gdkdisplay.c 17.3 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
/* GDK - The GIMP Drawing Kit
 * gdkdisplay.c
 * 
 * Copyright 2001 Sun Microsystems Inc. 
 *
 * Erwann Chenede <erwann.chenede@sun.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library 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.
 */

24
#include <config.h>
25
#include <glib.h>
26
#include "gdk.h"		/* gdk_event_send_client_message() */
27 28
#include "gdkdisplay.h"
#include "gdkinternals.h"
29
#include "gdkmarshalers.h"
30
#include "gdkscreen.h"
31

32 33 34 35 36
enum {
  CLOSED,
  LAST_SIGNAL
};

37 38
static void gdk_display_class_init (GdkDisplayClass *class);
static void gdk_display_init       (GdkDisplay      *display);
39
static void gdk_display_dispose    (GObject         *object);
40 41
static void gdk_display_finalize   (GObject         *object);

42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

void       singlehead_get_pointer        (GdkDisplay       *display,
					  GdkScreen       **screen,
					  gint             *x,
					  gint             *y,
					  GdkModifierType  *mask);
GdkWindow* singlehead_window_get_pointer (GdkDisplay       *display,
					  GdkWindow        *window,
					  gint             *x,
					  gint             *y,
					  GdkModifierType  *mask);
GdkWindow* singlehead_window_at_pointer  (GdkDisplay       *display,
					  gint             *win_x,
					  gint             *win_y);

GdkWindow* singlehead_default_window_get_pointer (GdkWindow       *window,
						  gint            *x,
						  gint            *y,
						  GdkModifierType *mask);
GdkWindow* singlehead_default_window_at_pointer  (GdkScreen       *screen,
						  gint            *win_x,
						  gint            *win_y);

65 66
static guint signals[LAST_SIGNAL] = { 0 };

67
static GObjectClass *parent_class;
68
static char *gdk_sm_client_id;
69

70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88
static const GdkDisplayPointerHooks default_pointer_hooks = {
  _gdk_windowing_get_pointer,
  _gdk_windowing_window_get_pointer,
  _gdk_windowing_window_at_pointer
};

static const GdkDisplayPointerHooks singlehead_pointer_hooks = {
  singlehead_get_pointer,
  singlehead_window_get_pointer,
  singlehead_window_at_pointer
};

static const GdkPointerHooks singlehead_default_pointer_hooks = {
  singlehead_default_window_get_pointer,
  singlehead_default_window_at_pointer
};

static const GdkPointerHooks *singlehead_current_pointer_hooks = &singlehead_default_pointer_hooks;

89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122
GType
gdk_display_get_type (void)
{

  static GType object_type = 0;

  if (!object_type)
    {
      static const GTypeInfo object_info = {
	sizeof (GdkDisplayClass),
	(GBaseInitFunc) NULL,
	(GBaseFinalizeFunc) NULL,
        (GClassInitFunc) gdk_display_class_init,
	NULL,			/* class_finalize */
	NULL,			/* class_data */
	sizeof (GdkDisplay),
	0,			/* n_preallocs */
	(GInstanceInitFunc) gdk_display_init
      };
      object_type = g_type_register_static (G_TYPE_OBJECT,
					    "GdkDisplay", &object_info, 0);
    }

  return object_type;
}

static void
gdk_display_class_init (GdkDisplayClass *class)
{
  GObjectClass *object_class = G_OBJECT_CLASS (class);
  
  parent_class = g_type_class_peek_parent (class);

  object_class->finalize = gdk_display_finalize;
123
  object_class->dispose = gdk_display_dispose;
124

125 126 127 128 129 130 131 132 133 134
  /**
   * GdkDisplay::closed:
   * @display: the object on which the signal is emitted
   * @is_error: %TRUE if the display was closed due to an error
   *
   * The ::closed signal is emitted when the connection to the windowing
   * system for @display is closed.
   *
   * Since: 2.2
   */   
135 136 137 138 139 140 141 142 143 144
  signals[CLOSED] =
    g_signal_new ("closed",
		  G_OBJECT_CLASS_TYPE (object_class),
		  G_SIGNAL_RUN_LAST,
		  G_STRUCT_OFFSET (GdkDisplayClass, closed),
		  NULL, NULL,
		  gdk_marshal_VOID__BOOLEAN,
		  G_TYPE_NONE,
		  1,
		  G_TYPE_BOOLEAN);
145 146 147 148 149 150 151 152 153 154
}

