QT在windows上检测USB端口插拔

(使用版本为5.12.0)

需要的头文件有以下:

#include 
#include 
#include 
#include 
#include 

第一步:

注册插拔事件

 

    static const GUID GUID_DEVINTERFACE_LIST[] =
    {
    // GUID_DEVINTERFACE_USB_DEVICE
    { 0xA5DCBF10, 0x6530, 0x11D2, { 0x90, 0x1F, 0x00, 0xC0, 0x4F, 0xB9, 0x51, 0xED } },
//    // GUID_DEVINTERFACE_DISK
//    { 0x53f56307, 0xb6bf, 0x11d0, { 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b } },
//    // GUID_DEVINTERFACE_HID,
//    { 0x4D1E55B2, 0xF16F, 0x11CF, { 0x88, 0xCB, 0x00, 0x11, 0x11, 0x00, 0x00, 0x30 } },
//    // GUID_NDIS_LAN_CLASS
//    { 0xad498944, 0x762f, 0x11d0, { 0x8d, 0xcb, 0x00, 0xc0, 0x4f, 0xc3, 0x35, 0x8c } },
//    // GUID_DEVINTERFACE_COMPORT
//    { 0x86e0d1e0, 0x8089, 0x11d0, { 0x9c, 0xe4, 0x08, 0x00, 0x3e, 0x30, 0x1f, 0x73 } },
//    // GUID_DEVINTERFACE_SERENUM_BUS_ENUMERATOR
//    { 0x4D36E978, 0xE325, 0x11CE, { 0xBF, 0xC1, 0x08, 0x00, 0x2B, 0xE1, 0x03, 0x18 } },
//    // GUID_DEVINTERFACE_PARALLEL
//    { 0x97F76EF0, 0xF883, 0x11D0, { 0xAF, 0x1F, 0x00, 0x00, 0xF8, 0x00, 0x84, 0x5C } },
//    // GUID_DEVINTERFACE_PARCLASS
//    { 0x811FC6A5, 0xF728, 0x11D0, { 0xA5, 0x37, 0x00, 0x00, 0xF8, 0x75, 0x3E, 0xD1 } },
    };

    //注册插拔事件
    HDEVNOTIFY hDevNotify;
    DEV_BROADCAST_DEVICEINTERFACE NotifacationFiler;
    ZeroMemory(&NotifacationFiler,sizeof(DEV_BROADCAST_DEVICEINTERFACE));
    NotifacationFiler.dbcc_size = sizeof(DEV_BROADCAST_DEVICEINTERFACE);
    NotifacationFiler.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
    for(int i=0;iwinId()),&NotifacationFiler,DEVICE_NOTIFY_WINDOW_HANDLE);
        if(!hDevNotify)
        {
            GetLastError();
            qDebug() << "注册失败" <

第二步:

  1. 在Qt5中已经使用nativeEvent代替掉了winEvent.(都是QWidget中的虚函数,用于接收活跃的事件,就比如鼠标的移动、触发等等,这里最重要的当然是设备插拔)
  2. 重写nativeEvent函数(是QWidget的虚函数)
bool QWidget::nativeEvent(const QByteArray &eventType, void *message, long *result)
{
    MSG* msg = reinterpret_cast(message);//第一层解算
    UINT msgType = msg->message;
    if(msgType==WM_DEVICECHANGE)
    {
        PDEV_BROADCAST_HDR lpdb = PDEV_BROADCAST_HDR(msg->lParam);//第二层解算
        switch (msg->wParam) {
        case DBT_DEVICEARRIVAL:
            if(lpdb->dbch_devicetype == DBT_DEVTYP_DEVICEINTERFACE)
            {
                PDEV_BROADCAST_DEVICEINTERFACE pDevInf  = PDEV_BROADCAST_DEVICEINTERFACE(lpdb);
                QString device_name = "插入设备(name):"+QString::fromWCharArray(pDevInf->dbcc_name,int(pDevInf->dbcc_size)).toUtf8();

                qDebug()<< device_name;
            }
            break;
        case DBT_DEVICEREMOVECOMPLETE:
            if(lpdb->dbch_devicetype == DBT_DEVTYP_DEVICEINTERFACE)
            {
                PDEV_BROADCAST_DEVICEINTERFACE pDevInf  = PDEV_BROADCAST_DEVICEINTERFACE(lpdb);
                QString device_name = "移除设备(name):"+QString::fromWCharArray(pDevInf->dbcc_name,int(pDevInf->dbcc_size)).toUtf8();

                qDebug()<< device_name;
            }
            break;
        }
    }
    return false;
}

参考自:

https://blog.csdn.net/mhpmii/article/details/50240809

https://blog.csdn.net/qq61394323/article/details/45697329

QT在windows上检测USB端口插拔_第1张图片QT在windows上检测USB端口插拔_第2张图片

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