gtkdnd-quartz.c 54.2 KB
Newer Older
Cody Russell's avatar
Cody Russell committed
1
/* GTK - The GIMP Toolkit
Anders Carlsson's avatar
Anders Carlsson committed
2 3 4 5 6 7 8 9 10 11 12 13 14
 * Copyright (C) 1995-1999 Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
Javier Jardón's avatar
Javier Jardón committed
15
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
Anders Carlsson's avatar
Anders Carlsson committed
16 17 18 19 20 21 22 23 24
 */

/*
 * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
 * file for a list of people on the GTK+ Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 
 */

25
#include "config.h"
Anders Carlsson's avatar
Anders Carlsson committed
26 27 28 29

#include <stdlib.h>
#include <string.h>

30
#include "gdk/gdk.h"
Anders Carlsson's avatar
Anders Carlsson committed
31 32 33 34

#include "gtkdnd.h"
#include "gtkiconfactory.h"
#include "gtkicontheme.h"
35
#include "gtkimageprivate.h"
Anders Carlsson's avatar
Anders Carlsson committed
36 37 38 39 40 41 42
#include "gtkinvisible.h"
#include "gtkmain.h"
#include "gtkstock.h"
#include "gtkwindow.h"
#include "gtkintl.h"
#include "gtkquartz.h"
#include "gdk/quartz/gdkquartz.h"
43
#include "gtkselectionprivate.h"
Anders Carlsson's avatar
Anders Carlsson committed
44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

typedef struct _GtkDragSourceSite GtkDragSourceSite;
typedef struct _GtkDragSourceInfo GtkDragSourceInfo;
typedef struct _GtkDragDestSite GtkDragDestSite;
typedef struct _GtkDragDestInfo GtkDragDestInfo;
typedef struct _GtkDragFindData GtkDragFindData;

static void     gtk_drag_find_widget            (GtkWidget        *widget,
						 GtkDragFindData  *data);
static void     gtk_drag_dest_site_destroy      (gpointer          data);
static void     gtk_drag_dest_leave             (GtkWidget        *widget,
						 GdkDragContext   *context,
						 guint             time);
static GtkDragDestInfo *gtk_drag_get_dest_info  (GdkDragContext   *context,
						 gboolean          create);
static void gtk_drag_source_site_destroy        (gpointer           data);

61 62 63 64 65
static GtkDragSourceInfo *gtk_drag_get_source_info (GdkDragContext *context,
						    gboolean        create);

extern GdkDragContext *gdk_quartz_drag_source_context (); /* gdk/quartz/gdkdnd-quartz.c */

Anders Carlsson's avatar
Anders Carlsson committed
66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87
struct _GtkDragSourceSite 
{
  GdkModifierType    start_button_mask;
  GtkTargetList     *target_list;        /* Targets for drag data */
  GdkDragAction      actions;            /* Possible actions */

  /* Drag icon */
  GtkImageType icon_type;
  union
  {
    GtkImagePixbufData pixbuf;
    GtkImageStockData stock;
    GtkImageIconNameData name;
  } icon_data;

  /* Stored button press information to detect drag beginning */
  gint               state;
  gint               x, y;
};

struct _GtkDragSourceInfo 
{
88
  GtkWidget         *source_widget;
Anders Carlsson's avatar
Anders Carlsson committed
89 90 91 92
  GtkWidget         *widget;
  GtkTargetList     *target_list; /* Targets for drag data */
  GdkDragAction      possible_actions; /* Actions allowed by source */
  GdkDragContext    *context;	  /* drag context */
93
  NSEvent           *nsevent;     /* what started it */
Anders Carlsson's avatar
Anders Carlsson committed
94 95
  gint hot_x, hot_y;		  /* Hot spot for drag */
  GdkPixbuf         *icon_pixbuf;
96 97
  gboolean           success;
  gboolean           delete;
Anders Carlsson's avatar
Anders Carlsson committed
98 99 100 101 102 103 104 105
};

struct _GtkDragDestSite 
{
  GtkDestDefaults    flags;
  GtkTargetList     *target_list;
  GdkDragAction      actions;
  guint              have_drag : 1;
106
  guint              track_motion : 1;
Anders Carlsson's avatar
Anders Carlsson committed
107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144
};

struct _GtkDragDestInfo 
{
  GtkWidget         *widget;	   /* Widget in which drag is in */
  GdkDragContext    *context;	   /* Drag context */
  guint              dropped : 1;     /* Set after we receive a drop */
  gint               drop_x, drop_y; /* Position of drop */
};

struct _GtkDragFindData 
{
  gint x;
  gint y;
  GdkDragContext *context;
  GtkDragDestInfo *info;
  gboolean found;
  gboolean toplevel;
  gboolean (*callback) (GtkWidget *widget, GdkDragContext *context,
			gint x, gint y, guint32 time);
  guint32 time;
};


@interface GtkDragSourceOwner : NSObject {
  GtkDragSourceInfo *info;
}

@end

@implementation GtkDragSourceOwner
-(void)pasteboard:(NSPasteboard *)sender provideDataForType:(NSString *)type
{
  guint target_info;
  GtkSelectionData selection_data;

  selection_data.selection = GDK_NONE;
  selection_data.data = NULL;
145
  selection_data.length = -1;
Anders Carlsson's avatar
Anders Carlsson committed
146
  selection_data.target = _gtk_quartz_pasteboard_type_to_atom (type);
147
  selection_data.display = gdk_display_get_default ();
Anders Carlsson's avatar
Anders Carlsson committed
148 149 150 151 152

  if (gtk_target_list_find (info->target_list, 
			    selection_data.target, 
			    &target_info)) 
    {
153
      g_signal_emit_by_name (info->widget, "drag-data-get",
Anders Carlsson's avatar
Anders Carlsson committed
154 155 156 157 158
			     info->context,
			     &selection_data,
			     target_info,
			     time);

159 160
      if (selection_data.length >= 0)
        _gtk_quartz_set_selection_data_for_pasteboard (sender, &selection_data);
Anders Carlsson's avatar
Anders Carlsson committed
161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179
      
      g_free (selection_data.data);
    }
}

- (id)initWithInfo:(GtkDragSourceInfo *)anInfo
{
  self = [super init];

  if (self) 
    {
      info = anInfo;
    }

  return self;
}

@end

180 181 182 183 184 185 186 187 188 189
/**
 * gtk_drag_get_data: (method)
 * @widget: the widget that will receive the
 *   #GtkWidget::drag-data-received signal.
 * @context: the drag context
 * @target: the target (form of the data) to retrieve.
 * @time_: a timestamp for retrieving the data. This will
 *   generally be the time received in a #GtkWidget::drag-motion"
 *   or #GtkWidget::drag-drop" signal.
 */
Anders Carlsson's avatar
Anders Carlsson committed
190 191 192 193 194 195
void 
gtk_drag_get_data (GtkWidget      *widget,
		   GdkDragContext *context,
		   GdkAtom         target,
		   guint32         time)
{
196 197
  id <NSDraggingInfo> dragging_info;
  NSPasteboard *pasteboard;
Anders Carlsson's avatar
Anders Carlsson committed
198 199 200 201
  GtkSelectionData *selection_data;
  GtkDragDestInfo *info;
  GtkDragDestSite *site;

202 203 204
  dragging_info = gdk_quartz_drag_context_get_dragging_info_libgtk_only (context);
  pasteboard = [dragging_info draggingPasteboard];

Anders Carlsson's avatar
Anders Carlsson committed
205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221
  info = gtk_drag_get_dest_info (context, FALSE);
  site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");

  selection_data = _gtk_quartz_get_selection_data_from_pasteboard (pasteboard,
								   target, 0);

  if (site && site->target_list)
    {
      guint target_info;
      
      if (gtk_target_list_find (site->target_list, 
				selection_data->target,
				&target_info))
	{
	  if (!(site->flags & GTK_DEST_DEFAULT_DROP) ||
	      selection_data->length >= 0)
	    g_signal_emit_by_name (widget,
222
				   "drag-data-received",
Anders Carlsson's avatar
Anders Carlsson committed
223 224 225 226 227 228 229 230
				   context, info->drop_x, info->drop_y,
				   selection_data,
				   target_info, time);
	}
    }
  else
    {
      g_signal_emit_by_name (widget,
231
			     "drag-data-received",
Anders Carlsson's avatar
Anders Carlsson committed
232 233 234 235 236 237 238 239 240
			     context, info->drop_x, info->drop_y,
			     selection_data,
			     0, time);
    }
  
  if (site && site->flags & GTK_DEST_DEFAULT_DROP)
    {
      gtk_drag_finish (context, 
		       (selection_data->length >= 0),
241
		       (gdk_drag_context_get_selected_action (context) == GDK_ACTION_MOVE),
Anders Carlsson's avatar
Anders Carlsson committed
242 243 244 245
		       time);
    }      
}

