gtkdnd-quartz.c 46.1 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 15 16 17 18 19 20 21 22 23 24 25 26
 * 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
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/*
 * 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/. 
 */

27
#include "config.h"
Anders Carlsson's avatar
Anders Carlsson committed
28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

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

#include "gdkconfig.h"

#include "gdk/gdkkeysyms.h"

#include "gtkdnd.h"
#include "gtkiconfactory.h"
#include "gtkicontheme.h"
#include "gtkimage.h"
#include "gtkinvisible.h"
#include "gtkmain.h"
#include "gtkplug.h"
#include "gtkstock.h"
#include "gtkwindow.h"
#include "gtkintl.h"
#include "gtkquartz.h"
#include "gdk/quartz/gdkquartz.h"

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);

65 66 67 68 69
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
70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91
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 
{
92
  GtkWidget         *source_widget;
Anders Carlsson's avatar
Anders Carlsson committed
93 94 95 96
  GtkWidget         *widget;
  GtkTargetList     *target_list; /* Targets for drag data */
  GdkDragAction      possible_actions; /* Actions allowed by source */
  GdkDragContext    *context;	  /* drag context */
97
  NSEvent           *nsevent;     /* what started it */
Anders Carlsson's avatar
Anders Carlsson committed
98 99
  gint hot_x, hot_y;		  /* Hot spot for drag */
  GdkPixbuf         *icon_pixbuf;
100 101
  gboolean           success;
  gboolean           delete;
Anders Carlsson's avatar
Anders Carlsson committed
102 103 104 105 106 107 108 109
};

struct _GtkDragDestSite 
{
  GtkDestDefaults    flags;
  GtkTargetList     *target_list;
  GdkDragAction      actions;
  guint              have_drag : 1;
Richard Hult's avatar
Richard Hult committed
110
  guint              track_motion : 1;
Anders Carlsson's avatar
Anders Carlsson committed
111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148
};

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;
149
  selection_data.length = -1;
Anders Carlsson's avatar
Anders Carlsson committed
150 151 152 153 154 155
  selection_data.target = _gtk_quartz_pasteboard_type_to_atom (type);

  if (gtk_target_list_find (info->target_list, 
			    selection_data.target, 
			    &target_info)) 
    {
156
      g_signal_emit_by_name (info->widget, "drag-data-get",
Anders Carlsson's avatar
Anders Carlsson committed
157 158 159 160 161
			     info->context,
			     &selection_data,
			     target_info,
			     time);

162 163
      if (selection_data.length >= 0)
        _gtk_quartz_set_selection_data_for_pasteboard (sender, &selection_data);
Anders Carlsson's avatar
Anders Carlsson committed
164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188
      
      g_free (selection_data.data);
    }
}

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

  if (self) 
    {
      info = anInfo;
    }

  return self;
}

@end

void 
gtk_drag_get_data (GtkWidget      *widget,
		   GdkDragContext *context,
		   GdkAtom         target,
		   guint32         time)
{
189 190
  id <NSDraggingInfo> dragging_info;
  NSPasteboard *pasteboard;
Anders Carlsson's avatar
Anders Carlsson committed
191 192 193 194
  GtkSelectionData *selection_data;
  GtkDragDestInfo *info;
  GtkDragDestSite *site;

195 196 197
  dragging_info = gdk_quartz_drag_context_get_dragging_info_libgtk_only (context);
  pasteboard = [dragging_info draggingPasteboard];

Anders Carlsson's avatar
Anders Carlsson committed
198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214
  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,
215
				   "drag-data-received",
Anders Carlsson's avatar
Anders Carlsson committed
216 217 218 219 220 221 222 223
				   context, info->drop_x, info->drop_y,
				   selection_data,
				   target_info, time);
	}
    }
  else
    {
      g_signal_emit_by_name (widget,
224
			     "drag-data-received",
Anders Carlsson's avatar
Anders Carlsson committed
225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244
			     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),
		       (context->action == GDK_ACTION_MOVE),
		       time);
    }      
}

void 
gtk_drag_finish (GdkDragContext *context,
		 gboolean        success,
		 gboolean        del,
		 guint32         time)
{
245 246 247 248 249 250 251 252 253 254 255 256
  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
257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296
}

