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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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