I did like this ...

Qt Code: 
  1. QPrinter printer(QPrinter::HighResolution);
  2. 	printer.setOrientation(QPrinter::Landscape);
  3.  
  4. 	QPrintDialog dlg(&printer, this);
  5.  
  6.     if (dlg.exec() == QDialog::Accepted) 
  7.     {
  8.         // calculate the total width/height table would need without scaling  
  9.         const int rows = tableWidget->model()->rowCount(); 
  10.         const int cols = tableWidget->model()->columnCount();  
  11.  
  12. 		double totalWidth = 0.0;
  13.  
  14.         for (int c = 0; c < cols; ++c)  
  15.         {  
  16. 			totalWidth += tableWidget->columnWidth(c); 
  17.         }
  18.  
  19. 		double totalHeight = tableWidget->horizontalHeader()->height();
  20.  
  21.         for (int r = 0; r < rows; ++r) 
  22.         { 
  23. 			totalHeight += tableWidget->rowHeight(r);
  24.         }
  25.  
  26.  
  27. 		// redirect table's painting on a pixmap 
  28.         QPixmap pixmap(totalWidth, totalHeight );
  29.  
  30. 		QPainter::setRedirected(tableWidget->horizontalHeader()->viewport(), &pixmap);
  31. 		QPainter::setRedirected(tableWidget->viewport(), &pixmap);
  32.  
  33.         QPaintEvent event(QRect(0, 0, totalWidth, totalHeight ));
  34.  
  35. 		QApplication::sendEvent(tableWidget->horizontalHeader()->viewport(), &event);		
  36. 		QApplication::sendEvent(tableWidget->viewport(), &event);
  37.  
  38. 		QPainter::restoreRedirected(tableWidget->horizontalHeader()->viewport());
  39.         QPainter::restoreRedirected(tableWidget->viewport());
  40.  
  41.  
  42.  
  43.         // print scaled pixmap 
  44.         QPainter painter(&printer);
  45. 		painter.scale(4,4);
  46.         //painter.drawPixmap(printer.pageRect(), pixmap, pixmap.rect());
  47. 		painter.drawPixmap(printer.pageRect().topLeft(), pixmap, pixmap.rect());
  48. 	}
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but I do not get the point..

What's wrong with that code??

Thank you for your patience

Roby