[mutter] [MutterScreen] Added workareas-changed signal

[Tomas Frydrych <tomasf src gnome org>]

commit 8589e4f3d396789e488cd4d7a1499e51df20b304
Author: Tomas Frydrych <tf linux intel com>
Date:   Thu Sep 17 09:49:23 2009 +0100

    [MutterScreen] Added workareas-changed signal
    
    This signal is emitted when workarea of any workspace belonging to the screen
    changes.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=597009

 src/core/screen-private.h |    3 ++-
 src/core/screen.c         |   12 ++++++++++++
 2 files changed, 14 insertions(+), 1 deletions(-)
---
diff --git a/src/core/screen-private.h b/src/core/screen-private.h
index d6f28ce..a1ba83e 100644
--- a/src/core/screen-private.h
+++ b/src/core/screen-private.h
@@ -145,7 +145,8 @@ struct _MetaScreenClass
 {
   GObjectClass parent_class;
 
-  void (*restacked) (MetaScreen *);
+  void (*restacked)         (MetaScreen *);
+  void (*workareas_changed) (MetaScreen *);
 };
 
 MetaScreen*   meta_screen_new                 (MetaDisplay                *display,
diff --git a/src/core/screen.c b/src/core/screen.c
index 1ed502f..26890c8 100644
--- a/src/core/screen.c
+++ b/src/core/screen.c
@@ -85,6 +85,7 @@ enum
   WORKSPACE_REMOVED,
   WORKSPACE_SWITCHED,
   STARTUP_SEQUENCE_CHANGED,
+  WORKAREAS_CHANGED,
 
   LAST_SIGNAL
 };
@@ -217,6 +218,15 @@ meta_screen_class_init (MetaScreenClass *klass)
                   g_cclosure_marshal_VOID__VOID,
                   G_TYPE_NONE, 0);
 
+  screen_signals[WORKAREAS_CHANGED] =
+    g_signal_new ("workareas-changed",
+                  G_TYPE_FROM_CLASS (object_class),
+                  G_SIGNAL_RUN_LAST,
+                  G_STRUCT_OFFSET (MetaScreenClass, workareas_changed),
+                  NULL, NULL,
+                  g_cclosure_marshal_VOID__VOID,
+                  G_TYPE_NONE, 0);
+
   g_object_class_install_property (object_class,
                                    PROP_N_WORKSPACES,
                                    pspec);
@@ -2288,6 +2298,8 @@ set_work_area_hint (MetaScreen *screen)
 		   (guchar*) data, num_workspaces*4);
   g_free (data);
   meta_error_trap_pop (screen->display, FALSE);
+
+  g_signal_emit (screen, screen_signals[WORKAREAS_CHANGED], 0);
 }
 
 static gboolean