键盘事件-----按下回车键则触发事件

protected:
bool eventFilter(QObject *obj, QEvent *event);

bool frmPwd::eventFilter(QObject *obj, QEvent *event)
{
//如果用户按下了回车键,则触发修改密码信号
if (event->type()==QEvent::KeyPress) {
QKeyEvent *keyEvent=static_cast<QKeyEvent *>(event);
if (keyEvent->key()==Qt::Key_Return || keyEvent->key()==Qt::Key_Enter) {
this->on_btnOk_clicked();
return true;
}
}
return QObject::eventFilter(obj,event);
}