1 /* GDK - The GIMP Drawing Kit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
19 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
20 * file for a list of people on the GTK+ Team. See the ChangeLog
21 * files for a list of changes. These files are distributed with
22 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
27 #define GDK_DISABLE_DEPRECATION_WARNINGS 1
31 #include "gdkinternals.h"
34 #ifndef HAVE_XCONVERTCASE
35 #include "gdkkeysyms.h"
44 * @Short_description: Library initialization and miscellaneous functions
47 * This section describes the GDK initialization functions and miscellaneous
48 * utility functions, as well as deprecation facilities.
50 * The GDK and GTK+ headers annotate deprecated APIs in a way that produces
51 * compiler warnings if these deprecated APIs are used. The warnings
52 * can be turned off by defining the macro %GDK_DISABLE_DEPRECATION_WARNINGS
53 * before including the glib.h header.
55 * GDK and GTK+ also provide support for building applications against
56 * defined subsets of deprecated or new APIs. Define the macro
57 * %GDK_VERSION_MIN_REQUIRED to specify up to what version
58 * you want to receive warnings about deprecated APIs. Define the
59 * macro %GDK_VERSION_MAX_ALLOWED to specify the newest version
60 * whose API you want to use.
66 * The #GDK_WINDOWING_X11 macro is defined if the X11 backend
69 * Use this macro to guard code that is specific to the X11 backend.
73 * GDK_WINDOWING_WIN32:
75 * The #GDK_WINDOWING_WIN32 macro is defined if the Win32 backend
78 * Use this macro to guard code that is specific to the Win32 backend.
82 * GDK_WINDOWING_QUARTZ:
84 * The #GDK_WINDOWING_QUARTZ macro is defined if the Quartz backend
87 * Use this macro to guard code that is specific to the Quartz backend.
91 * GDK_DISABLE_DEPRECATION_WARNINGS:
93 * A macro that should be defined before including the gdk.h header.
94 * If it is defined, no compiler warnings will be produced for uses
95 * of deprecated GDK APIs.
98 typedef struct _GdkPredicate GdkPredicate;
106 typedef struct _GdkThreadsDispatch GdkThreadsDispatch;
108 struct _GdkThreadsDispatch
112 GDestroyNotify destroy;
116 /* Private variable declarations
118 static int gdk_initialized = 0; /* 1 if the library is initialized,
122 static gchar *gdk_progclass = NULL;
124 static GMutex gdk_threads_mutex;
126 static GCallback gdk_threads_lock = NULL;
127 static GCallback gdk_threads_unlock = NULL;
129 #ifdef G_ENABLE_DEBUG
130 static const GDebugKey gdk_debug_keys[] = {
131 {"events", GDK_DEBUG_EVENTS},
132 {"misc", GDK_DEBUG_MISC},
133 {"dnd", GDK_DEBUG_DND},
134 {"xim", GDK_DEBUG_XIM},
135 {"nograbs", GDK_DEBUG_NOGRABS},
136 {"input", GDK_DEBUG_INPUT},
137 {"cursor", GDK_DEBUG_CURSOR},
138 {"multihead", GDK_DEBUG_MULTIHEAD},
139 {"xinerama", GDK_DEBUG_XINERAMA},
140 {"draw", GDK_DEBUG_DRAW},
141 {"eventloop", GDK_DEBUG_EVENTLOOP}
145 gdk_arg_debug_cb (const char *key, const char *value, gpointer user_data, GError **error)
147 guint debug_value = g_parse_debug_string (value,
148 (GDebugKey *) gdk_debug_keys,
149 G_N_ELEMENTS (gdk_debug_keys));
151 if (debug_value == 0 && value != NULL && strcmp (value, "") != 0)
154 G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
155 _("Error parsing option --gdk-debug"));
159 _gdk_debug_flags |= debug_value;
165 gdk_arg_no_debug_cb (const char *key, const char *value, gpointer user_data, GError **error)
167 guint debug_value = g_parse_debug_string (value,
168 (GDebugKey *) gdk_debug_keys,
169 G_N_ELEMENTS (gdk_debug_keys));