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;
Richard Hult's avatar
Richard Hult committed
297

Anders Carlsson's avatar
Anders Carlsson committed
298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317
  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);
}

318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333
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
334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350
/*************************************************************
 * gtk_drag_highlight_expose:
 *     Callback for expose_event for highlighted widgets.
 *   arguments:
 *     widget:
 *     event:
 *     data:
 *   results:
 *************************************************************/

static gboolean
gtk_drag_highlight_expose (GtkWidget      *widget,
			   GdkEventExpose *event,
			   gpointer        data)
{
  gint x, y, width, height;
  
351
  if (gtk_widget_is_drawable (widget))
Anders Carlsson's avatar
Anders Carlsson committed
352 353
    {
      cairo_t *cr;
354
      GdkWindow *window = gtk_widget_get_window (widget);
Anders Carlsson's avatar
Anders Carlsson committed
355
      
356
      if (!gtk_widget_get_has_window (widget))
Anders Carlsson's avatar
Anders Carlsson committed
357
	{
358 359 360 361 362 363 364 365
          GtkAllocation allocation;

          gtk_widget_get_allocation (widget, &allocation);

	  x = allocation.x;
	  y = allocation.y;
	  width = allocation.width;
	  height = allocation.height;
Anders Carlsson's avatar
Anders Carlsson committed
366 367 368 369 370
	}
      else
	{
	  x = 0;
	  y = 0;
371
	  gdk_drawable_get_size (window, &width, &height);
Anders Carlsson's avatar
Anders Carlsson committed
372 373
	}
      
374
      gtk_paint_shadow (gtk_widget_get_style (widget), window,
Anders Carlsson's avatar
Anders Carlsson committed
375 376 377 378
		        GTK_STATE_NORMAL, GTK_SHADOW_OUT,
		        NULL, widget, "dnd",
			x, y, width, height);

379
      cr = gdk_cairo_create (window);
Anders Carlsson's avatar
Anders Carlsson committed
380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404
      cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
      cairo_set_line_width (cr, 1.0);
      cairo_rectangle (cr,
		       x + 0.5, y + 0.5,
		       width - 1, height - 1);
      cairo_stroke (cr);
      cairo_destroy (cr);
    }

  return FALSE;
}

/*************************************************************
 * gtk_drag_highlight:
 *     Highlight the given widget in the default manner.
 *   arguments:
 *     widget:
 *   results:
 *************************************************************/

void 
gtk_drag_highlight (GtkWidget  *widget)
{
  g_return_if_fail (GTK_IS_WIDGET (widget));

405
  g_signal_connect_after (widget, "expose-event",
Anders Carlsson's avatar
Anders Carlsson committed
406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435
			  G_CALLBACK (gtk_drag_highlight_expose),
			  NULL);

  gtk_widget_queue_draw (widget);
}

/*************************************************************
 * gtk_drag_unhighlight:
 *     Refresh the given widget to remove the highlight.
 *   arguments:
 *     widget:
 *   results:
 *************************************************************/

void 
gtk_drag_unhighlight (GtkWidget *widget)
{
  g_return_if_fail (GTK_IS_WIDGET (widget));

  g_signal_handlers_disconnect_by_func (widget,
					gtk_drag_highlight_expose,
					NULL);
  
  gtk_widget_queue_draw (widget);
}

static NSWindow *
get_toplevel_nswindow (GtkWidget *widget)
{
  GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
436
  GdkWindow *window = gtk_widget_get_window (toplevel);
Anders Carlsson's avatar
Anders Carlsson committed
437
  
438 439
  if (gtk_widget_is_toplevel (toplevel) && window)
    return [gdk_quartz_window_get_nsview (window) window];
Anders Carlsson's avatar
Anders Carlsson committed
440 441 442 443 444 445 446 447 448 449
  else
    return NULL;
}

static void
register_types (GtkWidget *widget, GtkDragDestSite *site)
{
  if (site->target_list)
    {
      NSWindow *nswindow = get_toplevel_nswindow (widget);
450
      NSSet *types;
Anders Carlsson's avatar
Anders Carlsson committed
451 452 453 454 455
      NSAutoreleasePool *pool;

      if (!nswindow)
	return;

