1 /*
2  * Copyright (c) 2021-2022 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 DEVICE_OBSERVER_H
17 #define DEVICE_OBSERVER_H
18 
19 namespace OHOS {
20 namespace MMI {
21 class IDeviceObserver {
22 public:
23     virtual void UpdatePointerDevice(bool hasPointerDevice, bool isVisible, bool isHotPlug) = 0;
24 };
25 
26 class IDeviceObject {
27 public:
28     virtual void Attach(std::shared_ptr<IDeviceObserver> observer) = 0;
29     virtual void Detach(std::shared_ptr<IDeviceObserver> observer) = 0;
30     virtual void NotifyPointerDevice(bool hasPointerDevice, bool isVisible, bool isHotPlug) = 0;
31 };
32 } // namespace MMI
33 } // namespace OHOS
34 #endif // DEVICE_OBSERVER_H
35