scoped_layer_animation_settings.h revision d0247b1b59f9c528cb6df88b4f2b9afaf80d181e
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 17namespace ui { 18 19class ImplicitAnimationObserver; 20class LayerAnimationObserver; 21class 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). 27class COMPOSITOR_EXPORT ScopedLayerAnimationSettings { 28 public: 29 explicit ScopedLayerAnimationSettings(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 void SetTweenType(gfx::Tween::Type tween_type); 38 gfx::Tween::Type GetTweenType() const; 39 40 void SetPreemptionStrategy(LayerAnimator::PreemptionStrategy strategy); 41 LayerAnimator::PreemptionStrategy GetPreemptionStrategy() const; 42 43 // Sets the base layer whose animation will be countered. 44 void SetInverselyAnimatedBaseLayer(Layer* base); 45 46 // Adds the layer to be counter-animated when a transform animation is 47 // scheduled on the animator_. Must call SetInverselyAnimatedBaseLayer with 48 // the layer associated with animator_ before animating. 49 void AddInverselyAnimatedLayer(Layer* inverse_layer); 50 51 private: 52 LayerAnimator* animator_; 53 base::TimeDelta old_transition_duration_; 54 gfx::Tween::Type old_tween_type_; 55 LayerAnimator::PreemptionStrategy old_preemption_strategy_; 56 std::set<ImplicitAnimationObserver*> observers_; 57 scoped_ptr<InvertingObserver> inverse_observer_; 58 59 DISALLOW_COPY_AND_ASSIGN(ScopedLayerAnimationSettings); 60}; 61 62} // namespace ui 63 64#endif // UI_COMPOSITOR_SCOPED_LAYER_ANIMATION_SETTINGS_H_ 65