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/memory/scoped_vector.h" 11 #include "base/time/time.h" 12 13 #include "ui/compositor/compositor_export.h" 14 #include "ui/compositor/layer_animator.h" 15 #include "ui/gfx/animation/tween.h" 16 17 namespace ui { 18 19 class ImplicitAnimationObserver; 20 class LayerAnimationObserver; 21 class InvertingObserver; 22 23 // Scoped settings allow you to temporarily change the animator's settings and 24 // these changes are reverted when the object is destroyed. NOTE: when the 25 // settings object is created, it applies the default transition duration 26 // (200ms). 27 class COMPOSITOR_EXPORT ScopedLayerAnimationSettings { 28 public: 29 explicit ScopedLayerAnimationSettings(scoped_refptr<LayerAnimator> animator); 30 virtual ~ScopedLayerAnimationSettings(); 31 32 void AddObserver(ImplicitAnimationObserver* observer); 33 34 void SetTransitionDuration(base::TimeDelta duration); 35 base::TimeDelta GetTransitionDuration() const; 36 37 // Locks transition duration in |animator_|. When transition duration 38 // is locked any subsequent changes to it are ignored until the 39 // ScopedLayerAnimationSettings object that has locked the duration goes out 40 // of scope. 41 void LockTransitionDuration(); 42 43 void SetTweenType(gfx::Tween::Type tween_type); 44 gfx::Tween::Type GetTweenType() const; 45 46 void SetPreemptionStrategy(LayerAnimator::PreemptionStrategy strategy); 47 LayerAnimator::PreemptionStrategy GetPreemptionStrategy() const; 48 49 // Sets the base layer whose animation will be countered. 50 void SetInverselyAnimatedBaseLayer(Layer* base); 51 52 // Adds the layer to be counter-animated when a transform animation is 53 // scheduled on the animator_. Must call SetInverselyAnimatedBaseLayer with 54 // the layer associated with animator_ before animating. 55 void AddInverselyAnimatedLayer(Layer* inverse_layer); 56 57 private: 58 scoped_refptr<LayerAnimator> animator_; 59 bool old_is_transition_duration_locked_; 60 base::TimeDelta old_transition_duration_; 61 gfx::Tween::Type old_tween_type_; 62 LayerAnimator::PreemptionStrategy old_preemption_strategy_; 63 std::set<ImplicitAnimationObserver*> observers_; 64 scoped_ptr<InvertingObserver> inverse_observer_; 65 66 DISALLOW_COPY_AND_ASSIGN(ScopedLayerAnimationSettings); 67 }; 68 69 } // namespace ui 70 71 #endif // UI_COMPOSITOR_SCOPED_LAYER_ANIMATION_SETTINGS_H_ 72