246 247 248 249 250 251 252 253
/**
 * gtk_drag_finish: (method)
 * @context: the drag context.
 * @success: a flag indicating whether the drop was successful
 * @del: a flag indicating whether the source should delete the
 *   original data. (This should be %TRUE for a move)
 * @time_: the timestamp from the #GtkWidget::drag-drop signal.
 */
Anders Carlsson's avatar
Anders Carlsson committed
254 255 256 257 258 259
void 
gtk_drag_finish (GdkDragContext *context,
		 gboolean        success,
		 gboolean        del,
		 guint32         time)
{
260 261 262 263 264 265 266 267 268 269 270 271
  GtkDragSourceInfo *info;
  GdkDragContext* source_context = gdk_quartz_drag_source_context ();

  if (source_context)
    {
      info = gtk_drag_get_source_info (source_context, FALSE);
      if (info)
        {
          info->success = success;
          info->delete = del;
        }
    }
Anders Carlsson's avatar
Anders Carlsson committed
272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311
}

static void
gtk_drag_dest_info_destroy (gpointer data)
{
  GtkDragDestInfo *info = data;

  g_free (info);
}

static GtkDragDestInfo *
gtk_drag_get_dest_info (GdkDragContext *context,
			gboolean        create)
{
  GtkDragDestInfo *info;
  static GQuark info_quark = 0;
  if (!info_quark)
    info_quark = g_quark_from_static_string ("gtk-dest-info");
  
  info = g_object_get_qdata (G_OBJECT (context), info_quark);
  if (!info && create)
    {
      info = g_new (GtkDragDestInfo, 1);
      info->widget = NULL;
      info->context = context;
      info->dropped = FALSE;
      g_object_set_qdata_full (G_OBJECT (context), info_quark,
			       info, gtk_drag_dest_info_destroy);
    }

  return info;
}

static GQuark dest_info_quark = 0;

static GtkDragSourceInfo *
gtk_drag_get_source_info (GdkDragContext *context,
			  gboolean        create)
{
  GtkDragSourceInfo *info;
312

Anders Carlsson's avatar
Anders Carlsson committed
313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332
  if (!dest_info_quark)
    dest_info_quark = g_quark_from_static_string ("gtk-source-info");
  
  info = g_object_get_qdata (G_OBJECT (context), dest_info_quark);
  if (!info && create)
    {
      info = g_new0 (GtkDragSourceInfo, 1);
      info->context = context;
      g_object_set_qdata (G_OBJECT (context), dest_info_quark, info);
    }

  return info;
}

static void
gtk_drag_clear_source_info (GdkDragContext *context)
{
  g_object_set_qdata (G_OBJECT (context), dest_info_quark, NULL);
}

333 334 335 336
/**
 * gtk_drag_get_source_widget: (method)
 * @context: a (destination side) drag context
 */
337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352
GtkWidget *
gtk_drag_get_source_widget (GdkDragContext *context)
{
  GtkDragSourceInfo *info;
  GdkDragContext* real_source_context = gdk_quartz_drag_source_context();

  if (!real_source_context)
    return NULL;

  info = gtk_drag_get_source_info (real_source_context, FALSE);
  if (!info)
     return NULL;

  return info->source_widget;
}

Anders Carlsson's avatar
Anders Carlsson committed
353
/*************************************************************
354
 * gtk_drag_highlight_draw:
Anders Carlsson's avatar
Anders Carlsson committed
355 356 357 358 359 360 361 362 363
 *     Callback for expose_event for highlighted widgets.
 *   arguments:
 *     widget:
 *     event:
 *     data:
 *   results:
 *************************************************************/

static gboolean
364 365 366
gtk_drag_highlight_draw (GtkWidget *widget,
                         cairo_t   *cr,
			 gpointer   data)
Anders Carlsson's avatar
Anders Carlsson committed
367
{
368 369
  int width = gtk_widget_get_allocated_width (widget);
  int height = gtk_widget_get_allocated_height (widget);
370
  GtkStyleContext *context = gtk_widget_get_style_context (widget);
371

372 373 374 375 376 377
  gtk_style_context_save (context);
  gtk_style_context_add_class (context, GTK_STYLE_CLASS_DND);

  gtk_render_frame (context, cr, 0, 0, width, height);

  gtk_style_context_restore (context);
378 379 380 381 382 383 384 385

  cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
  cairo_set_line_width (cr, 1.0);
  cairo_rectangle (cr,
                   0.5, 0.5,
                   width - 1, height - 1);
  cairo_stroke (cr);
 
Anders Carlsson's avatar
Anders Carlsson committed
386 387 388
  return FALSE;
}

389 390 391 392
/**
 * gtk_drag_highlight: (method)
 * @widget: a widget to highlight
 */
Anders Carlsson's avatar
Anders Carlsson committed
393 394 395 396 397
void 
gtk_drag_highlight (GtkWidget  *widget)
{
  g_return_if_fail (GTK_IS_WIDGET (widget));

398 399
  g_signal_connect_after (widget, "draw",
			  G_CALLBACK (gtk_drag_highlight_draw),
Anders Carlsson's avatar
Anders Carlsson committed
400 401 402 403 404
			  NULL);

  gtk_widget_queue_draw (widget);
}

405 406 407 408
/**
 * gtk_drag_unhighlight: (method)
 * @widget: a widget to remove the highlight from.
 */
Anders Carlsson's avatar
Anders Carlsson committed
409 410 411 412 413 414
void 
gtk_drag_unhighlight (GtkWidget *widget)
{
  g_return_if_fail (GTK_IS_WIDGET (widget));

  g_signal_handlers_disconnect_by_func (widget,
415
					gtk_drag_highlight_draw,
Anders Carlsson's avatar
Anders Carlsson committed
416 417 418 419 420 421 422 423 424
					NULL);
  
  gtk_widget_queue_draw (widget);
}

static NSWindow *
get_toplevel_nswindow (GtkWidget *widget)
{
  GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
425
  GdkWindow *window = gtk_widget_get_window (toplevel);
Anders Carlsson's avatar
Anders Carlsson committed
426
  
427 428
  if (gtk_widget_is_toplevel (toplevel) && window)
    return [gdk_quartz_window_get_nsview (window) window];
Anders Carlsson's avatar
Anders Carlsson committed
429 430 431 432 433 434 435 436 437 438
  else
    return NULL;
}

static void
register_types (GtkWidget *widget, GtkDragDestSite *site)
{
  if (site->target_list)
    {
      NSWindow *nswindow = get_toplevel_nswindow (widget);
439
      NSSet *types;
Anders Carlsson's avatar
Anders Carlsson committed
440 441 442 443 444
      NSAutoreleasePool *pool;

      if (!nswindow)
	return;

Richard Hult's avatar
Richard Hult committed
445
      pool = [[NSAutoreleasePool alloc] init];
Anders Carlsson's avatar
Anders Carlsson committed
446 447
      types = _gtk_quartz_target_list_to_pasteboard_types (site->target_list);

448
      [nswindow registerForDraggedTypes:[types allObjects]];
449 450

      [types release];
Anders Carlsson's avatar
Anders Carlsson committed
451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484
      [pool release];
    }
}

static void
gtk_drag_dest_realized (GtkWidget *widget, 
			gpointer   user_data)
{
  GtkDragDestSite *site = user_data;

  register_types (widget, site);
}

static void
gtk_drag_dest_hierarchy_changed (GtkWidget *widget,
				 GtkWidget *previous_toplevel,
				 gpointer   user_data)
{
  GtkDragDestSite *site = user_data;

  register_types (widget, site);
}

static void
gtk_drag_dest_site_destroy (gpointer data)
{
  GtkDragDestSite *site = data;
    
  if (site->target_list)
    gtk_target_list_unref (site->target_list);

  g_free (site);
}

485 486 487 488 489 490 491 492 493 494 495
/**
 * gtk_drag_dest_set: (method)
 * @widget: a #GtkWidget
 * @flags: which types of default drag behavior to use
 * @targets: (allow-none) (array length=n_targets): a pointer to an array of #GtkTargetEntry<!-- -->s
 *     indicating the drop types that this @widget will accept, or %NULL.
 *     Later you can access the list with gtk_drag_dest_get_target_list()
 *     and gtk_drag_dest_find_target().
 * @n_targets: the number of entries in @targets
 * @actions: a bitmask of possible actions for a drop onto this @widget.
 */
Anders Carlsson's avatar
Anders Carlsson committed
496 497 498 499 500 501 502
void 
gtk_drag_dest_set (GtkWidget            *widget,
		   GtkDestDefaults       flags,
		   const GtkTargetEntry *targets,
		   gint                  n_targets,
		   GdkDragAction         actions)
{
503
  GtkDragDestSite *old_site, *site;
Anders Carlsson's avatar
Anders Carlsson committed
504 505 506

  g_return_if_fail (GTK_IS_WIDGET (widget));

507 508
  old_site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");

