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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 | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef UI_BASE_ANIMATION_ANIMATION_CONTAINER_ELEMENT_H_ | |
6 #define UI_BASE_ANIMATION_ANIMATION_CONTAINER_ELEMENT_H_ | |
7 | |
8 #include "base/time/time.h" | |
9 #include "ui/base/ui_export.h" | |
10 | |
11 namespace ui { | |
12 | |
13 // Interface for the elements the AnimationContainer contains. This is | |
14 // implemented by Animation. | |
15 class UI_EXPORT AnimationContainerElement { | |
16 public: | |
17 // Sets the start of the animation. This is invoked from | |
18 // AnimationContainer::Start. | |
19 virtual void SetStartTime(base::TimeTicks start_time) = 0; | |
20 | |
21 // Invoked when the animation is to progress. | |
22 virtual void Step(base::TimeTicks time_now) = 0; | |
23 | |
24 // Returns the time interval of the animation. If an Element needs to change | |
25 // this it should first invoke Stop, then Start. | |
26 virtual base::TimeDelta GetTimerInterval() const = 0; | |
27 | |
28 protected: | |
29 virtual ~AnimationContainerElement() {} | |
30 }; | |
31 | |
32 } // namespace ui | |
33 | |
34 #endif // UI_BASE_ANIMATION_ANIMATION_CONTAINER_ELEMENT_H_ | |
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