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_handle_event (GtkWidget *toplevel,
 850                              GdkEvent  *event)
 851 {
 852   GtkDragDestInfo *info;
 853   GdkDragContext *context;
 854
 855   g_return_if_fail (toplevel != NULL);
 856   g_return_if_fail (event != NULL);
 857
 858   context = event->dnd.context;
 859
 860   info = gtk_drag_get_dest_info (context, TRUE);
 861
 862   /* Find the widget for the event */
 863   switch (event->type)
 864     {
 865     case GDK_DRAG_ENTER:
 866       break;
 867
 868     case GDK_DRAG_LEAVE:
 869       if (info->widget)
 870         {
 871           gtk_drag_dest_leave (info->widget, context, event->dnd.time);
 872           info->widget = NULL;
 873         }
 874       break;
 875
 876     case GDK_DRAG_MOTION:
 877     case GDK_DROP_START:
 878       {
 879         GtkDragFindData data;
 880         gint tx, ty;
 881
 882         if (event->type == GDK_DROP_START)
 883           {
 884             info->dropped = TRUE;
 885             /* We send a leave here so that the widget unhighlights
 886              * properly.
 887              */
 888             if (info->widget)
 889               {
 890                 gtk_drag_dest_leave (info->widget, context, event->dnd.time);
 891                 info->widget = NULL;
 892               }
 893           }
 894
 895         gdk_window_get_position (toplevel->window, &tx, &ty);
 896
 897         data.x = event->dnd.x_root - tx;
 898         data.y = event->dnd.y_root - ty;
 899         data.context = context;
 900         data.info = info;
 901         data.found = FALSE;
 902         data.toplevel = TRUE;
 903         data.callback = (event->type == GDK_DRAG_MOTION) ?
 904           gtk_drag_dest_motion : gtk_drag_dest_drop;
 905         data.time = event->dnd.time;
 906
 907         gtk_drag_find_widget (toplevel, &data);
 908
 909         if (info->widget && !data.found)
 910           {
 911             gtk_drag_dest_leave (info->widget, context, event->dnd.time);
 912             info->widget = NULL;
 913           }
 914
 915         /* Send a reply.
 916          */
 917         if (event->type == GDK_DRAG_MOTION)
 918           {
 919             if (!data.found)
 920               gdk_drag_status (context, 0, event->dnd.time);
 921           }
 922
 923         break;
 924       default:
 925         g_assert_not_reached ();
 926       }
 927     }
 928 }
 929
 930
 931 GdkAtom
 932 gtk_drag_dest_find_target (GtkWidget      *widget,
 933                            GdkDragContext *context,
 934                            GtkTargetList  *target_list)
 935 {
 936   id <NSDraggingInfo> dragging_info = GDK_DRAG_CONTEXT_PRIVATE (context)->dragging_info;
 937   NSPasteboard *pasteboard = [dragging_info draggingPasteboard];
 938   GtkWidget *source_widget;
 939   GList *tmp_target;
 940   GList *tmp_source = NULL;
 941   GList *source_targets;
 942
 943   g_return_val_if_fail (GTK_IS_WIDGET (widget), GDK_NONE);
 944   g_return_val_if_fail (GDK_IS_DRAG_CONTEXT (context), GDK_NONE);
 945   g_return_val_if_fail (!context->is_source, GDK_NONE);
 946
 947   source_widget = gtk_drag_get_source_widget (context);
 948
 949   if (target_list == NULL)
 950     target_list = gtk_drag_dest_get_target_list (widget);
 951
 952   if (target_list == NULL)
 953     return GDK_NONE;
 954
 955   source_targets = _gtk_quartz_pasteboard_types_to_atom_list ([pasteboard types]);
 956   tmp_target = target_list->list;
 957   while (tmp_target)
 958     {
 959       GtkTargetPair *pair = tmp_target->data;
 960       tmp_source = source_targets;
 961       while (tmp_source)
 962         {
 963           if (tmp_source->data == GUINT_TO_POINTER (pair->target))
 964             {
 965               if ((!(pair->flags & GTK_TARGET_SAME_APP) || source_widget) &&
 966                   (!(pair->flags & GTK_TARGET_SAME_WIDGET) || (source_widget == widget)))
 967                 {
 968                   g_list_free (source_targets);
 969                   return pair->target;
 970                 }
 971               else
 972                 break;
 973             }
 974           tmp_source = tmp_source->next;
