RichText printing with HighResolution printer

[ghorwin]

Heureka!

The Qt-Documentation is somewhat sparse at this point. In any case when printing with HighResolution you always have to specify the QPaintDevice before drawing. This applies to QFontMetrics where you need to instantiate the instance with

QFontMetrics fm(myFont, p->device()); // p = QPainter *

QFontMetrics fm(myFont, p->device()); // p = QPainter *

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Also, for the rich-text printing, you need to set the QPaintDevice before drawing. The code snipped below shows how it works:

QAbstractTextDocumentLayout* layout = text.documentLayout();
 
layout->setPaintDevice(painter->device()); // this is needed for HighRes printing
 
QAbstractTextDocumentLayout::PaintContext context;
context.palette.setColor(QPalette::Text, painter->pen().color());
layout->draw(painter, context);

QAbstractTextDocumentLayout* layout = text.documentLayout();

layout->setPaintDevice(painter->device()); // this is needed for HighRes printing

QAbstractTextDocumentLayout::PaintContext context;
context.palette.setColor(QPalette::Text, painter->pen().color());
layout->draw(painter, context);

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