171 if (debug_value == 0 && value != NULL && strcmp (value, "") != 0)
174 G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
175 _("Error parsing option --gdk-no-debug"));
179 _gdk_debug_flags &= ~debug_value;
183 #endif /* G_ENABLE_DEBUG */
186 gdk_arg_class_cb (const char *key, const char *value, gpointer user_data, GError **error)
188 gdk_set_program_class (value);
194 gdk_arg_name_cb (const char *key, const char *value, gpointer user_data, GError **error)
196 g_set_prgname (value);
201 static const GOptionEntry gdk_args[] = {
202 { "class", 0, 0, G_OPTION_ARG_CALLBACK, gdk_arg_class_cb,
203 /* Description of --class=CLASS in --help output */ N_("Program class as used by the window manager"),
204 /* Placeholder in --class=CLASS in --help output */ N_("CLASS") },
205 { "name", 0, 0, G_OPTION_ARG_CALLBACK, gdk_arg_name_cb,
206 /* Description of --name=NAME in --help output */ N_("Program name as used by the window manager"),
207 /* Placeholder in --name=NAME in --help output */ N_("NAME") },
208 { "display", 0, G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_STRING, &_gdk_display_name,
209 /* Description of --display=DISPLAY in --help output */ N_("X display to use"),
210 /* Placeholder in --display=DISPLAY in --help output */ N_("DISPLAY") },
211 #ifdef G_ENABLE_DEBUG
212 { "gdk-debug", 0, 0, G_OPTION_ARG_CALLBACK, gdk_arg_debug_cb,
213 /* Description of --gdk-debug=FLAGS in --help output */ N_("GDK debugging flags to set"),
214 /* Placeholder in --gdk-debug=FLAGS in --help output */ N_("FLAGS") },
215 { "gdk-no-debug", 0, 0, G_OPTION_ARG_CALLBACK, gdk_arg_no_debug_cb,
216 /* Description of --gdk-no-debug=FLAGS in --help output */ N_("GDK debugging flags to unset"),
217 /* Placeholder in --gdk-no-debug=FLAGS in --help output */ N_("FLAGS") },
223 * gdk_add_option_entries_libgtk_only:
224 * @group: An option group.
226 * Appends gdk option entries to the passed in option group. This is
227 * not public API and must not be used by applications.
230 gdk_add_option_entries_libgtk_only (GOptionGroup *group)
232 g_option_group_add_entries (group, gdk_args);
236 gdk_pre_parse_libgtk_only (void)
238 const char *rendering_mode;
240 gdk_initialized = TRUE;
242 /* We set the fallback program class here, rather than lazily in
243 * gdk_get_program_class, since we don't want -name to override it.
245 gdk_progclass = g_strdup (g_get_prgname ());
246 if (gdk_progclass && gdk_progclass[0])
247 gdk_progclass[0] = g_ascii_toupper (gdk_progclass[0]);
249 #ifdef G_ENABLE_DEBUG
251 gchar *debug_string = getenv("GDK_DEBUG");
252 if (debug_string != NULL)
253 _gdk_debug_flags = g_parse_debug_string (debug_string,
254 (GDebugKey *) gdk_debug_keys,
255 G_N_ELEMENTS (gdk_debug_keys));
257 #endif /* G_ENABLE_DEBUG */
259 if (getenv ("GDK_NATIVE_WINDOWS"))
261 g_warning ("The GDK_NATIVE_WINDOWS environment variable is not supported in GTK3.\n"
262 "See the documentation for gdk_window_ensure_native() on how to get native windows.");
263 g_unsetenv ("GDK_NATIVE_WINDOWS");
266 rendering_mode = g_getenv ("GDK_RENDERING");
269 if (g_str_equal (rendering_mode, "similar"))
270 _gdk_rendering_mode = GDK_RENDERING_MODE_SIMILAR;
271 else if (g_str_equal (rendering_mode, "image"))
272 _gdk_rendering_mode = GDK_RENDERING_MODE_IMAGE;
273 else if (g_str_equal (rendering_mode, "recording"))
274 _gdk_rendering_mode = GDK_RENDERING_MODE_RECORDING;
277 /* Do any setup particular to the windowing system */
278 gdk_display_manager_get ();
284 * @argc: the number of command line arguments.