static void
gdk_display_init (GdkDisplay *display)
{
  _gdk_displays = g_slist_prepend (_gdk_displays, display);

  display->button_click_time[0] = display->button_click_time[1] = 0;
  display->button_window[0] = display->button_window[1] = NULL;
  display->button_number[0] = display->button_number[1] = -1;
155 156
  display->button_x[0] = display->button_x[1] = 0;
  display->button_y[0] = display->button_y[1] = 0;
157 158

  display->double_click_time = 250;
159
  display->double_click_distance = 5;
160 161

  display->pointer_hooks = &default_pointer_hooks;
162 163
}

164 165 166 167
static void
gdk_display_dispose (GObject *object)
{
  GdkDisplay *display = GDK_DISPLAY_OBJECT (object);
168 169 170 171 172 173 174 175 176 177

  g_list_foreach (display->queued_events, (GFunc)gdk_event_free, NULL);
  g_list_free (display->queued_events);
  display->queued_events = NULL;
  display->queued_tail = NULL;

  _gdk_displays = g_slist_remove (_gdk_displays, object);

  if (gdk_display_get_default() == display)
    gdk_display_manager_set_default_display (gdk_display_manager_get(), NULL);
178 179

  G_OBJECT_CLASS (parent_class)->dispose (object);
180 181
}

182 183 184
static void
gdk_display_finalize (GObject *object)
{
185
  G_OBJECT_CLASS (parent_class)->finalize (object);
186 187 188 189 190 191
}

/**
 * gdk_display_close:
 * @display: a #GdkDisplay
 *
192
 * Closes the connection to the windowing system for the given display,
193
 * and cleans up associated resources.
Matthias Clasen's avatar
Matthias Clasen committed
194 195
 *
 * Since: 2.2
196 197 198 199 200
 */
void
gdk_display_close (GdkDisplay *display)
{
  g_return_if_fail (GDK_IS_DISPLAY (display));
201 202 203 204

  if (!display->closed)
    {
      display->closed = TRUE;
205 206
      
      g_signal_emit (display, signals[CLOSED], 0, FALSE);
207 208
      g_object_run_dispose (G_OBJECT (display));
      
209
      g_object_unref (display);
210
    }
211 212 213 214 215 216 217 218 219 220 221
}

/**
 * gdk_display_get_event:
 * @display: a #GdkDisplay
 * 
 * Gets the next #GdkEvent to be processed for @display, fetching events from the
 * windowing system if necessary.
 * 
 * Return value: the next #GdkEvent to be processed, or %NULL if no events
 * are pending. The returned #GdkEvent should be freed with gdk_event_free().
Matthias Clasen's avatar
Matthias Clasen committed
222 223
 *
 * Since: 2.2
224 225 226 227 228 229 230 231 232 233 234 235
 **/
GdkEvent*
gdk_display_get_event (GdkDisplay *display)
{
  g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
  
  _gdk_events_queue (display);
  return _gdk_event_unqueue (display);
}

/**
 * gdk_display_peek_event:
Alex Larsson's avatar
Alex Larsson committed
236
 * @display: a #GdkDisplay 
237 238 239 240 241 242
 * 
 * Gets a copy of the first #GdkEvent in the @display's event queue, without
 * removing the event from the queue.  (Note that this function will
 * not get more events from the windowing system.  It only checks the events
 * that have already been moved to the GDK event queue.)
 * 
Matthias Clasen's avatar
Matthias Clasen committed
243 244
 * Return value: a copy of the first #GdkEvent on the event queue, or %NULL 
 * if no events are in the queue. The returned #GdkEvent should be freed with
245
 * gdk_event_free().
Matthias Clasen's avatar
Matthias Clasen committed
246 247
 *
 * Since: 2.2
248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270
 **/
GdkEvent*
gdk_display_peek_event (GdkDisplay *display)
{
  GList *tmp_list;

  g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);

  tmp_list = _gdk_event_queue_find_first (display);
  
  if (tmp_list)
    return gdk_event_copy (tmp_list->data);
  else
    return NULL;
}

/**
 * gdk_display_put_event:
 * @display: a #GdkDisplay
 * @event: a #GdkEvent.
 *
 * Appends a copy of the given event onto the front of the event
 * queue for @display.
Matthias Clasen's avatar
Matthias Clasen committed
271 272
 *
 * Since: 2.2
273 274 275 276 277 278 279 280 281 282
 **/
void
gdk_display_put_event (GdkDisplay *display,
		       GdkEvent   *event)
{
  g_return_if_fail (GDK_IS_DISPLAY (display));
  g_return_if_fail (event != NULL);

