1 /*
2  * Copyright (c) 2020-2021 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 GRAPHIC_LITE_INPUT_EVENT_DISTRIBUTER_H
17 #define GRAPHIC_LITE_INPUT_EVENT_DISTRIBUTER_H
18 
19 #include <set>
20 #include "gfx_utils/input_event_info.h"
21 
22 namespace OHOS {
23 /**
24  * @brief Distributer distribute all input events to specific window.
25  */
26 class InputEventDistributer {
27 public:
InputEventDistributer()28     InputEventDistributer() {}
~InputEventDistributer()29     ~InputEventDistributer() {}
30 
31     /**
32      * @brief Distribute input events.
33      *
34      * @param [in] events events waiting for distribution.
35      * @param [in] size total size of events.
36      *
37      */
38     void Distribute(const RawEvent* events, int32_t size);
39 
40     /**
41      * @brief Listener of raw event.
42     */
43     class RawEventListener {
44     public:
45         virtual void OnRawEvent(const RawEvent& event) = 0;
46     };
47 
48     /**
49      * @brief Add a raw event listener.
50      *
51      * @param listener raw event listener.
52      */
AddRawEventListener(RawEventListener * listener)53     void AddRawEventListener(RawEventListener* listener)
54     {
55         if (listener == nullptr) {
56             return;
57         }
58         rawEventListeners_.insert(listener);
59     }
60 
61     /**
62      * @brief Remove a raw event listener.
63      *
64      * @param listener raw event listener.
65      */
RemoveRawEventListener(RawEventListener * listener)66     void RemoveRawEventListener(RawEventListener* listener)
67     {
68         if (listener == nullptr) {
69             return;
70         }
71         rawEventListeners_.erase(listener);
72     }
73 private:
74     std::set<RawEventListener*> rawEventListeners_;
75 };
76 } // namespace OHOS
77 #endif // GRAPHIC_LITE_INPUT_EVENT_DISTRIBUTER_H