285 * @argv: (inout) (array length=argc): the array of command line arguments.
287 * Parse command line arguments, and store for future
288 * use by calls to gdk_display_open().
290 * Any arguments used by GDK are removed from the array and @argc and @argv are
291 * updated accordingly.
293 * You shouldn't call this function explicitely if you are using
294 * gtk_init(), gtk_init_check(), gdk_init(), or gdk_init_check().
299 gdk_parse_args (int *argc,
302 GOptionContext *option_context;
303 GOptionGroup *option_group;
304 GError *error = NULL;
309 gdk_pre_parse_libgtk_only ();
311 option_context = g_option_context_new (NULL);
312 g_option_context_set_ignore_unknown_options (option_context, TRUE);
313 g_option_context_set_help_enabled (option_context, FALSE);
314 option_group = g_option_group_new (NULL, NULL, NULL, NULL, NULL);
315 g_option_context_set_main_group (option_context, option_group);
317 g_option_group_add_entries (option_group, gdk_args);
319 if (!g_option_context_parse (option_context, argc, argv, &error))
321 g_warning ("%s", error->message);
322 g_error_free (error);
324 g_option_context_free (option_context);
326 GDK_NOTE (MISC, g_message ("progname: \"%s\"", g_get_prgname ()));
330 * gdk_get_display_arg_name:
332 * Gets the display name specified in the command line arguments passed
333 * to gdk_init() or gdk_parse_args(), if any.
335 * Returns: the display name, if specified explicitely, otherwise %NULL
336 * this string is owned by GTK+ and must not be modified or freed.
341 gdk_get_display_arg_name (void)
343 if (!_gdk_display_arg_name)
344 _gdk_display_arg_name = g_strdup (_gdk_display_name);
346 return _gdk_display_arg_name;
350 * gdk_display_open_default_libgtk_only:
352 * Opens the default display specified by command line arguments or
353 * environment variables, sets it as the default display, and returns
354 * it. gdk_parse_args must have been called first. If the default
355 * display has previously been set, simply returns that. An internal
356 * function that should not be used by applications.
358 * Return value: (transfer none): the default display, if it could be
359 * opened, otherwise %NULL.
362 gdk_display_open_default_libgtk_only (void)
366 g_return_val_if_fail (gdk_initialized, NULL);
368 display = gdk_display_get_default ();
372 display = gdk_display_open (gdk_get_display_arg_name ());
379 * @argc: (inout): the number of command line arguments.
380 * @argv: (array length=argc) (inout): the array of command line arguments.
382 * Initializes the GDK library and connects to the windowing system,
383 * returning %TRUE on success.
385 * Any arguments used by GDK are removed from the array and @argc and @argv
386 * are updated accordingly.
388 * GTK+ initializes GDK in gtk_init() and so this function is not usually
389 * needed by GTK+ applications.
391 * Returns: %TRUE if initialization succeeded.
394 gdk_init_check (int *argc,
397 gdk_parse_args (argc, argv);
399 return gdk_display_open_default_libgtk_only () != NULL;
405 * @argc: (inout): the number of command line arguments.
406 * @argv: (array length=argc) (inout): the array of command line arguments.
408 * Initializes the GDK library and connects to the windowing system.
409 * If initialization fails, a warning message is output and the application
410 * terminates with a call to <literal>exit(1)</literal>.
412 * Any arguments used by GDK are removed from the array and @argc and @argv
413 * are updated accordingly.
415 * GTK+ initializes GDK in gtk_init() and so this function is not usually
416 * needed by GTK+ applications.
419 gdk_init (int *argc, char ***argv)
421 if (!gdk_init_check (argc, argv))
423 const char *display_name = gdk_get_display_arg_name ();
424 g_warning ("cannot open display: %s", display_name ? display_name : "");
433 * @Short_description: Functions for using GDK in multi-threaded programs
436 * For thread safety, GDK relies on the thread primitives in GLib,
437 * and on the thread-safe GLib main loop.