  _gdk_event_queue_append (display, gdk_event_copy (event));
}
283 284 285

/**
 * gdk_pointer_ungrab:
Matthias Clasen's avatar
Matthias Clasen committed
286 287
 * @time_: a timestamp from a #GdkEvent, or %GDK_CURRENT_TIME if no 
 *  timestamp is available.
288
 *
289 290 291 292 293
 * Ungrabs the pointer, if it is grabbed by this application.
 **/
void
gdk_pointer_ungrab (guint32 time)
{
Owen Taylor's avatar
Owen Taylor committed
294
  gdk_display_pointer_ungrab (gdk_display_get_default (), time);
295 296 297 298 299 300 301 302 303 304 305 306 307 308 309
}

/**
 * gdk_pointer_is_grabbed:
 * 
 * Returns %TRUE if the pointer is currently grabbed by this application.
 *
 * Note that this does not take the inmplicit pointer grab on button
 * presses into account.

 * Return value: %TRUE if the pointer is currently grabbed by this application.* 
 **/
gboolean
gdk_pointer_is_grabbed (void)
{
Owen Taylor's avatar
Owen Taylor committed
310
  return gdk_display_pointer_is_grabbed (gdk_display_get_default ());
311 312 313 314
}

/**
 * gdk_keyboard_ungrab:
315
 * @time_: a timestamp from a #GdkEvent, or %GDK_CURRENT_TIME if no
316 317 318 319 320 321 322
 *        timestamp is available.
 * 
 * Ungrabs the keyboard, if it is grabbed by this application.
 **/
void
gdk_keyboard_ungrab (guint32 time)
{
Owen Taylor's avatar
Owen Taylor committed
323
  gdk_display_keyboard_ungrab (gdk_display_get_default (), time);
324 325 326 327 328 329 330 331 332 333
}

/**
 * gdk_beep:
 * 
 * Emits a short beep.
 **/
void
gdk_beep (void)
{
Owen Taylor's avatar
Owen Taylor committed
334
  gdk_display_beep (gdk_display_get_default ());
335 336 337 338 339
}

/**
 * gdk_event_send_client_message:
 * @event: the #GdkEvent to send, which should be a #GdkEventClient.
Owen Taylor's avatar
Owen Taylor committed
340
 * @winid:  the window to send the X ClientMessage event to.
341 342 343 344 345 346 347 348 349
 * 
 * Sends an X ClientMessage event to a given window (which must be
 * on the default #GdkDisplay.)
 * This could be used for communicating between different applications,
 * though the amount of data is limited to 20 bytes.
 * 
 * Return value: non-zero on success.
 **/
gboolean
Owen Taylor's avatar
Owen Taylor committed
350 351
gdk_event_send_client_message (GdkEvent        *event,
			       GdkNativeWindow  winid)
352 353 354
{
  g_return_val_if_fail (event != NULL, FALSE);

Owen Taylor's avatar
Owen Taylor committed
355
  return gdk_event_send_client_message_for_display (gdk_display_get_default (),
Owen Taylor's avatar
Owen Taylor committed
356
						    event, winid);
357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375
}

/**
 * gdk_event_send_clientmessage_toall:
 * @event: the #GdkEvent to send, which should be a #GdkEventClient.
 *
 * Sends an X ClientMessage event to all toplevel windows on the default
 * #GdkScreen.
 *
 * Toplevel windows are determined by checking for the WM_STATE property, as
 * described in the Inter-Client Communication Conventions Manual (ICCCM).
 * If no windows are found with the WM_STATE property set, the message is sent
 * to all children of the root window.
 **/
void
gdk_event_send_clientmessage_toall (GdkEvent *event)
{
  g_return_if_fail (event != NULL);

Owen Taylor's avatar
Owen Taylor committed
376
  gdk_screen_broadcast_client_message (gdk_screen_get_default (), event);
377 378
}

379 380 381 382 383 384 385 386 387 388 389
/**
 * gdk_device_get_core_pointer:
 * 
 * Returns the core pointer device for the default display.
 * 
 * Return value: the core pointer device; this is owned by the
 *   display and should not be freed.
 **/
GdkDevice *
gdk_device_get_core_pointer (void)
{
Owen Taylor's avatar
Owen Taylor committed
390
  return gdk_display_get_core_pointer (gdk_display_get_default ());
391 392 393 394 395 396 397 398 399 400
}

