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_REFRESH_EVENT_HUB_H
17 #define FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERNS_REFRESH_EVENT_HUB_H
18 
19 #include "frameworks/base/memory/ace_type.h"
20 #include "frameworks/core/components_ng/event/event_hub.h"
21 
22 namespace OHOS::Ace::NG {
23 
24 using StateChangeEvent = std::function<void(const int32_t)>;
25 using RefreshChangeEvent = std::function<void(const std::string)>;
26 using RefreshingEvent = std::function<void()>;
27 using OffsetChangeEvent = std::function<void(const float)>;
28 
29 class RefreshEventHub : public EventHub {
30     DECLARE_ACE_TYPE(RefreshEventHub, EventHub)
31 
32 public:
33     RefreshEventHub() = default;
34     ~RefreshEventHub() override = default;
35 
SetOnStateChange(StateChangeEvent && stateChange)36     void SetOnStateChange(StateChangeEvent&& stateChange)
37     {
38         stateChange_ = std::move(stateChange);
39     }
40 
FireOnStateChange(const int32_t value)41     void FireOnStateChange(const int32_t value) const
42     {
43         if (stateChange_) {
44             stateChange_(value);
45         }
46     }
SetOnRefreshing(RefreshingEvent && refreshing)47     void SetOnRefreshing(RefreshingEvent&& refreshing)
48     {
49         refreshing_ = std::move(refreshing);
50     }
51 
FireOnRefreshing()52     void FireOnRefreshing() const
53     {
54         if (refreshing_) {
55             refreshing_();
56         }
57     }
58 
SetChangeEvent(RefreshChangeEvent && changeEvent)59     void SetChangeEvent(RefreshChangeEvent&& changeEvent)
60     {
61         changeEvent_ = std::move(changeEvent);
62     }
63 
FireChangeEvent(const std::string & value)64     void FireChangeEvent(const std::string& value) const
65     {
66         if (changeEvent_) {
67             changeEvent_(value);
68         }
69     }
70 
SetOnOffsetChange(OffsetChangeEvent && dragOffset)71     void SetOnOffsetChange(OffsetChangeEvent&& dragOffset)
72     {
73         offsetChange_ = std::move(dragOffset);
74     }
75 
ResetOnOffsetChange()76     void ResetOnOffsetChange()
77     {
78         offsetChange_ = nullptr;
79     }
80 
FireOnOffsetChange(const float value)81     void FireOnOffsetChange(const float value) const
82     {
83         if (offsetChange_) {
84             offsetChange_(value);
85         }
86     }
87 
88 private:
89     StateChangeEvent stateChange_;
90     RefreshingEvent refreshing_;
91     OffsetChangeEvent offsetChange_;
92     RefreshChangeEvent changeEvent_;
93     ACE_DISALLOW_COPY_AND_MOVE(RefreshEventHub);
94 };
95 } // namespace OHOS::Ace::NG
96 
97 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERNS_REFRESH_EVENT_HUB_H