_NET_SUPPORTED not updated

#include "widget.h"
#include <QDebug>
#include <QPlainTextEdit>
#include <QLineEdit>
#include <QPushButton>
#include <QVBoxLayout>
#include <QLabel>
#include <QTimer>
#include <QSpinBox>

Widget::Widget(QWidget *parent) :
    QDialog(parent)
{
    QTimer* timer = new QTimer;
    timer->setInterval(2000);
    timer->start();
    connect(timer,&QTimer::timeout,[=](){
       this->show();
        this->activateWindow();
    });

    this->resize(800,600);
}

Widget::~Widget()
{

}

void Widget::on_pushButton_clicked()
{

}