Hi all,
the code that follows stop working correctly when I upgrade from Qt4.2.2 to Qt4.4.3..
The only think printed is a bold black line..

Any clue about how I can solve?

Thx very mutch

Qt Code: 
  1. QPrinter printer(QPrinter::HighResolution);
  2. 	printer.setOrientation(QPrinter::Landscape);
  3.  
  4.  	QTableWidget *newTableWidget = tableWidget;
  5.  
  6. 	QPrintDialog dlg(&printer, this);
  7.  
  8. 	if (dlg.exec() == QDialog::Accepted) 
  9.     {
  10.         // calculate the total width/height table would need without scaling  
  11.         const int rows = newTableWidget ->model()->rowCount(); 
  12.         const int cols = newTableWidget ->model()->columnCount();  
  13.  
  14. 		double totalWidth = 0.0;
  15.  
  16.         for (int c = 0; c < cols; ++c)  
  17.         {  
  18. 			totalWidth += newTableWidget ->columnWidth(c); 
  19.         }
  20.  
  21. 		double totalHeight = 0.0;
  22.  
  23.         for (int r = 0; r < rows; ++r) 
  24.         { 
  25. 			totalHeight += newTableWidget ->rowHeight(r);
  26.         }
  27.  
  28. 		double totalHeight1;
  29. 		int num_page = 1;
  30.  
  31. 		while (totalHeight > 900)
  32. 		{
  33. 			totalHeight1 = 900;
  34.  
  35. 			// redirect table's painting on a pixmap 
  36. 			QPixmap pixmap(totalWidth, newTableWidget->horizontalHeader()->height());
  37. 			QPixmap pixmap1(totalWidth, totalHeight1);
  38.  
  39. 			QPaintEvent event(QRect(0, 0, totalWidth, newTableWidget->horizontalHeader()->height()));
  40. 			QPaintEvent event1(QRect(0, 0, totalWidth, totalHeight1));
  41.  
  42. 			QPainter::setRedirected(newTableWidget->horizontalHeader()->viewport(), &pixmap);		
  43. 			QApplication::sendEvent(newTableWidget->horizontalHeader()->viewport(), &event);
  44. 			QPainter::restoreRedirected(newTableWidget->horizontalHeader()->viewport());
  45.  
  46. 			QPainter::setRedirected(newTableWidget->viewport(), &pixmap1);		
  47. 			QApplication::sendEvent(newTableWidget->viewport(), &event1);	
  48. 			QPainter::restoreRedirected(newTableWidget->viewport());
  49.  
  50. 			// print scaled pixmap 
  51. 			QPainter painter(&printer);
  52.  
  53. 			QDateTime dataDiOggi = QDateTime::currentDateTime();
  54. 			QString dataDiOggiStringa = dataDiOggi.toString("dd.MM.yyyy hh:mm:ss");
  55.  
  56. 			painter.drawText(0, 250, tr("Qt 4.3.3 - Date: %1 -") .arg(dataDiOggiStringa));
  57. 			painter.drawText(0, 150, tr("Page %1") .arg(num_page));
  58.  
  59. 			painter.scale(4.5,4.5);
  60. 			painter.drawPixmap(0, 100, totalWidth, newTableWidget->horizontalHeader()->height(), pixmap);
  61. 			painter.drawPixmap(0, 100+newTableWidget->horizontalHeader()->height(), totalWidth, totalHeight1, pixmap1);
  62.  
  63. 			totalHeight = totalHeight - totalHeight1;
  64. 			printer.newPage();
  65. 			numero_pagina = numero_pagina + 1;
  66. 		}
  67.  
  68. 		QPixmap pixmap(totalWidth, newTableWidget->horizontalHeader()->height());
  69. 		QPixmap pixmap1(totalWidth, totalHeight);
  70.  
  71. 		QPaintEvent event(QRect(0, 0, totalWidth, newTableWidget->horizontalHeader()->height()));
  72. 		QPaintEvent event1(QRect(0, 0, totalWidth, totalHeight));
  73.  
  74. 		QPainter::setRedirected(newTableWidget->horizontalHeader()->viewport(), &pixmap);		
  75. 		QApplication::sendEvent(newTableWidget->horizontalHeader()->viewport(), &event);
  76. 		QPainter::restoreRedirected(newTableWidget->horizontalHeader()->viewport());
  77.  
  78. 		QPainter::setRedirected(newTableWidget->viewport(), &pixmap1);		
  79. 		QApplication::sendEvent(newTableWidget->viewport(), &event1);	
  80. 		QPainter::restoreRedirected(newTableWidget->viewport());
  81.  
  82. 		// print scaled pixmap 
  83. 		QPainter painter(&printer);
  84.  
  85. 		QDateTime dataDiOggi = QDateTime::currentDateTime();
  86. 		QString dataDiOggiStringa = dataDiOggi.toString("dd.MM.yyyy hh:mm:ss");
  87.  
  88. 		painter.drawText(0, 250, tr("Qt 4.3.3 - Date: %1 - ") .arg(dataDiOggiStringa));
  89. 		painter.drawText(0, 150, tr("Page %1") .arg(num_page));
  90.  
  91. 		painter.scale(4.5,4.5);
  92. 		painter.drawPixmap(0, 100, totalWidth, newTableWidget->horizontalHeader()->height(), pixmap);
  93. 		painter.drawPixmap(0, 100+newTableWidget->horizontalHeader()->height(), totalWidth, totalHeight, pixmap1);
  94. 	}
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