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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_WM_GESTURES_LONG_PRESS_AFFORDANCE_HANDLER_H_
#define ASH_WM_GESTURES_LONG_PRESS_AFFORDANCE_HANDLER_H_
#include "base/macros.h"
#include "base/timer/timer.h"
#include "ui/aura/window_observer.h"
#include "ui/gfx/animation/linear_animation.h"
#include "ui/gfx/geometry/point.h"
namespace ui {
class GestureEvent;
}
namespace ash {
namespace test {
class SystemGestureEventFilterTest;
}
// LongPressAffordanceHandler displays an animated affordance that is shown
// on a TAP_DOWN gesture. The animation sequence consists of two parts:
// The first part is a grow animation that starts at semi-long-press and
// completes on a long-press gesture. The affordance animates to full size
// during grow animation.
// The second part is a shrink animation that start after grow and shrinks the
// affordance out of view.
class LongPressAffordanceHandler : public gfx::LinearAnimation,
public aura::WindowObserver {
public:
LongPressAffordanceHandler();
~LongPressAffordanceHandler() override;
// Displays or removes long press affordance according to the |event|.
void ProcessEvent(aura::Window* target, ui::GestureEvent* event);
private:
friend class ash::test::SystemGestureEventFilterTest;
class LongPressAffordanceView;
enum LongPressAnimationType {
NONE,
GROW_ANIMATION,
SHRINK_ANIMATION,
};
void StartAnimation();
void StopAffordance();
void SetTapDownTarget(aura::Window* target);
// Overridden from gfx::LinearAnimation.
void AnimateToState(double state) override;
void AnimationStopped() override;
// Overridden from aura::WindowObserver.
void OnWindowDestroying(aura::Window* window) override;
scoped_ptr<LongPressAffordanceView> view_;
gfx::Point tap_down_location_;
base::OneShotTimer timer_;
aura::Window* tap_down_target_;
LongPressAnimationType current_animation_type_;
DISALLOW_COPY_AND_ASSIGN(LongPressAffordanceHandler);
};
} // namespace ash
#endif // ASH_WM_GESTURES_LONG_PRESS_AFFORDANCE_HANDLER_H_
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