 975         }
 976       tmp_target = tmp_target->next;
 977     }
 978
 979   g_list_free (source_targets);
 980   return GDK_NONE;
 981 }
 982
 983 static GdkDragContext *
 984 gtk_drag_begin_internal (GtkWidget         *widget,
 985                          GtkDragSourceSite *site,
 986                          GtkTargetList     *target_list,
 987                          GdkDragAction      actions,
 988                          gint               button,
 989                          GdkEvent          *event)
 990 {
 991   GtkDragSourceInfo *info;
 992   GdkDragContext *context;
 993   NSWindow *nswindow;
 994   NSPasteboard *pasteboard;
 995   GtkDragSourceOwner *owner;
 996   NSEvent *nsevent;
 997   NSPoint point;
 998
 999   context = gdk_drag_begin (NULL, NULL);
1000   context->is_source = TRUE;
1001
1002   info = gtk_drag_get_source_info (context, TRUE);
1003
1004   info->widget = gtk_widget_ref (widget);
1005   info->target_list = target_list;
1006   gtk_target_list_ref (target_list);
1007
1008   info->possible_actions = actions;
1009
1010   g_signal_emit_by_name (widget, "drag_begin", info->context);
1011
1012   /* Ensure that we have an icon before we start the drag; the
1013    * application may have set one in ::drag_begin, or it may
1014    * not have set one.
1015    */
1016   if (!info->icon_pixbuf)
1017     {
1018       if (!site || site->icon_type == GTK_IMAGE_EMPTY)
1019         gtk_drag_set_icon_default (context);
1020       else
1021         switch (site->icon_type)
1022           {
1023           case GTK_IMAGE_PIXMAP:
1024             gtk_drag_set_icon_pixmap (context,
1025                                       site->colormap,
1026                                       site->icon_data.pixmap.pixmap,
1027                                       site->icon_mask,
1028                                       -2, -2);
1029             break;
1030           case GTK_IMAGE_PIXBUF:
1031             gtk_drag_set_icon_pixbuf (context,
1032                                       site->icon_data.pixbuf.pixbuf,
1033                                       -2, -2);
1034             break;
1035           case GTK_IMAGE_STOCK:
1036             gtk_drag_set_icon_stock (context,
1037                                      site->icon_data.stock.stock_id,
1038                                      -2, -2);
1039             break;
1040           case GTK_IMAGE_ICON_NAME:
1041             gtk_drag_set_icon_name (context,
1042                                     site->icon_data.name.icon_name,
1043                                     -2, -2);
1044             break;
1045           case GTK_IMAGE_EMPTY:
1046           default:
1047             g_assert_not_reached();
1048             break;
1049           }
1050     }
1051
1052   gdk_pointer_ungrab (0);
1053
1054   pasteboard = [NSPasteboard pasteboardWithName:NSDragPboard];
1055   owner = [[GtkDragSourceOwner alloc] initWithInfo:info];
1056
1057   [pasteboard declareTypes:_gtk_quartz_target_list_to_pasteboard_types (target_list) owner:owner];
1058
1059   /* Ref the context. It's unreffed when the drag has been aborted */
1060   g_object_ref (info->context);
1061
1062   nswindow = get_toplevel_nswindow (widget);
1063
1064   /* FIXME: If the event isn't a mouse event, use the global cursor position instead */
1065   nsevent = [nswindow currentEvent];
1066   point = [nsevent locationInWindow];
1067
1068   [nswindow dragImage:_gtk_quartz_create_image_from_pixbuf (info->icon_pixbuf)
1069                    at:point
1070                offset:NSMakeSize(0, 0)
1071                 event:nsevent
1072            pasteboard:pasteboard
1073                source:nswindow
1074             slideBack:YES];
1075
1076   return info->context;
1077 }
1078
1079 GdkDragContext *
1080 gtk_drag_begin (GtkWidget         *widget,
1081                 GtkTargetList     *targets,
1082                 GdkDragAction      actions,
1083                 gint               button,
1084                 GdkEvent          *event)
1085 {
1086   g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
1087   g_return_val_if_fail (GTK_WIDGET_REALIZED (widget), NULL);
1088   g_return_val_if_fail (targets != NULL, NULL);
