Print a QDialog in a PDF file

[jjay]

Hi,

I have to save a QDialog : mainWindow (with all his children : QTextEdit, QTableView, ...) in a pdf file.

But when I do that :

QPrinter prn;
prn.setOutputFileName("out.pdf");
QPrintDialog(&prn, mainWindow).exec();
mainWindow.render(&prn);

QPrinter prn;
prn.setOutputFileName("out.pdf");
QPrintDialog(&prn, mainWindow).exec();
mainWindow.render(&prn);

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Only mainWindow is printed
How can I print all children ?

Thanks