对事件进行重写

//进入事件
void MyPopDialog::enterEvent(QEvent * event)
{
    QWidget::enterEvent(event);
    //可以进行抢占焦点setfocus(true);
}

//键盘按下事件，还有释放事件release
void MyPopDialog::keyPressEvent(QKeyEvent *event)
{
    if (event->key() == Qt::Key_Enter || event->key() == Qt::Key_Return) {
        MyButton->click();
    }
    QWidget::keyPressEvent(event);
}

void MyPopDialog::keyReleaseEvent(QKeyEvent *event)
{
    return;
}


//鼠标事件（实现鼠标左键拖动窗口）
void MyPopDialog::mousePressEvent(QMouseEvent *event)
{
    if(event->button() == Qt::LeftButton) {
        if (isMaximize) {
            isMove = false;
        } else {
            mousePressPoint = event->globalPos() - this->pos(); //当前鼠标位置
            isMove = true;
        }
    } else {
        isMove = false;
    }
}