Index: ui/base/win/singleton_hwnd.h |
=================================================================== |
--- ui/base/win/singleton_hwnd.h (revision 0) |
+++ ui/base/win/singleton_hwnd.h (revision 0) |
@@ -0,0 +1,59 @@ |
+// Copyright (c) 2012 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef UI_BASE_WIN_SINGLETON_HWND_H_ |
+#define UI_BASE_WIN_SINGLETON_HWND_H_ |
+#pragma once |
+ |
+#include <windows.h> |
+#include <vector> |
+ |
+#include "base/basictypes.h" |
+#include "base/callback_forward.h" |
+#include "base/observer_list.h" |
+ |
+template<typename T> struct DefaultSingletonTraits; |
+ |
+namespace ui { |
+ |
+// Singleton message-only HWND that allows interested clients to receive WM_* |
+// notifications. |
+class SingletonHwnd { |
+ public: |
+ static SingletonHwnd* GetInstance(); |
+ |
+ // Observer interface for receiving Windows WM_* notifications. |
+ class Observer { |
+ public: |
+ virtual void OnWndProc(HWND hwnd, |
+ UINT message, |
+ WPARAM wparam, |
+ LPARAM lparam) = 0; |
+ }; |
+ |
+ // Add/remove observer to receive WM_* notifications. |
+ void AddObserver(Observer* observer); |
+ void RemoveObserver(Observer* observer); |
+ |
+ // Windows callback for WM_* notifications. |
+ void OnWndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam); |
+ |
+ private: |
+ friend struct DefaultSingletonTraits<SingletonHwnd>; |
+ |
+ SingletonHwnd(); |
+ ~SingletonHwnd(); |
+ |
+ // Listener HWND for WM_* notifications. |
+ HWND listener_window_; |
+ |
+ // List of registered observers. |
+ ObserverList<Observer> observer_list_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(SingletonHwnd); |
+}; |
+ |
+} // namespace ui |
+ |
+#endif // UI_BASE_WIN_SINGLETON_HWND_H_ |