Processo Ok or Cancel in a QFileDialog

[gt.beta2]

Hi

I'm using this function to get a file name.

void class::function(){
     QFileDialog::Options options;
     QString selectedFilter;
     QString fileName = QFileDialog::getOpenFileName(this,
                                 tr("QFileDialog::getOpenFileName()"),
                                 lineEdit->text(),
                                 tr("PNG image format (*.png)"),
                                 &selectedFilter,
                                 options);
     if (!fileName.isEmpty())
         lineEdit->setText(fileName);
}

void class::function(){
     QFileDialog::Options options;
     QString selectedFilter;
     QString fileName = QFileDialog::getOpenFileName(this,
                                 tr("QFileDialog::getOpenFileName()"),
                                 lineEdit->text(),
                                 tr("PNG image format (*.png)"),
                                 &selectedFilter,
                                 options);
     if (!fileName.isEmpty())
         lineEdit->setText(fileName);
}

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How can i know if the user pressed Ok or Cancel?

Thanks