Anders Carlsson's avatar
Anders Carlsson committed
509 510 511 512 513 514 515 516 517
  site = g_new (GtkDragDestSite, 1);
  site->flags = flags;
  site->have_drag = FALSE;
  if (targets)
    site->target_list = gtk_target_list_new (targets, n_targets);
  else
    site->target_list = NULL;
  site->actions = actions;

518 519 520 521 522
  if (old_site)
    site->track_motion = old_site->track_motion;
  else
    site->track_motion = FALSE;

Paul Davis's avatar
Paul Davis committed
523 524
  gtk_drag_dest_unset (widget);

525
  if (gtk_widget_get_realized (widget))
Anders Carlsson's avatar
Anders Carlsson committed
526 527 528 529
    gtk_drag_dest_realized (widget, site);

  g_signal_connect (widget, "realize",
		    G_CALLBACK (gtk_drag_dest_realized), site);
530
  g_signal_connect (widget, "hierarchy-changed",
Anders Carlsson's avatar
Anders Carlsson committed
531 532 533 534 535 536
		    G_CALLBACK (gtk_drag_dest_hierarchy_changed), site);

  g_object_set_data_full (G_OBJECT (widget), I_("gtk-drag-dest"),
			  site, gtk_drag_dest_site_destroy);
}

537 538 539 540 541 542 543 544 545 546
/**
 * gtk_drag_dest_set_proxy: (method)
 * @widget: a #GtkWidget
 * @proxy_window: the window to which to forward drag events
 * @protocol: the drag protocol which the @proxy_window accepts
 *   (You can use gdk_drag_get_protocol() to determine this)
 * @use_coordinates: If %TRUE, send the same coordinates to the
 *   destination, because it is an embedded
 *   subwindow.
 */
Anders Carlsson's avatar
Anders Carlsson committed
547 548 549 550 551 552 553 554 555
void 
gtk_drag_dest_set_proxy (GtkWidget      *widget,
			 GdkWindow      *proxy_window,
			 GdkDragProtocol protocol,
			 gboolean        use_coordinates)
{
  g_warning ("gtk_drag_dest_set_proxy is not supported on Mac OS X.");
}

556 557 558 559
/**
 * gtk_drag_dest_unset: (method)
 * @widget: a #GtkWidget
 */
Anders Carlsson's avatar
Anders Carlsson committed
560 561 562
void 
gtk_drag_dest_unset (GtkWidget *widget)
{
563 564
  GtkDragDestSite *old_site;

Anders Carlsson's avatar
Anders Carlsson committed
565 566
  g_return_if_fail (GTK_IS_WIDGET (widget));

567 568 569 570 571 572 573 574 575 576 577
  old_site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
  if (old_site)
    {
      g_signal_handlers_disconnect_by_func (widget,
                                            gtk_drag_dest_realized,
                                            old_site);
      g_signal_handlers_disconnect_by_func (widget,
                                            gtk_drag_dest_hierarchy_changed,
                                            old_site);
    }

Anders Carlsson's avatar
Anders Carlsson committed
578 579 580
  g_object_set_data (G_OBJECT (widget), I_("gtk-drag-dest"), NULL);
}

581 582 583 584
/**
 * gtk_drag_dest_get_target_list: (method)
 * @widget: a #GtkWidget
 */
Anders Carlsson's avatar
Anders Carlsson committed
585 586 587 588 589 590 591 592 593 594 595 596
GtkTargetList*
gtk_drag_dest_get_target_list (GtkWidget *widget)
{
  GtkDragDestSite *site;

  g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
  
  site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");

  return site ? site->target_list : NULL;  
}

597 598 599 600 601
/**
 * gtk_drag_dest_set_target_list: (method)
 * @widget: a #GtkWidget that's a drag destination
 * @target_list: (allow-none): list of droppable targets, or %NULL for none
 */
Anders Carlsson's avatar
Anders Carlsson committed
602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629
void
gtk_drag_dest_set_target_list (GtkWidget      *widget,
                               GtkTargetList  *target_list)
{
  GtkDragDestSite *site;

  g_return_if_fail (GTK_IS_WIDGET (widget));
  
  site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
  
  if (!site)
    {
      g_warning ("Can't set a target list on a widget until you've called gtk_drag_dest_set() "
                 "to make the widget into a drag destination");
      return;
    }

  if (target_list)
    gtk_target_list_ref (target_list);
  
  if (site->target_list)
    gtk_target_list_unref (site->target_list);

  site->target_list = target_list;

  register_types (widget, site);
}

630 631 632 633
/**
 * gtk_drag_dest_add_text_targets: (method)
 * @widget: a #GtkWidget that's a drag destination
 */
Anders Carlsson's avatar
Anders Carlsson committed
634 635 636 637 638 639 640 641 642 643 644 645 646 647 648
void
gtk_drag_dest_add_text_targets (GtkWidget *widget)
{
  GtkTargetList *target_list;

  target_list = gtk_drag_dest_get_target_list (widget);
  if (target_list)
    gtk_target_list_ref (target_list);
  else
    target_list = gtk_target_list_new (NULL, 0);
  gtk_target_list_add_text_targets (target_list, 0);
  gtk_drag_dest_set_target_list (widget, target_list);
  gtk_target_list_unref (target_list);
}

649 650 651 652 653

/**
 * gtk_drag_dest_add_image_targets: (method)
 * @widget: a #GtkWidget that's a drag destination
 */
Anders Carlsson's avatar
Anders Carlsson committed
654 655 656 657 658 659 660 661 662 663 664 665 666 667 668
void
gtk_drag_dest_add_image_targets (GtkWidget *widget)
{
  GtkTargetList *target_list;

  target_list = gtk_drag_dest_get_target_list (widget);
  if (target_list)
    gtk_target_list_ref (target_list);
  else
    target_list = gtk_target_list_new (NULL, 0);
  gtk_target_list_add_image_targets (target_list, 0, FALSE);
  gtk_drag_dest_set_target_list (widget, target_list);
  gtk_target_list_unref (target_list);
}

669 670 671 672
/**
 * gtk_drag_dest_add_uri_targets: (method)
 * @widget: a #GtkWidget that's a drag destination
 */
Anders Carlsson's avatar
Anders Carlsson committed
673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706
void
gtk_drag_dest_add_uri_targets (GtkWidget *widget)
{
  GtkTargetList *target_list;

  target_list = gtk_drag_dest_get_target_list (widget);
  if (target_list)
    gtk_target_list_ref (target_list);
  else
    target_list = gtk_target_list_new (NULL, 0);
  gtk_target_list_add_uri_targets (target_list, 0);
  gtk_drag_dest_set_target_list (widget, target_list);
  gtk_target_list_unref (target_list);
}

static void
prepend_and_ref_widget (GtkWidget *widget,
			gpointer   data)
{
  GSList **slist_p = data;

  *slist_p = g_slist_prepend (*slist_p, g_object_ref (widget));
}

static void
gtk_drag_find_widget (GtkWidget       *widget,
		      GtkDragFindData *data)
{
  GtkAllocation new_allocation;
  gint allocation_to_window_x = 0;
  gint allocation_to_window_y = 0;
  gint x_offset = 0;
  gint y_offset = 0;

707
  if (data->found || !gtk_widget_get_mapped (widget) || !gtk_widget_get_sensitive (widget))
Anders Carlsson's avatar
Anders Carlsson committed
708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723
    return;

  /* Note that in the following code, we only count the
   * position as being inside a WINDOW widget if it is inside
   * widget->window; points that are outside of widget->window
   * but within the allocation are not counted. This is consistent
   * with the way we highlight drag targets.
   *
   * data->x,y are relative to widget->parent->window (if
   * widget is not a toplevel, widget->window otherwise).
   * We compute the allocation of widget in the same coordinates,
   * clipping to widget->window, and all intermediate
   * windows. If data->x,y is inside that, then we translate
   * our coordinates to be relative to widget->window and
   * recurse.
   */  
724
  gtk_widget_get_allocation (widget, &new_allocation);
Anders Carlsson's avatar
Anders Carlsson committed
725

726
  if (gtk_widget_get_parent (widget))
Anders Carlsson's avatar
Anders Carlsson committed
727 728
    {
      gint tx, ty;
729 730 731 732 733
      GdkWindow *window = gtk_widget_get_window (widget);
      GdkWindow *parent_window;
      GtkAllocation allocation;

      parent_window = gtk_widget_get_window (gtk_widget_get_parent (widget));
Anders Carlsson's avatar
Anders Carlsson committed
734 735 736 737

      /* Compute the offset from allocation-relative to
       * window-relative coordinates.
       */
738 739 740
      gtk_widget_get_allocation (widget, &allocation);
      allocation_to_window_x = allocation.x;
      allocation_to_window_y = allocation.y;
Anders Carlsson's avatar
Anders Carlsson committed
741

