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1 // Copyright (c) 2013 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 CHROME_BROWSER_UI_TABS_TAB_AUDIO_INDICATOR_H_ | |
6 #define CHROME_BROWSER_UI_TABS_TAB_AUDIO_INDICATOR_H_ | |
7 | |
8 #include <vector> | |
9 | |
10 #include "base/compiler_specific.h" | |
11 #include "base/gtest_prod_util.h" | |
12 #include "base/memory/scoped_ptr.h" | |
13 #include "ui/base/animation/animation_delegate.h" | |
14 | |
15 namespace gfx { | |
16 class Canvas; | |
17 class Rect; | |
18 } | |
19 namespace ui { | |
20 class Animation; | |
21 class LinearAnimation; | |
22 } | |
23 | |
24 // This class is used to draw an animating tab audio indicator. | |
25 class TabAudioIndicator : public ui::AnimationDelegate { | |
26 public: | |
27 class Delegate { | |
28 public: | |
29 virtual void ScheduleAudioIndicatorPaint() = 0; | |
30 }; | |
sky
2013/03/12 03:59:43
protected: virtual ~Delegate() {}
sail
2013/03/12 04:24:33
Done.
| |
31 | |
32 explicit TabAudioIndicator(Delegate* delegate); | |
sky
2013/03/12 03:59:43
Can you make this take an AnimationContainer so th
sail
2013/03/12 04:24:33
Done.
sail
2013/03/12 06:15:58
Actually, had to move this to a setter so that the
| |
33 virtual ~TabAudioIndicator(); | |
34 | |
35 void SetIsPlayingAudio(bool is_playing_audio); | |
36 bool IsAnimating(); | |
37 | |
38 void Paint(gfx::Canvas* canvas, const gfx::Rect& rect); | |
39 | |
40 private: | |
41 FRIEND_TEST_ALL_PREFIXES(TabAudioIndicatorTest, AnimationState); | |
42 FRIEND_TEST_ALL_PREFIXES(TabAudioIndicatorTest, SchedulePaint); | |
43 | |
44 // AnimationDelegate: | |
45 virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE; | |
46 virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE; | |
47 | |
48 // Gets the equalizer levels for all 3 columns. The values are tweened between | |
49 // the current and target frame. | |
50 std::vector<int> GetCurrentEqualizerLevels() const; | |
51 | |
52 Delegate* delegate_; | |
53 scoped_ptr<ui::LinearAnimation> animation_; | |
54 | |
55 // The equalizer frame that's currently being displayed. | |
56 size_t frame_index_; | |
57 | |
58 // The equalizer levels that were last displayed. This is used to prevent | |
59 // unnecessary drawing when animation progress doesn't result in equalizer | |
60 // levels changing. | |
61 std::vector<int> last_displayed_equalizer_levels_; | |
62 | |
63 enum State { | |
sky
2013/03/12 03:59:43
enums should be first in a section.
sail
2013/03/12 04:24:33
Done.
| |
64 STATE_NOT_ANIMATING, | |
65 STATE_ANIMATING, | |
66 STATE_ANIMATION_ENDING, | |
67 }; | |
68 State state_; | |
69 | |
70 DISALLOW_COPY_AND_ASSIGN(TabAudioIndicator); | |
71 }; | |
72 | |
73 #endif // CHROME_BROWSER_UI_TABS_TAB_AUDIO_INDICATOR_H_ | |
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