1 /*
2 * Copyright (c) 2024 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 META_API_PROPERTY_ARRAY_PROPERTY_EVENT_HANDLER_H
17 #define META_API_PROPERTY_ARRAY_PROPERTY_EVENT_HANDLER_H
18
19 #include <meta/api/property/array_property_changes_recognizer.h>
20 #include <meta/api/property/property_event_handler.h>
21 #include <meta/interface/property/array_property.h>
22 #include <meta/interface/simple_event.h>
23
META_BEGIN_NAMESPACE()24 META_BEGIN_NAMESPACE()
25
26 /// Helper to have events with array property element changes
27 template<typename ValueType>
28 class ArrayPropertyChangedEventHandler {
29 public:
30 ArrayPropertyChangedEventHandler() = default;
31
32 using Property = ArrayProperty<ValueType>;
33 using ArrayChange = ArrayChanges<ValueType>;
34 using FunctionType = void(const ArrayChange&);
35
36 template<typename T>
37 bool Subscribe(const Property& property, T* instance, void (T::*callback)(const ArrayChange&))
38 {
39 changesRecognizer_.SetValue(property);
40 return handler_.Subscribe(
41 property, [=]() { (instance->*callback)(changesRecognizer_.OnArrayPropertyChanged(property)); });
42 }
43
44 bool Subscribe(const Property& property, void (*callback)(const ArrayChange&))
45 {
46 changesRecognizer_.SetValue(property);
47 return handler_.Subscribe(property, [=]() { callback(changesRecognizer_.OnArrayPropertyChanged(property)); });
48 }
49
50 template<typename Func, typename = EnableIfCanInvokeWithArguments<Func, FunctionType>>
51 bool Subscribe(const Property& property, Func func, const ITaskQueue::Ptr& queue = nullptr)
52 {
53 changesRecognizer_.SetValue(property);
54 return handler_.Subscribe(
55 property,
56 [this, property, f = BASE_NS::move(func)]() { f(changesRecognizer_.OnArrayPropertyChanged(property)); },
57 queue);
58 }
59
60 template<typename Func, typename = EnableIfCanInvokeWithArguments<Func, FunctionType>>
61 bool Subscribe(const Property& property, Func func, const BASE_NS::Uid& queueId)
62 {
63 changesRecognizer_.SetValue(property);
64 return handler_.Subscribe(
65 property,
66 [this, property, f = BASE_NS::move(func)]() { f(changesRecognizer_.OnArrayPropertyChanged(property)); },
67 queueId);
68 }
69
70 void Unsubscribe()
71 {
72 handler_.Unsubscribe();
73 changesRecognizer_.Clear();
74 }
75
76 private:
77 ArrayPropertyChangesRecognizer<ValueType> changesRecognizer_;
78 META_NS::PropertyChangedEventHandler handler_;
79 };
80
81 META_END_NAMESPACE()
82
83 #endif
84