Linux Qt动态监测鼠标插入或者拔出
时间: 2024-11-06 13:14:57 浏览: 19
Qt C++ 动态检测优盘插入或拔出
在Linux环境下,如果你想动态监测鼠标(或其他外设)的插入或拔出,你可以使用Qt库中的QInputDevice和QObject::connect信号槽机制。以下是一个简单的步骤:
1. 首先,你需要包含所需的头文件:
```cpp
#include <QApplication>
#include <QGuiApplication>
#include <QDesktopWidget>
#include <QInputEvent>
#include <QTimer>
#include <QList<QInputDevice>>
```
2. 创建一个`QObject`派生类,比如`MouseDetector`,并添加一个信号和一个槽函数来处理鼠标事件:
```cpp
class MouseDetector : public QObject {
public:
Q_OBJECT
explicit MouseDetector(QObject *parent = nullptr) : QObject(parent) {
//...
}
signals:
void mouseInserted(QInputDevice *device);
void mouseRemoved(QInputDevice *device);
private slots:
void deviceInserted(QInputDevice *device) {
if (device->isMouse()) {
emit mouseInserted(device);
}
}
void deviceRemoved(QInputDevice *device) {
if (device->isMouse()) {
emit mouseRemoved(device);
}
}
};
```
3. 初始化列表监听所有输入设备的变化:
```cpp
QList<QInputDevice> devices = QInputContext::availableDevices();
for (const auto &device : devices) {
connect(&device, &QInputDevice::inserted, this, &MouseDetector::deviceInserted);
connect(&device, &QInputDevice::removed, this, &MouseDetector::deviceRemoved);
}
```
4. 启动定时检查设备变化:
```cpp
QTimer *timer = new QTimer(this);
connect(timer, &QTimer::timeout, [this]() {
devices = QInputContext::availableDevices();
});
timer->start(500); // 检查频率可根据需要调整,单位是毫秒
```
当有新的鼠标设备插入或已有的鼠标设备移除时,`mouseInserted`和`mouseRemoved`信号会被发出。
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