【QT】event事件使用鼠标位置

event事件重写，显示鼠标位置

void EventLabel::mouseMoveEvent(QMouseEvent *event)
{
    this->setText(QString("<center><h1>Move:(%1,%2)</h1></center>")
                  .arg(QString::number(event->x()),QString::number(event->y())));
}
void EventLabel::mousePressEvent(QMouseEvent *event)
{
    this->setText(QString("<center><h1>Press:(%1,%2)</h1></center>")
                  .arg(QString::number(event->x()),QString::number(event->y())));
}
void EventLabel::mouseReleaseEvent(QMouseEvent *event)
{
    QString msg;
    msg.sprintf("<center><h1>Release: (%d,%d)</h1></center>",
                event->x(),event->y());
    this->setText(msg);
}

main函数中代码

    EventLabel *label = new EventLabel();
    3     label->setWindowTitle("MouseEvent Demo");
    label->resize(600,400);
    label->show();