ash/rotator/window_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_WINDOW_ROTATION_H_
   6 #define ASH_WINDOW_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/geometry/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 window rotation represents a single transition from one window 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 WindowRotation : public ui::LayerAnimationElement {
  30  public:
  31   // |degrees| are clockwise. |layer| is the target of the animation. Does not
  32   // take ownership of |layer|.
  33   WindowRotation(int degrees, ui::Layer* layer);
  34   ~WindowRotation() override;
  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   void OnStart(ui::LayerAnimationDelegate* delegate) override;
  43   bool OnProgress(double t, ui::LayerAnimationDelegate* delegate) override;
  44   void OnGetTarget(TargetValue* target) const override;
  45   void OnAbort(ui::LayerAnimationDelegate* delegate) override;
  46
  47   scoped_ptr<ui::InterpolatedTransform> interpolated_transform_;
  48
  49   // The number of degrees to rotate.
  50   int degrees_;
  51
  52   // The target origin.
  53   gfx::Point new_origin_;
  54
  55   DISALLOW_COPY_AND_ASSIGN(WindowRotation);
  56 };
  57
  58 }  // namespace ash
  59
  60 #endif  // ASH_WINDOW_ROTATION_H_