[QT]屏蔽Tab键切换控件焦点

//构造函数
check_keyboard_mouse::check_keyboard_mouse(QWidget *parent)
    : QDialog(parent)
{
    ui.setupUi(this);

    setMouseTracking(true);//使能鼠标能追踪功能

    //安装事件过滤器
    ui.edit_m_relative->installEventFilter(this);//控件1
    ui.edit_m_absolute->installEventFilter(this);//控件2
    ui.edit_keyboard->installEventFilter(this);//控件3

}

bool check_keyboard_mouse::eventFilter(QObject *obj, QEvent *event)
{
    bool isShield_KeyTab = false; //是否屏蔽Tab键

    // 控件1
    if (obj == ui.edit_m_relative) {
        if (event->type() == QEvent::KeyPress) {
            QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
            if (keyEvent->key() == Qt::Key_Tab)
            {
                qDebug() << "Tab in edit Relative";
                isShield_KeyTab =  true;//屏蔽
            }           
        }
    }

    // 控件2
    if (obj == ui.edit_m_absolute) {
        if (event->type() == QEvent::KeyPress) {
            QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
            if (keyEvent->key() == Qt::Key_Tab)
            {
                qDebug() << "Tab in edit Absolute";
                isShield_KeyTab = true;//屏蔽
            }
        }
    }

    // 控件3
    if (obj == ui.edit_keyboard) {
        if (event->type() == QEvent::KeyPress) {
            QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
            if (keyEvent->key() == Qt::Key_Tab)
            {
                qDebug() << "Tab in edit Keyboard";
                isShield_KeyTab = true;//屏蔽
            }
        }
    }
    if (isShield_KeyTab)
    {
        return true;//屏蔽Tab，不响应
    } 
    else
    {
        return QDialog::eventFilter(obj, event);//不影响其它事件操作
    }   
}