439 * GLib is completely thread safe (all global data is automatically
440 * locked), but individual data structure instances are not automatically
441 * locked for performance reasons. So e.g. you must coordinate
442 * accesses to the same #GHashTable from multiple threads.
444 * GTK+ is "thread aware" but not thread safe — it provides a
445 * global lock controlled by gdk_threads_enter()/gdk_threads_leave()
446 * which protects all use of GTK+. That is, only one thread can use GTK+
449 * You must call gdk_threads_init() before executing any other GTK+ or
450 * GDK functions in a threaded GTK+ program.
452 * Idles, timeouts, and input functions from GLib, such as g_idle_add(),
453 * are executed outside of the main GTK+ lock. So, if you need to call
454 * GTK+ inside of such a callback, you must surround the callback with
455 * a gdk_threads_enter()/gdk_threads_leave() pair or use
456 * gdk_threads_add_idle_full() which does this for you.
457 * However, event dispatching from the mainloop is still executed within
458 * the main GTK+ lock, so callback functions connected to event signals
459 * like #GtkWidget::button-press-event, do not need thread protection.
461 * In particular, this means, if you are writing widgets that might
462 * be used in threaded programs, you <emphasis>must</emphasis> surround
463 * timeouts and idle functions in this matter.
465 * As always, you must also surround any calls to GTK+ not made within
466 * a signal handler with a gdk_threads_enter()/gdk_threads_leave() pair.
468 * Before calling gdk_threads_leave() from a thread other
469 * than your main thread, you probably want to call gdk_flush()
470 * to send all pending commands to the windowing system.
471 * (The reason you don't need to do this from the main thread
472 * is that GDK always automatically flushes pending commands
473 * when it runs out of incoming events to process and has
474 * to sleep while waiting for more events.)
476 * A minimal main program for a threaded GTK+ application
479 * <programlisting role="C">
481 * main (int argc, char *argv[])
485 * gdk_threads_init (<!-- -->);
486 * gdk_threads_enter (<!-- -->);
488 * gtk_init (&argc, &argv);
490 * window = create_window (<!-- -->);
491 * gtk_widget_show (window);
493 * gtk_main (<!-- -->);
494 * gdk_threads_leave (<!-- -->);
501 * Callbacks require a bit of attention. Callbacks from GTK+ signals
502 * are made within the GTK+ lock. However callbacks from GLib (timeouts,
503 * IO callbacks, and idle functions) are made outside of the GTK+
504 * lock. So, within a signal handler you do not need to call
505 * gdk_threads_enter(), but within the other types of callbacks, you
508 * Erik Mouw contributed the following code example to
509 * illustrate how to use threads within GTK+ programs.
511 * <programlisting role="C">
512 * /<!---->*-------------------------------------------------------------------------
513 * * Filename: gtk-thread.c
515 * * Copyright: Copyright (C) 1999, Erik Mouw
516 * * Author: Erik Mouw <J.A.K.Mouw@its.tudelft.nl>
517 * * Description: GTK threads example.
