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_VIEWS_WIN_SCOPED_FULLSCREEN_VISIBILITY_H_ 6#define UI_VIEWS_WIN_SCOPED_FULLSCREEN_VISIBILITY_H_ 7 8#include <windows.h> 9 10#include <map> 11 12#include "base/basictypes.h" 13#include "ui/views/views_export.h" 14 15namespace views { 16 17// Scoping class that ensures a HWND remains hidden while it enters or leaves 18// the fullscreen state. This reduces some flicker-jank that an application UI 19// might suffer. 20class VIEWS_EXPORT ScopedFullscreenVisibility { 21 public: 22 explicit ScopedFullscreenVisibility(HWND hwnd); 23 ~ScopedFullscreenVisibility(); 24 25 // Returns true if |hwnd| is currently hidden due to instance(s) of this 26 // class. 27 static bool IsHiddenForFullscreen(HWND hwnd); 28 29 private: 30 typedef std::map<HWND, int> FullscreenHWNDs; 31 32 HWND hwnd_; 33 34 static FullscreenHWNDs* full_screen_windows_; 35 36 DISALLOW_COPY_AND_ASSIGN(ScopedFullscreenVisibility); 37}; 38 39} // namespace views 40 41#endif // UI_VIEWS_WIN_SCOPED_FULLSCREEN_VISIBILITY_H_ 42