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_H_
6 #define ASH_DISPLAY_DISPLAY_ERROR_OBSERVER_H_
7 
8 #include "ash/ash_export.h"
9 #include "base/compiler_specific.h"
10 #include "base/macros.h"
11 #include "base/strings/string16.h"
12 #include "ui/display/manager/display_configurator.h"
13 
14 namespace ash {
15 
16 // The class to observe the output failures and shows the error dialog when
17 // necessary.
18 class ASH_EXPORT DisplayErrorObserver
19     : public display::DisplayConfigurator::Observer {
20  public:
21   DisplayErrorObserver();
22   ~DisplayErrorObserver() override;
23 
24   // display::DisplayConfigurator::Observer overrides:
25   void OnDisplayModeChangeFailed(
26       const display::DisplayConfigurator::DisplayStateList& displays,
27       display::MultipleDisplayState failed_new_state) override;
28 
29  private:
30   DISALLOW_COPY_AND_ASSIGN(DisplayErrorObserver);
31 };
32 
33 }  // namespace ash
34 
35 #endif  // ASH_DISPLAY_DISPLAY_ERROR_OBSERVER_H_
36