1 /* GDK - The GIMP Drawing Kit
2 * Copyright (C) 2000 Red Hat, Inc.
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, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GTK+ Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
29 #include "gdkconfig.h"
30 #include "gdkdisplaymanagerprivate.h"
31 #include "gdkinternals.h"
32 #include "gdkmarshalers.h"
35 #ifdef GDK_WINDOWING_X11
39 #ifdef GDK_WINDOWING_QUARTZ
40 /* We immediately include gdkquartzdisplaymanager.h here instead of
41 * gdkquartz.h so that we do not have to enable -xobjective-c for the
42 * "generic" GDK source code.
44 #include "quartz/gdkquartzdisplaymanager.h"
49 * SECTION:gdkdisplaymanager
50 * @Short_description: Maintains a list of all open GdkDisplays
51 * @Title: GdkDisplayManager
53 * The purpose of the #GdkDisplayManager singleton object is to offer
54 * notification when displays appear or disappear or the default display
69 static void gdk_display_manager_class_init (GdkDisplayManagerClass *klass);
70 static void gdk_display_manager_set_property (GObject *object,
74 static void gdk_display_manager_get_property (GObject *object,
79 static guint signals[LAST_SIGNAL] = { 0 };
81 G_DEFINE_TYPE (GdkDisplayManager, gdk_display_manager, G_TYPE_OBJECT)
84 gdk_display_manager_class_init (GdkDisplayManagerClass *klass)
86 GObjectClass *object_class = G_OBJECT_CLASS (klass);
88 object_class->set_property = gdk_display_manager_set_property;
89 object_class->get_property = gdk_display_manager_get_property;
92 * GdkDisplayManager::display-opened:
93 * @manager: the object on which the signal is emitted
94 * @display: the opened display
96 * The ::display-opened signal is emitted when a display is opened.
100 signals[DISPLAY_OPENED] =
101 g_signal_new (g_intern_static_string ("display-opened"),
102 G_OBJECT_CLASS_TYPE (object_class),
104 G_STRUCT_OFFSET (GdkDisplayManagerClass, display_opened),
106 _gdk_marshal_VOID__OBJECT,
111 g_object_class_install_property (object_class,
112 PROP_DEFAULT_DISPLAY,
113 g_param_spec_object ("default-display",
114 P_("Default Display"),
115 P_("The default display for GDK"),
117 G_PARAM_READWRITE|G_PARAM_STATIC_NAME|
118 G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
122 gdk_display_manager_init (GdkDisplayManager *manager)
127 gdk_display_manager_set_property (GObject *object,
134 case PROP_DEFAULT_DISPLAY:
135 gdk_display_manager_set_default_display (GDK_DISPLAY_MANAGER (object),
136 g_value_get_object (value));
139 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
145 gdk_display_manager_get_property (GObject *object,
152 case PROP_DEFAULT_DISPLAY:
153 g_value_set_object (value,
154 gdk_display_manager_get_default_display (GDK_DISPLAY_MANAGER (object)));
157 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
163 * gdk_display_manager_get:
165 * Gets the singleton #GdkDisplayManager object.
167 * When called for the first time, this function consults the
168 * <envar>GDK_BACKEND</envar> to find out which of the supported
169 * GDK backends to use (in case GDK has been compiled with multiple
172 * Returns: (transfer none): The global #GdkDisplayManager singleton;
173 * gdk_parse_pargs(), gdk_init(), or gdk_init_check() must have
179 gdk_display_manager_get (void)
181 static GdkDisplayManager *manager = NULL;
185 const gchar *backend;
187 backend = g_getenv ("GDK_BACKEND");
188 #ifdef GDK_WINDOWING_X11
189 if (backend == NULL || strcmp (backend, "x11") == 0)
190 manager = g_object_new (gdk_x11_display_manager_get_type (), NULL);
193 #ifdef GDK_WINDOWING_QUARTZ
194 if (backend == NULL || strcmp (backend, "quartz") == 0)
195 manager = g_object_new (gdk_quartz_display_manager_get_type (), NULL);
199 g_error ("Unsupported GDK backend: %s", backend);
201 g_error ("No GDK backend found");
208 * gdk_display_manager_get_default_display:
209 * @manager: a #GdkDisplayManager
211 * Gets the default #GdkDisplay.
