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// Copyright 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 "cc/input/scrollbar_animation_controller_linear_fade.h"
#include "base/time/time.h"
#include "cc/layers/layer_impl.h"
#include "cc/layers/scrollbar_layer_impl_base.h"
namespace cc {
scoped_ptr<ScrollbarAnimationControllerLinearFade>
ScrollbarAnimationControllerLinearFade::Create(
int scroll_layer_id,
ScrollbarAnimationControllerClient* client,
base::TimeDelta delay_before_starting,
base::TimeDelta resize_delay_before_starting,
base::TimeDelta duration) {
return make_scoped_ptr(new ScrollbarAnimationControllerLinearFade(
scroll_layer_id, client, delay_before_starting,
resize_delay_before_starting, duration));
}
ScrollbarAnimationControllerLinearFade::ScrollbarAnimationControllerLinearFade(
int scroll_layer_id,
ScrollbarAnimationControllerClient* client,
base::TimeDelta delay_before_starting,
base::TimeDelta resize_delay_before_starting,
base::TimeDelta duration)
: ScrollbarAnimationController(scroll_layer_id,
client,
delay_before_starting,
resize_delay_before_starting,
duration) {}
ScrollbarAnimationControllerLinearFade::
~ScrollbarAnimationControllerLinearFade() {}
void ScrollbarAnimationControllerLinearFade::RunAnimationFrame(float progress) {
ApplyOpacityToScrollbars(1.f - progress);
client_->SetNeedsRedrawForScrollbarAnimation();
if (progress == 1.f)
StopAnimation();
}
void ScrollbarAnimationControllerLinearFade::DidScrollUpdate(bool on_resize) {
ScrollbarAnimationController::DidScrollUpdate(on_resize);
ApplyOpacityToScrollbars(1.f);
}
void ScrollbarAnimationControllerLinearFade::ApplyOpacityToScrollbars(
float opacity) {
for (ScrollbarLayerImplBase* scrollbar : Scrollbars()) {
if (!scrollbar->is_overlay_scrollbar())
continue;
scrollbar->OnOpacityAnimated(scrollbar->CanScrollOrientation() ? opacity
: 0);
}
}
} // namespace cc