1 /*
2  * Copyright (c) 2024 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_NODE_CONTAINER_EVENT_HUB_H
17 #define FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERNS_NODE_CONTAINER_EVENT_HUB_H
18 
19 #include <utility>
20 #include "core/components_ng/event/event_hub.h"
21 
22 namespace OHOS::Ace::NG {
23 
24 class NodeContainerEventHub : public EventHub {
DECLARE_ACE_TYPE(NodeContainerEventHub,EventHub)25     DECLARE_ACE_TYPE(NodeContainerEventHub, EventHub)
26 public:
27     void SetControllerAboutToAppear(std::function<void()>&& onAppearCallback)
28     {
29         onAppearCallback_ = std::move(onAppearCallback);
30     }
31 
SetControllerAboutToDisappear(std::function<void ()> && onDisAppearCallback)32     void SetControllerAboutToDisappear(std::function<void()>&& onDisAppearCallback)
33     {
34         onDisAppearCallback_ = std::move(onDisAppearCallback);
35     }
36 
37     void FireOnAppear() override;
38 
39     void FireOnDisappear() override;
40 
41 private:
42     std::function<void()> onAppearCallback_;
43     std::function<void()> onDisAppearCallback_;
44 };
45 
46 } // namespace OHOS::Ace::NG
47 
48 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERNS_NODE_CONTAINER_EVENT_HUB_H
49