Home | History | Annotate | Download | only in x 
      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef UI_BASE_X_ROOT_WINDOW_PROPERTY_WATCHER_X_H_
      6 #define UI_BASE_X_ROOT_WINDOW_PROPERTY_WATCHER_X_H_
      7 
      8 #include <gdk/gdk.h>
      9 
     10 #include "base/basictypes.h"
     11 #include "ui/base/gtk/gtk_signal.h"
     12 #include "ui/base/ui_export.h"
     13 
     14 template <typename T> struct DefaultSingletonTraits;
     15 
     16 namespace ui {
     17 
     18 namespace internal {
     19 
     20 // This class keeps track of changes to properties on the root window. This is
     21 // not to be used directly. Implement a watcher for the specific property you're
     22 // interested in.
     23 class RootWindowPropertyWatcherX {
     24  public:
     25   static RootWindowPropertyWatcherX* GetInstance();
     26 
     27  private:
     28   friend struct DefaultSingletonTraits<RootWindowPropertyWatcherX>;
     29 
     30   RootWindowPropertyWatcherX();
     31   ~RootWindowPropertyWatcherX();
     32 
     33   // Callback for PropertyChange XEvents.
     34   CHROMEG_CALLBACK_1(RootWindowPropertyWatcherX, GdkFilterReturn,
     35                      OnWindowXEvent, GdkXEvent*, GdkEvent*);
     36 
     37   DISALLOW_COPY_AND_ASSIGN(RootWindowPropertyWatcherX);
     38 };
     39 
     40 }  // namespace internal
     41 
     42 }  // namespace ui
     43 
     44 #endif  // UI_BASE_X_ROOT_WINDOW_PROPERTY_WATCHER_X_H_
     45