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// Copyright (c) 2012 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_SYSTEM_BRIGHTNESS_TRAY_BRIGHTNESS_H_
#define ASH_SYSTEM_BRIGHTNESS_TRAY_BRIGHTNESS_H_
#include "ash/system/brightness/brightness_observer.h"
#include "ash/system/tray/system_tray_item.h"
#include "base/compiler_specific.h"
#include "base/memory/weak_ptr.h"
namespace ash {
namespace internal {
namespace tray {
class BrightnessView;
}
class TrayBrightness : public SystemTrayItem,
public BrightnessObserver {
public:
explicit TrayBrightness(SystemTray* system_tray);
virtual ~TrayBrightness();
private:
// Sends a request to get the current screen brightness so |current_percent_|
// can be initialized.
void GetInitialBrightness();
// Updates |current_percent_| with the initial brightness requested by
// GetInitialBrightness(), if we haven't seen the brightness already in the
// meantime.
void HandleInitialBrightness(double percent);
// Overridden from SystemTrayItem.
virtual views::View* CreateTrayView(user::LoginStatus status) OVERRIDE;
virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE;
virtual views::View* CreateDetailedView(user::LoginStatus status) OVERRIDE;
virtual void DestroyTrayView() OVERRIDE;
virtual void DestroyDefaultView() OVERRIDE;
virtual void DestroyDetailedView() OVERRIDE;
virtual void UpdateAfterLoginStatusChange(user::LoginStatus status) OVERRIDE;
virtual bool ShouldHideArrow() const OVERRIDE;
virtual bool ShouldShowLauncher() const OVERRIDE;
// Overridden from BrightnessObserver.
virtual void OnBrightnessChanged(double percent,
bool user_initiated) OVERRIDE;
base::WeakPtrFactory<TrayBrightness> weak_ptr_factory_;
tray::BrightnessView* brightness_view_;
// Was |brightness_view_| created for CreateDefaultView() rather than
// CreateDetailedView()? Used to avoid resetting |brightness_view_|
// inappropriately in DestroyDefaultView() or DestroyDetailedView().
bool is_default_view_;
// Brightness level in the range [0.0, 100.0] that we've heard about most
// recently.
double current_percent_;
// Has |current_percent_| been initialized?
bool got_current_percent_;
DISALLOW_COPY_AND_ASSIGN(TrayBrightness);
};
} // namespace internal
} // namespace ash
#endif // ASH_SYSTEM_BRIGHTNESS_TRAY_BRIGHTNESS_H_
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