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  1. Qt
  2. QTBUG-29843

QPrintPreviewDialog + QWebView print wrongly

XMLWordPrintable

    • Icon: Bug Bug
    • Resolution: Duplicate
    • Icon: Not Evaluated Not Evaluated
    • None
    • 5.0.1
    • GUI: Printing, WebKit
    • None
    • It happen both on Linux and Windows

      When use QPrintPreviewDialog it shows wrongly painted webpage content (wrong layouts, buttons without text, page cutted and so one), the problem is somethere related to QPicture pages in QPrinter. Try to print almost any page webpage (for example wikipedia) to see the problem (or see attachment).

      I found a way to fix this, but on qtwebkit side, by making QPicture for each page and draw it in QPrinter painter then. The following changes in QtWebkit code (qwebframe.cpp) fixes that wrong printing:

      @@ -879,7 +881,17 @@

      printer->printerState() == QPrinter::Error) { return; }
      • printContext.spoolPage(page - 1, pageRect.width());
        +
        + QPicture pagePicture;
        + QPainter pagePainter;
        + pagePainter.begin(&pagePicture);
        + pagePainter.setRenderHints(QPainter::Antialiasing
      		QPainter::TextAntialiasing QPainter::SmoothPixmapTransform QPainter::HighQualityAntialiasing);
      + pagePainter.scale(zoomFactorX, zoomFactorY);
      + QtPrintContext pagePrintContext(&pagePainter, pageRect, d);
      + pagePrintContext.spoolPage(page - 1, pageRect.width());
      + pagePainter.end();
      + painter.drawPicture(0, 0, pagePicture);
      +
      if (j < pageCopies - 1)
      printer->newPage();
      }

        1. qprintpreview_broken.png
          qprintpreview_broken.png
          158 kB
        2. qprintpreview_fixed.png
          qprintpreview_fixed.png
          196 kB
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            mibrunin Michael Bruning
            zcrendel Mozhaev Grigory
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              Created:
              Updated:
              Resolved:

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