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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 UI_GFX_ANIMATION_THROB_ANIMATION_H_
#define UI_GFX_ANIMATION_THROB_ANIMATION_H_
#include "base/macros.h"
#include "ui/gfx/animation/slide_animation.h"
namespace gfx {
// A subclass of SlideAnimation that can continually slide. All of the Animation
// methods behave like that of SlideAnimation: transition to the next state.
// The StartThrobbing method causes the ThrobAnimation to cycle between hidden
// and shown for a set number of cycles.
//
// A ThrobAnimation has two durations: the duration used when behavior like
// a SlideAnimation, and the duration used when throbbing.
class ANIMATION_EXPORT ThrobAnimation : public SlideAnimation {
public:
explicit ThrobAnimation(AnimationDelegate* target);
~ThrobAnimation() override {}
// Starts throbbing. cycles_til_stop gives the number of cycles to do before
// stopping. A negative value means "throb indefinitely".
void StartThrobbing(int cycles_til_stop);
// Sets the duration of the slide animation when throbbing.
void SetThrobDuration(base::TimeDelta duration) {
throb_duration_ = duration;
}
// Overridden to reset to the slide duration.
void Reset(double value = 0) override;
void Show() override;
void Hide() override;
// Overridden to maintain the slide duration.
void SetSlideDuration(base::TimeDelta duration) override;
// The number of cycles remaining until the animation stops.
void set_cycles_remaining(int value) { cycles_remaining_ = value; }
int cycles_remaining() const { return cycles_remaining_; }
protected:
// Overriden to continually throb (assuming we're throbbing).
void Step(base::TimeTicks time_now) override;
private:
// Stops throbbing; as a result this will behave like a SlideAnimation.
void StopThrobbing();
// Duration of the slide animation.
base::TimeDelta slide_duration_ = GetSlideDuration();
// Duration of the slide animation when throbbing.
base::TimeDelta throb_duration_ = base::TimeDelta::FromMilliseconds(400);
// If throbbing, this is the number of cycles left.
int cycles_remaining_ = 0;
// Are we throbbing?
bool throbbing_ = false;
DISALLOW_COPY_AND_ASSIGN(ThrobAnimation);
};
} // namespace gfx
#endif // UI_GFX_ANIMATION_THROB_ANIMATION_H_
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