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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.
#include "ui/gfx/animation/throb_animation.h"
#include <limits>
namespace gfx {
ThrobAnimation::ThrobAnimation(AnimationDelegate* target)
: SlideAnimation(target) {}
void ThrobAnimation::StartThrobbing(int cycles_til_stop) {
if (cycles_til_stop < 0)
cycles_til_stop = std::numeric_limits<int>::max();
cycles_remaining_ = cycles_til_stop;
throbbing_ = true;
SlideAnimation::SetSlideDuration(throb_duration_);
if (is_animating())
return; // We're already running, we'll cycle when current loop finishes.
if (IsShowing())
SlideAnimation::Hide();
else
SlideAnimation::Show();
}
void ThrobAnimation::Reset(double value) {
StopThrobbing();
SlideAnimation::Reset(value);
}
void ThrobAnimation::Show() {
StopThrobbing();
SlideAnimation::Show();
}
void ThrobAnimation::Hide() {
StopThrobbing();
SlideAnimation::Hide();
}
void ThrobAnimation::SetSlideDuration(int duration) {
slide_duration_ = duration;
}
void ThrobAnimation::Step(base::TimeTicks time_now) {
LinearAnimation::Step(time_now);
if (!is_animating() && throbbing_) {
// Were throbbing a finished a cycle. Start the next cycle unless we're at
// the end of the cycles, in which case we stop.
cycles_remaining_--;
if (IsShowing()) {
// We want to stop hidden, hence this doesn't check cycles_remaining_.
SlideAnimation::Hide();
} else if (cycles_remaining_ > 0) {
SlideAnimation::Show();
} else {
// We're done throbbing.
throbbing_ = false;
}
}
}
void ThrobAnimation::StopThrobbing() {
SlideAnimation::SetSlideDuration(slide_duration_);
cycles_remaining_ = 0;
throbbing_ = false;
}
} // namespace gfx