1 /*
2  * Copyright (c) 2023 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_WATERFLOW_WATER_FLOW_EVENT_HUB_H
17 #define FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERNS_WATERFLOW_WATER_FLOW_EVENT_HUB_H
18 
19 #include "core/components_ng/pattern/scrollable/scrollable_event_hub.h"
20 
21 namespace OHOS::Ace::NG {
22 using ScrollIndexFunc = std::function<void(int32_t, int32_t)>;
23 
24 class WaterFlowEventHub : public ScrollableEventHub {
DECLARE_ACE_TYPE(WaterFlowEventHub,ScrollableEventHub)25     DECLARE_ACE_TYPE(WaterFlowEventHub, ScrollableEventHub)
26 
27 public:
28     void SetOnScrollIndex(ScrollIndexFunc&& onScrollIndex)
29     {
30         onScrollIndexEvent_ = std::move(onScrollIndex);
31     }
32 
GetOnScrollIndex()33     const ScrollIndexFunc& GetOnScrollIndex() const
34     {
35         return onScrollIndexEvent_;
36     }
37 
38 private:
39     ScrollIndexFunc onScrollIndexEvent_;
40 };
41 } // namespace OHOS::Ace::NG
42 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERNS_WATERFLOW_WATER_FLOW_EVENT_HUB_H