Pileus Git - ~andy/gtk/blob - gdk/gdkdisplaymanager.c

   1 /* GDK - The GIMP Drawing Kit
   2  * Copyright (C) 2000 Red Hat, Inc.
   3  *
   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.
   8  *
   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.
  13  *
  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.
  18  */
  19
  20 /*
  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/.
  25  */
  26
  27 #include "config.h"
  28
  29 #include "gdkscreen.h"
  30 #include "gdkdisplay.h"
  31 #include "gdkdisplaymanager.h"
  32
  33 #include "gdkinternals.h"
  34 #include "gdkmarshalers.h"
  35
  36 #include "gdkintl.h"
  37
  38
  39 struct _GdkDisplayManager
  40 {
  41   GObject parent_instance;
  42 };
  43
  44 enum {
  45   PROP_0,
  46
  47   PROP_DEFAULT_DISPLAY
  48 };
  49
  50 enum {
  51   DISPLAY_OPENED,
  52   LAST_SIGNAL
  53 };
  54
  55 static void gdk_display_manager_class_init   (GdkDisplayManagerClass *klass);
  56 static void gdk_display_manager_set_property (GObject                *object,
  57                                               guint                   prop_id,
  58                                               const GValue           *value,
  59                                               GParamSpec             *pspec);
  60 static void gdk_display_manager_get_property (GObject                *object,
  61                                               guint                   prop_id,
  62                                               GValue                 *value,
  63                                               GParamSpec             *pspec);
  64
  65 static guint signals[LAST_SIGNAL] = { 0 };
  66
  67 static GdkDisplay *default_display = NULL;
  68
  69 G_DEFINE_TYPE (GdkDisplayManager, gdk_display_manager, G_TYPE_OBJECT)
  70
  71 static void
  72 gdk_display_manager_class_init (GdkDisplayManagerClass *klass)
  73 {
  74   GObjectClass *object_class = G_OBJECT_CLASS (klass);
  75
  76   object_class->set_property = gdk_display_manager_set_property;
  77   object_class->get_property = gdk_display_manager_get_property;
  78
  79   /**
  80    * GdkDisplayManager::display-opened:
  81    * @display_manager: the object on which the signal is emitted
  82    * @display: the opened display
  83    *
  84    * The ::display_opened signal is emitted when a display is opened.
  85    *
  86    * Since: 2.2
  87    */
  88   signals[DISPLAY_OPENED] =
  89     g_signal_new (g_intern_static_string ("display-opened"),
  90                   G_OBJECT_CLASS_TYPE (object_class),
  91                   G_SIGNAL_RUN_LAST,
  92                   G_STRUCT_OFFSET (GdkDisplayManagerClass, display_opened),
  93                   NULL, NULL,
  94                   _gdk_marshal_VOID__OBJECT,
  95                   G_TYPE_NONE,
  96                   1,
  97                   GDK_TYPE_DISPLAY);
  98
  99   g_object_class_install_property (object_class,
 100                                    PROP_DEFAULT_DISPLAY,
 101                                    g_param_spec_object ("default-display",
 102                                                         P_("Default Display"),
 103                                                         P_("The default display for GDK"),
 104                                                         GDK_TYPE_DISPLAY,
 105                                                         G_PARAM_READWRITE|G_PARAM_STATIC_NAME|
 106                                                         G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
 107 }
 108
 109 static void
 110 gdk_display_manager_init (GdkDisplayManager *manager)
 111 {
 112 }
 113
 114 static void
 115 gdk_display_manager_set_property (GObject      *object,
 116                                   guint         prop_id,
 117                                   const GValue *value,
 118                                   GParamSpec   *pspec)
 119 {
 120   switch (prop_id)
 121     {
 122     case PROP_DEFAULT_DISPLAY:
 123       gdk_display_manager_set_default_display (GDK_DISPLAY_MANAGER (object),
 124                                                g_value_get_object (value));
 125       break;
 126     default:
 127       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 128       break;
 129     }
 130 }
 131
 132 static void
 133 gdk_display_manager_get_property (GObject      *object,
 134                                   guint         prop_id,
 135                                   GValue       *value,
 136                                   GParamSpec   *pspec)
 137 {
 138   switch (prop_id)
 139     {
 140     case PROP_DEFAULT_DISPLAY:
 141       g_value_set_object (value, default_display);
 142       break;
 143     default:
 144       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 145       break;
 146     }
 147 }
 148
 149 /**
 150  * gdk_display_manager_get:
 151  *
 152  * Gets the singleton #GdkDisplayManager object.