/**
 * gdk_display_get_core_pointer:
 * @display: a #GdkDisplay
 * 
 * Returns the core pointer device for the given display
 * 
 * Return value: the core pointer device; this is owned by the
 *   display and should not be freed.
Matthias Clasen's avatar
Matthias Clasen committed
401 402
 *
 * Since: 2.2
403 404 405 406 407 408
 **/
GdkDevice *
gdk_display_get_core_pointer (GdkDisplay *display)
{
  return display->core_pointer;
}
409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426

/**
 * gdk_set_sm_client_id:
 * @sm_client_id: the client id assigned by the session manager when the
 *    connection was opened, or %NULL to remove the property.
 * 
 * Sets the <literal>SM_CLIENT_ID</literal> property on the application's leader window so that
 * the window manager can save the application's state using the X11R6 ICCCM
 * session management protocol.
 *
 * See the X Session Management Library documentation for more information on
 * session management and the Inter-Client Communication Conventions Manual
 * (ICCCM) for information on the <literal>WM_CLIENT_LEADER</literal> property. 
 * (Both documents are part of the X Window System distribution.)
 **/
void
gdk_set_sm_client_id (const gchar* sm_client_id)
{
427 428 429 430 431 432 433 434 435 436
  GSList *displays, *tmp_list;
  
  g_free (gdk_sm_client_id);
  gdk_sm_client_id = g_strdup (sm_client_id);

  displays = gdk_display_manager_list_displays (gdk_display_manager_get ());
  for (tmp_list = displays; tmp_list; tmp_list = tmp_list->next)
    _gdk_windowing_display_set_sm_client_id (tmp_list->data, sm_client_id);

  g_slist_free (displays);
437 438
}

439 440 441 442 443 444 445 446 447 448 449 450 451
/**
 * _gdk_get_sm_client_id:
 * 
 * Gets the client ID set with gdk_set_sm_client_id(), if any.
 * 
 * Return value: Session ID, or %NULL if gdk_set_sm_client_id()
 *               has never been called.
 **/
const char *
_gdk_get_sm_client_id (void)
{
  return gdk_sm_client_id;
}
452 453 454 455 456 457 458 459 460 461 462 463

/**
 * gdk_display_get_pointer:
 * @display: a #GdkDisplay
 * @screen: location to store the screen that the
 *          cursor is on, or %NULL.
 * @x: location to store root window X coordinate of pointer, or %NULL.
 * @y: location to store root window Y coordinate of pointer, or %NULL.
 * @mask: location to store current modifier mask, or %NULL
 * 
 * Gets the current location of the pointer and the current modifier
 * mask for a given display.
Matthias Clasen's avatar
Matthias Clasen committed
464 465
 *
 * Since: 2.2
466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503
 **/
void
gdk_display_get_pointer (GdkDisplay      *display,
			 GdkScreen      **screen,
			 gint            *x,
			 gint            *y,
			 GdkModifierType *mask)
{
  GdkScreen *tmp_screen;
  gint tmp_x, tmp_y;
  GdkModifierType tmp_mask;
  
  g_return_if_fail (GDK_IS_DISPLAY (display));

  display->pointer_hooks->get_pointer (display, &tmp_screen, &tmp_x, &tmp_y, &tmp_mask);

  if (screen)
    *screen = tmp_screen;
  if (x)
    *x = tmp_x;
  if (y)
    *y = tmp_y;
  if (mask)
    *mask = tmp_mask;
}

/**
 * gdk_display_get_window_at_pointer:
 * @display: a #GdkDisplay
 * @win_x: return location for origin of the window under the pointer
 * @win_y: return location for origin of the window under the pointer
 * 
 * Obtains the window underneath the mouse pointer, returning the location
 * of that window in @win_x, @win_y for @screen. Returns %NULL if the window 
 * under the mouse pointer is not known to GDK (for example, belongs to
 * another application).
 * 
 * Returns: the window under the mouse pointer, or %NULL
Matthias Clasen's avatar
Matthias Clasen committed
504 505
 *
 * Since: 2.2
506 507 508 509 510 511 512
 **/
GdkWindow *
gdk_display_get_window_at_pointer (GdkDisplay *display,
				   gint       *win_x,
				   gint       *win_y)
{
  gint tmp_x, tmp_y;
Kristian Rietveld's avatar
Kristian Rietveld committed
513
  GdkWindow *window;
514 515

