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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/compositor/float_animation_curve_adapter.h"
#include "cc/base/time_util.h"
namespace ui {
FloatAnimationCurveAdapter::FloatAnimationCurveAdapter(
gfx::Tween::Type tween_type,
float initial_value,
float target_value,
base::TimeDelta duration)
: tween_type_(tween_type),
initial_value_(initial_value),
target_value_(target_value),
duration_(duration) {
}
base::TimeDelta FloatAnimationCurveAdapter::Duration() const {
return duration_;
}
scoped_ptr<cc::AnimationCurve> FloatAnimationCurveAdapter::Clone() const {
return make_scoped_ptr(new FloatAnimationCurveAdapter(
tween_type_, initial_value_, target_value_, duration_));
}
float FloatAnimationCurveAdapter::GetValue(base::TimeDelta t) const {
if (t >= duration_)
return target_value_;
if (t <= base::TimeDelta())
return initial_value_;
double progress = cc::TimeUtil::Divide(t, duration_);
return gfx::Tween::FloatValueBetween(
gfx::Tween::CalculateValue(tween_type_, progress),
initial_value_,
target_value_);
}
} // namespace ui
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