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 GRAPHIC_LITE_UI_TREE_MANAGER_H
17#define GRAPHIC_LITE_UI_TREE_MANAGER_H
18#include "components/ui_view.h"
19#include "gfx_utils/list.h"
20
21namespace OHOS {
22
23class UITreeManager final : public HeapBase {
24public:
25    static UITreeManager &GetInstance();
26
27    enum ViewLifeEvent {
28        ADD,
29        REMOVE
30    };
31    using ViewFunc = void();
32    void RegistViewLifeEvent(ViewFunc* func);
33    void UnregistViewLifeEvent(ViewFunc* func);
34    void GetLastEvent(UIView*& view, ViewLifeEvent& event);
35    void OnLifeEvent(UIView*, ViewLifeEvent);
36
37private:
38    List<ViewFunc*> lifeEvents_;
39    UIView* lastEventView_;
40    ViewLifeEvent lastEvent_;
41};
42} // namespace OHOS
43#endif
44