1089
1090   return gtk_drag_begin_internal (widget, NULL, targets,
1091                                   actions, button, event);
1092 }
1093
1094
1095 static gboolean
1096 gtk_drag_source_event_cb (GtkWidget      *widget,
1097                           GdkEvent       *event,
1098                           gpointer        data)
1099 {
1100   GtkDragSourceSite *site;
1101   gboolean retval = FALSE;
1102   site = (GtkDragSourceSite *)data;
1103
1104   switch (event->type)
1105     {
1106     case GDK_BUTTON_PRESS:
1107       if ((GDK_BUTTON1_MASK << (event->button.button - 1)) & site->start_button_mask)
1108         {
1109           site->state |= (GDK_BUTTON1_MASK << (event->button.button - 1));
1110           site->x = event->button.x;
1111           site->y = event->button.y;
1112         }
1113       break;
1114
1115     case GDK_BUTTON_RELEASE:
1116       if ((GDK_BUTTON1_MASK << (event->button.button - 1)) & site->start_button_mask)
1117         site->state &= ~(GDK_BUTTON1_MASK << (event->button.button - 1));
1118       break;
1119
1120     case GDK_MOTION_NOTIFY:
1121       if (site->state & event->motion.state & site->start_button_mask)
1122         {
1123           /* FIXME: This is really broken and can leave us
1124            * with a stuck grab
1125            */
1126           int i;
1127           for (i=1; i<6; i++)
1128             {
1129               if (site->state & event->motion.state &
1130                   GDK_BUTTON1_MASK << (i - 1))
1131                 break;
1132             }
1133
1134           if (gtk_drag_check_threshold (widget, site->x, site->y,
1135                                         event->motion.x, event->motion.y))
1136             {
1137               site->state = 0;
1138               gtk_drag_begin_internal (widget, site, site->target_list,
1139                                        site->actions,
1140                                        i, event);
1141
1142               retval = TRUE;
1143             }
1144         }
1145       break;
1146
1147     default:                    /* hit for 2/3BUTTON_PRESS */
1148       break;
1149     }
1150
1151   return retval;
1152 }
1153
1154 void
1155 gtk_drag_source_set (GtkWidget            *widget,
1156                      GdkModifierType       start_button_mask,
1157                      const GtkTargetEntry *targets,
1158                      gint                  n_targets,
1159                      GdkDragAction         actions)
1160 {
1161   GtkDragSourceSite *site;
1162
1163   g_return_if_fail (GTK_IS_WIDGET (widget));
1164
1165   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1166
1167   gtk_widget_add_events (widget,
1168                          gtk_widget_get_events (widget) |
1169                          GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
1170                          GDK_BUTTON_MOTION_MASK);
1171
1172   if (site)
1173     {
1174       if (site->target_list)
1175         gtk_target_list_unref (site->target_list);
1176     }
1177   else
1178     {
1179       site = g_new0 (GtkDragSourceSite, 1);
1180
1181       site->icon_type = GTK_IMAGE_EMPTY;
1182
1183       g_signal_connect (widget, "button_press_event",
1184                         G_CALLBACK (gtk_drag_source_event_cb),
1185                         site);
1186       g_signal_connect (widget, "button_release_event",
1187                         G_CALLBACK (gtk_drag_source_event_cb),
1188                         site);
1189       g_signal_connect (widget, "motion_notify_event",
1190                         G_CALLBACK (gtk_drag_source_event_cb),
1191                         site);
1192
1193       g_object_set_data_full (G_OBJECT (widget),
1194                               I_("gtk-site-data"),
1195                               site, gtk_drag_source_site_destroy);
1196     }
1197
1198   site->start_button_mask = start_button_mask;
1199
1200   site->target_list = gtk_target_list_new (targets, n_targets);
1201
1202   site->actions = actions;
1203 }
1204
1205 /*************************************************************
1206  * gtk_drag_source_unset
1207  *     Unregister this widget as a drag source.