742
      if (gtk_widget_get_has_window (widget))
Anders Carlsson's avatar
Anders Carlsson committed
743 744 745 746 747 748 749 750 751 752 753 754 755
	{
	  /* The allocation is relative to the parent window for
	   * window widgets, not to widget->window.
	   */
          gdk_window_get_position (window, &tx, &ty);
	  
          allocation_to_window_x -= tx;
          allocation_to_window_y -= ty;
	}

      new_allocation.x = 0 + allocation_to_window_x;
      new_allocation.y = 0 + allocation_to_window_y;
      
756
      while (window && window != parent_window)
Anders Carlsson's avatar
Anders Carlsson committed
757 758 759
	{
	  GdkRectangle window_rect = { 0, 0, 0, 0 };
	  
760 761
          window_rect.width = gdk_window_get_width (window);
          window_rect.height = gdk_window_get_height (window);
Anders Carlsson's avatar
Anders Carlsson committed
762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797

	  gdk_rectangle_intersect (&new_allocation, &window_rect, &new_allocation);

	  gdk_window_get_position (window, &tx, &ty);
	  new_allocation.x += tx;
	  x_offset += tx;
	  new_allocation.y += ty;
	  y_offset += ty;
	  
	  window = gdk_window_get_parent (window);
	}

      if (!window)		/* Window and widget heirarchies didn't match. */
	return;
    }

  if (data->toplevel ||
      ((data->x >= new_allocation.x) && (data->y >= new_allocation.y) &&
       (data->x < new_allocation.x + new_allocation.width) && 
       (data->y < new_allocation.y + new_allocation.height)))
    {
      /* First, check if the drag is in a valid drop site in
       * one of our children 
       */
      if (GTK_IS_CONTAINER (widget))
	{
	  GtkDragFindData new_data = *data;
	  GSList *children = NULL;
	  GSList *tmp_list;
	  
	  new_data.x -= x_offset;
	  new_data.y -= y_offset;
	  new_data.found = FALSE;
	  new_data.toplevel = FALSE;
	  
	  /* need to reference children temporarily in case the
798
	   * ::drag-motion/::drag-drop callbacks change the widget hierarchy.
Anders Carlsson's avatar
Anders Carlsson committed
799 800 801 802
	   */
	  gtk_container_forall (GTK_CONTAINER (widget), prepend_and_ref_widget, &children);
	  for (tmp_list = children; tmp_list; tmp_list = tmp_list->next)
	    {
803
	      if (!new_data.found && gtk_widget_is_drawable (tmp_list->data))
Anders Carlsson's avatar
Anders Carlsson committed
804 805 806 807 808 809 810 811 812
		gtk_drag_find_widget (tmp_list->data, &new_data);
	      g_object_unref (tmp_list->data);
	    }
	  g_slist_free (children);
	  
	  data->found = new_data.found;
	}

      /* If not, and this widget is registered as a drop site, check to
813
       * emit "drag-motion" to check if we are actually in
Anders Carlsson's avatar
Anders Carlsson committed
814 815 816 817 818 819 820 821 822 823
       * a drop site.
       */
      if (!data->found &&
	  g_object_get_data (G_OBJECT (widget), "gtk-drag-dest"))
	{
	  data->found = data->callback (widget,
					data->context,
					data->x - x_offset - allocation_to_window_x,
					data->y - y_offset - allocation_to_window_y,
					data->time);
824
	  /* If so, send a "drag-leave" to the last widget */
Anders Carlsson's avatar
Anders Carlsson committed
825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849
	  if (data->found)
	    {
	      if (data->info->widget && data->info->widget != widget)
		{
		  gtk_drag_dest_leave (data->info->widget, data->context, data->time);
		}
	      data->info->widget = widget;
	    }
	}
    }
}

static void  
gtk_drag_dest_leave (GtkWidget      *widget,
		     GdkDragContext *context,
		     guint           time)
{
  GtkDragDestSite *site;

  site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
  g_return_if_fail (site != NULL);

  if ((site->flags & GTK_DEST_DEFAULT_HIGHLIGHT) && site->have_drag)
    gtk_drag_unhighlight (widget);
  
850 851
  if (!(site->flags & GTK_DEST_DEFAULT_MOTION) || site->have_drag ||
      site->track_motion)
852
    g_signal_emit_by_name (widget, "drag-leave", context, time);
Anders Carlsson's avatar
Anders Carlsson committed
853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870
  
  site->have_drag = FALSE;
}

static gboolean
gtk_drag_dest_motion (GtkWidget	     *widget,
		      GdkDragContext *context,
		      gint            x,
		      gint            y,
		      guint           time)
{
  GtkDragDestSite *site;
  GdkDragAction action = 0;
  gboolean retval;

  site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
  g_return_val_if_fail (site != NULL, FALSE);

871
  if (site->track_motion || site->flags & GTK_DEST_DEFAULT_MOTION)
Anders Carlsson's avatar
Anders Carlsson committed
872
    {
873 874
      if (gdk_drag_context_get_suggested_action (context) & site->actions)
	action = gdk_drag_context_get_suggested_action (context);
Anders Carlsson's avatar
Anders Carlsson committed
875 876 877 878 879 880 881 882 883 884 885 886 887 888 889
      
      if (action && gtk_drag_dest_find_target (widget, context, NULL))
	{
	  if (!site->have_drag)
	    {
	      site->have_drag = TRUE;
	      if (site->flags & GTK_DEST_DEFAULT_HIGHLIGHT)
		gtk_drag_highlight (widget);
	    }
	  
	  gdk_drag_status (context, action, time);
	}
      else
	{
	  gdk_drag_status (context, 0, time);
890 891
	  if (!site->track_motion)
	    return TRUE;
Anders Carlsson's avatar
Anders Carlsson committed
892 893 894
	}
    }

895
  g_signal_emit_by_name (widget, "drag-motion",
Anders Carlsson's avatar
Anders Carlsson committed
896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933
			 context, x, y, time, &retval);

  return (site->flags & GTK_DEST_DEFAULT_MOTION) ? TRUE : retval;
}

static gboolean
gtk_drag_dest_drop (GtkWidget	     *widget,
		    GdkDragContext   *context,
		    gint              x,
		    gint              y,
		    guint             time)
{
  GtkDragDestSite *site;
  GtkDragDestInfo *info;
  gboolean retval;

  site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
  g_return_val_if_fail (site != NULL, FALSE);

  info = gtk_drag_get_dest_info (context, FALSE);
  g_return_val_if_fail (info != NULL, FALSE);

  info->drop_x = x;
  info->drop_y = y;

  if (site->flags & GTK_DEST_DEFAULT_DROP)
    {
      GdkAtom target = gtk_drag_dest_find_target (widget, context, NULL);

      if (target == GDK_NONE)
	{
	  gtk_drag_finish (context, FALSE, FALSE, time);
	  return TRUE;
	}
      else
	gtk_drag_get_data (widget, context, target, time);
    }
  
934
  g_signal_emit_by_name (widget, "drag-drop",
Anders Carlsson's avatar
Anders Carlsson committed
935 936 937 938 939
			 context, x, y, time, &retval);

  return (site->flags & GTK_DEST_DEFAULT_DROP) ? TRUE : retval;
}

940 941 942 943 944
/**
 * gtk_drag_dest_set_track_motion: (method)
 * @widget: a #GtkWidget that's a drag destination
 * @track_motion: whether to accept all targets
 */
945 946 947 948
void
gtk_drag_dest_set_track_motion (GtkWidget *widget,
				gboolean   track_motion)
{
949 950
  GtkDragDestSite *site;

951 952
  g_return_if_fail (GTK_IS_WIDGET (widget));

953 954 955 956 957
  site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
  
  g_return_if_fail (site != NULL);

  site->track_motion = track_motion != FALSE;
958 959
}

960 961 962 963
/**
 * gtk_drag_dest_get_track_motion: (method)
 * @widget: a #GtkWidget that's a drag destination
 */
964 965 966
gboolean
gtk_drag_dest_get_track_motion (GtkWidget *widget)
{
967 968
  GtkDragDestSite *site;

969 970
  g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);

971 972 973 974
  site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");

  if (site)
    return site->track_motion;
975 976 977 978

  return FALSE;
}

Anders Carlsson's avatar
Anders Carlsson committed
979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025
void
_gtk_drag_dest_handle_event (GtkWidget *toplevel,
			     GdkEvent  *event)
{
  GtkDragDestInfo *info;
  GdkDragContext *context;

  g_return_if_fail (toplevel != NULL);
  g_return_if_fail (event != NULL);

  context = event->dnd.context;

  info = gtk_drag_get_dest_info (context, TRUE);

  /* Find the widget for the event */
  switch (event->type)
    {
    case GDK_DRAG_ENTER:
      break;

    case GDK_DRAG_LEAVE:
      if (info->widget)
	{
	  gtk_drag_dest_leave (info->widget, context, event->dnd.time);
	  info->widget = NULL;
	}
      break;

    case GDK_DRAG_MOTION:
    case GDK_DROP_START:
      {
	GtkDragFindData data;
	gint tx, ty;

	if (event->type == GDK_DROP_START)
	  {
	    info->dropped = TRUE;
	    /* We send a leave here so that the widget unhighlights
	     * properly.
	     */
	    if (info->widget)
	      {
		gtk_drag_dest_leave (info->widget, context, event->dnd.time);
		info->widget = NULL;
	      }
	  }

