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 #include "gdkalias.h"
  39
  40 struct _GdkDisplayManager
  41 {
  42   GObject parent_instance;
  43 };
  44
  45 enum {
  46   PROP_0,
  47
  48   PROP_DEFAULT_DISPLAY
  49 };
  50
  51 enum {
  52   DISPLAY_OPENED,
  53   LAST_SIGNAL
  54 };
  55
  56 static void gdk_display_manager_class_init   (GdkDisplayManagerClass *klass);
  57 static void gdk_display_manager_set_property (GObject                *object,
  58                                               guint                   prop_id,
  59                                               const GValue           *value,
  60                                               GParamSpec             *pspec);
  61 static void gdk_display_manager_get_property (GObject                *object,
  62                                               guint                   prop_id,
  63                                               GValue                 *value,
  64                                               GParamSpec             *pspec);
  65
  66 static guint signals[LAST_SIGNAL] = { 0 };
  67
  68 static GdkDisplay *default_display = NULL;
  69
  70 GType
  71 gdk_display_manager_get_type (void)
  72 {
  73   static GType object_type = 0;
  74
  75   if (!object_type)
  76     {
  77       static const GTypeInfo object_info =
  78       {
  79         sizeof (GdkDisplayManagerClass),
  80         (GBaseInitFunc) NULL,
  81         (GBaseFinalizeFunc) NULL,
  82         (GClassInitFunc) gdk_display_manager_class_init,
  83         NULL,           /* class_finalize */
  84         NULL,           /* class_data */
  85         sizeof (GdkDisplayManager),
  86         0,              /* n_preallocs */
  87         (GInstanceInitFunc) NULL,
  88       };
  89
  90       object_type = g_type_register_static (G_TYPE_OBJECT,
  91                                             g_intern_static_string ("GdkDisplayManager"),
  92                                             &object_info, 0);
  93     }
  94
  95   return object_type;
  96 }
  97
  98 static void
  99 gdk_display_manager_class_init (GdkDisplayManagerClass *klass)
 100 {
 101   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 102
 103   object_class->set_property = gdk_display_manager_set_property;
 104   object_class->get_property = gdk_display_manager_get_property;
 105
 106   /**
 107    * GdkDisplayManager::display-opened:
 108    * @display_manager: the object on which the signal is emitted
 109    * @display: the opened display
 110    *
 111    * The ::display_opened signal is emitted when a display is opened.
 112    *
 113    * Since: 2.2
 114    */
 115   signals[DISPLAY_OPENED] =
 116     g_signal_new (g_intern_static_string ("display_opened"),
 117                   G_OBJECT_CLASS_TYPE (object_class),
 118                   G_SIGNAL_RUN_LAST,
 119                   G_STRUCT_OFFSET (GdkDisplayManagerClass, display_opened),
 120                   NULL, NULL,
 121                   gdk_marshal_VOID__OBJECT,
 122                   G_TYPE_NONE,
 123                   1,
 124                   GDK_TYPE_DISPLAY);
 125
 126   g_object_class_install_property (object_class,
 127                                    PROP_DEFAULT_DISPLAY,
 128                                    g_param_spec_object ("default-display",
 129                                                         P_("Default Display"),
 130                                                         P_("The default display for GDK"),
 131                                                         GDK_TYPE_DISPLAY,
 132                                                         G_PARAM_READWRITE|G_PARAM_STATIC_NAME|
 133                                                         G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
 134 }
 135
 136 static void
 137 gdk_display_manager_set_property (GObject      *object,
 138                                   guint         prop_id,
 139                                   const GValue *value,
 140                                   GParamSpec   *pspec)
 141 {
 142   switch (prop_id)
 143     {
 144     case PROP_DEFAULT_DISPLAY:
 145       default_display = g_value_get_object (value);
 146       break;
 147     default:
 148       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 149       break;
 150     }
 151 }
 152
 153 static void
 154 gdk_display_manager_get_property (GObject      *object,
 155                                   guint         prop_id,
 156                                   GValue       *value,
 157                                   GParamSpec   *pspec)
 158 {
 159   switch (prop_id)
 160     {
 161     case PROP_DEFAULT_DISPLAY:
 162       g_value_set_object (value, default_display);
 163       break;
 164     default:
 165       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 166       break;
 167     }
 168 }
 169
 170 /**
 171  * gdk_display_manager_get:
 172  * @returns: the singleton #GdkDisplayManager object.