1208  *   arguments:
1209  *     widget:
1210  *   results:
1211  *************************************************************/
1212
1213 void
1214 gtk_drag_source_unset (GtkWidget *widget)
1215 {
1216   GtkDragSourceSite *site;
1217
1218   g_return_if_fail (GTK_IS_WIDGET (widget));
1219
1220   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1221
1222   if (site)
1223     {
1224       g_signal_handlers_disconnect_by_func (widget,
1225                                             gtk_drag_source_event_cb,
1226                                             site);
1227       g_object_set_data (G_OBJECT (widget), I_("gtk-site-data"), NULL);
1228     }
1229 }
1230
1231 GtkTargetList *
1232 gtk_drag_source_get_target_list (GtkWidget *widget)
1233 {
1234   GtkDragSourceSite *site;
1235
1236   g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
1237
1238   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1239
1240   return site ? site->target_list : NULL;
1241
1242 }
1243
1244 void
1245 gtk_drag_source_set_target_list (GtkWidget     *widget,
1246                                  GtkTargetList *target_list)
1247 {
1248   GtkDragSourceSite *site;
1249
1250   g_return_if_fail (GTK_IS_WIDGET (widget));
1251
1252   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1253   if (site == NULL)
1254     {
1255       g_warning ("gtk_drag_source_set_target_list() requires the widget "
1256                  "to already be a drag source.");
1257       return;
1258     }
1259
1260   if (target_list)
1261     gtk_target_list_ref (target_list);
1262
1263   if (site->target_list)
1264     gtk_target_list_unref (site->target_list);
1265
1266   site->target_list = target_list;
1267 }
1268
1269 /**
1270  * gtk_drag_source_add_text_targets:
1271  * @widget: a #GtkWidget that's is a drag source
1272  *
1273  * Add the text targets supported by #GtkSelection to
1274  * the target list of the drag source.  The targets
1275  * are added with @info = 0. If you need another value,
1276  * use gtk_target_list_add_text_targets() and
1277  * gtk_drag_source_set_target_list().
1278  *
1279  * Since: 2.6
1280  **/
1281 void
1282 gtk_drag_source_add_text_targets (GtkWidget *widget)
1283 {
1284   GtkTargetList *target_list;
1285
1286   target_list = gtk_drag_source_get_target_list (widget);
1287   if (target_list)
1288     gtk_target_list_ref (target_list);
1289   else
1290     target_list = gtk_target_list_new (NULL, 0);
1291   gtk_target_list_add_text_targets (target_list, 0);
1292   gtk_drag_source_set_target_list (widget, target_list);
1293   gtk_target_list_unref (target_list);
1294 }
1295
1296 void
1297 gtk_drag_source_add_image_targets (GtkWidget *widget)
1298 {
1299   GtkTargetList *target_list;
1300
1301   target_list = gtk_drag_source_get_target_list (widget);
1302   if (target_list)
1303     gtk_target_list_ref (target_list);
1304   else
1305     target_list = gtk_target_list_new (NULL, 0);
1306   gtk_target_list_add_image_targets (target_list, 0, TRUE);
1307   gtk_drag_source_set_target_list (widget, target_list);
1308   gtk_target_list_unref (target_list);
1309 }
1310
1311 void
1312 gtk_drag_source_add_uri_targets (GtkWidget *widget)
1313 {
1314   GtkTargetList *target_list;
1315
1316   target_list = gtk_drag_source_get_target_list (widget);
