what unit is used in QTextDocument::setPageSize() method?

My program involve printing to a roll script which is just 8 cm width. I have set the paper size of the QPrinter accordingly. The content is rendered from a QTextDocument object. The output was cropped on the right side. Hence I would like to set the page size on the QTextDocument in order to render the content correctly. The problem is, what unit is used in the QTextDocument::setPageSize method?

Here is my code snip.

Code:

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QTextDocument *lpDocument(ui.mpTextEditPrintOut->document());
	QPrinter lrPrinter;
 
	QPrintDialog* lpDlg(new QPrintDialog(&lrPrinter, this));
	lrPrinter.setPaperSize(QSizeF(8.0, 10.0), QPrinter::Millimeter);
	lrPrinter.setPageMargins(0.0, 0.0, 0.0, 0.0, QPrinter::Millimeter);
	if (lpDlg->exec() != QDialog::Accepted)
	{
		return;
	}
 
	lpDocument->print(&lrPrinter);

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development environment:
Qt 4.4.0.
MSVC 8.0 SP1 with Qt Visual Studio Integration 1.4.0.
Win XP SP3.

I think you meant:

Code:

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lrPrinter.setPaperSize(QSizeF(80, 100), QPrinter::Millimeter);

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If you look at the mergins after this:

Code:

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lrPrinter.setPageMargins(0.0, 0.0, 0.0, 0.0, QPrinter::Millimeter);

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you might find they are not zero and shifting your output to the right. Something similar to this is happening to me on Windows (http://www.qtcentre.org/forum/f-qt-p...ffs-23771.html), where even

Code:

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setFullPage(true);

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does not seem to help.

Does it look correct if you output to PDF?

The unit for QTextDocument is point (pt).

Code:

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const qreal PT_MM = 25.4/72.0;
document.setDocumentMargin(20.0/PT_MM); // sets margin to 20mm

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It also works with html images:

Code:

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document.setHtml("<img src=\"anyimg.jpg\" width = 200 />); // creates an image 200pt = 200*PT_MM millimeters wide

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To set a PageSize use:

Code:

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QSizeF size = printer.paperSize(QPrinter::Point);
document.setPageSize(size);

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