1026
	gdk_window_get_position (gtk_widget_get_window (toplevel), &tx, &ty);
Anders Carlsson's avatar
Anders Carlsson committed
1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061
	
	data.x = event->dnd.x_root - tx;
	data.y = event->dnd.y_root - ty;
 	data.context = context;
	data.info = info;
	data.found = FALSE;
	data.toplevel = TRUE;
	data.callback = (event->type == GDK_DRAG_MOTION) ?
	  gtk_drag_dest_motion : gtk_drag_dest_drop;
	data.time = event->dnd.time;
	
	gtk_drag_find_widget (toplevel, &data);

	if (info->widget && !data.found)
	  {
	    gtk_drag_dest_leave (info->widget, context, event->dnd.time);
	    info->widget = NULL;
	  }

	/* Send a reply.
	 */
	if (event->type == GDK_DRAG_MOTION)
	  {
	    if (!data.found)
	      gdk_drag_status (context, 0, event->dnd.time);
	  }

	break;
      default:
	g_assert_not_reached ();
      }
    }
}


1062 1063 1064 1065 1066 1067 1068
/**
 * gtk_drag_dest_find_target: (method)
 * @widget: drag destination widget
 * @context: drag context
 * @target_list: (allow-none): list of droppable targets, or %NULL to use
 *    gtk_drag_dest_get_target_list (@widget).
 */
Anders Carlsson's avatar
Anders Carlsson committed
1069 1070 1071 1072 1073
GdkAtom
gtk_drag_dest_find_target (GtkWidget      *widget,
                           GdkDragContext *context,
                           GtkTargetList  *target_list)
{
1074 1075
  id <NSDraggingInfo> dragging_info;
  NSPasteboard *pasteboard;
Anders Carlsson's avatar
Anders Carlsson committed
1076 1077 1078 1079 1080 1081 1082 1083
  GtkWidget *source_widget;
  GList *tmp_target;
  GList *tmp_source = NULL;
  GList *source_targets;

  g_return_val_if_fail (GTK_IS_WIDGET (widget), GDK_NONE);
  g_return_val_if_fail (GDK_IS_DRAG_CONTEXT (context), GDK_NONE);

1084 1085 1086
  dragging_info = gdk_quartz_drag_context_get_dragging_info_libgtk_only (context);
  pasteboard = [dragging_info draggingPasteboard];

Anders Carlsson's avatar
Anders Carlsson committed
1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122
  source_widget = gtk_drag_get_source_widget (context);

  if (target_list == NULL)
    target_list = gtk_drag_dest_get_target_list (widget);
  
  if (target_list == NULL)
    return GDK_NONE;

  source_targets = _gtk_quartz_pasteboard_types_to_atom_list ([pasteboard types]);
  tmp_target = target_list->list;
  while (tmp_target)
    {
      GtkTargetPair *pair = tmp_target->data;
      tmp_source = source_targets;
      while (tmp_source)
	{
	  if (tmp_source->data == GUINT_TO_POINTER (pair->target))
	    {
	      if ((!(pair->flags & GTK_TARGET_SAME_APP) || source_widget) &&
		  (!(pair->flags & GTK_TARGET_SAME_WIDGET) || (source_widget == widget)))
		{
		  g_list_free (source_targets);
		  return pair->target;
		}
	      else
		break;
	    }
	  tmp_source = tmp_source->next;
	}
      tmp_target = tmp_target->next;
    }

  g_list_free (source_targets);
  return GDK_NONE;
}

1123 1124 1125
static gboolean
gtk_drag_begin_idle (gpointer arg)
{
1126
  NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
1127 1128 1129 1130 1131 1132
  GdkDragContext* context = (GdkDragContext*) arg;
  GtkDragSourceInfo* info = gtk_drag_get_source_info (context, FALSE);
  NSWindow *nswindow;
  NSPasteboard *pasteboard;
  GtkDragSourceOwner *owner;
  NSPoint point;
1133
  NSSet *types;
1134
  NSImage *drag_image;
1135 1136 1137 1138 1139 1140

  g_assert (info != NULL);

  pasteboard = [NSPasteboard pasteboardWithName:NSDragPboard];
  owner = [[GtkDragSourceOwner alloc] initWithInfo:info];

1141 1142 1143 1144
  types = _gtk_quartz_target_list_to_pasteboard_types (info->target_list);

  [pasteboard declareTypes:[types allObjects] owner:owner];

1145
  [owner release];
1146
  [types release];
1147 1148

  if ((nswindow = get_toplevel_nswindow (info->source_widget)) == NULL)
1149
     return G_SOURCE_REMOVE;
1150 1151 1152 1153 1154 1155 1156
  
  /* Ref the context. It's unreffed when the drag has been aborted */
  g_object_ref (info->context);

  /* FIXME: If the event isn't a mouse event, use the global cursor position instead */
  point = [info->nsevent locationInWindow];

1157
  drag_image = _gtk_quartz_create_image_from_pixbuf (info->icon_pixbuf);
1158 1159 1160
  if (drag_image == NULL)
    {
      g_object_unref (info->context);
1161
      return G_SOURCE_REMOVE;
1162
    }
1163

1164
  point.x -= info->hot_x;
1165 1166
  point.y -= info->hot_y;

1167
  [nswindow dragImage:drag_image
1168
                   at:point
1169
               offset:NSZeroSize
1170 1171 1172 1173 1174 1175
                event:info->nsevent
           pasteboard:pasteboard
               source:nswindow
            slideBack:YES];

  [info->nsevent release];
1176
  [drag_image release];
1177

1178 1179
  [pool release];

1180
  return G_SOURCE_REMOVE;
1181
}
1182 1183 1184 1185 1186 1187 1188
/* Fake protocol to let us call GdkNSView gdkWindow without including
 * gdk/GdkNSView.h (which we can't because it pulls in the internal-only
 * gdkwindow.h).
 */
@protocol GdkNSView
- (GdkWindow *)gdkWindow;
@end
1189

Anders Carlsson's avatar
Anders Carlsson committed
1190 1191 1192 1193 1194 1195 1196 1197 1198
static GdkDragContext *
gtk_drag_begin_internal (GtkWidget         *widget,
			 GtkDragSourceSite *site,
			 GtkTargetList     *target_list,
			 GdkDragAction      actions,
			 gint               button,
			 GdkEvent          *event)
{
  GtkDragSourceInfo *info;
1199
  GdkDevice *pointer;
1200
  GdkWindow *window;
1201
  GdkDragContext *context;
1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212
  NSWindow *nswindow = get_toplevel_nswindow (widget);
  NSPoint point = {0, 0};
  gdouble x, y;
  double time = (double)g_get_real_time ();
  NSEvent *nsevent;
  NSTimeInterval nstime;

  if (event)
    {
      if (gdk_event_get_coords (event, &x, &y))
        {
1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229
          /* We need to translate (x, y) to coordinates relative to the
           * toplevel GdkWindow, which should be the GdkWindow backing
           * nswindow. Then, we convert to the NSWindow coordinate system.
           */
          GdkWindow *window = event->any.window;
          GdkWindow *toplevel = gdk_window_get_effective_toplevel (window);

          while (window != toplevel)
            {
              double old_x = x;
              double old_y = y;

              gdk_window_coords_to_parent (window, old_x, old_y,
                                           &x, &y);
              window = gdk_window_get_effective_parent (window);
            }

1230
          point.x = x;
1231
          point.y = gdk_window_get_height (window) - y;
1232 1233 1234
        }
      time = (double)gdk_event_get_time (event);
    }
1235

1236 1237
  nstime = [[NSDate dateWithTimeIntervalSince1970: time / 1000] timeIntervalSinceReferenceDate];
  nsevent = [NSEvent mouseEventWithType: NSLeftMouseDown
1238 1239 1240 1241 1242 1243 1244 1245
                      location: point
                      modifierFlags: 0
                      timestamp: nstime
                      windowNumber: [nswindow windowNumber]
                      context: [nswindow graphicsContext]
                      eventNumber: 0
                      clickCount: 1
                      pressure: 0.0 ];
1246 1247

  window = [(id<GdkNSView>)[nswindow contentView] gdkWindow];
1248
  g_return_val_if_fail (nsevent != NULL, NULL);
1249 1250

  context = gdk_drag_begin (window, NULL);
1251
  g_return_val_if_fail (context != NULL, NULL);
Anders Carlsson's avatar
Anders Carlsson committed
1252 1253

  info = gtk_drag_get_source_info (context, TRUE);
1254 1255 1256
  info->nsevent = nsevent;
  [info->nsevent retain];

