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 "gdkdisplay.h"
  30 #include "gdkdisplaymanager.h"
  31
  32 #include "gdkinternals.h"
  33 #include "gdkmarshalers.h"
  34
  35 #include "gdkintl.h"
  36
  37 struct _GdkDisplayManager
  38 {
  39   GObject parent_instance;
  40 };
  41
  42 enum {
  43   PROP_0,
  44
  45   PROP_DEFAULT_DISPLAY
  46 };
  47
  48 enum {
  49   DISPLAY_OPENED,
  50   LAST_SIGNAL
  51 };
  52
  53 static void gdk_display_manager_class_init   (GdkDisplayManagerClass *klass);
  54 static void gdk_display_manager_set_property (GObject                *object,
  55                                               guint                   prop_id,
  56                                               const GValue           *value,
  57                                               GParamSpec             *pspec);
  58 static void gdk_display_manager_get_property (GObject                *object,
  59                                               guint                   prop_id,
  60                                               GValue                 *value,
  61                                               GParamSpec             *pspec);
  62
  63 static guint signals[LAST_SIGNAL] = { 0 };
  64
  65 GdkDisplay *default_display = NULL;
  66
  67 GType
  68 gdk_display_manager_get_type (void)
  69 {
  70   static GType object_type = 0;
  71
  72   if (!object_type)
  73     {
  74       static const GTypeInfo object_info =
  75       {
  76         sizeof (GdkDisplayManagerClass),
  77         (GBaseInitFunc) NULL,
  78         (GBaseFinalizeFunc) NULL,
  79         (GClassInitFunc) gdk_display_manager_class_init,
  80         NULL,           /* class_finalize */
  81         NULL,           /* class_data */
  82         sizeof (GdkDisplayManager),
  83         0,              /* n_preallocs */
  84         (GInstanceInitFunc) NULL,
  85       };
  86
  87       object_type = g_type_register_static (G_TYPE_OBJECT,
  88                                             "GdkDisplayManager",
  89                                             &object_info, 0);
  90     }
  91
  92   return object_type;
  93 }
  94
  95 static void
  96 gdk_display_manager_class_init (GdkDisplayManagerClass *klass)
  97 {
  98   GObjectClass *object_class = G_OBJECT_CLASS (klass);
  99
 100   object_class->set_property = gdk_display_manager_set_property;
 101   object_class->get_property = gdk_display_manager_get_property;
 102
 103   signals[DISPLAY_OPENED] =
 104     g_signal_new ("display_opened",
 105                   G_OBJECT_CLASS_TYPE (object_class),
 106                   G_SIGNAL_RUN_LAST,
 107                   G_STRUCT_OFFSET (GdkDisplayManagerClass, display_opened),
 108                   NULL, NULL,
 109                   gdk_marshal_VOID__OBJECT,
 110                   G_TYPE_NONE,
 111                   1,
 112                   GDK_TYPE_DISPLAY);
 113
 114   g_object_class_install_property (object_class,
 115                                    PROP_DEFAULT_DISPLAY,
 116                                    g_param_spec_object ("default-display",
 117                                                         _("Default Display"),
 118                                                         _("The default display for GDK"),
 119                                                         GDK_TYPE_DISPLAY,
 120                                                         G_PARAM_READWRITE));
 121 }
 122
 123 static void
 124 gdk_display_manager_set_property (GObject      *object,
 125                                   guint         prop_id,
 126                                   const GValue *value,
 127                                   GParamSpec   *pspec)
 128 {
 129   switch (prop_id)
 130     {
 131     case PROP_DEFAULT_DISPLAY:
 132       default_display = g_value_get_object (value);
 133       break;
 134     default:
 135       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 136       break;
 137     }
 138 }
 139
 140 static void
 141 gdk_display_manager_get_property (GObject      *object,
 142                                   guint         prop_id,
 143                                   GValue       *value,
 144                                   GParamSpec   *pspec)
 145 {
 146   switch (prop_id)
 147     {
 148     case PROP_DEFAULT_DISPLAY:
 149       g_value_set_object (value, default_display);
 150       break;
 151     default:
 152       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 153       break;
 154     }
 155 }
 156
 157 /**
 158  * gdk_display_manager_get:
 159  * @returns: the singleton #GdkDisplayManager object.
 160  *
 161  * Returns the global #GdkDisplayManager singleton; gdk_parse_pargs(),
 162  * gdk_init(), or gdk_init_check() must have been called first.
 163  **/
 164 GdkDisplayManager*
 165 gdk_display_manager_get (void)
 166 {
 167   static GdkDisplayManager *display_manager = NULL;
 168
 169   if (!display_manager)
 170     display_manager = g_object_new (GDK_TYPE_DISPLAY_MANAGER, NULL);
 171
 172   return display_manager;
 173 }
 174
 175 /**
 176  * gdk_display_manager_get_default_display:
 177  * @display_manager: a #GdkDisplayManager
 178  *
 179  * Gets the default #GdkDisplay.
 180  *
 181  * Returns: a #GdkDisplay, or %NULL if there is no default
 182  *   display.
 183  */
 184 GdkDisplay *
 185 gdk_display_manager_get_default_display (GdkDisplayManager *display_manager)
 186 {
 187   return default_display;
 188 }
 189
 190 /**
 191  * gdk_display_get_default:
 192  *
 193  * Gets the default #GdkDisplay. This is a convenience
 194  * function for:
 195  * <programlisting>
 196  *   gdk_display_manager_get_default_display (gdk_display_manager_get ())
 197  * </programlisting>
 198  *
 199  * Returns: a #GdkDisplay, or %NULL if there is no default
 200  *   display.
 201  */
 202 GdkDisplay *
 203 gdk_display_get_default (void)
 204 {
 205   return default_display;
 206 }
 207
 208 /**
 209  * gdk_screen_get_default:
 210  *
 211  * Gets the default screen for the default display. (See
 212  * gdk_display_get_default ()).
 213  *
 214  * Returns: a #GdkScreen, or %NULL if there is no default display.
 215  */
 216 GdkScreen *
 217 gdk_screen_get_default (void)
 218 {
 219   if (default_display)
 220     return gdk_display_get_default_screen (default_display);
 221   else
 222     return NULL;
 223 }
 224
 225 /**
 226  * gdk_display_manager_set_default_display:
 227  * @display_manager: a #GdkDisplayManager
 228  * @display: a #GdkDisplay
 229  *
 230  * Sets @display as the default display.
 231  **/
 232 void
 233 gdk_display_manager_set_default_display (GdkDisplayManager *display_manager,
 234                                          GdkDisplay        *display)
 235 {
 236   default_display = display;
 237
 238   _gdk_windowing_set_default_display (display);
 239
 240   g_object_notify (G_OBJECT (display_manager), "default_display");
 241 }
 242
 243 /**
 244  * gdk_display_manager_list_displays:
 245  * @display_manager: a #GdkDisplayManager
 246  *
 247  * List all currently open displays.
 248  *
 249  * Return value: a newly allocated #GSList of #GdkDisplay objects.
 250  *  Free this list with g_slist_free() when you are done with it.
 251  **/
 252 GSList *
 253 gdk_display_manager_list_displays (GdkDisplayManager *display_manager)
 254 {
 255   return g_slist_copy (_gdk_displays);
 256 }
 257