Reland r107720 - Enable the new layer animation framework.

chrome/browser/ui/touch/animation/screen_rotation.h

-// Copyright (c) 2011 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 CHROME_BROWSER_UI_TOUCH_ANIMATION_SCREEN_ROTATION_H_
-#define CHROME_BROWSER_UI_TOUCH_ANIMATION_SCREEN_ROTATION_H_
-#pragma once
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/bind.h"
-#include "ui/base/animation/animation_delegate.h"
-#include "ui/gfx/compositor/compositor_observer.h"
-#include "ui/gfx/point.h"
-#include "ui/gfx/size.h"
-
-namespace ui {
-class InterpolatedTransform;
-class Layer;
-class SlideAnimation;
-class Transform;
-}
-
-namespace gfx {
-class Rect;
-}
-
-namespace views {
-class PaintLock;
-class View;
-class Widget;
-}
-
-// Classes that wish to be notified when a screen rotation completes must
-// implement the screen rotation listener interface.
-class ScreenRotationListener {
- public:
-  virtual void OnScreenRotationCompleted(const ui::Transform& target_transform,
-                                         const gfx::Rect& target_bounds) = 0;
- protected:
-  virtual ~ScreenRotationListener();
-};
-
-// 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 ScreenRotation : public ui::AnimationDelegate,
-                       public ui::CompositorObserver {
- public:
-  // The screen rotation does not own the view or the listener, and these
-  // objects are required to outlive the Screen rotation object.
-  ScreenRotation(views::View* view,
-                 ScreenRotationListener* listener,
-                 float old_degrees,
-                 float new_degrees);
-  virtual ~ScreenRotation();
-
-  // Aborts the animation by skipping to the end and applying the final
-  // transform before calling |Finalize|.
-  void Stop();
-
- private:
-  // Implementation of ui::AnimationDelegate
-  virtual void AnimationEnded(const ui::Animation* anim) OVERRIDE;
-  virtual void AnimationProgressed(const ui::Animation* anim) OVERRIDE;
-
-  // Implementation of ui::CompositorObserver
-  void OnCompositingEnded(ui::Compositor* compositor) OVERRIDE;
-
-  // Initializes |interpolated_transform_|, |new_origin_|, |new_size_|, and
-  // (if it has not already been initialized) |old_transform_|
-  void Init();
-
-  // Initializes the screen rotation and starts |animation_|.
-  void Start();
-
-  // Called after the animation is finished and the view has completed painting
-  // in its final state.
-  void Finalize();
-
-  // Converts degrees to an angle in the range [-180, 180).
-  int NormalizeAngle(int degrees);
-
-  // We occasionally need to wait for a paint to finish before progressing.
-  // This function (which is triggered by OnPainted and OnComposited) does
-  // any pending work.
-  void DoPendingWork();
-
-  // This is the view that will be animated. The animation will operate mainly
-  // on |view_|'s layer, but it is used upon completion of the rotation to
-  // update the bounds.
-  views::View* view_;
-
-  // This widget will be used for scheduling paints.
-  views::Widget* widget_;
-
-  // A ScreenRotation may be associated with a listener that is notified when
-  // the screen rotation completes.
-  ScreenRotationListener* listener_;
-
-  // The animation object that instigates stepping of the animation.
-  scoped_ptr<ui::SlideAnimation> animation_;
-
-  // Generates the intermediate transformation matrices used during the
-  // animation.
-  scoped_ptr<ui::InterpolatedTransform> interpolated_transform_;
-
-  // Ensures that the view is not repainted during the screen rotation.
-  scoped_ptr<views::PaintLock> paint_lock_;
-
-  // The original orientation (not updated by |SetTarget|.
-  float old_degrees_;
-
-  // The target orientation.
-  float new_degrees_;
-
-  // The target size for |view_|
-  gfx::Size new_size_;
-
-  // The target origin for |view_|
-  gfx::Point new_origin_;
-
-  // This is the duration of the transition in milliseconds
-  int duration_;
-
-  // These are used by DoPendingWork to decide what needs to be done.
-  bool animation_started_;
-  bool animation_stopped_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScreenRotation);
-};
-
-#endif  // CHROME_BROWSER_UI_TOUCH_ANIMATION_SCREEN_ROTATION_H_