QT 实时显示鼠标所指的坐标 && 监测键盘事件

1 捕获鼠标事件
void EventLabel::mouseMoveEvent(QMouseEvent *event)

{

QString msg;

msg.sprintf("move: %d,%d",event->x(), event->y());

this->setText(msg);

}

void EventLabel::mousePressEvent(QMouseEvent *event)

{

//QString msg;

//msg.sprintf("press: %d,%d",event->x(), event->y());

QString msg=QString("press:%1,%2").arg(event->pos().x()).arg(event->pos().y());

this->setText(msg);

}

void EventLabel::mouseReleaseEvent(QMouseEvent *event)

{

QString msg;

msg.sprintf("Release: (%d, %d)",event->x(), event->y());

this->setText(msg);

}

2 捕获键盘事件   两种方式均可
/*==========================================================查看按键事件的两种方法============================================*/

bool EventLabel::event(QEvent *e) //重写event函数

{

if (e->type() == QEvent::KeyPress)

{

QKeyEvent *keyEvent = static_cast<QKeyEvent *>(e);

if (keyEvent->key() == Qt::Key_Tab)

    {

qDebug() << "You press tab.";

return true;

}

}

return QWidget::event(e);

}

void EventLabel::keyPressEvent(QKeyEvent *event) //重写keyPressEvent函数

{

int key=event->key();

if( key==Qt::Key_F)

    {

qDebug() << "You press F.";

}

}

3 运行结果



实时显示鼠标的坐标   并且按键成功捕获

下载地址：
http://download.csdn.net/download/yunge812/10253473