Reorganizes utility functions.

[evince.git] / shell / ev-utils.c

diff --git a/shell/ev-utils.c b/shell/ev-utils.c
index 90217262f3dbc2a16041d07346affbfd4fa5ee21..fabdeaa16801e4ce203be4e5a1b4d971fb6b6992 100644 (file)
--- a/shell/ev-utils.c
+++ b/shell/ev-utils.c
@@ -369,3 +369,43 @@ ev_gui_menu_position_tree_selection (GtkMenu   *menu,
        ev_gui_sanitise_popup_position (menu, widget, x, y);
 }
 
+/**
+ * get_num_monitors: Get the number of user monitors.
+ * @window: optional GtkWindow to look at.
+ *
+ * Returns: Number of monitors, -1 if uncertain situation (like multiple screens)
+ */
+gint 
+get_num_monitors (GtkWindow * window)
+{
+       GdkDisplay * display; 
+       GdkScreen * screen;
+       gint num_screen = gdk_display_get_n_screens(display);
+       
+       display = gdk_display_get_default();
+       
+       if (num_screen != 1)
+               return -1;
+       
+       if (window)
+               screen = gtk_window_get_screen(window);
+       else
+               screen = gdk_display_get_screen(display, 0);
+
+       return gdk_screen_get_n_monitors(screen);
+}
+
+gdouble
+get_screen_dpi (GtkWindow * window)
+{
+       GdkScreen *screen;
+       gdouble    xdpi, ydpi;
+
+       screen = gtk_window_get_screen (window);
+
+       xdpi = 25.4 * gdk_screen_get_width (screen) / gdk_screen_get_width_mm (screen);
+       ydpi = 25.4 * gdk_screen_get_height (screen) / gdk_screen_get_height_mm (screen);
+       
+       return (xdpi + ydpi) / 2.0;
+}
+