ash/rotator/screen_rotation.h

   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 ASH_SCREEN_ROTATION_H_
   6 #define ASH_SCREEN_ROTATION_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "base/basictypes.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "ui/compositor/layer_animation_element.h"
  12 #include "ui/gfx/point.h"
  13
  14 namespace ui {
  15 class InterpolatedTransform;
  16 class Layer;
  17 }
  18
  19 namespace aura {
  20 class RootWindow;
  21 }
  22
  23 namespace ash {
  24
  25 // A screen rotation represents a single transition from one screen orientation
  26 // to another. The  intended usage is that a new instance of the class is
  27 // created for every transition. It is possible to update the target orientation
  28 // in the middle of a transition.
  29 class ASH_EXPORT ScreenRotation : public ui::LayerAnimationElement {
  30  public:
  31   // |degrees| are clockwise. |layer| is the target of the animation. Does not
  32   // take ownership of |layer|.
  33   ScreenRotation(int degrees, ui::Layer* layer);
  34   virtual ~ScreenRotation();
  35
  36  private:
  37   // Generates the intermediate transformation matrices used during the
  38   // animation.
  39   void InitTransform(ui::Layer* layer);
  40
  41   // Implementation of ui::LayerAnimationDelegate
  42   virtual void OnStart(ui::LayerAnimationDelegate* delegate) OVERRIDE;
  43   virtual bool OnProgress(double t,
  44                           ui::LayerAnimationDelegate* delegate) OVERRIDE;
  45   virtual void OnGetTarget(TargetValue* target) const OVERRIDE;
  46   virtual void OnAbort(ui::LayerAnimationDelegate* delegate) OVERRIDE;
  47
  48   scoped_ptr<ui::InterpolatedTransform> interpolated_transform_;
  49
  50   // The number of degrees to rotate.
  51   int degrees_;
  52
  53   // The target origin.
  54   gfx::Point new_origin_;
  55
  56   DISALLOW_COPY_AND_ASSIGN(ScreenRotation);
  57 };
  58
  59 }  // namespace ash
  60
  61 #endif  // ASH_SCREEN_ROTATION_H_