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_NAVROUTER_NAVROUTER_EVENT_HUB_H
17 #define FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERNS_NAVROUTER_NAVROUTER_EVENT_HUB_H
18 
19 #include "base/memory/ace_type.h"
20 #include "core/components_ng/event/event_hub.h"
21 #include "core/components_ng/event/gesture_event_hub.h"
22 
23 namespace OHOS::Ace::NG {
24 
25 using OnStateChangeEvent = std::function<void(bool)>;
26 using OnDestinationChangeEvent = std::function<void()>;
27 
28 class NavRouterEventHub : public EventHub {
DECLARE_ACE_TYPE(NavRouterEventHub,EventHub)29     DECLARE_ACE_TYPE(NavRouterEventHub, EventHub)
30 public:
31     void SetOnStateChange(OnStateChangeEvent&& changeEvent)
32     {
33         onStateChangeEvent_ = changeEvent;
34     }
35 
GetOnStateChange()36     const OnStateChangeEvent& GetOnStateChange()
37     {
38         return onStateChangeEvent_;
39     }
40 
FireChangeEvent(bool isActivated)41     void FireChangeEvent(bool isActivated) const
42     {
43         if (onStateChangeEvent_) {
44             onStateChangeEvent_(isActivated);
45         }
46     }
47 
SetOnDestinationChange(OnDestinationChangeEvent && onDestinationChangeEvent)48     void SetOnDestinationChange(OnDestinationChangeEvent&& onDestinationChangeEvent)
49     {
50         onDestinationChangeEvent_ = onDestinationChangeEvent;
51     }
52 
FireDestinationChangeEvent()53     void FireDestinationChangeEvent() const
54     {
55         if (onDestinationChangeEvent_) {
56             onDestinationChangeEvent_();
57         }
58     }
59 
60 private:
61     OnStateChangeEvent onStateChangeEvent_;
62     OnDestinationChangeEvent onDestinationChangeEvent_;
63 };
64 
65 } // namespace OHOS::Ace::NG
66 
67 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERNS_NAVROUTER_NAVROUTER_EVENT_HUB_H
68