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   ~DisplayErrorObserver() override;
  22
  23   // ui::DisplayConfigurator::Observer overrides:
  24   void OnDisplayModeChangeFailed(
  25       const ui::DisplayConfigurator::DisplayStateList& displays,
  26       ui::MultipleDisplayState failed_new_state) override;
  27
  28  private:
  29   friend class DisplayErrorObserverTest;
  30
  31   base::string16 GetDisplayErrorNotificationMessageForTest();
  32
  33   DISALLOW_COPY_AND_ASSIGN(DisplayErrorObserver);
  34 };
  35
  36 }  // namespace ash
  37
  38 #endif  // ASH_DISPLAY_DISPLAY_ERROR_OBSERVER_CHROMEOS_H_