display_change_observer_chromeos.h revision 23730a6e56a168d1879203e4b3819bb36e3d8f1f 
1// Copyright 2013 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 ASH_DISPLAY_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H
6#define ASH_DISPLAY_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H
7
8#include "ash/ash_export.h"
9#include "ash/shell_observer.h"
10#include "base/basictypes.h"
11#include "ui/display/chromeos/output_configurator.h"
12
13namespace ash {
14namespace internal {
15
16struct DisplayMode;
17
18// An object that observes changes in display configuration and
19// update DisplayManagers.
20class DisplayChangeObserver : public ui::OutputConfigurator::StateController,
21                              public ui::OutputConfigurator::Observer,
22                              public ShellObserver {
23 public:
24  // Returns the resolution list.
25  ASH_EXPORT static std::vector<DisplayMode> GetDisplayModeList(
26      const ui::OutputConfigurator::DisplayState& output);
27
28  DisplayChangeObserver();
29  virtual ~DisplayChangeObserver();
30
31  // ui::OutputConfigurator::StateController overrides:
32  virtual ui::OutputState GetStateForDisplayIds(
33      const std::vector<int64>& outputs) const OVERRIDE;
34  virtual bool GetResolutionForDisplayId(int64 display_id,
35                                         gfx::Size* size) const OVERRIDE;
36
37  // Overriden from ui::OutputConfigurator::Observer:
38  virtual void OnDisplayModeChanged(
39      const ui::OutputConfigurator::DisplayStateList& outputs) OVERRIDE;
40
41  // Overriden from ShellObserver:
42  virtual void OnAppTerminating() OVERRIDE;
43
44 private:
45  DISALLOW_COPY_AND_ASSIGN(DisplayChangeObserver);
46};
47
48}  // namespace internal
49}  // namespace ash
50
51#endif  // ASH_DISPLAY_AURA_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H
52