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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/ref_counted.h" | |
13 #include "base/memory/scoped_ptr.h" | |
14 #include "ui/base/animation/animation_delegate.h" | |
15 #include "ui/gfx/image/image_skia.h" | |
16 | |
17 namespace gfx { | |
18 class Canvas; | |
19 class Rect; | |
20 } | |
21 namespace ui { | |
22 class Animation; | |
23 class AnimationContainer; | |
24 class LinearAnimation; | |
25 } | |
26 | |
27 // This class is used to draw an animating tab audio indicator. | |
28 class TabAudioIndicator : public ui::AnimationDelegate { | |
29 public: | |
30 class Delegate { | |
31 public: | |
32 virtual void ScheduleAudioIndicatorPaint() = 0; | |
33 | |
34 protected: | |
35 virtual ~Delegate() {} | |
36 }; | |
37 | |
38 explicit TabAudioIndicator(Delegate* delegate); | |
39 virtual ~TabAudioIndicator(); | |
40 | |
41 void set_favicon(const gfx::ImageSkia& favicon) { favicon_ = favicon; } | |
42 | |
43 void SetAnimationContainer(ui::AnimationContainer* animation_container); | |
44 void SetIsPlayingAudio(bool is_playing_audio); | |
45 bool IsAnimating(); | |
46 | |
47 void Paint(gfx::Canvas* canvas, const gfx::Rect& rect); | |
48 | |
49 private: | |
50 enum State { | |
51 STATE_NOT_ANIMATING, | |
52 STATE_ANIMATING, | |
53 STATE_ANIMATION_ENDING, | |
54 }; | |
55 | |
56 FRIEND_TEST_ALL_PREFIXES(TabAudioIndicatorTest, AnimationState); | |
57 FRIEND_TEST_ALL_PREFIXES(TabAudioIndicatorTest, SchedulePaint); | |
58 | |
59 // AnimationDelegate: | |
60 virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE; | |
61 virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE; | |
62 | |
63 // Gets the equalizer levels for all 3 columns. The values are tweened between | |
64 // the current and target frame. | |
65 std::vector<int> GetCurrentEqualizerLevels() const; | |
66 | |
67 Delegate* delegate_; | |
68 scoped_ptr<ui::LinearAnimation> animation_; | |
69 scoped_refptr<ui::AnimationContainer> animation_container_; | |
70 gfx::ImageSkia favicon_; | |
71 | |
72 // The equalizer frame that's currently being displayed. | |
73 size_t frame_index_; | |
74 | |
75 // The equalizer levels that were last displayed. This is used to prevent | |
76 // unnecessary drawing when animation progress doesn't result in equalizer | |
77 // levels changing. | |
78 std::vector<int> last_displayed_equalizer_levels_; | |
79 | |
80 State state_; | |
81 | |
82 DISALLOW_COPY_AND_ASSIGN(TabAudioIndicator); | |
83 }; | |
84 | |
85 #endif // CHROME_BROWSER_UI_TABS_TAB_AUDIO_INDICATOR_H_ | |
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