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 #include "mousewheel_input.h"
16 #include <QtCore/qcoreevent.h>
17 #include <QtCore/qvariant.h>
18 #include <qdebug.h>
19 
20 static int16_t g_rotate = 0;
21 
22 namespace OHOS {
23 #if defined(USE_MOUSEWHEEL) && USE_MOUSEWHEEL
24 #if ENABLE_ROTATE_INPUT
GetInstance()25 MousewheelInput* MousewheelInput::GetInstance()
26 {
27     static MousewheelInput mousewheelInput;
28     return &mousewheelInput;
29 }
30 
Read(DeviceData & data)31 bool MousewheelInput::Read(DeviceData &data)
32 {
33     data.rotate = g_rotate;
34     g_rotate = 0;
35     return false;
36 }
MousewheelHandler(QWheelEvent * event)37 void MousewheelInput::MousewheelHandler(QWheelEvent *event)
38 {
39     if (event == nullptr) {
40         return;
41     }
42     g_rotate += -event->delta() / 120; // 120 : Qt use 120 as one mousewheel step value
43 }
44 #endif
45 #endif
46 } // namespace OHOS
47