Richard Hult's avatar
Richard Hult committed
456
      pool = [[NSAutoreleasePool alloc] init];
Anders Carlsson's avatar
Anders Carlsson committed
457 458
      types = _gtk_quartz_target_list_to_pasteboard_types (site->target_list);

459
      [nswindow registerForDraggedTypes:[types allObjects]];
460 461

      [types release];
Anders Carlsson's avatar
Anders Carlsson committed
462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502
      [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);
}

void 
gtk_drag_dest_set (GtkWidget            *widget,
		   GtkDestDefaults       flags,
		   const GtkTargetEntry *targets,
		   gint                  n_targets,
		   GdkDragAction         actions)
{
Richard Hult's avatar
Richard Hult committed
503
  GtkDragDestSite *old_site, *site;
Anders Carlsson's avatar
Anders Carlsson committed
504 505 506

  g_return_if_fail (GTK_IS_WIDGET (widget));

Richard Hult's avatar
Richard Hult committed
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;

Richard Hult's avatar
Richard Hult committed
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
531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548
		    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);
}

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.");
}

void 
gtk_drag_dest_unset (GtkWidget *widget)
{
549 550
  GtkDragDestSite *old_site;

Anders Carlsson's avatar
Anders Carlsson committed
551 552
  g_return_if_fail (GTK_IS_WIDGET (widget));

553 554 555 556 557 558 559 560 561 562 563
  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
564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670
  g_object_set_data (G_OBJECT (widget), I_("gtk-drag-dest"), NULL);
}

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;  
}

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);
}

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);
}

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);
}

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;

671
  if (data->found || !gtk_widget_get_mapped (widget) || !gtk_widget_get_sensitive (widget))
Anders Carlsson's avatar
Anders Carlsson committed
672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687
    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.
   */  
688
  gtk_widget_get_allocation (widget, &new_allocation);
Anders Carlsson's avatar
Anders Carlsson committed
689

690
  if (gtk_widget_get_parent (widget))
Anders Carlsson's avatar
Anders Carlsson committed
691 692
    {
      gint tx, ty;
693 694 695 696 697
      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
698 699 700 701

      /* Compute the offset from allocation-relative to
       * window-relative coordinates.
       */
702 703 704
      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
705

706
      if (gtk_widget_get_has_window (widget))
Anders Carlsson's avatar
Anders Carlsson committed
707 708 709 710 711 712 713 714 715 716 717 718 719
	{
	  /* 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;
      
720
      while (window && window != parent_window)
Anders Carlsson's avatar
Anders Carlsson committed
721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760
	{
	  GdkRectangle window_rect = { 0, 0, 0, 0 };
	  
	  gdk_drawable_get_size (window, &window_rect.width, &window_rect.height);

	  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
761
	   * ::drag-motion/::drag-drop callbacks change the widget hierarchy.
Anders Carlsson's avatar
Anders Carlsson committed
762 763 764 765
	   */
	  gtk_container_forall (GTK_CONTAINER (widget), prepend_and_ref_widget, &children);
	  for (tmp_list = children; tmp_list; tmp_list = tmp_list->next)
	    {
766
	      if (!new_data.found && gtk_widget_is_drawable (tmp_list->data))
Anders Carlsson's avatar
Anders Carlsson committed
767 768 769 770 771 772 773 774 775
		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
776
       * emit "drag-motion" to check if we are actually in
Anders Carlsson's avatar
Anders Carlsson committed
777 778 779 780 781 782 783 784 785 786
       * 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);
787
	  /* If so, send a "drag-leave" to the last widget */
Anders Carlsson's avatar
Anders Carlsson committed
788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812
	  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);
  
Richard Hult's avatar
Richard Hult committed
813 814
  if (!(site->flags & GTK_DEST_DEFAULT_MOTION) || site->have_drag ||
      site->track_motion)
815
    g_signal_emit_by_name (widget, "drag-leave", context, time);
Anders Carlsson's avatar
Anders Carlsson committed
816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833
  
