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Unified Diff: ui/base/win/singleton_hwnd.h

Issue 9370026: Respect the system ClearType setting in RenderTextWin. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: Created 8 years, 10 months ago
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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_
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