518 * * Created at: Sun Oct 17 21:27:09 1999
519 * * Modified by: Erik Mouw <J.A.K.Mouw@its.tudelft.nl>
520 * * Modified at: Sun Oct 24 17:21:41 1999
521 * *-----------------------------------------------------------------------*<!---->/
525 * * cc -o gtk-thread gtk-thread.c `gtk-config --cflags --libs gthread`
527 * * Thanks to Sebastian Wilhelmi and Owen Taylor for pointing out some
533 * #include <stdlib.h>
534 * #include <unistd.h>
536 * #include <gtk/gtk.h>
538 * #include <pthread.h>
540 * #define YES_IT_IS (1)
541 * #define NO_IT_IS_NOT (0)
549 * G_LOCK_DEFINE_STATIC (yes_or_no);
550 * static volatile int yes_or_no = YES_IT_IS;
552 * void destroy (GtkWidget *widget, gpointer data)
554 * gtk_main_quit (<!-- -->);
557 * void *argument_thread (void *args)
559 * yes_or_no_args *data = (yes_or_no_args *)args;
560 * gboolean say_something;
564 * /<!---->* sleep a while *<!---->/
565 * sleep(rand(<!-- -->) / (RAND_MAX / 3) + 1);
567 * /<!---->* lock the yes_or_no_variable *<!---->/
570 * /<!---->* do we have to say something? *<!---->/
571 * say_something = (yes_or_no != data->what);
575 * /<!---->* set the variable *<!---->/
576 * yes_or_no = data->what;
579 * /<!---->* Unlock the yes_or_no variable *<!---->/
580 * G_UNLOCK (yes_or_no);
584 * /<!---->* get GTK thread lock *<!---->/
585 * gdk_threads_enter (<!-- -->);
587 * /<!---->* set label text *<!---->/
588 * if(data->what == YES_IT_IS)
589 * gtk_label_set_text (GTK_LABEL (data->label), "O yes, it is!");
591 * gtk_label_set_text (GTK_LABEL (data->label), "O no, it isn't!");
593 * /<!---->* release GTK thread lock *<!---->/
594 * gdk_threads_leave (<!-- -->);
601 * int main (int argc, char *argv[])
605 * yes_or_no_args yes_args, no_args;
606 * pthread_t no_tid, yes_tid;
608 * /<!---->* init threads *<!---->/
609 * gdk_threads_init (<!-- -->);
610 * gdk_threads_enter (<!-- -->);
612 * /<!---->* init gtk *<!---->/
613 * gtk_init(&argc, &argv);
615 * /<!---->* init random number generator *<!---->/
616 * srand ((unsigned int) time (NULL));
618 * /<!---->* create a window *<!---->/
619 * window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
621 * g_signal_connect (window, "destroy", G_CALLBACK (destroy), NULL);
623 * gtk_container_set_border_width (GTK_CONTAINER (window), 10);
625 * /<!---->* create a label *<!---->/
626 * label = gtk_label_new ("And now for something completely different ...");
627 * gtk_container_add (GTK_CONTAINER (window), label);
629 * /<!---->* show everything *<!---->/
630 * gtk_widget_show (label);
631 * gtk_widget_show (window);
633 * /<!---->* create the threads *<!---->/
634 * yes_args.label = label;
635 * yes_args.what = YES_IT_IS;
636 * pthread_create (&yes_tid, NULL, argument_thread, &yes_args);
638 * no_args.label = label;
639 * no_args.what = NO_IT_IS_NOT;
640 * pthread_create (&no_tid, NULL, argument_thread, &no_args);
642 * /<!---->* enter the GTK main loop *<!---->/
643 * gtk_main (<!-- -->);
644 * gdk_threads_leave (<!-- -->);
651 * Unfortunately, all of the above documentation holds with the X11
652 * backend only. With the Win32 backend, GDK and GTK+ calls should not
653 * be attempted from multiple threads at all. Combining the GDK lock
654 * with other locks such as the Python global interpreter lock can be
657 * For these reason, the threading support has been deprecated in
658 * GTK+ 3.6. Instead of calling GTK+ directly from multiple threads,
659 * it is recommended to use g_idle_add(), g_main_context_invoke()
660 * and similar functions to make these calls from the main thread
661 * instead. The main thread is the thread which has called gtk_init()
662 * and is running the GTK+ mainloop. GTK+ itself will continue to
663 * use the GDK lock internally as long as the deprecated functionality
664 * is still available, and other libraries should probably do the same.
671 * This function marks the beginning of a critical section in which
672 * GDK and GTK+ functions can be called safely and without causing race
673 * conditions. Only one thread at a time can be in such a critial
676 * Deprecated:3.6: All GDK and GTK+ calls should be made from the main
680 gdk_threads_enter (void)
682 if (gdk_threads_lock)
683 (*gdk_threads_lock) ();
689 * Leaves a critical region begun with gdk_threads_enter().
