1 /* 2 * Copyright (c) 2022 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERNS_SWIPER_SWIPER_EVENT_HUB_H 17 #define FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERNS_SWIPER_SWIPER_EVENT_HUB_H 18 19 #include <algorithm> 20 #include <memory> 21 22 #include "base/memory/ace_type.h" 23 #include "core/components_ng/event/event_hub.h" 24 #include "core/components_ng/pattern/swiper/swiper_model.h" 25 26 namespace OHOS::Ace::NG { 27 28 enum class Direction { 29 PRE = 0, 30 NEXT, 31 }; 32 using ChangeIndicatorEvent = std::function<void()>; 33 using ChangeEvent = std::function<void(int32_t index)>; 34 using ChangeEventPtr = std::shared_ptr<ChangeEvent>; 35 using ChangeDoneEvent = std::function<void()>; 36 37 class SwiperEventHub : public EventHub { 38 DECLARE_ACE_TYPE(SwiperEventHub, EventHub) 39 40 public: 41 SwiperEventHub() = default; 42 ~SwiperEventHub() override = default; 43 44 /* Using shared_ptr to enable event modification without adding again */ AddOnChangeEvent(const ChangeEventPtr & changeEvent)45 void AddOnChangeEvent(const ChangeEventPtr& changeEvent) 46 { 47 changeEvents_.emplace_back(changeEvent); 48 } 49 SetIndicatorOnChange(ChangeIndicatorEvent && changeEvent)50 void SetIndicatorOnChange(ChangeIndicatorEvent&& changeEvent) 51 { 52 changeIndicatorEvent_ = std::move(changeEvent); 53 } 54 SetChangeDoneEvent(ChangeDoneEvent && changeDoneEvent)55 void SetChangeDoneEvent(ChangeDoneEvent&& changeDoneEvent) 56 { 57 changeDoneEvent_ = std::move(changeDoneEvent); 58 } 59 SetAnimationStartEvent(AnimationStartEvent && animationStartEvent)60 void SetAnimationStartEvent(AnimationStartEvent&& animationStartEvent) 61 { 62 animationStartEvent_ = std::move(animationStartEvent); 63 } 64 SetAnimationEndEvent(AnimationEndEvent && animationEndEvent)65 void SetAnimationEndEvent(AnimationEndEvent&& animationEndEvent) 66 { 67 animationEndEvent_ = std::move(animationEndEvent); 68 } 69 SetGestureSwipeEvent(GestureSwipeEvent && gestureSwipeEvent)70 void SetGestureSwipeEvent(GestureSwipeEvent&& gestureSwipeEvent) 71 { 72 gestureSwipeEvent_ = std::move(gestureSwipeEvent); 73 } 74 FireChangeDoneEvent(bool direction)75 void FireChangeDoneEvent(bool direction) 76 { 77 if (changeDoneEvent_) { 78 if (direction) { 79 direction_ = Direction::NEXT; 80 } else { 81 direction_ = Direction::PRE; 82 } 83 changeDoneEvent_(); 84 } 85 } 86 FireChangeEvent(int32_t index)87 void FireChangeEvent(int32_t index) const 88 { 89 if (!changeEvents_.empty()) { 90 std::for_each( 91 changeEvents_.begin(), changeEvents_.end(), [index](const ChangeEventPtr& event) { (*event)(index); }); 92 } 93 } 94 FireIndicatorChangeEvent(int32_t index)95 void FireIndicatorChangeEvent(int32_t index) const 96 { 97 if (changeIndicatorEvent_) { 98 changeIndicatorEvent_(); 99 } 100 } 101 GetDirection()102 Direction GetDirection() 103 { 104 return direction_; 105 } 106 FireAnimationStartEvent(int32_t index,int32_t targetIndex,const AnimationCallbackInfo & info)107 void FireAnimationStartEvent(int32_t index, int32_t targetIndex, const AnimationCallbackInfo& info) const 108 { 109 if (animationStartEvent_) { 110 animationStartEvent_(index, targetIndex, info); 111 } 112 } 113 FireAnimationEndEvent(int32_t index,const AnimationCallbackInfo & info)114 void FireAnimationEndEvent(int32_t index, const AnimationCallbackInfo& info) const 115 { 116 if (animationEndEvent_) { 117 animationEndEvent_(index, info); 118 } 119 } 120 FireGestureSwipeEvent(int32_t index,const AnimationCallbackInfo & info)121 void FireGestureSwipeEvent(int32_t index, const AnimationCallbackInfo& info) const 122 { 123 if (gestureSwipeEvent_) { 124 gestureSwipeEvent_(index, info); 125 } 126 } 127 128 private: 129 Direction direction_; 130 std::list<ChangeEventPtr> changeEvents_; 131 ChangeDoneEvent changeDoneEvent_; 132 ChangeIndicatorEvent changeIndicatorEvent_; 133 AnimationStartEvent animationStartEvent_; 134 AnimationEndEvent animationEndEvent_; 135 GestureSwipeEvent gestureSwipeEvent_; 136 }; 137 138 } // namespace OHOS::Ace::NG 139 140 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERNS_SWIPER_SWIPER_EVENT_HUB_H