stock_pixbuf (context, NULL, pixbuf, hot_x, hot_y);
1691   else
1692     g_warning ("Cannot load drag icon from icon name %s", icon_name);
1693 }
1694
1695 /**
1696  * gtk_drag_set_icon_default:
1697  * @context: the context for a drag. (This must be called
1698              with a  context for the source side of a drag)
1699  *
1700  * Sets the icon for a particular drag to the default
1701  * icon.
1702  **/
1703 void
1704 gtk_drag_set_icon_default (GdkDragContext    *context)
1705 {
1706   g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
1707   g_return_if_fail (context->is_source);
1708
1709   gtk_drag_set_icon_stock (context, GTK_STOCK_DND, -2, -2);
1710 }
1711
1712 void
1713 gtk_drag_set_default_icon (GdkColormap   *colormap,
1714                            GdkPixmap     *pixmap,
1715                            GdkBitmap     *mask,
1716                            gint           hot_x,
1717                            gint           hot_y)
1718 {
1719   g_warning ("gtk_drag_set_default_icon is not supported on Mac OS X.");
1720 }
1721
1722 static void
1723 gtk_drag_source_info_destroy (GtkDragSourceInfo *info)
1724 {
1725   if (info->icon_pixbuf)
1726     g_object_unref (info->icon_pixbuf);
1727
1728   g_signal_emit_by_name (info->widget, "drag_end",
1729                          info->context);
1730
1731   if (info->widget)
1732     g_object_unref (info->widget);
1733
1734   gtk_target_list_unref (info->target_list);
1735
1736   gtk_drag_clear_source_info (info->context);
1737   g_object_unref (info->context);
1738
1739   g_free (info);
1740 }
1741
1742 static void
1743 gtk_drag_drop_finished (GtkDragSourceInfo *info)
1744 {
1745   gtk_drag_source_info_destroy (info);
1746 }
1747
1748 /*************************************************************
1749  * _gtk_drag_source_handle_event:
1750  *     Called from widget event handling code on Drag events
1751  *     for drag sources.
1752  *
1753  *   arguments:
1754  *     toplevel: Toplevel widget that received the event
1755  *     event:
1756  *   results:
1757  *************************************************************/
1758
1759 void
1760 _gtk_drag_source_handle_event (GtkWidget *widget,
1761                                GdkEvent  *event)
1762 {
1763   GtkDragSourceInfo *info;
1764   GdkDragContext *context;
1765
1766   g_return_if_fail (widget != NULL);
1767   g_return_if_fail (event != NULL);
1768
1769   context = event->dnd.context;
1770   info = gtk_drag_get_source_info (context, FALSE);
1771   if (!info)
1772     return;
1773
1774   switch (event->type)
1775     {
1776     case GDK_DROP_FINISHED:
1777       gtk_drag_drop_finished (info);
1778       break;
1779     default:
1780       g_assert_not_reached ();
1781     }
1782 }
1783
1784
1785 gboolean
1786 gtk_drag_check_threshold (GtkWidget *widget,
1787                           gint       start_x,
1788                           gint       start_y,
1789                           gint       current_x,
1790                           gint       current_y)
1791 {
1792   gint drag_threshold;
1793
1794   g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
1795
1796   g_object_get (gtk_widget_get_settings (widget),
1797                 "gtk-dnd-drag-threshold", &drag_threshold,
1798                 NULL);
1799
1800   return (ABS (current_x - start_x) > drag_threshold ||
1801           ABS (current_y - start_y) > drag_threshold);
1802 }
1803
1804 #define __GTK_DND_C__
1805 #include "gtkaliasdef.c"