1317   if (target_list)
1318     gtk_target_list_ref (target_list);
1319   else
1320     target_list = gtk_target_list_new (NULL, 0);
1321   gtk_target_list_add_uri_targets (target_list, 0);
1322   gtk_drag_source_set_target_list (widget, target_list);
1323   gtk_target_list_unref (target_list);
1324 }
1325
1326 static void
1327 gtk_drag_source_unset_icon (GtkDragSourceSite *site)
1328 {
1329   switch (site->icon_type)
1330     {
1331     case GTK_IMAGE_EMPTY:
1332       break;
1333     case GTK_IMAGE_PIXMAP:
1334       if (site->icon_data.pixmap.pixmap)
1335         g_object_unref (site->icon_data.pixmap.pixmap);
1336       if (site->icon_mask)
1337         g_object_unref (site->icon_mask);
1338       break;
1339     case GTK_IMAGE_PIXBUF:
1340       g_object_unref (site->icon_data.pixbuf.pixbuf);
1341       break;
1342     case GTK_IMAGE_STOCK:
1343       g_free (site->icon_data.stock.stock_id);
1344       break;
1345     case GTK_IMAGE_ICON_NAME:
1346       g_free (site->icon_data.name.icon_name);
1347       break;
1348     default:
1349       g_assert_not_reached();
1350       break;
1351     }
1352   site->icon_type = GTK_IMAGE_EMPTY;
1353
1354   if (site->colormap)
1355     g_object_unref (site->colormap);
1356   site->colormap = NULL;
1357 }
1358
1359 static void
1360 gtk_drag_source_site_destroy (gpointer data)
1361 {
1362   GtkDragSourceSite *site = data;
1363
1364   if (site->target_list)
1365     gtk_target_list_unref (site->target_list);
1366
1367   gtk_drag_source_unset_icon (site);
1368   g_free (site);
1369 }
1370
1371 void
1372 gtk_drag_source_set_icon (GtkWidget     *widget,
1373                           GdkColormap   *colormap,
1374                           GdkPixmap     *pixmap,
1375                           GdkBitmap     *mask)
1376 {
1377   GtkDragSourceSite *site;
1378
1379   g_return_if_fail (GTK_IS_WIDGET (widget));
1380   g_return_if_fail (GDK_IS_COLORMAP (colormap));
1381   g_return_if_fail (GDK_IS_PIXMAP (pixmap));
1382   g_return_if_fail (!mask || GDK_IS_PIXMAP (mask));
1383
1384   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1385   g_return_if_fail (site != NULL);
1386
1387   g_object_ref (colormap);
1388   g_object_ref (pixmap);
1389   if (mask)
1390     g_object_ref (mask);
1391
1392   gtk_drag_source_unset_icon (site);
1393
1394   site->icon_type = GTK_IMAGE_PIXMAP;
1395
1396   site->icon_data.pixmap.pixmap = pixmap;
1397   site->icon_mask = mask;
1398   site->colormap = colormap;
1399 }
1400
1401 void
1402 gtk_drag_source_set_icon_pixbuf (GtkWidget   *widget,
1403                                  GdkPixbuf   *pixbuf)
1404 {
1405   GtkDragSourceSite *site;
1406
1407   g_return_if_fail (GTK_IS_WIDGET (widget));
1408   g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
1409
1410   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1411   g_return_if_fail (site != NULL);
1412   g_object_ref (pixbuf);
1413
1414   gtk_drag_source_unset_icon (site);
1415
1416   site->icon_type = GTK_IMAGE_PIXBUF;
1417   site->icon_data.pixbuf.pixbuf = pixbuf;
1418 }
1419
1420 /**
1421  * gtk_drag_source_set_icon_stock:
1422  * @widget: a #GtkWidget
1423  * @stock_id: the ID of the stock icon to use
1424  *
1425  * Sets the icon that will be used for drags from a particular source
1426  * to a stock icon.
