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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ASH_DISPLAY_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H
#define ASH_DISPLAY_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H
#include "ash/ash_export.h"
#include "ash/shell_observer.h"
#include "base/basictypes.h"
#include "chromeos/display/output_configurator.h"
namespace ash {
namespace internal {
struct Resolution;
// An object that observes changes in display configuration and
// update DisplayManagers.
class DisplayChangeObserver
: public chromeos::OutputConfigurator::StateController,
public chromeos::OutputConfigurator::Observer,
public ShellObserver {
public:
// Returns the resolution list.
ASH_EXPORT static std::vector<Resolution> GetResolutionList(
const chromeos::OutputConfigurator::OutputSnapshot& output);
DisplayChangeObserver();
virtual ~DisplayChangeObserver();
// chromeos::OutputConfigurator::StateController overrides:
virtual chromeos::OutputState GetStateForDisplayIds(
const std::vector<int64>& outputs) const OVERRIDE;
virtual bool GetResolutionForDisplayId(int64 display_id,
int* width,
int* height) const OVERRIDE;
// Overriden from chromeos::OutputConfigurator::Observer:
virtual void OnDisplayModeChanged(
const std::vector<chromeos::OutputConfigurator::OutputSnapshot>& outputs)
OVERRIDE;
// Overriden from ShellObserver:
virtual void OnAppTerminating() OVERRIDE;
private:
DISALLOW_COPY_AND_ASSIGN(DisplayChangeObserver);
};
} // namespace internal
} // namespace ash
#endif // ASH_DISPLAY_AURA_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H
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