 153  *
 154  * Returns: (transfer none): The global #GdkDisplayManager singleton; gdk_parse_pargs(),
 155  * gdk_init(), or gdk_init_check() must have been called first.
 156  *
 157  * Since: 2.2
 158  **/
 159 GdkDisplayManager*
 160 gdk_display_manager_get (void)
 161 {
 162   static GdkDisplayManager *display_manager = NULL;
 163
 164   if (!display_manager)
 165     display_manager = g_object_new (GDK_TYPE_DISPLAY_MANAGER, NULL);
 166
 167   return display_manager;
 168 }
 169
 170 /**
 171  * gdk_display_manager_get_default_display:
 172  * @display_manager: a #GdkDisplayManager
 173  *
 174  * Gets the default #GdkDisplay.
 175  *
 176  * Returns: (transfer none): a #GdkDisplay, or %NULL if there is no default
 177  *   display.
 178  *
 179  * Since: 2.2
 180  */
 181 GdkDisplay *
 182 gdk_display_manager_get_default_display (GdkDisplayManager *display_manager)
 183 {
 184   return default_display;
 185 }
 186
 187 /**
 188  * gdk_display_get_default:
 189  *
 190  * Gets the default #GdkDisplay. This is a convenience
 191  * function for
 192  * <literal>gdk_display_manager_get_default_display (gdk_display_manager_get ())</literal>.
 193  *
 194  * Returns: (transfer none): a #GdkDisplay, or %NULL if there is no default
 195  *   display.
 196  *
 197  * Since: 2.2
 198  */
 199 GdkDisplay *
 200 gdk_display_get_default (void)
 201 {
 202   return default_display;
 203 }
 204
 205 /**
 206  * gdk_screen_get_default:
 207  *
 208  * Gets the default screen for the default display. (See
 209  * gdk_display_get_default ()).
 210  *
 211  * Returns: (transfer none): a #GdkScreen, or %NULL if there is no default display.
 212  *
 213  * Since: 2.2
 214  */
 215 GdkScreen *
 216 gdk_screen_get_default (void)
 217 {
 218   if (default_display)
 219     return gdk_display_get_default_screen (default_display);
 220   else
 221     return NULL;
 222 }
 223
 224 /**
 225  * gdk_display_manager_set_default_display:
 226  * @display_manager: a #GdkDisplayManager
 227  * @display: a #GdkDisplay
 228  *
 229  * Sets @display as the default display.
 230  *
 231  * Since: 2.2
 232  **/
 233 void
 234 gdk_display_manager_set_default_display (GdkDisplayManager *display_manager,
 235                                          GdkDisplay        *display)
 236 {
 237   default_display = display;
 238
 239   _gdk_windowing_set_default_display (display);
 240
 241   g_object_notify (G_OBJECT (display_manager), "default-display");
 242 }
 243
 244 /**
 245  * gdk_display_manager_list_displays:
 246  * @display_manager: a #GdkDisplayManager
 247  *
 248  * List all currently open displays.
 249  *
 250  * Return value: (transfer container) (element-type GdkDisplay): a newly allocated
 251  * #GSList of #GdkDisplay objects. Free this list with g_slist_free() when you
 252  * are done with it.
 253  *
 254  * Since: 2.2
 255  **/
 256 GSList *
 257 gdk_display_manager_list_displays (GdkDisplayManager *display_manager)
 258 {
 259   return g_slist_copy (_gdk_displays);
 260 }