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Viewing changes to gnome-flashback/libdesktop-background/flashback-desktop-background.c

  • Committer: Package Import Robot
  • Author(s): Dmitry Shachnev
  • Date: 2014-09-19 17:09:43 UTC
  • Revision ID: package-import@ubuntu.com-20140919170943-oboafsedi6z69951
Tags: upstream-3.10.0
Import upstream version 3.10.0

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gnome-flashback/libdesktop-background/flashback-desktop-background.c
 
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/* 
 
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 * Copyright (C) 2014 Alberts Muktupāvels
 
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 *
 
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 * This program is free software: you can redistribute it and/or modify
 
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 * it under the terms of the GNU General Public License as published by
 
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 * the Free Software Foundation, either version 3 of the License, or
 
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 * (at your option) any later version.
 
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 *
 
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 * This program is distributed in the hope that it will be useful,
 
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 
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 * GNU General Public License for more details.
 
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 *
 
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 * You should have received a copy of the GNU General Public License
 
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 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 
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 */
 
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#include <gtk/gtk.h>
 
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#include <libgnome-desktop/gnome-bg.h>
 
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#include "flashback-desktop-background.h"
 
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/*#define FLASHBACK_BACKGROUND_SCHEMA "org.gnome.gnome-flashback.background"
 
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#define KEY_FADE                    "fade"*/
 
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struct _FlashbackDesktopBackgroundPrivate {
 
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        GnomeBG   *gnome_bg;
 
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        GSettings *gnome_settings;
 
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        gulong     screen_size_handler;
 
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        gulong     screen_monitors_handler;
 
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};
 
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G_DEFINE_TYPE (FlashbackDesktopBackground, flashback_desktop_background, G_TYPE_OBJECT);
 
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static void
 
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flashback_desktop_background_draw (FlashbackDesktopBackground *background)
 
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{
 
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        GdkScreen *screen = gdk_screen_get_default ();
 
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        cairo_surface_t *surface = gnome_bg_create_surface (background->priv->gnome_bg,
 
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                                                            gdk_screen_get_root_window (screen),
 
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                                                            gdk_screen_get_width (screen),
 
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                                                            gdk_screen_get_height (screen),
 
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                                                            TRUE);
 
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        gnome_bg_set_surface_as_root (screen, surface);
 
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        cairo_surface_destroy (surface);
 
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}
 
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static void
 
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flashback_desktop_background_changed (GnomeBG  *bg,
 
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                                      gpointer  user_data)
 
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{
 
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        FlashbackDesktopBackground *background = FLASHBACK_DESKTOP_BACKGROUND (user_data);
 
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        flashback_desktop_background_draw (background);
 
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}
 
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static void
 
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flashback_desktop_background_transitioned (GnomeBG  *bg,
 
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                                           gpointer  user_data)
 
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{
 
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        FlashbackDesktopBackground *background = FLASHBACK_DESKTOP_BACKGROUND (user_data);
 
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        flashback_desktop_background_draw (background);
 
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}
 
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static void
 
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flashback_desktop_background_screen_size_changed (GdkScreen                  *screen,
 
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                                                  FlashbackDesktopBackground *background)
 
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{
 
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        flashback_desktop_background_draw (background);
 
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}
 
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static gboolean
 
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flashback_desktop_background_settings_change_event (GSettings *settings,
 
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                                                    gpointer   keys,
 
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                                                    gint       n_keys,
 
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                                                    gpointer   user_data)
 
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{
 
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        FlashbackDesktopBackground *background = FLASHBACK_DESKTOP_BACKGROUND (user_data);
 
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        gnome_bg_load_from_preferences (background->priv->gnome_bg, background->priv->gnome_settings);
 
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        return TRUE;
 
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}
 
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static void
 
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flashback_desktop_background_finalize (GObject *object)
 
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{
 
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        FlashbackDesktopBackground *background = FLASHBACK_DESKTOP_BACKGROUND (object);
 
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        if (background->priv->screen_size_handler > 0) {
 
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                g_signal_handler_disconnect (gdk_screen_get_default (),
 
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                                             background->priv->screen_size_handler);
 
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                background->priv->screen_size_handler = 0;
 
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        }
 
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        if (background->priv->screen_monitors_handler > 0) {
 
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                g_signal_handler_disconnect (gdk_screen_get_default (),
 
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                                             background->priv->screen_monitors_handler);
 
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                background->priv->screen_monitors_handler = 0;
 
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        }
 
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        g_signal_handlers_disconnect_by_func (background->priv->gnome_settings,
 
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                                              flashback_desktop_background_settings_change_event,
 
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                                              background);
 
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        if (background->priv->gnome_bg) {
 
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                g_object_unref (background->priv->gnome_bg);
 
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                background->priv->gnome_bg = NULL;
 
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        }
 
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        if (background->priv->gnome_settings) {
 
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                g_object_unref (background->priv->gnome_settings);
 
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                background->priv->gnome_settings = NULL;
 
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        }
 
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        G_OBJECT_CLASS (flashback_desktop_background_parent_class)->finalize (object);
 
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}
 
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static void
 
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flashback_desktop_background_init (FlashbackDesktopBackground *background)
 
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{
 
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        background->priv = G_TYPE_INSTANCE_GET_PRIVATE (background, FLASHBACK_TYPE_DESKTOP_BACKGROUND, FlashbackDesktopBackgroundPrivate);
 
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        background->priv->gnome_bg = gnome_bg_new ();
 
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        background->priv->gnome_settings = g_settings_new ("org.gnome.desktop.background");
 
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        g_signal_connect (background->priv->gnome_bg, "changed",
 
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                          G_CALLBACK (flashback_desktop_background_changed), background);
 
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        g_signal_connect (background->priv->gnome_bg, "transitioned",
 
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                          G_CALLBACK (flashback_desktop_background_transitioned), background);
 
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        background->priv->screen_size_handler = g_signal_connect (gdk_screen_get_default (), "size-changed",
 
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                                                                  G_CALLBACK (flashback_desktop_background_screen_size_changed), background);
 
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        background->priv->screen_monitors_handler = g_signal_connect (gdk_screen_get_default (), "monitors-changed",
 
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                                                                      G_CALLBACK (flashback_desktop_background_screen_size_changed), background);
 
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        gnome_bg_load_from_preferences (background->priv->gnome_bg, background->priv->gnome_settings);
 
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        g_signal_connect (background->priv->gnome_settings, "change-event",
 
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                          G_CALLBACK (flashback_desktop_background_settings_change_event), background);
 
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}
 
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static void
 
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flashback_desktop_background_class_init (FlashbackDesktopBackgroundClass *class)
 
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{
 
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        GObjectClass *object_class = G_OBJECT_CLASS (class);
 
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        object_class->finalize = flashback_desktop_background_finalize;
 
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        g_type_class_add_private (class, sizeof (FlashbackDesktopBackgroundPrivate));
 
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}
 
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FlashbackDesktopBackground *
 
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flashback_desktop_background_new (void)
 
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{
 
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        return g_object_new (FLASHBACK_TYPE_DESKTOP_BACKGROUND,
 
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                             NULL);
 
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}