Dialog immediately vanishes on MacOS X

[rexi11]

Hi there,

I have a class inherited from QGraphicsScene. I want to implement a print() method to render all graphic content of the corresponding QGraphisView onto a page with some user interaction.
Here is the code snippet:

void MyGraphicsScene::print( void )
{
   QPrinter printer( QPrinter::HighResolution );
 
   ...
 
   QPageSetupDialog psDlg( &printer );
   if ( psDlg.exec() != QDialog::Accepted ) return;
 
   ...
 
   // go on for QPrintDialog and print using QGraphicsView::render(...)
   ...
}

void MyGraphicsScene::print( void )
{
   QPrinter printer( QPrinter::HighResolution );

   ...

   QPageSetupDialog psDlg( &printer );
   if ( psDlg.exec() != QDialog::Accepted ) return;

   ...

   // go on for QPrintDialog and print using QGraphicsView::render(...)
   ...
}

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This works as expected on Windows (NT) but on MacOS X (10.5.8, Qt 4.7) the page setup dialog shows up and immediately vanishes without interaction.

I tried all varations I could think of by studying QPageSetupDialog, QDialog documentation and related threads here (open(), exec() vs show(), stack vs heap, etc..), no change.

I don't think this is specific to QPageSetupDialog. Any idea?

Thanks for helping me out!