QDialog - no title bar

[Tomasz]

Hello!

I've wrote simple program that have main window and dialog window which can by open by clicking a button. Code of that dialog window looks like this:

#include <QGridLayout>
#include <QPushButton>
#include <QIcon>
 
#include "pomiary.h"
 
Pomiary::Pomiary(QWidget *parent)
    : QDialog(parent)
{
    setupUI();
}
 
void Pomiary::setupUI()
{
    setModal(true);
    setGeometry(QRect(50,0,100,150));
    setWindowIcon(QIcon(":/images/icon.png"));
 
    QGridLayout* PomiaryLayout = new QGridLayout;
    setLayout(PomiaryLayout);
 
    QPushButton *button = new QPushButton();
    button->setIcon(QIcon(":/images/icon2.png"));
    button->setIconSize(QSize(48, 48));
    button->setFixedSize(60, 60);
    PomiaryLayout->addWidget(button,0,0,Qt::AlignHCenter);
 
}

#include <QGridLayout>
#include <QPushButton>
#include <QIcon>

#include "pomiary.h"

Pomiary::Pomiary(QWidget *parent)
    : QDialog(parent)
{
    setupUI();
}

void Pomiary::setupUI()
{
    setModal(true);
    setGeometry(QRect(50,0,100,150));
    setWindowIcon(QIcon(":/images/icon.png"));

    QGridLayout* PomiaryLayout = new QGridLayout;
    setLayout(PomiaryLayout);

    QPushButton *button = new QPushButton();
    button->setIcon(QIcon(":/images/icon2.png"));
    button->setIconSize(QSize(48, 48));
    button->setFixedSize(60, 60);
    PomiaryLayout->addWidget(button,0,0,Qt::AlignHCenter);

}

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and when I open my application i don't have title bar on dialog window so I can't close it. I've tried to use setWindowFlags() but with no result. Only If I delete 'setGeometry()' window has title bar but is very small, and I want specific size. What I'm doing wrong?

thanks in advance
best regards
Tomasz