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 static const ui::LayerAnimationElement::AnimatableProperties& 49 GetProperties(); 50 51 scoped_ptr<ui::InterpolatedTransform> interpolated_transform_; 52 53 // The number of degrees to rotate. 54 int degrees_; 55 56 // The target origin. 57 gfx::Point new_origin_; 58 59 DISALLOW_COPY_AND_ASSIGN(ScreenRotation); 60 }; 61 62 } // namespace ash 63 64 #endif // ASH_SCREEN_ROTATION_H_ 65