1 /* 2 * Copyright (c) 2021 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 #ifndef FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_BASE_RELATED_NODE_H 16 #define FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_BASE_RELATED_NODE_H 17 18 #include "base/geometry/offset.h" 19 #include "base/memory/ace_type.h" 20 21 namespace OHOS::Ace { 22 23 class RenderNode; 24 class RelatedContainer : public virtual AceType { 25 DECLARE_ACE_TYPE(RelatedContainer, AceType); 26 27 public: OnRelatedStart()28 virtual void OnRelatedStart() {} OnRelatedPreScroll(const Offset & delta,Offset & consumed)29 virtual void OnRelatedPreScroll(const Offset& delta, Offset& consumed) {} OnRelatedScroll(const Offset & delta,Offset & consumed)30 virtual void OnRelatedScroll(const Offset& delta, Offset& consumed) {} OnRelatedEnd()31 virtual void OnRelatedEnd() {} 32 }; 33 34 class RelatedChild { 35 public: 36 void InitRelatedParent(const WeakPtr<RenderNode>& weakParent); IsRelatedEventEnable()37 bool IsRelatedEventEnable() 38 { 39 return enableRelatedEvent_ && relatedParent_.Upgrade(); 40 }; 41 void RelatedEventStart(); 42 bool RelatedScrollEventPrepare(const Offset& delta); 43 bool RelatedScrollEventDoing(const Offset& delta); 44 void RelatedEventEnd(); 45 46 protected: 47 WeakPtr<RelatedContainer> relatedParent_; 48 49 private: 50 bool enableRelatedEvent_ = true; 51 }; 52 53 } // namespace OHOS::Ace 54 55 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_BASE_RELATED_NODE_H 56