1427  **/
1428 void
1429 gtk_drag_source_set_icon_stock (GtkWidget   *widget,
1430                                 const gchar *stock_id)
1431 {
1432   GtkDragSourceSite *site;
1433
1434   g_return_if_fail (GTK_IS_WIDGET (widget));
1435   g_return_if_fail (stock_id != NULL);
1436
1437   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1438   g_return_if_fail (site != NULL);
1439
1440   gtk_drag_source_unset_icon (site);
1441
1442   site->icon_type = GTK_IMAGE_STOCK;
1443   site->icon_data.stock.stock_id = g_strdup (stock_id);
1444 }
1445
1446 /**
1447  * gtk_drag_source_set_icon_name:
1448  * @widget: a #GtkWidget
1449  * @icon_name: name of icon to use
1450  *
1451  * Sets the icon that will be used for drags from a particular source
1452  * to a themed icon. See the docs for #GtkIconTheme for more details.
1453  *
1454  * Since: 2.8
1455  **/
1456 void
1457 gtk_drag_source_set_icon_name (GtkWidget   *widget,
1458                                const gchar *icon_name)
1459 {
1460   GtkDragSourceSite *site;
1461
1462   g_return_if_fail (GTK_IS_WIDGET (widget));
1463   g_return_if_fail (icon_name != NULL);
1464
1465   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1466   g_return_if_fail (site != NULL);
1467
1468   gtk_drag_source_unset_icon (site);
1469
1470   site->icon_type = GTK_IMAGE_ICON_NAME;
1471   site->icon_data.name.icon_name = g_strdup (icon_name);
1472 }
1473
1474
1475 /**
1476  * gtk_drag_set_icon_widget:
1477  * @context: the context for a drag. (This must be called
1478           with a  context for the source side of a drag)
1479  * @widget: a toplevel window to use as an icon.
1480  * @hot_x: the X offset within @widget of the hotspot.
1481  * @hot_y: the Y offset within @widget of the hotspot.
1482  *
1483  * Changes the icon for a widget to a given widget. GTK+
1484  * will not destroy the icon, so if you don't want
1485  * it to persist, you should connect to the "drag_end"
1486  * signal and destroy it yourself.
1487  **/
1488 void
1489 gtk_drag_set_icon_widget (GdkDragContext    *context,
1490                           GtkWidget         *widget,
1491                           gint               hot_x,
1492                           gint               hot_y)
1493 {
1494   g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
1495   g_return_if_fail (context->is_source);
1496   g_return_if_fail (GTK_IS_WIDGET (widget));
1497
1498   g_warning ("gtk_drag_set_icon_widget is not supported on Mac OS X");
1499 }
1500
1501 static void
1502 set_icon_stock_pixbuf (GdkDragContext    *context,
1503                        const gchar       *stock_id,
1504                        GdkPixbuf         *pixbuf,
1505                        gint               hot_x,
1506                        gint               hot_y)
1507 {
1508   GtkDragSourceInfo *info;
1509
1510   info = gtk_drag_get_source_info (context, FALSE);
1511
1512   if (stock_id)
1513     {
1514       pixbuf = gtk_widget_render_icon (info->widget, stock_id,
1515                                        GTK_ICON_SIZE_DND, NULL);
1516
1517       if (!pixbuf)
1518         {
1519           g_warning ("Cannot load drag icon from stock_id %s", stock_id);
1520           return;
1521         }
1522     }
1523   else
1524     g_object_ref (pixbuf);
1525
1526   if (info->icon_pixbuf)
1527     g_object_unref (info->icon_pixbuf);
1528   info->icon_pixbuf = pixbuf;
1529   info->hot_x = hot_x;
1530   info->hot_y = hot_y;
1531 }
1532
1533 /**
1534  * gtk_drag_set_icon_pixbuf:
1535  * @context: the context for a drag. (This must be called
1536  *            with a  context for the source side of a drag)
1537  * @pixbuf: the #GdkPixbuf to use as the drag icon.
1538  * @hot_x: the X offset within @widget of the hotspot.
1539  * @hot_y: the Y offset within @widget of the hotspot.
1540  *
1541  * Sets @pixbuf as the icon for a given drag.
