Setting ui components from other file.

[QQQ]

Hi,
Tryed to set ui from seperate file by :

MainWin ee;
   ee.update_gui();

MainWin ee;
   ee.update_gui();

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In ui-window cpp file it recives but no change to ui

void MainWin::update_gui()
{
    ui->label_4->setText("eeeeeeee");
   // ui->horizontalSlider->setValue(Lugemis_kaugus/LEVEL.size());
 
   // ui->label_2->setNum(Lugemis_kaugus);
 
    //double size = LEVEL.size();
 
   // ui->label_3->setNum(size);
 
}

void MainWin::update_gui()
{
    ui->label_4->setText("eeeeeeee");
   // ui->horizontalSlider->setValue(Lugemis_kaugus/LEVEL.size());

   // ui->label_2->setNum(Lugemis_kaugus);

    //double size = LEVEL.size();

   // ui->label_3->setNum(size);

}

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Debug shows it executes but nothing changes on gui.
How to solve this problem?