ash/display/display_error_observer_chromeos.h

   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/display_configurator.h"
  12
  13 namespace ash {
  14
  15 // The class to observe the output failures and shows the error dialog when
  16 // necessary.
  17 class ASH_EXPORT DisplayErrorObserver
  18     : public ui::DisplayConfigurator::Observer {
  19  public:
  20   DisplayErrorObserver();
  21   virtual ~DisplayErrorObserver();
  22
  23   // ui::DisplayConfigurator::Observer overrides:
  24   virtual void OnDisplayModeChangeFailed(
  25       ui::MultipleDisplayState failed_new_state) override;
  26
  27  private:
  28   friend class DisplayErrorObserverTest;
  29
  30   base::string16 GetTitleOfDisplayErrorNotificationForTest();
  31
  32   DISALLOW_COPY_AND_ASSIGN(DisplayErrorObserver);
  33 };
  34
  35 }  // namespace ash
  36
  37 #endif  // ASH_DISPLAY_DISPLAY_ERROR_OBSERVER_CHROMEOS_H_