691 * Deprecated:3.6: All GDK and GTK+ calls should be made from the main
695 gdk_threads_leave (void)
697 if (gdk_threads_unlock)
698 (*gdk_threads_unlock) ();
702 gdk_threads_impl_lock (void)
704 g_mutex_lock (&gdk_threads_mutex);
708 gdk_threads_impl_unlock (void)
710 g_mutex_unlock (&gdk_threads_mutex);
716 * Initializes GDK so that it can be used from multiple threads
717 * in conjunction with gdk_threads_enter() and gdk_threads_leave().
719 * This call must be made before any use of the main loop from
720 * GTK+; to be safe, call it before gtk_init().
722 * Deprecated:3.6: All GDK and GTK+ calls should be made from the main
726 gdk_threads_init (void)
728 if (!gdk_threads_lock)
729 gdk_threads_lock = gdk_threads_impl_lock;
730 if (!gdk_threads_unlock)
731 gdk_threads_unlock = gdk_threads_impl_unlock;
735 * gdk_threads_set_lock_functions: (skip)
736 * @enter_fn: function called to guard GDK
737 * @leave_fn: function called to release the guard
739 * Allows the application to replace the standard method that
740 * GDK uses to protect its data structures. Normally, GDK
741 * creates a single #GMutex that is locked by gdk_threads_enter(),
742 * and released by gdk_threads_leave(); using this function an
743 * application provides, instead, a function @enter_fn that is
744 * called by gdk_threads_enter() and a function @leave_fn that is
745 * called by gdk_threads_leave().
747 * The functions must provide at least same locking functionality
748 * as the default implementation, but can also do extra application
749 * specific processing.
751 * As an example, consider an application that has its own recursive
752 * lock that when held, holds the GTK+ lock as well. When GTK+ unlocks
753 * the GTK+ lock when entering a recursive main loop, the application
754 * must temporarily release its lock as well.
756 * Most threaded GTK+ apps won't need to use this method.
758 * This method must be called before gdk_threads_init(), and cannot
759 * be called multiple times.
761 * Deprecated:3.6: All GDK and GTK+ calls should be made from the main
767 gdk_threads_set_lock_functions (GCallback enter_fn,
770 g_return_if_fail (gdk_threads_lock == NULL &&
771 gdk_threads_unlock == NULL);
773 gdk_threads_lock = enter_fn;
774 gdk_threads_unlock = leave_fn;
778 gdk_threads_dispatch (gpointer data)
780 GdkThreadsDispatch *dispatch = data;
781 gboolean ret = FALSE;
783 gdk_threads_enter ();
785 if (!g_source_is_destroyed (g_main_current_source ()))
786 ret = dispatch->func (dispatch->data);
788 gdk_threads_leave ();
794 gdk_threads_dispatch_free (gpointer data)
796 GdkThreadsDispatch *dispatch = data;
798 if (dispatch->destroy && dispatch->data)
799 dispatch->destroy (dispatch->data);
801 g_slice_free (GdkThreadsDispatch, data);
806 * gdk_threads_add_idle_full:
807 * @priority: the priority of the idle source. Typically this will be in the
808 * range between #G_PRIORITY_DEFAULT_IDLE and #G_PRIORITY_HIGH_IDLE
809 * @function: function to call
810 * @data: data to pass to @function
811 * @notify: (allow-none): function to call when the idle is removed, or %NULL
813 * Adds a function to be called whenever there are no higher priority
814 * events pending. If the function returns %FALSE it is automatically
815 * removed from the list of event sources and will not be called again.
817 * This variant of g_idle_add_full() calls @function with the GDK lock
818 * held. It can be thought of a MT-safe version for GTK+ widgets for the
819 * following use case, where you have to worry about idle_callback()
820 * running in thread A and accessing @self after it has been finalized
825 * idle_callback (gpointer data)
827 * /* gdk_threads_enter(); would be needed for g_idle_add() */
829 * SomeWidget *self = data;
830 * /* do stuff with self */
834 * /* gdk_threads_leave(); would be needed for g_idle_add() */
839 * some_widget_do_stuff_later (SomeWidget *self)
841 * self->idle_id = gdk_threads_add_idle (idle_callback, self)
842 * /* using g_idle_add() here would require thread protection in the callback */
846 * some_widget_finalize (GObject *object)
848 * SomeWidget *self = SOME_WIDGET (object);
850 * g_source_remove (self->idle_id);
851 * G_OBJECT_CLASS (parent_class)->finalize (object);
855 * Return value: the ID (greater than 0) of the event source.