1257
  info->source_widget = g_object_ref (widget);
1258
  info->widget = g_object_ref (widget);
Anders Carlsson's avatar
Anders Carlsson committed
1259 1260 1261 1262
  info->target_list = target_list;
  gtk_target_list_ref (target_list);

  info->possible_actions = actions;
1263

1264
  g_signal_emit_by_name (widget, "drag-begin", info->context);
Anders Carlsson's avatar
Anders Carlsson committed
1265 1266 1267 1268 1269 1270 1271 1272

  /* Ensure that we have an icon before we start the drag; the
   * application may have set one in ::drag_begin, or it may
   * not have set one.
   */
  if (!info->icon_pixbuf)
    {
      if (!site || site->icon_type == GTK_IMAGE_EMPTY)
1273
        gtk_drag_set_icon_default (context);
Anders Carlsson's avatar
Anders Carlsson committed
1274
      else
1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298
        {
          switch (site->icon_type)
            {
              case GTK_IMAGE_PIXBUF:
                  gtk_drag_set_icon_pixbuf (context,
                                            site->icon_data.pixbuf.pixbuf,
                                            -2, -2);
                  break;
              case GTK_IMAGE_STOCK:
                  gtk_drag_set_icon_stock (context,
                                           site->icon_data.stock.stock_id,
                                           -2, -2);
                  break;
              case GTK_IMAGE_ICON_NAME:
                  gtk_drag_set_icon_name (context,
                                          site->icon_data.name.icon_name,
                                          -2, -2);
                  break;
              case GTK_IMAGE_EMPTY:
              default:
                  g_assert_not_reached();
                  break;
            }
        }
Anders Carlsson's avatar
Anders Carlsson committed
1299 1300
    }

1301
  /* drag will begin in an idle handler to avoid nested run loops */
Anders Carlsson's avatar
Anders Carlsson committed
1302

1303
  g_idle_add_full (G_PRIORITY_HIGH_IDLE, gtk_drag_begin_idle, context, NULL);
Anders Carlsson's avatar
Anders Carlsson committed
1304

1305 1306
  pointer = gdk_drag_context_get_device (info->context);
  gdk_device_ungrab (pointer, 0);
1307 1308

  return context;
Anders Carlsson's avatar
Anders Carlsson committed
1309 1310
}

1311 1312 1313 1314 1315 1316 1317 1318 1319
/**
 * gtk_drag_begin: (method)
 * @widget: the source widget.
 * @targets: The targets (data formats) in which the
 *    source can provide the data.
 * @actions: A bitmask of the allowed drag actions for this drag.
 * @button: The button the user clicked to start the drag.
 * @event: The event that triggered the start of the drag.
 */
Anders Carlsson's avatar
Anders Carlsson committed
1320 1321 1322 1323 1324 1325 1326 1327
GdkDragContext *
gtk_drag_begin (GtkWidget         *widget,
		GtkTargetList     *targets,
		GdkDragAction      actions,
		gint               button,
		GdkEvent          *event)
{
  g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
1328
  g_return_val_if_fail (gtk_widget_get_realized (widget), NULL);
Anders Carlsson's avatar
Anders Carlsson committed
1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394
  g_return_val_if_fail (targets != NULL, NULL);

  return gtk_drag_begin_internal (widget, NULL, targets,
				  actions, button, event);
}


static gboolean
gtk_drag_source_event_cb (GtkWidget      *widget,
			  GdkEvent       *event,
			  gpointer        data)
{
  GtkDragSourceSite *site;
  gboolean retval = FALSE;
  site = (GtkDragSourceSite *)data;

  switch (event->type)
    {
    case GDK_BUTTON_PRESS:
      if ((GDK_BUTTON1_MASK << (event->button.button - 1)) & site->start_button_mask)
	{
	  site->state |= (GDK_BUTTON1_MASK << (event->button.button - 1));
	  site->x = event->button.x;
	  site->y = event->button.y;
	}
      break;
      
    case GDK_BUTTON_RELEASE:
      if ((GDK_BUTTON1_MASK << (event->button.button - 1)) & site->start_button_mask)
	site->state &= ~(GDK_BUTTON1_MASK << (event->button.button - 1));
      break;
      
    case GDK_MOTION_NOTIFY:
      if (site->state & event->motion.state & site->start_button_mask)
	{
	  /* FIXME: This is really broken and can leave us
	   * with a stuck grab
	   */
	  int i;
	  for (i=1; i<6; i++)
	    {
	      if (site->state & event->motion.state & 
		  GDK_BUTTON1_MASK << (i - 1))
		break;
	    }

	  if (gtk_drag_check_threshold (widget, site->x, site->y,
					event->motion.x, event->motion.y))
	    {
	      site->state = 0;
	      gtk_drag_begin_internal (widget, site, site->target_list,
				       site->actions, 
				       i, event);

	      retval = TRUE;
	    }
	}
      break;
      
    default:			/* hit for 2/3BUTTON_PRESS */
      break;
    }
  
  return retval;
}

1395 1396 1397 1398 1399 1400 1401 1402 1403
/**
 * gtk_drag_source_set: (method)
 * @widget: a #GtkWidget
 * @start_button_mask: the bitmask of buttons that can start the drag
 * @targets: (allow-none) (array length=n_targets): the table of targets that the drag will support,
 *     may be %NULL
 * @n_targets: the number of items in @targets
 * @actions: the bitmask of possible actions for a drag from this widget
 */
Anders Carlsson's avatar
Anders Carlsson committed
1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432
void 
gtk_drag_source_set (GtkWidget            *widget,
		     GdkModifierType       start_button_mask,
		     const GtkTargetEntry *targets,
		     gint                  n_targets,
		     GdkDragAction         actions)
{
  GtkDragSourceSite *site;

  g_return_if_fail (GTK_IS_WIDGET (widget));

  site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");

  gtk_widget_add_events (widget,
			 gtk_widget_get_events (widget) |
			 GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
			 GDK_BUTTON_MOTION_MASK);

  if (site)
    {
      if (site->target_list)
	gtk_target_list_unref (site->target_list);
    }
  else
    {
      site = g_new0 (GtkDragSourceSite, 1);

      site->icon_type = GTK_IMAGE_EMPTY;
      
1433
      g_signal_connect (widget, "button-press-event",
Anders Carlsson's avatar
Anders Carlsson committed
1434 1435
			G_CALLBACK (gtk_drag_source_event_cb),
			site);
1436
      g_signal_connect (widget, "button-release-event",
Anders Carlsson's avatar
Anders Carlsson committed
1437 1438
			G_CALLBACK (gtk_drag_source_event_cb),
			site);
1439
      g_signal_connect (widget, "motion-notify-event",
Anders Carlsson's avatar
Anders Carlsson committed
1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454
			G_CALLBACK (gtk_drag_source_event_cb),
			site);
      
      g_object_set_data_full (G_OBJECT (widget),
			      I_("gtk-site-data"), 
			      site, gtk_drag_source_site_destroy);
    }

  site->start_button_mask = start_button_mask;

  site->target_list = gtk_target_list_new (targets, n_targets);

  site->actions = actions;
}

1455 1456 1457 1458
/**
 * gtk_drag_source_unset: (method)
 * @widget: a #GtkWidget
 */
Anders Carlsson's avatar
Anders Carlsson committed
1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476
void 
gtk_drag_source_unset (GtkWidget *widget)
{
  GtkDragSourceSite *site;

  g_return_if_fail (GTK_IS_WIDGET (widget));

  site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");

  if (site)
    {
      g_signal_handlers_disconnect_by_func (widget,
					    gtk_drag_source_event_cb,
					    site);
      g_object_set_data (G_OBJECT (widget), I_("gtk-site-data"), NULL);
    }
}

1477 1478 1479 1480
/**
 * gtk_drag_source_get_target_list: (method)
 * @widget: a #GtkWidget
 */
Anders Carlsson's avatar
Anders Carlsson committed
1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493
GtkTargetList *
gtk_drag_source_get_target_list (GtkWidget *widget)
{
  GtkDragSourceSite *site;

  g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);

  site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");

  return site ? site->target_list : NULL;

}

1494 1495 1496 1497 1498
/**
 * gtk_drag_source_set_target_list: (method)
 * @widget: a #GtkWidget that's a drag source
 * @target_list: (allow-none): list of draggable targets, or %NULL for none
 */
Anders Carlsson's avatar
Anders Carlsson committed
1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550
void
gtk_drag_source_set_target_list (GtkWidget     *widget,
                                 GtkTargetList *target_list)
{
  GtkDragSourceSite *site;

  g_return_if_fail (GTK_IS_WIDGET (widget));

  site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
  if (site == NULL)
    {
      g_warning ("gtk_drag_source_set_target_list() requires the widget "
		 "to already be a drag source.");
      return;
    }

  if (target_list)
    gtk_target_list_ref (target_list);

  if (site->target_list)
    gtk_target_list_unref (site->target_list);

  site->target_list = target_list;
}

/**
 * gtk_drag_source_add_text_targets:
 * @widget: a #GtkWidget that's is a drag source
 *
 * Add the text targets supported by #GtkSelection to
 * the target list of the drag source.  The targets
 * are added with @info = 0. If you need another value, 
 * use gtk_target_list_add_text_targets() and
 * gtk_drag_source_set_target_list().
 * 
 * Since: 2.6
 **/
void
gtk_drag_source_add_text_targets (GtkWidget *widget)
{
  GtkTargetList *target_list;

  target_list = gtk_drag_source_get_target_list (widget);
  if (target_list)
    gtk_target_list_ref (target_list);
  else
    target_list = gtk_target_list_new (NULL, 0);
  gtk_target_list_add_text_targets (target_list, 0);
  gtk_drag_source_set_target_list (widget, target_list);
  gtk_target_list_unref (target_list);
}

