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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_SCREEN_ROTATION_H_
#define UI_COMPOSITOR_SCREEN_ROTATION_H_
#pragma once
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "ui/base/animation/animation_delegate.h"
#include "ui/compositor/compositor_export.h"
#include "ui/compositor/layer_animation_element.h"
#include "ui/gfx/point.h"
namespace ui {
class InterpolatedTransform;
class LayerAnimationDelegate;
// A screen rotation represents a single transition from one screen orientation
// to another. The intended usage is that a new instance of the class is
// created for every transition. It is possible to update the target orientation
// in the middle of a transition.
class COMPOSITOR_EXPORT ScreenRotation : public LayerAnimationElement {
public:
// The screen rotation does not own the view or the listener, and these
// objects are required to outlive the Screen rotation object.
ScreenRotation(int degrees);
virtual ~ScreenRotation();
private:
// Implementation of LayerAnimationDelegate
virtual void OnStart(LayerAnimationDelegate* delegate) OVERRIDE;
virtual bool OnProgress(double t,
LayerAnimationDelegate* delegate) OVERRIDE;
virtual void OnGetTarget(TargetValue* target) const OVERRIDE;
virtual void OnAbort() OVERRIDE;
static const LayerAnimationElement::AnimatableProperties& GetProperties();
// Generates the intermediate transformation matrices used during the
// animation.
scoped_ptr<InterpolatedTransform> interpolated_transform_;
// The number of degrees to rotate.
int degrees_;
// The target origin
gfx::Point new_origin_;
DISALLOW_COPY_AND_ASSIGN(ScreenRotation);
};
} // namespace ui
#endif // UI_COMPOSITOR_SCREEN_ROTATION_H_
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