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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 <vector>
#include "ash/ash_export.h"
#include "ash/shell_observer.h"
#include "base/basictypes.h"
#include "ui/display/chromeos/display_configurator.h"
#include "ui/events/devices/input_device_event_observer.h"
namespace ash {
class DisplayInfo;
struct DisplayMode;
class DisplaySnapshot;
// An object that observes changes in display configuration and
// update DisplayManagers.
class DisplayChangeObserver : public ui::DisplayConfigurator::StateController,
public ui::DisplayConfigurator::Observer,
public ui::InputDeviceEventObserver,
public ShellObserver {
public:
// Returns the mode list for internal display.
ASH_EXPORT static std::vector<DisplayMode> GetInternalDisplayModeList(
const DisplayInfo& display_info,
const ui::DisplaySnapshot& output);
// Returns the resolution list.
ASH_EXPORT static std::vector<DisplayMode> GetExternalDisplayModeList(
const ui::DisplaySnapshot& output);
DisplayChangeObserver();
~DisplayChangeObserver() override;
// ui::DisplayConfigurator::StateController overrides:
ui::MultipleDisplayState GetStateForDisplayIds(
const ui::DisplayConfigurator::DisplayStateList& outputs) const override;
bool GetResolutionForDisplayId(int64 display_id,
gfx::Size* size) const override;
// Overriden from ui::DisplayConfigurator::Observer:
void OnDisplayModeChanged(
const ui::DisplayConfigurator::DisplayStateList& outputs) override;
void OnDisplayModeChangeFailed(
const ui::DisplayConfigurator::DisplayStateList& displays,
ui::MultipleDisplayState failed_new_state) override;
// Overriden from ui::InputDeviceEventObserver:
void OnTouchscreenDeviceConfigurationChanged() override;
// Overriden from ShellObserver:
void OnAppTerminating() override;
// Exposed for testing.
ASH_EXPORT static float FindDeviceScaleFactor(float dpi);
private:
DISALLOW_COPY_AND_ASSIGN(DisplayChangeObserver);
};
} // namespace ash
#endif // ASH_DISPLAY_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H_
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