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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 UI_BASE_ANIMATION_THROB_ANIMATION_H_ | |
6 #define UI_BASE_ANIMATION_THROB_ANIMATION_H_ | |
7 | |
8 #include "ui/base/animation/slide_animation.h" | |
9 | |
10 namespace ui { | |
11 | |
12 // A subclass of SlideAnimation that can continually slide. All of the Animation | |
13 // methods behave like that of SlideAnimation: transition to the next state. | |
14 // The StartThrobbing method causes the ThrobAnimation to cycle between hidden | |
15 // and shown for a set number of cycles. | |
16 // | |
17 // A ThrobAnimation has two durations: the duration used when behavior like | |
18 // a SlideAnimation, and the duration used when throbbing. | |
19 class UI_EXPORT ThrobAnimation : public SlideAnimation { | |
20 public: | |
21 explicit ThrobAnimation(AnimationDelegate* target); | |
22 virtual ~ThrobAnimation() {} | |
23 | |
24 // Starts throbbing. cycles_til_stop gives the number of cycles to do before | |
25 // stopping. A negative value means "throb indefinitely". | |
26 void StartThrobbing(int cycles_til_stop); | |
27 | |
28 // Sets the duration of the slide animation when throbbing. | |
29 void SetThrobDuration(int duration) { throb_duration_ = duration; } | |
30 | |
31 // Overridden to reset to the slide duration. | |
32 virtual void Reset() OVERRIDE; | |
33 virtual void Reset(double value) OVERRIDE; | |
34 virtual void Show() OVERRIDE; | |
35 virtual void Hide() OVERRIDE; | |
36 | |
37 // Overridden to maintain the slide duration. | |
38 virtual void SetSlideDuration(int duration) OVERRIDE; | |
39 | |
40 // The number of cycles remaining until the animation stops. | |
41 void set_cycles_remaining(int value) { cycles_remaining_ = value; } | |
42 int cycles_remaining() const { return cycles_remaining_; } | |
43 | |
44 protected: | |
45 // Overriden to continually throb (assuming we're throbbing). | |
46 virtual void Step(base::TimeTicks time_now) OVERRIDE; | |
47 | |
48 private: | |
49 // Resets state such that we behave like SlideAnimation. | |
50 void ResetForSlide(); | |
51 | |
52 // Duration of the slide animation. | |
53 int slide_duration_; | |
54 | |
55 // Duration of the slide animation when throbbing. | |
56 int throb_duration_; | |
57 | |
58 // If throbbing, this is the number of cycles left. | |
59 int cycles_remaining_; | |
60 | |
61 // Are we throbbing? | |
62 bool throbbing_; | |
63 | |
64 DISALLOW_COPY_AND_ASSIGN(ThrobAnimation); | |
65 }; | |
66 | |
67 } // namespace ui | |
68 | |
69 #endif // UI_BASE_ANIMATION_THROB_ANIMATION_H_ | |
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