display_error_observer_chromeos.h revision a1401311d1ab56c4ed0a474bd38c108f75cb0cd9 
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_ERROR_OBSERVER_CHROMEOS_H_
6#define ASH_DISPLAY_DISPLAY_ERROR_OBSERVER_CHROMEOS_H_
7
8#include "ash/ash_export.h"
9#include "base/compiler_specific.h"
10#include "base/strings/string16.h"
11#include "ui/display/chromeos/output_configurator.h"
12
13namespace ash {
14namespace internal {
15
16// The class to observe the output failures and shows the error dialog when
17// necessary.
18class ASH_EXPORT DisplayErrorObserver
19    : public ui::OutputConfigurator::Observer {
20 public:
21  DisplayErrorObserver();
22  virtual ~DisplayErrorObserver();
23
24  // ui::OutputConfigurator::Observer overrides:
25  virtual void OnDisplayModeChangeFailed(ui::OutputState failed_new_state)
26      OVERRIDE;
27
28 private:
29  friend class DisplayErrorObserverTest;
30
31  base::string16 GetTitleOfDisplayErrorNotificationForTest();
32
33  DISALLOW_COPY_AND_ASSIGN(DisplayErrorObserver);
34};
35
36}  // namespace internal
37}  // namespace ash
38
39#endif  // ASH_DISPLAY_DISPLAY_ERROR_OBSERVER_CHROMEOS_H_
40