scoped_layer_animation_settings.h revision eb525c5499e34cc9c4b825d6d9e75bb07cc06ace 
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.
4
5#ifndef UI_COMPOSITOR_SCOPED_LAYER_ANIMATION_SETTINGS_H_
6#define UI_COMPOSITOR_SCOPED_LAYER_ANIMATION_SETTINGS_H_
7
8#include <set>
9
10#include "base/time/time.h"
11
12#include "ui/base/animation/tween.h"
13#include "ui/compositor/compositor_export.h"
14#include "ui/compositor/layer_animator.h"
15
16namespace ui {
17
18class ImplicitAnimationObserver;
19class LayerAnimationObserver;
20
21// Scoped settings allow you to temporarily change the animator's settings and
22// these changes are reverted when the object is destroyed. NOTE: when the
23// settings object is created, it applies the default transition duration
24// (200ms).
25class COMPOSITOR_EXPORT ScopedLayerAnimationSettings {
26 public:
27  explicit ScopedLayerAnimationSettings(LayerAnimator* animator);
28  virtual ~ScopedLayerAnimationSettings();
29
30  void AddObserver(ImplicitAnimationObserver* observer);
31
32  void SetTransitionDuration(base::TimeDelta duration);
33  base::TimeDelta GetTransitionDuration() const;
34
35  void SetTweenType(Tween::Type tween_type);
36  Tween::Type GetTweenType() const;
37
38  void SetPreemptionStrategy(LayerAnimator::PreemptionStrategy strategy);
39  LayerAnimator::PreemptionStrategy GetPreemptionStrategy() const;
40
41 private:
42  LayerAnimator* animator_;
43  base::TimeDelta old_transition_duration_;
44  Tween::Type old_tween_type_;
45  LayerAnimator::PreemptionStrategy old_preemption_strategy_;
46  std::set<ImplicitAnimationObserver*> observers_;
47
48  DISALLOW_COPY_AND_ASSIGN(ScopedLayerAnimationSettings);
49};
50
51}  // namespace ui
52
53#endif  // UI_COMPOSITOR_SCOPED_LAYER_ANIMATION_SETTINGS_H_
54