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// Copyright (c) 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.
#ifndef UI_COMPOSITOR_SCOPED_LAYER_ANIMATION_SETTINGS_H_
#define UI_COMPOSITOR_SCOPED_LAYER_ANIMATION_SETTINGS_H_
#include <set>
#include "base/macros.h"
#include "base/time/time.h"
#include "ui/compositor/compositor_export.h"
#include "ui/compositor/layer_animator.h"
#include "ui/gfx/animation/tween.h"
namespace ui {
class ImplicitAnimationObserver;
// Scoped settings allow you to temporarily change the animator's settings and
// these changes are reverted when the object is destroyed. NOTE: when the
// settings object is created, it applies the default transition duration
// (200ms).
class COMPOSITOR_EXPORT ScopedLayerAnimationSettings {
public:
explicit ScopedLayerAnimationSettings(scoped_refptr<LayerAnimator> animator);
virtual ~ScopedLayerAnimationSettings();
void AddObserver(ImplicitAnimationObserver* observer);
void SetTransitionDuration(base::TimeDelta duration);
base::TimeDelta GetTransitionDuration() const;
// Locks transition duration in |animator_|. When transition duration
// is locked any subsequent changes to it are ignored until the
// ScopedLayerAnimationSettings object that has locked the duration goes out
// of scope.
void LockTransitionDuration();
void SetTweenType(gfx::Tween::Type tween_type);
gfx::Tween::Type GetTweenType() const;
void SetPreemptionStrategy(LayerAnimator::PreemptionStrategy strategy);
LayerAnimator::PreemptionStrategy GetPreemptionStrategy() const;
private:
scoped_refptr<LayerAnimator> animator_;
bool old_is_transition_duration_locked_;
base::TimeDelta old_transition_duration_;
gfx::Tween::Type old_tween_type_;
LayerAnimator::PreemptionStrategy old_preemption_strategy_;
std::set<ImplicitAnimationObserver*> observers_;
DISALLOW_COPY_AND_ASSIGN(ScopedLayerAnimationSettings);
};
} // namespace ui
#endif // UI_COMPOSITOR_SCOPED_LAYER_ANIMATION_SETTINGS_H_
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