213 * Returns: (transfer none): a #GdkDisplay, or %NULL
214 * if there is no default display.
219 gdk_display_manager_get_default_display (GdkDisplayManager *manager)
221 return GDK_DISPLAY_MANAGER_GET_CLASS (manager)->get_default_display (manager);
225 * gdk_display_get_default:
227 * Gets the default #GdkDisplay. This is a convenience
229 * <literal>gdk_display_manager_get_default_display (gdk_display_manager_get ())</literal>.
231 * Returns: (transfer none): a #GdkDisplay, or %NULL if there is no default
237 gdk_display_get_default (void)
239 return gdk_display_manager_get_default_display (gdk_display_manager_get ());
243 * gdk_screen_get_default:
245 * Gets the default screen for the default display. (See
246 * gdk_display_get_default ()).
248 * Returns: (transfer none): a #GdkScreen, or %NULL if there is no default display.
253 gdk_screen_get_default (void)
255 GdkDisplay *default_display;
257 default_display = gdk_display_get_default ();
260 return gdk_display_get_default_screen (default_display);
266 * gdk_display_manager_set_default_display:
267 * @manager: a #GdkDisplayManager
268 * @display: a #GdkDisplay
270 * Sets @display as the default display.
275 gdk_display_manager_set_default_display (GdkDisplayManager *manager,
278 GDK_DISPLAY_MANAGER_GET_CLASS (manager)->set_default_display (manager, display);
280 g_object_notify (G_OBJECT (manager), "default-display");
284 * gdk_display_manager_list_displays:
285 * @manager: a #GdkDisplayManager
287 * List all currently open displays.
289 * Return value: (transfer container) (element-type GdkDisplay): a newly
290 * allocated #GSList of #GdkDisplay objects. Free with g_slist_free()
291 * when you are done with it.
296 gdk_display_manager_list_displays (GdkDisplayManager *manager)
298 return GDK_DISPLAY_MANAGER_GET_CLASS (manager)->list_displays (manager);
302 gdk_display_manager_open_display (GdkDisplayManager *manager,
305 return GDK_DISPLAY_MANAGER_GET_CLASS (manager)->open_display (manager, name);
310 * @atom_name: a string.
311 * @only_if_exists: if %TRUE, GDK is allowed to not create a new atom, but
312 * just return %GDK_NONE if the requested atom doesn't already
313 * exists. Currently, the flag is ignored, since checking the
314 * existance of an atom is as expensive as creating it.
316 * Finds or creates an atom corresponding to a given string.
318 * Returns: the atom corresponding to @atom_name.
321 gdk_atom_intern (const gchar *atom_name,
322 gboolean only_if_exists)
324 GdkDisplayManager *manager = gdk_display_manager_get ();
326 return GDK_DISPLAY_MANAGER_GET_CLASS (manager)->atom_intern (manager, atom_name, TRUE);
330 * gdk_atom_intern_static_string:
331 * @atom_name: a static string
333 * Finds or creates an atom corresponding to a given string.
335 * Note that this function is identical to gdk_atom_intern() except
336 * that if a new #GdkAtom is created the string itself is used rather
337 * than a copy. This saves memory, but can only be used if the string
338 * will <emphasis>always</emphasis> exist. It can be used with statically
339 * allocated strings in the main program, but not with statically
340 * allocated memory in dynamically loaded modules, if you expect to
341 * ever unload the module again (e.g. do not use this function in
342 * GTK+ theme engines).
344 * Returns: the atom corresponding to @atom_name
349 gdk_atom_intern_static_string (const gchar *atom_name)
351 GdkDisplayManager *manager = gdk_display_manager_get ();
353 return GDK_DISPLAY_MANAGER_GET_CLASS (manager)->atom_intern (manager, atom_name, FALSE);
360 * Determines the string corresponding to an atom.
362 * Returns: a newly-allocated string containing the string
363 * corresponding to @atom. When you are done with the
364 * return value, you should free it using g_free().
367 gdk_atom_name (GdkAtom atom)
369 GdkDisplayManager *manager = gdk_display_manager_get ();
371 return GDK_DISPLAY_MANAGER_GET_CLASS (manager)->get_atom_name (manager, atom);