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| 1 // Copyright 2015 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_VIEWS_ANIMATION_INK_DROP_HOVER_H_ | |
| 6 #define UI_VIEWS_ANIMATION_INK_DROP_HOVER_H_ | |
| 7 | |
| 8 #include <iosfwd> | |
| 9 #include <memory> | |
| 10 | |
| 11 #include "base/macros.h" | |
| 12 #include "base/time/time.h" | |
| 13 #include "third_party/skia/include/core/SkColor.h" | |
| 14 #include "ui/gfx/geometry/point.h" | |
| 15 #include "ui/gfx/geometry/point_f.h" | |
| 16 #include "ui/gfx/geometry/size.h" | |
| 17 #include "ui/gfx/transform.h" | |
| 18 #include "ui/views/views_export.h" | |
| 19 | |
| 20 namespace ui { | |
| 21 class Layer; | |
| 22 class CallbackLayerAnimationObserver; | |
| 23 } // namespace ui | |
| 24 | |
| 25 namespace views { | |
| 26 namespace test { | |
| 27 class InkDropHoverTestApi; | |
| 28 } // namespace test | |
| 29 | |
| 30 class RoundedRectangleLayerDelegate; | |
| 31 class InkDropHoverObserver; | |
| 32 | |
| 33 // Manages fade in/out animations for a painted Layer that is used to provide | |
| 34 // visual feedback on ui::Views for mouse hover states. | |
| 35 class VIEWS_EXPORT InkDropHover { | |
| 36 public: | |
| 37 enum AnimationType { FADE_IN, FADE_OUT }; | |
| 38 | |
| 39 InkDropHover(const gfx::Size& size, | |
| 40 int corner_radius, | |
| 41 const gfx::Point& center_point, | |
| 42 SkColor color); | |
| 43 virtual ~InkDropHover(); | |
| 44 | |
| 45 void set_observer(InkDropHoverObserver* observer) { observer_ = observer; } | |
| 46 | |
| 47 void set_explode_size(const gfx::Size& size) { explode_size_ = size; } | |
| 48 | |
| 49 // Returns true if the hover animation is either in the process of fading | |
| 50 // in or is fully visible. | |
| 51 bool IsFadingInOrVisible() const; | |
| 52 | |
| 53 // Fades in the hover visual over the given |duration|. | |
| 54 void FadeIn(const base::TimeDelta& duration); | |
| 55 | |
| 56 // Fades out the hover visual over the given |duration|. If |explode| is true | |
| 57 // then the hover will animate a size increase in addition to the fade out. | |
| 58 void FadeOut(const base::TimeDelta& duration, bool explode); | |
| 59 | |
| 60 // The root Layer that can be added in to a Layer tree. | |
| 61 ui::Layer* layer() { return layer_.get(); } | |
| 62 | |
| 63 // Returns a test api to access internals of this. Default implmentations | |
| 64 // should return nullptr and test specific subclasses can override to return | |
| 65 // an instance. | |
| 66 virtual test::InkDropHoverTestApi* GetTestApi(); | |
| 67 | |
| 68 private: | |
| 69 friend class test::InkDropHoverTestApi; | |
| 70 | |
| 71 // Animates a fade in/out as specified by |animation_type| combined with a | |
| 72 // transformation from the |initial_size| to the |target_size| over the given | |
| 73 // |duration|. | |
| 74 void AnimateFade(AnimationType animation_type, | |
| 75 const base::TimeDelta& duration, | |
| 76 const gfx::Size& initial_size, | |
| 77 const gfx::Size& target_size); | |
| 78 | |
| 79 // Calculates the Transform to apply to |layer_| for the given |size|. | |
| 80 gfx::Transform CalculateTransform(const gfx::Size& size) const; | |
| 81 | |
| 82 // The callback that will be invoked when a fade in/out animation is started. | |
| 83 void AnimationStartedCallback( | |
| 84 AnimationType animation_type, | |
| 85 const ui::CallbackLayerAnimationObserver& observer); | |
| 86 | |
| 87 // The callback that will be invoked when a fade in/out animation is complete. | |
| 88 bool AnimationEndedCallback( | |
| 89 AnimationType animation_type, | |
| 90 const ui::CallbackLayerAnimationObserver& observer); | |
| 91 | |
| 92 // The size of the hover shape when fully faded in. | |
| 93 gfx::Size size_; | |
| 94 | |
| 95 // The target size of the hover shape when it expands during a fade out | |
| 96 // animation. | |
| 97 gfx::Size explode_size_; | |
| 98 | |
| 99 // The center point of the hover shape in the parent Layer's coordinate space. | |
| 100 gfx::PointF center_point_; | |
| 101 | |
| 102 // True if the last animation to be initiated was a FADE_IN, and false | |
| 103 // otherwise. | |
| 104 bool last_animation_initiated_was_fade_in_; | |
| 105 | |
| 106 // The LayerDelegate that paints the hover |layer_|. | |
| 107 std::unique_ptr<RoundedRectangleLayerDelegate> layer_delegate_; | |
| 108 | |
| 109 // The visual hover layer that is painted by |layer_delegate_|. | |
| 110 std::unique_ptr<ui::Layer> layer_; | |
| 111 | |
| 112 InkDropHoverObserver* observer_; | |
| 113 | |
| 114 DISALLOW_COPY_AND_ASSIGN(InkDropHover); | |
| 115 }; | |
| 116 | |
| 117 // Returns a human readable string for |animation_type|. Useful for logging. | |
| 118 VIEWS_EXPORT std::string ToString(InkDropHover::AnimationType animation_type); | |
| 119 | |
| 120 // This is declared here for use in gtest-based unit tests but is defined in | |
| 121 // the views_test_support target. Depend on that to use this in your unit test. | |
| 122 // This should not be used in production code - call ToString() instead. | |
| 123 void PrintTo(InkDropHover::AnimationType animation_type, ::std::ostream* os); | |
| 124 | |
| 125 } // namespace views | |
| 126 | |
| 127 #endif // UI_VIEWS_ANIMATION_INK_DROP_HOVER_H_ | |
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