QT实时捕获鼠标及键盘事件

#include "mainwindow.h" #include "ui_mainwindow.h" #include <QDebug> //注意添加这个头文件 #include <QMouseEvent> 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); } /*==========================================================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."; } }