display_change_observer_chromeos.h revision f2477e01787aa58f445919b809d89e252beef54f
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 Resolution; 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<Resolution> GetResolutionList( 27 const chromeos::OutputConfigurator::OutputSnapshot& output); 28 29 DisplayChangeObserver(); 30 virtual ~DisplayChangeObserver(); 31 32 // chromeos::OutputConfigurator::StateController overrides: 33 virtual chromeos::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