  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);

Richard Hult's avatar
Richard Hult committed
834
  if (site->track_motion || site->flags & GTK_DEST_DEFAULT_MOTION)
Anders Carlsson's avatar
Anders Carlsson committed
835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852
    {
      if (context->suggested_action & site->actions)
	action = context->suggested_action;
      
      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);
Richard Hult's avatar
Richard Hult committed
853 854
	  if (!site->track_motion)
	    return TRUE;
Anders Carlsson's avatar
Anders Carlsson committed
855 856 857
	}
    }

858
  g_signal_emit_by_name (widget, "drag-motion",
Anders Carlsson's avatar
Anders Carlsson committed
859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896
			 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);
    }
  
897
  g_signal_emit_by_name (widget, "drag-drop",
Anders Carlsson's avatar
Anders Carlsson committed
898 899 900 901 902
			 context, x, y, time, &retval);

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

903 904 905 906
void
gtk_drag_dest_set_track_motion (GtkWidget *widget,
				gboolean   track_motion)
{
Richard Hult's avatar
Richard Hult committed
907 908
  GtkDragDestSite *site;

909 910
  g_return_if_fail (GTK_IS_WIDGET (widget));

Richard Hult's avatar
Richard Hult committed
911 912 913 914 915
  site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
  
  g_return_if_fail (site != NULL);

  site->track_motion = track_motion != FALSE;
916 917 918 919 920
}

gboolean
gtk_drag_dest_get_track_motion (GtkWidget *widget)
{
Richard Hult's avatar
Richard Hult committed
921 922
  GtkDragDestSite *site;

923 924
  g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);

Richard Hult's avatar
Richard Hult committed
925 926 927 928
  site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");

  if (site)
    return site->track_motion;
929 930 931 932

  return FALSE;
}

Anders Carlsson's avatar
Anders Carlsson committed
933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979
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;
	      }
	  }

980
	gdk_window_get_position (gtk_widget_get_window (toplevel), &tx, &ty);
Anders Carlsson's avatar
Anders Carlsson committed
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
	
	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 ();
      }
    }
}


GdkAtom
gtk_drag_dest_find_target (GtkWidget      *widget,
                           GdkDragContext *context,
                           GtkTargetList  *target_list)
{
1021 1022
  id <NSDraggingInfo> dragging_info;
  NSPasteboard *pasteboard;
Anders Carlsson's avatar
Anders Carlsson committed
1023 1024 1025 1026 1027 1028 1029 1030 1031
  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);
  g_return_val_if_fail (!context->is_source, GDK_NONE);

1032 1033 1034
  dragging_info = gdk_quartz_drag_context_get_dragging_info_libgtk_only (context);
  pasteboard = [dragging_info draggingPasteboard];

Anders Carlsson's avatar
Anders Carlsson committed
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 1062 1063 1064 1065 1066 1067 1068 1069 1070
  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;
}

1071 1072 1073
static gboolean
gtk_drag_begin_idle (gpointer arg)
{
1074
  NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
1075 1076 1077 1078 1079 1080
  GdkDragContext* context = (GdkDragContext*) arg;
  GtkDragSourceInfo* info = gtk_drag_get_source_info (context, FALSE);
  NSWindow *nswindow;
  NSPasteboard *pasteboard;
  GtkDragSourceOwner *owner;
  NSPoint point;
1081
  NSSet *types;
1082
  NSImage *drag_image;
1083 1084 1085 1086 1087 1088

  g_assert (info != NULL);

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

1089 1090 1091 1092
  types = _gtk_quartz_target_list_to_pasteboard_types (info->target_list);

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

1093
  [owner release];
1094
  [types release];
1095 1096 1097 1098 1099 1100 1101 1102 1103 1104

  if ((nswindow = get_toplevel_nswindow (info->source_widget)) == NULL)
     return FALSE;
  
  /* 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];

1105 1106 1107
  drag_image = _gtk_quartz_create_image_from_pixbuf (info->icon_pixbuf);