858 * Rename to: gdk_threads_add_idle
861 gdk_threads_add_idle_full (gint priority,
862 GSourceFunc function,
864 GDestroyNotify notify)
866 GdkThreadsDispatch *dispatch;
868 g_return_val_if_fail (function != NULL, 0);
870 dispatch = g_slice_new (GdkThreadsDispatch);
871 dispatch->func = function;
872 dispatch->data = data;
873 dispatch->destroy = notify;
875 return g_idle_add_full (priority,
876 gdk_threads_dispatch,
878 gdk_threads_dispatch_free);
882 * gdk_threads_add_idle: (skip)
883 * @function: function to call
884 * @data: data to pass to @function
886 * A wrapper for the common usage of gdk_threads_add_idle_full()
887 * assigning the default priority, #G_PRIORITY_DEFAULT_IDLE.
889 * See gdk_threads_add_idle_full().
891 * Return value: the ID (greater than 0) of the event source.
896 gdk_threads_add_idle (GSourceFunc function,
899 return gdk_threads_add_idle_full (G_PRIORITY_DEFAULT_IDLE,
900 function, data, NULL);
905 * gdk_threads_add_timeout_full:
906 * @priority: the priority of the timeout source. Typically this will be in the
907 * range between #G_PRIORITY_DEFAULT_IDLE and #G_PRIORITY_HIGH_IDLE.
908 * @interval: the time between calls to the function, in milliseconds
909 * (1/1000ths of a second)
910 * @function: function to call
911 * @data: data to pass to @function
912 * @notify: (allow-none): function to call when the timeout is removed, or %NULL
914 * Sets a function to be called at regular intervals holding the GDK lock,
915 * with the given priority. The function is called repeatedly until it
916 * returns %FALSE, at which point the timeout is automatically destroyed
917 * and the function will not be called again. The @notify function is
918 * called when the timeout is destroyed. The first call to the
919 * function will be at the end of the first @interval.
921 * Note that timeout functions may be delayed, due to the processing of other
922 * event sources. Thus they should not be relied on for precise timing.
923 * After each call to the timeout function, the time of the next
924 * timeout is recalculated based on the current time and the given interval
925 * (it does not try to 'catch up' time lost in delays).
927 * This variant of g_timeout_add_full() can be thought of a MT-safe version
928 * for GTK+ widgets for the following use case:
931 * static gboolean timeout_callback (gpointer data)
933 * SomeWidget *self = data;
935 * /* do stuff with self */
937 * self->timeout_id = 0;
939 * return G_SOURCE_REMOVE;
942 * static void some_widget_do_stuff_later (SomeWidget *self)
944 * self->timeout_id = g_timeout_add (timeout_callback, self)
947 * static void some_widget_finalize (GObject *object)
949 * SomeWidget *self = SOME_WIDGET (object);
951 * if (self->timeout_id)
952 * g_source_remove (self->timeout_id);
954 * G_OBJECT_CLASS (parent_class)->finalize (object);
958 * Return value: the ID (greater than 0) of the event source.
961 * Rename to: gdk_threads_add_timeout
964 gdk_threads_add_timeout_full (gint priority,
966 GSourceFunc function,
968 GDestroyNotify notify)
970 GdkThreadsDispatch *dispatch;
972 g_return_val_if_fail (function != NULL, 0);
974 dispatch = g_slice_new (GdkThreadsDispatch);
975 dispatch->func = function;
976 dispatch->data = data;
977 dispatch->destroy = notify;
979 return g_timeout_add_full (priority,
981 gdk_threads_dispatch,
983 gdk_threads_dispatch_free);
987 * gdk_threads_add_timeout: (skip)
988 * @interval: the time between calls to the function, in milliseconds
989 * (1/1000ths of a second)
990 * @function: function to call
991 * @data: data to pass to @function
993 * A wrapper for the common usage of gdk_threads_add_timeout_full()
994 * assigning the default priority, #G_PRIORITY_DEFAULT.
