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_PATTERNS_SWITCH_SWITCH_EVENT_HUB_H 17 #define FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERNS_SWITCH_SWITCH_EVENT_HUB_H 18 19 #include "base/memory/ace_type.h" 20 #include "base/utils/noncopyable.h" 21 #include "core/components_ng/event/event_hub.h" 22 23 namespace OHOS::Ace::NG { 24 25 using ChangeEvent = std::function<void(const bool)>; 26 27 class SwitchEventHub : public EventHub { 28 DECLARE_ACE_TYPE(SwitchEventHub, EventHub) 29 30 public: 31 SwitchEventHub() = default; 32 ~SwitchEventHub() override = default; 33 SetOnChange(ChangeEvent && changeEvent)34 void SetOnChange(ChangeEvent&& changeEvent) 35 { 36 changeEvent_ = std::move(changeEvent); 37 } 38 UpdateChangeEvent(bool isOn)39 void UpdateChangeEvent(bool isOn) const 40 { 41 auto task = [changeEvent = changeEvent_, isOn]() { 42 if (changeEvent) { 43 changeEvent(isOn); 44 } 45 }; 46 auto context = PipelineBase::GetCurrentContext(); 47 CHECK_NULL_VOID(context); 48 context->PostAsyncEvent(task, TaskExecutor::TaskType::UI); 49 } 50 51 private: 52 ChangeEvent changeEvent_; 53 54 ACE_DISALLOW_COPY_AND_MOVE(SwitchEventHub); 55 }; 56 } // namespace OHOS::Ace::NG 57 58 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERNS_SWITCH_SWITCH_EVENT_HUB_H