Printing resolution indipendent, in millimeters

**_Jack_** · 24th April 2010, 21:51

Hi to all,
I want to draw and print some basic shapes like squares and I need the way to use millimeter unit in natural way.
For example I need to print an exact 10 * 10 mm square
I expect to print a square starting a t x=20 mm, y =20 mm with 10 mm side.. .but something wrong about dimension of printer output.
Could someone please put me in the rigth way or provide a little example about conversion to the measure unit used in Qpainter and the unit used in Printer?

Many thanks in advance.
this is the code I'm using:

Qt Code:

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QPrinter printer(QPrinter::HighResolution);
 printer.setResolution(600);
 printer.setPaperSize(QPrinter::A4);
 printer.setOrientation (QPrinter::Portrait);
 printer.setNumCopies(1);
 
 QPainter painter;
 painter.begin(&printer);
 painter.drawRect(20,20,10,10);
 painter.end();

QPrinter printer(QPrinter::HighResolution);
 printer.setResolution(600);
 printer.setPaperSize(QPrinter::A4);
 printer.setOrientation (QPrinter::Portrait);
 printer.setNumCopies(1);

 QPainter painter;
 painter.begin(&printer);
 painter.drawRect(20,20,10,10);
 painter.end();

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