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_PATTERN_CUSTOM_PAINT_CANVAS_EVENT_HUB_H
17 #define FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERN_CUSTOM_PAINT_CANVAS_EVENT_HUB_H
18 
19 #include "core/components_ng/event/event_hub.h"
20 
21 namespace OHOS::Ace::NG {
22 using ReadyEvent = std::function<void()>;
23 
24 class CanvasEventHub : public EventHub {
25     DECLARE_ACE_TYPE(CanvasEventHub, EventHub)
26 
27 public:
28     CanvasEventHub() = default;
29     ~CanvasEventHub() override = default;
30 
SetOnReady(ReadyEvent && readyEvent)31     void SetOnReady(ReadyEvent&& readyEvent)
32     {
33         readyEvent_ = std::move(readyEvent);
34     }
35 
FireReadyEvent()36     void FireReadyEvent() const
37     {
38         ACE_SCOPED_TRACE("CanvasEventHub::FireReadyEvent");
39         if (readyEvent_) {
40             readyEvent_();
41         }
42     }
43 
44 private:
45     ReadyEvent readyEvent_;
46 };
47 } // namespace OHOS::Ace::NG
48 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERN_CUSTOM_PAINT_CANVAS_EVENT_HUB_H
49