1542  **/
1543 void
1544 gtk_drag_set_icon_pixbuf  (GdkDragContext *context,
1545                            GdkPixbuf      *pixbuf,
1546                            gint            hot_x,
1547                            gint            hot_y)
1548 {
1549   g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
1550   g_return_if_fail (context->is_source);
1551   g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
1552
1553   set_icon_stock_pixbuf (context, NULL, pixbuf, hot_x, hot_y);
1554 }
1555
1556 /**
1557  * gtk_drag_set_icon_stock:
1558  * @context: the context for a drag. (This must be called
1559  *            with a  context for the source side of a drag)
1560  * @stock_id: the ID of the stock icon to use for the drag.
1561  * @hot_x: the X offset within the icon of the hotspot.
1562  * @hot_y: the Y offset within the icon of the hotspot.
1563  *
1564  * Sets the icon for a given drag from a stock ID.
1565  **/
1566 void
1567 gtk_drag_set_icon_stock  (GdkDragContext *context,
1568                           const gchar    *stock_id,
1569                           gint            hot_x,
1570                           gint            hot_y)
1571 {
1572
1573   g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
1574   g_return_if_fail (context->is_source);
1575   g_return_if_fail (stock_id != NULL);
1576
1577   set_icon_stock_pixbuf (context, stock_id, NULL, hot_x, hot_y);
1578 }
1579
1580 /**
1581  * gtk_drag_set_icon_pixmap:
1582  * @context: the context for a drag. (This must be called
1583  *            with a  context for the source side of a drag)
1584  * @colormap: the colormap of the icon
1585  * @pixmap: the image data for the icon
1586  * @mask: the transparency mask for the icon
1587  * @hot_x: the X offset within @pixmap of the hotspot.
1588  * @hot_y: the Y offset within @pixmap of the hotspot.
1589  *
1590  * Sets @pixmap as the icon for a given drag. GTK+ retains
1591  * references for the arguments, and will release them when
1592  * they are no longer needed. In general, gtk_drag_set_icon_pixbuf()
1593  * will be more convenient to use.
1594  **/
1595 void
1596 gtk_drag_set_icon_pixmap (GdkDragContext    *context,
1597                           GdkColormap       *colormap,
1598                           GdkPixmap         *pixmap,
1599                           GdkBitmap         *mask,
1600                           gint               hot_x,
1601                           gint               hot_y)
1602 {
1603   g_warning ("gtk_drag_set_icon_pixmap is not supported on Mac OS X");
1604 }
1605
1606 /**
1607  * gtk_drag_set_icon_name:
1608  * @context: the context for a drag. (This must be called
1609  *            with a context for the source side of a drag)
1610  * @icon_name: name of icon to use
1611  * @hot_x: the X offset of the hotspot within the icon
1612  * @hot_y: the Y offset of the hotspot within the icon
1613  *
1614  * Sets the icon for a given drag from a named themed icon. See
1615  * the docs for #GtkIconTheme for more details. Note that the
1616  * size of the icon depends on the icon theme (the icon is
1617  * loaded at the symbolic size #GTK_ICON_SIZE_DND), thus
1618  * @hot_x and @hot_y have to be used with care.
1619  *
1620  * Since: 2.8
1621  **/
1622 void
1623 gtk_drag_set_icon_name (GdkDragContext *context,
1624                         const gchar    *icon_name,
1625                         gint            hot_x,
1626                         gint            hot_y)
1627 {
1628   GdkScreen *screen;
1629   GtkSettings *settings;
1630   GtkIconTheme *icon_theme;
1631   GdkPixbuf *pixbuf;
1632   gint width, height, icon_size;
1633
1634   g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
1635   g_return_if_fail (context->is_source);
1636   g_return_if_fail (icon_name != NULL);
1637
1638   screen = gdk_drawable_get_screen (context->source_window);
1639   g_return_if_fail (screen != NULL);
1640
1641   settings = gtk_settings_get_for_screen (screen);
1642   if (gtk_icon_size_lookup_for_settings (settings,
1643                                          GTK_ICON_SIZE_DND,
1644                                          &width, &height))
1645     icon_size = MAX (width, height);
1646   else
1647     icon_size = 32; /* default value for GTK_ICON_SIZE_DND */
1648
1649   icon_theme = gtk_icon_theme_get_for_screen (screen);
1650
1651   pixbuf = gtk_icon_theme_load_icon (icon_theme, icon_name,
1652                                      icon_size, 0, NULL);
1653   if (pixbuf)
1654     set_icon_stock_pixbuf (context, NULL, pixbuf, hot_x, hot_y);
1655   else
1656     g_warning ("Cannot load drag icon from icon name %s", icon_name);
1657 }
1658
1659 /**
1660  * gtk_drag_set_icon_default:
1661  * @context: the context for a drag. (This must be called
1662              with a  context for the source side of a drag)
1663  *
1664  * Sets the icon for a particular drag to the default
1665  * icon.