  g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
Kristian Rietveld's avatar
Kristian Rietveld committed
516 517

  window = display->pointer_hooks->window_at_pointer (display, &tmp_x, &tmp_y);
518 519 520 521 522

  if (win_x)
    *win_x = tmp_x;
  if (win_y)
    *win_y = tmp_y;
Kristian Rietveld's avatar
Kristian Rietveld committed
523 524

  return window;
525 526 527 528
}

/**
 * gdk_display_set_pointer_hooks:
Matthias Clasen's avatar
Matthias Clasen committed
529
 * @display: a #GdkDisplay
530 531 532 533 534 535 536 537 538 539 540
 * @new_hooks: a table of pointers to functions for getting
 *   quantities related to the current pointer position,
 *   or %NULL to restore the default table.
 * 
 * This function allows for hooking into the operation
 * of getting the current location of the pointer on a particular
 * display. This is only useful for such low-level tools as an
 * event recorder. Applications should never have any
 * reason to use this facility.
 *
 * Return value: the previous pointer hook table
Matthias Clasen's avatar
Matthias Clasen committed
541 542
 *
 * Since: 2.2
543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649
 **/
GdkDisplayPointerHooks *
gdk_display_set_pointer_hooks (GdkDisplay                   *display,
			       const GdkDisplayPointerHooks *new_hooks)
{
  const GdkDisplayPointerHooks *result;

  g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
  result = display->pointer_hooks;

  if (new_hooks)
    display->pointer_hooks = new_hooks;
  else
    display->pointer_hooks = &default_pointer_hooks;

  return (GdkDisplayPointerHooks *)result;
}

void
singlehead_get_pointer (GdkDisplay       *display,
			GdkScreen       **screen,
			gint             *x,
			gint             *y,
			GdkModifierType  *mask)
{
  GdkScreen *default_screen = gdk_display_get_default_screen (display);
  GdkWindow *root_window = gdk_screen_get_root_window (default_screen);

  *screen = default_screen;

  singlehead_current_pointer_hooks->get_pointer (root_window, x, y, mask);
}

GdkWindow*
singlehead_window_get_pointer (GdkDisplay       *display,
			       GdkWindow        *window,
			       gint             *x,
			       gint             *y,
			       GdkModifierType  *mask)
{
  return singlehead_current_pointer_hooks->get_pointer (window, x, y, mask);
}

GdkWindow*
singlehead_window_at_pointer   (GdkDisplay *display,
				gint       *win_x,
				gint       *win_y)
{
  GdkScreen *default_screen = gdk_display_get_default_screen (display);

  return singlehead_current_pointer_hooks->window_at_pointer (default_screen,
							      win_x, win_y);
}

GdkWindow*
singlehead_default_window_get_pointer (GdkWindow       *window,
				       gint            *x,
				       gint            *y,
				       GdkModifierType *mask)
{
  return _gdk_windowing_window_get_pointer (gdk_drawable_get_display (window),
					    window, x, y, mask);
}

GdkWindow*
singlehead_default_window_at_pointer  (GdkScreen       *screen,
				       gint            *win_x,
				       gint            *win_y)
{
  return _gdk_windowing_window_at_pointer (gdk_screen_get_display (screen),
					   win_x, win_y);
}

/**
 * gdk_set_pointer_hooks:
 * @new_hooks: a table of pointers to functions for getting
 *   quantities related to the current pointer position,
 *   or %NULL to restore the default table.
 * 
 * This function allows for hooking into the operation
 * of getting the current location of the pointer. This
 * is only useful for such low-level tools as an
 * event recorder. Applications should never have any
 * reason to use this facility.
 *
 * This function is not multihead safe. For multihead operation,
 * see gdk_display_set_pointer_hooks().
 * 
 * Return value: the previous pointer hook table
 **/
GdkPointerHooks *
gdk_set_pointer_hooks (const GdkPointerHooks *new_hooks)
{
  const GdkPointerHooks *result = singlehead_current_pointer_hooks;

  if (new_hooks)
    singlehead_current_pointer_hooks = new_hooks;
  else
    singlehead_current_pointer_hooks = &singlehead_default_pointer_hooks;

  gdk_display_set_pointer_hooks (gdk_display_get_default (),
				 &singlehead_pointer_hooks);
  
  return (GdkPointerHooks *)result;
}