minimize_button_metrics_win.h revision 4e180b6a0b4720a9b8e9e959a882386f690f08ff
1ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// Use of this source code is governed by a BSD-style license that can be 3ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// found in the LICENSE file. 4ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 5ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao#ifndef CHROME_BROWSER_UI_VIEWS_FRAME_MINIMIZE_BUTTON_METRICS_WIN_H_ 6ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao#define CHROME_BROWSER_UI_VIEWS_FRAME_MINIMIZE_BUTTON_METRICS_WIN_H_ 7ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 8ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao#include <windows.h> 9ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 10ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao#include "base/basictypes.h" 11ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 12ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// Class that implements obtaining the X coordinate of the native minimize 13ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// button for the native frame on Windows. 14ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// This is a separate class because obtaining it is somewhat tricky and this 15ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// code is shared between BrowserDesktopRootWindowHostWin and BrowserFrameWin. 16ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liaoclass MinimizeButtonMetrics { 17ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao public: 18ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao MinimizeButtonMetrics(); 19ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao ~MinimizeButtonMetrics(); 20ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 21ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao void Init(HWND hwnd); 22ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 23ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao // Obtain the X offset of the native minimize button. Since Windows can lie 24ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao // to us if we call this at the wrong moment, this might come from a cached 25ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao // value rather than read when called. 26ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao int GetMinimizeButtonOffsetX() const; 27ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 28ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao // Must be called when hwnd_ is activated to update the minimize button 29ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao // position cache. 30ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao void OnHWNDActivated(); 31ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 32ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao private: 33ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao // Gets the value for GetMinimizeButtonOffsetX(), caching if found. 34ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao int GetAndCacheMinimizeButtonOffsetX() const; 35ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 36ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao HWND hwnd_; 37ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 38ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao // Cached offset of the minimize button. If RTL this is the location of the 39ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao // minimize button, if LTR this is the offset from the right edge of the 40ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao // client area to the minimize button. 41ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao mutable int cached_minimize_button_x_delta_; 42ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 43ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao // Static cache of |cached_minimize_button_x_delta_|. 44ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao static int last_cached_minimize_button_x_delta_; 45ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 46ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao // Has OnHWNDActivated() been invoked? 47ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao bool was_activated_; 48ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 49ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao DISALLOW_COPY_AND_ASSIGN(MinimizeButtonMetrics); 50ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao}; 51ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 52ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao#endif // CHROME_BROWSER_UI_VIEWS_FRAME_MINIMIZE_BUTTON_METRICS_WIN_H_ 53ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao