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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef UI_BASE_ANIMATION_LINEAR_ANIMATION_H_ | 5 #ifndef UI_BASE_ANIMATION_LINEAR_ANIMATION_H_ |
| 6 #define UI_BASE_ANIMATION_LINEAR_ANIMATION_H_ | 6 #define UI_BASE_ANIMATION_LINEAR_ANIMATION_H_ |
| 7 #pragma once | 7 #pragma once |
| 8 | 8 |
| 9 #include "base/time.h" | 9 #include "base/time.h" |
| 10 #include "ui/base/animation/animation.h" | 10 #include "ui/base/animation/animation.h" |
| (...skipping 13 matching lines...) Expand all Loading... |
| 24 // duration can change between calls to Start() and we need to | 24 // duration can change between calls to Start() and we need to |
| 25 // expose this interface. | 25 // expose this interface. |
| 26 LinearAnimation(int frame_rate, AnimationDelegate* delegate); | 26 LinearAnimation(int frame_rate, AnimationDelegate* delegate); |
| 27 | 27 |
| 28 // Initializes all fields. | 28 // Initializes all fields. |
| 29 LinearAnimation(int duration, int frame_rate, AnimationDelegate* delegate); | 29 LinearAnimation(int duration, int frame_rate, AnimationDelegate* delegate); |
| 30 | 30 |
| 31 // Gets the value for the current state, according to the animation curve in | 31 // Gets the value for the current state, according to the animation curve in |
| 32 // use. This class provides only for a linear relationship, however subclasses | 32 // use. This class provides only for a linear relationship, however subclasses |
| 33 // can override this to provide others. | 33 // can override this to provide others. |
| 34 virtual double GetCurrentValue() const; | 34 virtual double GetCurrentValue() const OVERRIDE; |
| 35 | 35 |
| 36 // Skip to the end of the current animation. | 36 // Skip to the end of the current animation. |
| 37 void End(); | 37 void End(); |
| 38 | 38 |
| 39 // Changes the length of the animation. This resets the current | 39 // Changes the length of the animation. This resets the current |
| 40 // state of the animation to the beginning. | 40 // state of the animation to the beginning. |
| 41 void SetDuration(int duration); | 41 void SetDuration(int duration); |
| 42 | 42 |
| 43 protected: | 43 protected: |
| 44 // Called when the animation progresses. Subclasses override this to | 44 // Called when the animation progresses. Subclasses override this to |
| 45 // efficiently update their state. | 45 // efficiently update their state. |
| 46 virtual void AnimateToState(double state) = 0; | 46 virtual void AnimateToState(double state) = 0; |
| 47 | 47 |
| 48 // Invoked by the AnimationContainer when the animation is running to advance | 48 // Invoked by the AnimationContainer when the animation is running to advance |
| 49 // the animation. Use |time_now| rather than Time::Now to avoid multiple | 49 // the animation. Use |time_now| rather than Time::Now to avoid multiple |
| 50 // animations running at the same time diverging. | 50 // animations running at the same time diverging. |
| 51 virtual void Step(base::TimeTicks time_now); | 51 virtual void Step(base::TimeTicks time_now) OVERRIDE; |
| 52 | 52 |
| 53 // Overriden to advance to the end (if End was invoked). | 53 // Overriden to advance to the end (if End was invoked). |
| 54 virtual void AnimationStopped(); | 54 virtual void AnimationStopped() OVERRIDE; |
| 55 | 55 |
| 56 // Overriden to return true if state is not 1. | 56 // Overriden to return true if state is not 1. |
| 57 virtual bool ShouldSendCanceledFromStop(); | 57 virtual bool ShouldSendCanceledFromStop() OVERRIDE; |
| 58 | 58 |
| 59 private: | 59 private: |
| 60 base::TimeDelta duration_; | 60 base::TimeDelta duration_; |
| 61 | 61 |
| 62 // Current state, on a scale from 0.0 to 1.0. | 62 // Current state, on a scale from 0.0 to 1.0. |
| 63 double state_; | 63 double state_; |
| 64 | 64 |
| 65 // If true, we're in end. This is used to determine if the animation should | 65 // If true, we're in end. This is used to determine if the animation should |
| 66 // be advanced to the end from AnimationStopped. | 66 // be advanced to the end from AnimationStopped. |
| 67 bool in_end_; | 67 bool in_end_; |
| 68 | 68 |
| 69 DISALLOW_COPY_AND_ASSIGN(LinearAnimation); | 69 DISALLOW_COPY_AND_ASSIGN(LinearAnimation); |
| 70 }; | 70 }; |
| 71 | 71 |
| 72 } // namespace ui | 72 } // namespace ui |
| 73 | 73 |
| 74 #endif // APP_LINEAR_ANIMATION_H_ | 74 #endif // APP_LINEAR_ANIMATION_H_ |
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