 173  *
 174  * Returns the global #GdkDisplayManager singleton; gdk_parse_pargs(),
 175  * gdk_init(), or gdk_init_check() must have been called first.
 176  *
 177  * Since: 2.2
 178  **/
 179 GdkDisplayManager*
 180 gdk_display_manager_get (void)
 181 {
 182   static GdkDisplayManager *display_manager = NULL;
 183
 184   if (!display_manager)
 185     display_manager = g_object_new (GDK_TYPE_DISPLAY_MANAGER, NULL);
 186
 187   return display_manager;
 188 }
 189
 190 /**
 191  * gdk_display_manager_get_default_display:
 192  * @display_manager: a #GdkDisplayManager
 193  *
 194  * Gets the default #GdkDisplay.
 195  *
 196  * Returns: a #GdkDisplay, or %NULL if there is no default
 197  *   display.
 198  *
 199  * Since: 2.2
 200  */
 201 GdkDisplay *
 202 gdk_display_manager_get_default_display (GdkDisplayManager *display_manager)
 203 {
 204   return default_display;
 205 }
 206
 207 /**
 208  * gdk_display_get_default:
 209  *
 210  * Gets the default #GdkDisplay. This is a convenience
 211  * function for:
 212  * <programlisting>
 213  *   gdk_display_manager_get_default_display (gdk_display_manager_get ())
 214  * </programlisting>
 215  *
 216  * Returns: a #GdkDisplay, or %NULL if there is no default
 217  *   display.
 218  *
 219  * Since: 2.2
 220  */
 221 GdkDisplay *
 222 gdk_display_get_default (void)
 223 {
 224   return default_display;
 225 }
 226
 227 /**
 228  * gdk_screen_get_default:
 229  *
 230  * Gets the default screen for the default display. (See
 231  * gdk_display_get_default ()).
 232  *
 233  * Returns: a #GdkScreen, or %NULL if there is no default display.
 234  *
 235  * Since: 2.2
 236  */
 237 GdkScreen *
 238 gdk_screen_get_default (void)
 239 {
 240   if (default_display)
 241     return gdk_display_get_default_screen (default_display);
 242   else
 243     return NULL;
 244 }
 245
 246 /**
 247  * gdk_display_manager_set_default_display:
 248  * @display_manager: a #GdkDisplayManager
 249  * @display: a #GdkDisplay
 250  *
 251  * Sets @display as the default display.
 252  *
 253  * Since: 2.2
 254  **/
 255 void
 256 gdk_display_manager_set_default_display (GdkDisplayManager *display_manager,
 257                                          GdkDisplay        *display)
 258 {
 259   default_display = display;
 260
 261   _gdk_windowing_set_default_display (display);
 262
 263   g_object_notify (G_OBJECT (display_manager), "default-display");
 264 }
 265
 266 /**
 267  * gdk_display_manager_list_displays:
 268  * @display_manager: a #GdkDisplayManager
 269  *
 270  * List all currently open displays.
 271  *
 272  * Return value: a newly allocated #GSList of #GdkDisplay objects.
 273  *  Free this list with g_slist_free() when you are done with it.
 274  *
 275  * Since: 2.2
 276  **/
 277 GSList *
 278 gdk_display_manager_list_displays (GdkDisplayManager *display_manager)
 279 {
 280   return g_slist_copy (_gdk_displays);
 281 }
 282
 283 #define __GDK_DISPLAY_MANAGER_C__
 284 #include "gdkaliasdef.c"