C++ Qt实现拦截自身键盘事件_qt linux 霸屏屏蔽键盘

#include <QCoreApplication>
#include <QDebug>
#include <QAbstractNativeEventFilter>
#include <QKeyEvent>
 
#ifdef Q_OS_WIN
    #include <qt_windows.h>
#elif defined(Q_OS_LINUX)
    #include <X11/Xlib.h>
    #include <X11/Xutil.h>
#endif
 
class KeyboardInterceptor : public QAbstractNativeEventFilter
{
public:
    bool nativeEventFilter(const QByteArray &eventType, void *message, long *result) override
    {
        Q_UNUSED(eventType);
        Q_UNUSED(result);
 
        if (eventType == "windows_generic_MSG" && message != nullptr)
        {
            MSG *msg = static_cast<MSG *>(message);
 
            if (msg->message == WM_KEYDOWN || msg->message == WM_SYSKEYDOWN)
            {
                // 拦截按下事件
                qDebug() << "Key down - VK code: " << msg->wParam;
                return true; // 返回true以拦截事件
            }
            else if (msg->message == WM_KEYUP || msg->message == WM_SYSKEYUP)
            {
                // 拦截释放事件
                qDebug() << "Key up - VK code: " << msg->wParam;
                return true; // 返回true以拦截事件
            }
        }
 
#ifdef Q_OS_LINUX
        // 在Linux上拦截键盘事件
        if (eventType == "xcb_generic_event_t" && message != nullptr)
        {
            xcb_generic_event_t *ev = static_cast<xcb_generic_event_t *>(message);
 
            if (ev->response_type & XCB_EVENT_MASK_KEY_PRESS)
            {
                xcb_key_press_event_t *keyEvent = static_cast<xcb_key_press_event_t *>(message);
 
                // 拦截按下事件
                qDebug() << "Key down - Key code: " << keyEvent->detail;
                return true; // 返回true以拦截事件
            }
            else if (ev->response_type & XCB_EVENT_MASK_KEY_RELEASE)
            {
                xcb_key_release_event_t *keyEvent = static_cast<xcb_key_release_event_t *>(message);
 
                // 拦截释放事件
                qDebug() << "Key up - Key code: " << keyEvent->detail;
                return true; // 返回true以拦截事件
            }
        }
#endif
 
        return false; // 返回false以继续处理事件
    }
};
 
int main(int argc, char *argv[])
{
    QCoreApplication app(argc, argv);
 
    KeyboardInterceptor interceptor;
    app.installNativeEventFilter(&interceptor);
 
    return app.exec();
}