window.c: Make opacity a public property.

Author: mtwebster

src/core/window-private.h

@@ -842,9 +842,6 @@ gboolean meta_window_has_transient_type   (MetaWindow *window);
 void meta_window_set_transient_for        (MetaWindow *window,
                                            MetaWindow *parent);
 
-void meta_window_set_opacity              (MetaWindow *window,
-                                           guint8      opacity);
-
 void meta_window_increase_opacity         (MetaWindow *window);
 void meta_window_decrease_opacity         (MetaWindow *window);
 

src/core/window.c

@@ -216,6 +216,7 @@ enum
   PROP_PROGRESS,
   PROP_PROGRESS_PULSE,
   PROP_TILE_MODE,
+  PROP_OPACITY,
   PROP_LAST,
 };
 
@@ -447,6 +448,9 @@ meta_window_get_property(GObject         *object,
     case PROP_TILE_MODE:
       g_value_set_enum (value, win->tile_mode);
       break;
+    case PROP_OPACITY:
+      g_value_set_uint (value, win->opacity);
+      break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
@@ -659,6 +663,15 @@ meta_window_class_init (MetaWindowClass *klass)
                        META_TILE_NONE,
                        G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
 
+  obj_props[PROP_OPACITY] =
+    g_param_spec_uint ("opacity",
+                       "Opacity",
+                       "The window's 'real' opacity (not the current opacity of the window actor",
+                       0,
+                       0xFF,
+                       0xFF,
+                       G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
   g_object_class_install_properties (object_class, PROP_LAST, obj_props);
 
   window_signals[WORKSPACE_CHANGED] =
@@ -8618,9 +8631,21 @@ void
 meta_window_set_opacity (MetaWindow *window,
                          guint8      opacity)
 {
+  g_return_if_fail (META_IS_WINDOW (window));
+
   window->opacity = opacity;
 
   meta_compositor_window_opacity_changed (window->display->compositor, window);
+
+  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_OPACITY]);
+}
+
+guint8
+meta_window_get_opacity (MetaWindow *window)
+{
+  g_return_val_if_fail (META_IS_WINDOW (window), 0xFF);
+
+  return window->opacity;
 }
 
 #define OPACITY_STEP 32

src/meta/window.h

@@ -458,4 +458,11 @@ MetaWindowClientType meta_window_get_client_type (MetaWindow *window);
 META_EXPORT
 const char *meta_window_get_icon_name (MetaWindow *window);
 
+META_EXPORT
+void meta_window_set_opacity              (MetaWindow *window,
+                                           guint8      opacity);
+
+META_EXPORT
+guint8 meta_window_get_opacity              (MetaWindow *window);
+
 #endif