1551 1552 1553 1554
/**
 * gtk_drag_source_add_image_targets: (method)
 * @widget: a #GtkWidget that's is a drag source
 */
Anders Carlsson's avatar
Anders Carlsson committed
1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569
void
gtk_drag_source_add_image_targets (GtkWidget *widget)
{
  GtkTargetList *target_list;

  target_list = gtk_drag_source_get_target_list (widget);
  if (target_list)
    gtk_target_list_ref (target_list);
  else
    target_list = gtk_target_list_new (NULL, 0);
  gtk_target_list_add_image_targets (target_list, 0, TRUE);
  gtk_drag_source_set_target_list (widget, target_list);
  gtk_target_list_unref (target_list);
}

1570 1571 1572 1573
/**
 * gtk_drag_source_add_uri_targets: (method)
 * @widget: a #GtkWidget that's is a drag source
 */
Anders Carlsson's avatar
Anders Carlsson committed
1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623
void
gtk_drag_source_add_uri_targets (GtkWidget *widget)
{
  GtkTargetList *target_list;

  target_list = gtk_drag_source_get_target_list (widget);
  if (target_list)
    gtk_target_list_ref (target_list);
  else
    target_list = gtk_target_list_new (NULL, 0);
  gtk_target_list_add_uri_targets (target_list, 0);
  gtk_drag_source_set_target_list (widget, target_list);
  gtk_target_list_unref (target_list);
}

static void
gtk_drag_source_unset_icon (GtkDragSourceSite *site)
{
  switch (site->icon_type)
    {
    case GTK_IMAGE_EMPTY:
      break;
    case GTK_IMAGE_PIXBUF:
      g_object_unref (site->icon_data.pixbuf.pixbuf);
      break;
    case GTK_IMAGE_STOCK:
      g_free (site->icon_data.stock.stock_id);
      break;
    case GTK_IMAGE_ICON_NAME:
      g_free (site->icon_data.name.icon_name);
      break;
    default:
      g_assert_not_reached();
      break;
    }
  site->icon_type = GTK_IMAGE_EMPTY;
}

static void 
gtk_drag_source_site_destroy (gpointer data)
{
  GtkDragSourceSite *site = data;

  if (site->target_list)
    gtk_target_list_unref (site->target_list);

  gtk_drag_source_unset_icon (site);
  g_free (site);
}

1624 1625 1626 1627 1628
/**
 * gtk_drag_source_set_icon_pixbuf: (method)
 * @widget: a #GtkWidget
 * @pixbuf: the #GdkPixbuf for the drag icon
 */
Anders Carlsson's avatar
Anders Carlsson committed
1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712
void 
gtk_drag_source_set_icon_pixbuf (GtkWidget   *widget,
				 GdkPixbuf   *pixbuf)
{
  GtkDragSourceSite *site;

  g_return_if_fail (GTK_IS_WIDGET (widget));
  g_return_if_fail (GDK_IS_PIXBUF (pixbuf));

  site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
  g_return_if_fail (site != NULL); 
  g_object_ref (pixbuf);

  gtk_drag_source_unset_icon (site);

  site->icon_type = GTK_IMAGE_PIXBUF;
  site->icon_data.pixbuf.pixbuf = pixbuf;
}

/**
 * gtk_drag_source_set_icon_stock:
 * @widget: a #GtkWidget
 * @stock_id: the ID of the stock icon to use
 *
 * Sets the icon that will be used for drags from a particular source
 * to a stock icon. 
 **/
void 
gtk_drag_source_set_icon_stock (GtkWidget   *widget,
				const gchar *stock_id)
{
  GtkDragSourceSite *site;

  g_return_if_fail (GTK_IS_WIDGET (widget));
  g_return_if_fail (stock_id != NULL);

  site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
  g_return_if_fail (site != NULL);
  
  gtk_drag_source_unset_icon (site);

  site->icon_type = GTK_IMAGE_STOCK;
  site->icon_data.stock.stock_id = g_strdup (stock_id);
}

/**
 * gtk_drag_source_set_icon_name:
 * @widget: a #GtkWidget
 * @icon_name: name of icon to use
 * 
 * Sets the icon that will be used for drags from a particular source
 * to a themed icon. See the docs for #GtkIconTheme for more details.
 *
 * Since: 2.8
 **/
void 
gtk_drag_source_set_icon_name (GtkWidget   *widget,
			       const gchar *icon_name)
{
  GtkDragSourceSite *site;

  g_return_if_fail (GTK_IS_WIDGET (widget));
  g_return_if_fail (icon_name != NULL);

  site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
  g_return_if_fail (site != NULL);

  gtk_drag_source_unset_icon (site);

  site->icon_type = GTK_IMAGE_ICON_NAME;
  site->icon_data.name.icon_name = g_strdup (icon_name);
}


/**
 * gtk_drag_set_icon_widget:
 * @context: the context for a drag. (This must be called 
          with a  context for the source side of a drag)
 * @widget: a toplevel window to use as an icon.
 * @hot_x: the X offset within @widget of the hotspot.
 * @hot_y: the Y offset within @widget of the hotspot.
 * 
 * Changes the icon for a widget to a given widget. GTK+
 * will not destroy the icon, so if you don't want
1713
 * it to persist, you should connect to the "drag-end" 
Anders Carlsson's avatar
Anders Carlsson committed
1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740
 * signal and destroy it yourself.
 **/
void 
gtk_drag_set_icon_widget (GdkDragContext    *context,
			  GtkWidget         *widget,
			  gint               hot_x,
			  gint               hot_y)
{
  g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
  g_return_if_fail (GTK_IS_WIDGET (widget));

  g_warning ("gtk_drag_set_icon_widget is not supported on Mac OS X");
}

static void
set_icon_stock_pixbuf (GdkDragContext    *context,
		       const gchar       *stock_id,
		       GdkPixbuf         *pixbuf,
		       gint               hot_x,
		       gint               hot_y)
{
  GtkDragSourceInfo *info;

  info = gtk_drag_get_source_info (context, FALSE);

  if (stock_id)
    {
1741
      pixbuf = gtk_widget_render_icon_pixbuf (info->widget, stock_id,
1742
				              GTK_ICON_SIZE_DND);
Anders Carlsson's avatar
Anders Carlsson committed
1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804

      if (!pixbuf)
	{
	  g_warning ("Cannot load drag icon from stock_id %s", stock_id);
	  return;
	}
    }
  else
    g_object_ref (pixbuf);

  if (info->icon_pixbuf)
    g_object_unref (info->icon_pixbuf);
  info->icon_pixbuf = pixbuf;
  info->hot_x = hot_x;
  info->hot_y = hot_y;
}

/**
 * gtk_drag_set_icon_pixbuf:
 * @context: the context for a drag. (This must be called 
 *            with a  context for the source side of a drag)
 * @pixbuf: the #GdkPixbuf to use as the drag icon.
 * @hot_x: the X offset within @widget of the hotspot.
 * @hot_y: the Y offset within @widget of the hotspot.
 * 
 * Sets @pixbuf as the icon for a given drag.
 **/
void 
gtk_drag_set_icon_pixbuf  (GdkDragContext *context,
			   GdkPixbuf      *pixbuf,
			   gint            hot_x,
			   gint            hot_y)
{
  g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
  g_return_if_fail (GDK_IS_PIXBUF (pixbuf));

  set_icon_stock_pixbuf (context, NULL, pixbuf, hot_x, hot_y);
}

/**
 * gtk_drag_set_icon_stock:
 * @context: the context for a drag. (This must be called 
 *            with a  context for the source side of a drag)
 * @stock_id: the ID of the stock icon to use for the drag.
 * @hot_x: the X offset within the icon of the hotspot.
 * @hot_y: the Y offset within the icon of the hotspot.
 * 
 * Sets the icon for a given drag from a stock ID.
 **/
void 
gtk_drag_set_icon_stock  (GdkDragContext *context,
			  const gchar    *stock_id,
			  gint            hot_x,
			  gint            hot_y)
{

  g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
  g_return_if_fail (stock_id != NULL);

