display_settings_provider_win.h revision eb525c5499e34cc9c4b825d6d9e75bb07cc06ace 
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 CHROME_BROWSER_UI_PANELS_DISPLAY_SETTINGS_PROVIDER_WIN_H_
6#define CHROME_BROWSER_UI_PANELS_DISPLAY_SETTINGS_PROVIDER_WIN_H_
7
8#include "chrome/browser/ui/panels/display_settings_provider.h"
9
10#include <windows.h>
11#include "base/compiler_specific.h"
12#include "base/timer/timer.h"
13
14class DisplaySettingsProviderWin : public DisplaySettingsProvider {
15 public:
16  DisplaySettingsProviderWin();
17  virtual ~DisplaySettingsProviderWin();
18
19 protected:
20  // Overridden from DisplaySettingsProvider:
21  virtual void OnDisplaySettingsChanged() OVERRIDE;
22  virtual bool IsAutoHidingDesktopBarEnabled(
23      DesktopBarAlignment alignment) OVERRIDE;
24  virtual int GetDesktopBarThickness(
25      DesktopBarAlignment alignment) const OVERRIDE;
26  virtual DesktopBarVisibility GetDesktopBarVisibility(
27      DesktopBarAlignment alignment) const OVERRIDE;
28
29  int GetDesktopBarThicknessFromBounds(
30      DesktopBarAlignment alignment, const gfx::Rect& taskbar_bounds) const;
31  DesktopBarVisibility GetDesktopBarVisibilityFromBounds(
32      DesktopBarAlignment alignment, const gfx::Rect& taskbar_bounds) const;
33
34 private:
35  struct Taskbar {
36    HWND window;
37    DesktopBarVisibility visibility;
38    int thickness;
39  };
40
41  // Callback to perform periodic check for taskbar changes.
42  void OnPollingTimer();
43
44  // Returns true if there is at least one auto-hiding taskbar found.
45  bool CheckTaskbars(bool notify_observer);
46
47  gfx::Rect GetBounds(DesktopBarAlignment alignment) const;
48
49  // Maximum number of taskbars we're interested in: bottom, left, and right.
50  static const int kMaxTaskbars = 3;
51
52  HMONITOR monitor_;
53  Taskbar taskbars_[kMaxTaskbars];
54  base::RepeatingTimer<DisplaySettingsProviderWin> polling_timer_;
55
56  DISALLOW_COPY_AND_ASSIGN(DisplaySettingsProviderWin);
57};
58
59#endif  // CHROME_BROWSER_UI_PANELS_DISPLAY_SETTINGS_PROVIDER_WIN_H_
60