996 * See gdk_threads_add_timeout_full().
998 * Return value: the ID (greater than 0) of the event source.
1003 gdk_threads_add_timeout (guint interval,
1004 GSourceFunc function,
1007 return gdk_threads_add_timeout_full (G_PRIORITY_DEFAULT,
1008 interval, function, data, NULL);
1013 * gdk_threads_add_timeout_seconds_full:
1014 * @priority: the priority of the timeout source. Typically this will be in the
1015 * range between #G_PRIORITY_DEFAULT_IDLE and #G_PRIORITY_HIGH_IDLE.
1016 * @interval: the time between calls to the function, in seconds
1017 * @function: function to call
1018 * @data: data to pass to @function
1019 * @notify: (allow-none): function to call when the timeout is removed, or %NULL
1021 * A variant of gdk_threads_add_timeout_full() with second-granularity.
1022 * See g_timeout_add_seconds_full() for a discussion of why it is
1023 * a good idea to use this function if you don't need finer granularity.
1025 * Return value: the ID (greater than 0) of the event source.
1028 * Rename to: gdk_threads_add_timeout_seconds
1031 gdk_threads_add_timeout_seconds_full (gint priority,
1033 GSourceFunc function,
1035 GDestroyNotify notify)
1037 GdkThreadsDispatch *dispatch;
1039 g_return_val_if_fail (function != NULL, 0);
1041 dispatch = g_slice_new (GdkThreadsDispatch);
1042 dispatch->func = function;
1043 dispatch->data = data;
1044 dispatch->destroy = notify;
1046 return g_timeout_add_seconds_full (priority,
1048 gdk_threads_dispatch,
1050 gdk_threads_dispatch_free);
1054 * gdk_threads_add_timeout_seconds: (skip)
1055 * @interval: the time between calls to the function, in seconds
1056 * @function: function to call
1057 * @data: data to pass to @function
1059 * A wrapper for the common usage of gdk_threads_add_timeout_seconds_full()
1060 * assigning the default priority, #G_PRIORITY_DEFAULT.
1062 * For details, see gdk_threads_add_timeout_full().
1064 * Return value: the ID (greater than 0) of the event source.
1069 gdk_threads_add_timeout_seconds (guint interval,
1070 GSourceFunc function,
1073 return gdk_threads_add_timeout_seconds_full (G_PRIORITY_DEFAULT,
1074 interval, function, data, NULL);
1078 * gdk_get_program_class:
1080 * Gets the program class. Unless the program class has explicitly
1081 * been set with gdk_set_program_class() or with the <option>--class</option>
1082 * commandline option, the default value is the program name (determined
1083 * with g_get_prgname()) with the first character converted to uppercase.
1085 * Returns: the program class.
1088 gdk_get_program_class (void)
1090 return gdk_progclass;
1094 * gdk_set_program_class:
1095 * @program_class: a string.
1097 * Sets the program class. The X11 backend uses the program class to set
1098 * the class name part of the <literal>WM_CLASS</literal> property on
1099 * toplevel windows; see the ICCCM.
1102 gdk_set_program_class (const char *program_class)
1104 g_free (gdk_progclass);
1106 gdk_progclass = g_strdup (program_class);
1110 * gdk_disable_multidevice:
1112 * Disables multidevice support in GDK. This call must happen prior
1113 * to gdk_display_open(), gtk_init(), gtk_init_with_args() or
1114 * gtk_init_check() in order to take effect.
1116 * Most common GTK+ applications won't ever need to call this. Only
1117 * applications that do mixed GDK/Xlib calls could want to disable
1118 * multidevice support if such Xlib code deals with input devices in
1119 * any way and doesn't observe the presence of XInput 2.
1124 gdk_disable_multidevice (void)
1126 if (gdk_initialized)
1129 _gdk_disable_multidevice = TRUE;