  [nswindow dragImage:drag_image
1108 1109 1110 1111 1112 1113 1114 1115
                   at:point
               offset:NSMakeSize(0, 0)
                event:info->nsevent
           pasteboard:pasteboard
               source:nswindow
            slideBack:YES];

  [info->nsevent release];
1116
  [drag_image release];
1117

1118 1119
  [pool release];

1120 1121 1122
  return FALSE;
}

Anders Carlsson's avatar
Anders Carlsson committed
1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139
static GdkDragContext *
gtk_drag_begin_internal (GtkWidget         *widget,
			 GtkDragSourceSite *site,
			 GtkTargetList     *target_list,
			 GdkDragAction      actions,
			 gint               button,
			 GdkEvent          *event)
{
  GtkDragSourceInfo *info;
  GdkDragContext *context;
  NSWindow *nswindow;

  context = gdk_drag_begin (NULL, NULL);
  context->is_source = TRUE;

  info = gtk_drag_get_source_info (context, TRUE);
  
1140
  info->source_widget = g_object_ref (widget);
1141
  info->widget = g_object_ref (widget);
Anders Carlsson's avatar
Anders Carlsson committed
1142 1143 1144 1145 1146
  info->target_list = target_list;
  gtk_target_list_ref (target_list);

  info->possible_actions = actions;
  
1147
  g_signal_emit_by_name (widget, "drag-begin", info->context);
Anders Carlsson's avatar
Anders Carlsson committed
1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182

  /* 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)
	gtk_drag_set_icon_default (context);
      else
	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;
	  }
    }

  nswindow = get_toplevel_nswindow (widget);
1183 1184
  info->nsevent = [nswindow currentEvent];
  [info->nsevent retain];
Anders Carlsson's avatar
Anders Carlsson committed
1185

1186
  /* drag will begin in an idle handler to avoid nested run loops */
Anders Carlsson's avatar
Anders Carlsson committed
1187

1188
  g_idle_add_full (G_PRIORITY_HIGH_IDLE, gtk_drag_begin_idle, context, NULL);
Anders Carlsson's avatar
Anders Carlsson committed
1189

1190 1191 1192
  gdk_pointer_ungrab (0);

  return context;
Anders Carlsson's avatar
Anders Carlsson committed
1193 1194 1195 1196 1197 1198 1199 1200 1201 1202
}

GdkDragContext *
gtk_drag_begin (GtkWidget         *widget,
		GtkTargetList     *targets,
		GdkDragAction      actions,
		gint               button,
		GdkEvent          *event)
{
  g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
1203
  g_return_val_if_fail (gtk_widget_get_realized (widget), NULL);
Anders Carlsson's avatar
Anders Carlsson committed
1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298
  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;
}

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;
      
1299
      g_signal_connect (widget, "button-press-event",
Anders Carlsson's avatar
Anders Carlsson committed
1300 1301
			G_CALLBACK (gtk_drag_source_event_cb),
			site);
1302
      g_signal_connect (widget, "button-release-event",
Anders Carlsson's avatar
Anders Carlsson committed
1303 1304
			G_CALLBACK (gtk_drag_source_event_cb),
			site);
1305
      g_signal_connect (widget, "motion-notify-event",
Anders Carlsson's avatar
Anders Carlsson committed
1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 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 1395 1396 1397 1398 1399 1400 1401 1402 1403 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 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 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 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560
			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;
}

/*************************************************************
 * gtk_drag_source_unset
 *     Unregister this widget as a drag source.
 *   arguments:
 *     widget:
 *   results:
 *************************************************************/

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);
    }
}

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;

}

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);
}

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);
}

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);
}

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
1561
 * it to persist, you should connect to the "drag-end" 
Anders Carlsson's avatar
Anders Carlsson committed
1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 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 1624 1625 1626 1627 1628 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
 * 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 (context->is_source);
  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)
    {
      pixbuf = gtk_widget_render_icon (info->widget, stock_id,
				       GTK_ICON_SIZE_DND, NULL);

      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 (context->is_source);
  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 (context->is_source);
  g_return_if_fail (stock_id != NULL);

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

/**
 * 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 (context->is_source);
  g_return_if_fail (icon_name != NULL);