event事件重写，显示鼠标位置

 1 void EventLabel::mouseMoveEvent(QMouseEvent *event)
 2 {
 3     this->setText(QString("<center><h1>Move:(%1,%2)</h1></center>")
 4                   .arg(QString::number(event->x()),QString::number(event->y())));
 5 }
 6 void EventLabel::mousePressEvent(QMouseEvent *event)
 7 {
 8     this->setText(QString("<center><h1>Press:(%1,%2)</h1></center>")
 9                   .arg(QString::number(event->x()),QString::number(event->y())));
10 }
11 void EventLabel::mouseReleaseEvent(QMouseEvent *event)
12 {
13     QString msg;
14     msg.sprintf("<center><h1>Release: (%d,%d)</h1></center>",
15                 event->x(),event->y());
16     this->setText(msg);
17 }

 

main函数中代码

1     EventLabel *label = new EventLabel();
2     this->hide();
3     label->setWindowTitle("MouseEvent Demo");
4     label->resize(600,400);
5     label->show();