display_change_observer_chromeos.h revision 5d1f7b1de12d16ceb2c938c56701a3e8bfa558f7 
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 "chromeos/display/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
21    : public chromeos::OutputConfigurator::StateController,
22      public chromeos::OutputConfigurator::Observer,
23      public ShellObserver {
24 public:
25  // Returns the resolution list.
26  ASH_EXPORT static std::vector<DisplayMode> GetDisplayModeList(
27      const chromeos::OutputConfigurator::OutputSnapshot& output);
28
29  DisplayChangeObserver();
30  virtual ~DisplayChangeObserver();
31
32  // chromeos::OutputConfigurator::StateController overrides:
33  virtual ui::OutputState GetStateForDisplayIds(
34      const std::vector<int64>& outputs) const OVERRIDE;
35  virtual bool GetResolutionForDisplayId(int64 display_id,
36                                         int* width,
37                                         int* height) const OVERRIDE;
38
39  // Overriden from chromeos::OutputConfigurator::Observer:
40  virtual void OnDisplayModeChanged(
41      const std::vector<chromeos::OutputConfigurator::OutputSnapshot>& outputs)
42      OVERRIDE;
43
44  // Overriden from ShellObserver:
45  virtual void OnAppTerminating() OVERRIDE;
46
47 private:
48  DISALLOW_COPY_AND_ASSIGN(DisplayChangeObserver);
49};
50
51}  // namespace internal
52}  // namespace ash
53
54#endif  // ASH_DISPLAY_AURA_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H
55