1666  **/
1667 void
1668 gtk_drag_set_icon_default (GdkDragContext    *context)
1669 {
1670   g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
1671   g_return_if_fail (context->is_source);
1672
1673   gtk_drag_set_icon_stock (context, GTK_STOCK_DND, -2, -2);
1674 }
1675
1676 void
1677 gtk_drag_set_default_icon (GdkColormap   *colormap,
1678                            GdkPixmap     *pixmap,
1679                            GdkBitmap     *mask,
1680                            gint           hot_x,
1681                            gint           hot_y)
1682 {
1683   g_warning ("gtk_drag_set_default_icon is not supported on Mac OS X.");
1684 }
1685
1686 static void
1687 gtk_drag_source_info_destroy (GtkDragSourceInfo *info)
1688 {
1689   if (info->icon_pixbuf)
1690     g_object_unref (info->icon_pixbuf);
1691
1692   g_signal_emit_by_name (info->widget, "drag_end",
1693                          info->context);
1694
1695   if (info->widget)
1696     g_object_unref (info->widget);
1697
1698   gtk_target_list_unref (info->target_list);
1699
1700   gtk_drag_clear_source_info (info->context);
1701   g_object_unref (info->context);
1702
1703   g_free (info);
1704 }
1705
1706 static void
1707 gtk_drag_drop_finished (GtkDragSourceInfo *info)
1708 {
1709   gtk_drag_source_info_destroy (info);
1710 }
1711
1712 /*************************************************************
1713  * _gtk_drag_source_handle_event:
1714  *     Called from widget event handling code on Drag events
1715  *     for drag sources.
1716  *
1717  *   arguments:
1718  *     toplevel: Toplevel widget that received the event
1719  *     event:
1720  *   results:
1721  *************************************************************/
1722
1723 void
1724 _gtk_drag_source_handle_event (GtkWidget *widget,
1725                                GdkEvent  *event)
1726 {
1727   GtkDragSourceInfo *info;
1728   GdkDragContext *context;
1729
1730   g_return_if_fail (widget != NULL);
1731   g_return_if_fail (event != NULL);
1732
1733   context = event->dnd.context;
1734   info = gtk_drag_get_source_info (context, FALSE);
1735   if (!info)
1736     return;
1737
1738   switch (event->type)
1739     {
1740     case GDK_DROP_FINISHED:
1741       gtk_drag_drop_finished (info);
1742       break;
1743     default:
1744       g_assert_not_reached ();
1745     }
1746 }
1747
1748
1749 gboolean
1750 gtk_drag_check_threshold (GtkWidget *widget,
1751                           gint       start_x,
1752                           gint       start_y,
1753                           gint       current_x,
1754                           gint       current_y)
1755 {
1756   gint drag_threshold;
1757
1758   g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
1759
1760   g_object_get (gtk_widget_get_settings (widget),
1761                 "gtk-dnd-drag-threshold", &drag_threshold,
1762                 NULL);
1763
1764   return (ABS (current_x - start_x) > drag_threshold ||
1765           ABS (current_y - start_y) > drag_threshold);
1766 }
1767
1768 #define __GTK_DND_C__
1769 #include "gtkaliasdef.c"