QT 检测USB插拔

#include
#include
#include
#include
#include

第一步：定义USB的GUID （全局唯一标识符）

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 } }
};




第二步:注册设备通知到窗口

//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; i < sizeof(GUID_DEVINTERFACE_LIST) / sizeof(GUID); i++)
{
NotifacationFiler.dbcc_classguid = GUID_DEVINTERFACE_LIST[i];//GetCurrentUSBGUID();//m_usb->GetDriverGUID();


hDevNotify = RegisterDeviceNotification((HANDLE)this->winId(), &NotifacationFiler, DEVICE_NOTIFY_WINDOW_HANDLE);
if (!hDevNotify)
{
int Err = GetLastError();
qDebug() << QStringLiteral("注册失败");
}
//else
}


第三步：重写nativeEvent()

const MSG *msg = reinterpret_cast(message);

if (msg->message == WM_DEVICECHANGE) {


PDEV_BROADCAST_HDR lpdb = (PDEV_BROADCAST_HDR)msg->lParam;
switch (msg->wParam) {
case DBT_DEVICEARRIVAL:
emit signal_deviceChange(msg->wParam, msg->lParam);
break;
case DBT_DEVICEREMOVECOMPLETE:
emit signal_deviceChange(msg->wParam, msg->lParam);
break;
default:
break;
}


}
return false;

如果无法识别插拔，可以将注释打开

补充：Qt4 迁移到Qt5 winEvent代替为nativeEvent