Hi,

I am proting my application from qt3 to qt4 using Qt3Support.
My Problem is , in my PRINTING CODE ( which was working both in WINDOWS && LINUX in Qt3 ) . Now after porting to Qt4 the same PRINTING CODE is CRASHING in WINDOWS...

See the code below ....


Qt Code: 
  1. void ChemCanvas::printToPrinter( const RouteList *routeList )
  2. {
  3.  
  4.  
  5. 	// printer object
  6. #if (QT_VERSION < 0x030000)
  7. 	QPrinter    printer;		
  8. #else
  9. 	QPrinter		printer( QPrinter::HighResolution );
  10.  
  11. #endif
  12. 	// original wcOrigin, saved to be restored after printing.
  13. 	QPoint originalWcOrigin = wcOrigin;
  14.  
  15. 	// With this set as true, objectNeedsRepainting won't
  16. 	// draw while scaling to printer canvas
  17. 	printing = TRUE;
  18.  
  19. 	// Set default printer characteristics to conform to the current
  20. 	// canvas settings.
  21. 	printer.setPageSize ( mappings.pageSize() );
  22. 	printer.setOrientation( mappings.orientation() );
  23. 	printer.setOutputFileName ( 
  24. 		(const char *)chemGlobals->printerDefaultFilename() );
  25. 	qDebug() << (const char *)chemGlobals->printerDefaultFilename();
  26. //	printer.setOutputToFile ( FALSE );
  27. 	// Set full page mode, in order to have control of page size
  28. 	printer.setFullPage( TRUE );
  29.  
  30. 	// Run the printer setup dialog, and if the user clicks 'ok' then
  31. 	// do the actual printing
  32. #if defined(_OS_WIN32_) || defined(Q_OS_WIN32)
  33. 	Q_CHECK_PTR(&printer);
  34. 	//if ( printer.setup( this ) )	
  35. 	QPrintDialog *printDialog = new QPrintDialog(&printer, this);
  36. 	Q_ASSERT( printDialog );
  37.  if( printDialog->exec() == QDialog::Accepted )   // HERE  IT IS CRASHING...
  38. #else       
  39. 	QPrintDialog printerDialog( &printer );
  40. 	printerDialog.setPrinter( &printer, TRUE );
  41. 	if( printerDialog.exec() )
  42. #endif
  43. 		{
  44. 		// Set the hourglass cursor
  45. 		QApplication::setOverrideCursor( waitCursor );
  46.  
  47.                ------------------
  48.                ------------------  //  Other stuff for printing...
  49.                -------------------
  50.  
  51.               }
  52. }
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Please tell me why it is CRASHING only in WINDOWS .
Its working in LINUX properly.


Hlep me ...!!!
thanks in advance..