  set_icon_stock_pixbuf (context, stock_id, NULL, hot_x, hot_y);
}

1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863

/* XXX: This function is in gdk, too. Should it be in Cairo? */
static gboolean
_gtk_cairo_surface_extents (cairo_surface_t *surface,
                            GdkRectangle *extents)
{
  double x1, x2, y1, y2;
  cairo_t *cr;

  g_return_val_if_fail (surface != NULL, FALSE);
  g_return_val_if_fail (extents != NULL, FALSE);

  cr = cairo_create (surface);
  cairo_clip_extents (cr, &x1, &y1, &x2, &y2);

  x1 = floor (x1);
  y1 = floor (y1);
  x2 = ceil (x2);
  y2 = ceil (y2);
  x2 -= x1;
  y2 -= y1;
  
  if (x1 < G_MININT || x1 > G_MAXINT ||
      y1 < G_MININT || y1 > G_MAXINT ||
      x2 > G_MAXINT || y2 > G_MAXINT)
    {
      extents->x = extents->y = extents->width = extents->height = 0;
      return FALSE;
    }

  extents->x = x1;
  extents->y = y1;
  extents->width = x2;
  extents->height = y2;

  return TRUE;
}

/**
 * gtk_drag_set_icon_surface:
 * @context: the context for a drag. (This must be called
 *            with a context for the source side of a drag)
 * @surface: the surface to use as icon
 *
 * Sets @surface as the icon for a given drag. GTK+ retains
 * references for the arguments, and will release them when
 * they are no longer needed.
 *
 * To position the surface relative to the mouse, use
 * cairo_surface_set_device_offset() on @surface. The mouse
 * cursor will be positioned at the (0,0) coordinate of the
 * surface.
 **/
void
gtk_drag_set_icon_surface (GdkDragContext  *context,
                           cairo_surface_t *surface)
{
  GdkPixbuf *pixbuf;
  GdkRectangle extents;
1864
  double x_offset, y_offset;
1865 1866 1867 1868 1869

  g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
  g_return_if_fail (surface != NULL);

  _gtk_cairo_surface_extents (surface, &extents);
1870
  cairo_surface_get_device_offset (surface, &x_offset, &y_offset);
1871 1872 1873 1874

  pixbuf = gdk_pixbuf_get_from_surface (surface,
                                        extents.x, extents.y,
                                        extents.width, extents.height);
1875
  gtk_drag_set_icon_pixbuf (context, pixbuf, -x_offset, -y_offset);
1876 1877 1878
  g_object_unref (pixbuf);
}

Anders Carlsson's avatar
Anders Carlsson committed
1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909
/**
 * gtk_drag_set_icon_name:
 * @context: the context for a drag. (This must be called 
 *            with a context for the source side of a drag)
 * @icon_name: name of icon to use
 * @hot_x: the X offset of the hotspot within the icon
 * @hot_y: the Y offset of the hotspot within the icon
 * 
 * Sets the icon for a given drag from a named themed icon. See
 * the docs for #GtkIconTheme for more details. Note that the
 * size of the icon depends on the icon theme (the icon is
 * loaded at the symbolic size #GTK_ICON_SIZE_DND), thus 
 * @hot_x and @hot_y have to be used with care.
 *
 * Since: 2.8
 **/
void 
gtk_drag_set_icon_name (GdkDragContext *context,
			const gchar    *icon_name,
			gint            hot_x,
			gint            hot_y)
{
  GdkScreen *screen;
  GtkSettings *settings;
  GtkIconTheme *icon_theme;
  GdkPixbuf *pixbuf;
  gint width, height, icon_size;

  g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
  g_return_if_fail (icon_name != NULL);

1910
  screen = gdk_window_get_screen (gdk_drag_context_get_source_window (context));
Anders Carlsson's avatar
Anders Carlsson committed
1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949
  g_return_if_fail (screen != NULL);

  settings = gtk_settings_get_for_screen (screen);
  if (gtk_icon_size_lookup_for_settings (settings,
					 GTK_ICON_SIZE_DND,
					 &width, &height))
    icon_size = MAX (width, height);
  else 
    icon_size = 32; /* default value for GTK_ICON_SIZE_DND */ 

  icon_theme = gtk_icon_theme_get_for_screen (screen);

  pixbuf = gtk_icon_theme_load_icon (icon_theme, icon_name,
		  		     icon_size, 0, NULL);
  if (pixbuf)
    set_icon_stock_pixbuf (context, NULL, pixbuf, hot_x, hot_y);
  else
    g_warning ("Cannot load drag icon from icon name %s", icon_name);
}

/**
 * gtk_drag_set_icon_default:
 * @context: the context for a drag. (This must be called 
             with a  context for the source side of a drag)
 * 
 * Sets the icon for a particular drag to the default
 * icon.
 **/
void 
gtk_drag_set_icon_default (GdkDragContext    *context)
{
  g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));

  gtk_drag_set_icon_stock (context, GTK_STOCK_DND, -2, -2);
}

static void
gtk_drag_source_info_destroy (GtkDragSourceInfo *info)
{
1950 1951 1952
  NSPasteboard *pasteboard;
  NSAutoreleasePool *pool;

Anders Carlsson's avatar
Anders Carlsson committed
1953 1954 1955
  if (info->icon_pixbuf)
    g_object_unref (info->icon_pixbuf);

1956
  g_signal_emit_by_name (info->widget, "drag-end", 
Anders Carlsson's avatar
Anders Carlsson committed
1957 1958
			 info->context);

1959 1960 1961
  if (info->source_widget)
    g_object_unref (info->source_widget);

Anders Carlsson's avatar
Anders Carlsson committed
1962 1963 1964 1965 1966
  if (info->widget)
    g_object_unref (info->widget);

  gtk_target_list_unref (info->target_list);

1967 1968 1969 1970 1971 1972 1973 1974
  pool = [[NSAutoreleasePool alloc] init];

  /* Empty the pasteboard, so that it will not accidentally access
   * info->context after it has been destroyed.
   */
  pasteboard = [NSPasteboard pasteboardWithName: NSDragPboard];
  [pasteboard declareTypes: nil owner: nil];

1975
  [pool release];
1976

Anders Carlsson's avatar
Anders Carlsson committed
1977 1978 1979 1980
  gtk_drag_clear_source_info (info->context);
  g_object_unref (info->context);

  g_free (info);
1981
  info = NULL;
Anders Carlsson's avatar
Anders Carlsson committed
1982 1983
}

1984 1985 1986 1987
static gboolean
drag_drop_finished_idle_cb (gpointer data)
{
  gtk_drag_source_info_destroy (data);
1988
  return G_SOURCE_REMOVE;
1989 1990
}

Anders Carlsson's avatar
Anders Carlsson committed
1991 1992 1993
static void
gtk_drag_drop_finished (GtkDragSourceInfo *info)
{
1994 1995 1996 1997
  if (info->success && info->delete)
    g_signal_emit_by_name (info->source_widget, "drag-data-delete",
                           info->context);

1998 1999 2000 2001 2002
  /* Workaround for the fact that the NS API blocks until the drag is
   * over. This way the context is still valid when returning from
   * drag_begin, even if it will still be quite useless. See bug #501588.
  */
  g_idle_add (drag_drop_finished_idle_cb, info);
Anders Carlsson's avatar
Anders Carlsson committed
2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040
}

/*************************************************************
 * _gtk_drag_source_handle_event:
 *     Called from widget event handling code on Drag events
 *     for drag sources.
 *
 *   arguments:
 *     toplevel: Toplevel widget that received the event
 *     event:
 *   results:
 *************************************************************/

void
_gtk_drag_source_handle_event (GtkWidget *widget,
			       GdkEvent  *event)
{
  GtkDragSourceInfo *info;
  GdkDragContext *context;

  g_return_if_fail (widget != NULL);
  g_return_if_fail (event != NULL);

  context = event->dnd.context;
  info = gtk_drag_get_source_info (context, FALSE);
  if (!info)
    return;

  switch (event->type)
    {
    case GDK_DROP_FINISHED:
      gtk_drag_drop_finished (info);
      break;
    default:
      g_assert_not_reached ();
    }  
}

2041 2042 2043 2044 2045 2046 2047 2048
/**
 * gtk_drag_check_threshold: (method)
 * @widget: a #GtkWidget
 * @start_x: X coordinate of start of drag
 * @start_y: Y coordinate of start of drag
 * @current_x: current X coordinate
 * @current_y: current Y coordinate
 */
Anders Carlsson's avatar
Anders Carlsson committed
2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066
gboolean
gtk_drag_check_threshold (GtkWidget *widget,
			  gint       start_x,
			  gint       start_y,
			  gint       current_x,
			  gint       current_y)
{
  gint drag_threshold;

  g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);

  g_object_get (gtk_widget_get_settings (widget),
		"gtk-dnd-drag-threshold", &drag_threshold,
		NULL);
  
  return (ABS (current_x - start_x) > drag_threshold ||
	  ABS (current_y - start_y) > drag_threshold);
}