1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "ash/shelf/background_animator.h"
13 // Duration of the background animation.
14 const int kBackgroundDurationMS = 1000;
18 BackgroundAnimator::BackgroundAnimator(BackgroundAnimatorDelegate* delegate,
21 : delegate_(delegate),
22 min_alpha_(min_alpha),
23 max_alpha_(max_alpha),
25 paints_background_(false),
27 animation_.SetSlideDuration(kBackgroundDurationMS);
30 BackgroundAnimator::~BackgroundAnimator() {
33 void BackgroundAnimator::SetDuration(int time_in_ms) {
34 animation_.SetSlideDuration(time_in_ms);
37 void BackgroundAnimator::SetPaintsBackground(bool value, ChangeType type) {
38 if (paints_background_ == value)
40 paints_background_ = value;
41 if (type == CHANGE_IMMEDIATE && !animation_.is_animating()) {
42 animation_.Reset(value ? 1.0f : 0.0f);
43 AnimationProgressed(&animation_);
46 if (paints_background_)
52 void BackgroundAnimator::AnimationProgressed(const gfx::Animation* animation) {
53 int alpha = animation->CurrentValueBetween(min_alpha_, max_alpha_);
57 delegate_->UpdateBackground(alpha_);
60 } // namespace internal