[SOLVED] Print to pdf

[Morea]

I have made som drawings in a mainwindow and now I would like to export it to a pdf file or postscript. How can I do that?

[jpn]

Try painting on a QPrinter (whose output format is set to QPrinter::PdfFormat).

EDIT: an example:

QPrinter printer(QPrinter::HighResolution);
printer.setOutputFormat(QPrinter::PdfFormat);
printer.setOutputFileName("test.pdf");
QPainter painter;
painter.begin(&printer);
// draw the content
// painter.draw..(..);
painter.end();

QPrinter printer(QPrinter::HighResolution);
printer.setOutputFormat(QPrinter::PdfFormat);
printer.setOutputFileName("test.pdf");
QPainter painter;
painter.begin(&printer);
// draw the content
// painter.draw..(..);
painter.end();

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[mickey]

..and if I want print into a pdf the content of myGLWidget(it draw with paintGL())?

[wysota]

Save it into QImage or QPixmap using appropriate methods from QGLWidget and then print as usual.

[mickey]

thanks, to print directly my scene do I need insert an istruction like :

QImage qi=qp.convertToImage();
qi.save(base_file + ".png","PNG");
painter.begin(&printer);
   /////painter.draw(qi);??????????????? Is it there?
painter.end();

QImage qi=qp.convertToImage();
qi.save(base_file + ".png","PNG");
painter.begin(&printer);
   /////painter.draw(qi);??????????????? Is it there?
painter.end();

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because my printer starts but print nothing...

[Uwe]

Save it into QImage or QPixmap using appropriate methods from QGLWidget and then print as usual.

PDF is a scalable format, what gets lost doing it via a pixmap/image.
If vector data has to be painted, one should always try to render the PDF documents with QPainter using drawing primitives like lines, rects ... . Of course the geometry of these primitives has to be in qreals.

HTH,
Uwe

[mickey]

sorry but my question isn't relative to pdf format; I save the content of myGLWidget in a QImage qi; now I'd like to print it! the printer starts but the sheet is white. What am I missing? Thanks

[jpn]

Do you paint anything? See QPainter::drawImage().
For example:

painter.drawImage(0,0,qi);

painter.drawImage(0,0,qi);

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[mickey]

I tried this but print nothing again....

qi.save(base_file + ".png","PNG");
	QPrinter printer(QPrinter::HighResolution);
	printer.setFullPage( TRUE );
	printer.setPageSize(QPrinter::A4);
	if ( printer.setup(this) ) {               // printer dialog
        statusBar()->message( "Printing..." );
        QPainter p;
		QPainter painter;
		painter.drawImage(0,0,qi, 10,10, 20,20); 
		if( !painter.begin( &printer ) ) {               // paint on printer
				statusBar()->message( "Printing aborted", 2000 );
				return;
		}		
 
		painter.end(); 
		statusBar()->message("");
	}

qi.save(base_file + ".png","PNG");
	QPrinter printer(QPrinter::HighResolution);
	printer.setFullPage( TRUE );
	printer.setPageSize(QPrinter::A4);
	if ( printer.setup(this) ) {               // printer dialog
        statusBar()->message( "Printing..." );
        QPainter p;
		QPainter painter;
		painter.drawImage(0,0,qi, 10,10, 20,20); 
		if( !painter.begin( &printer ) ) {               // paint on printer
				statusBar()->message( "Printing aborted", 2000 );
				return;
		}		
		
		painter.end(); 
		statusBar()->message("");
	}

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[wysota]

PDF is a scalable format, what gets lost doing it via a pixmap/image.
If vector data has to be painted, one should always try to render the PDF documents with QPainter using drawing primitives like lines, rects ... . Of course the geometry of these primitives has to be in qreals.

HTH,
Uwe

The point is this is an OpenGL widget and I doubt you'll be able to use QPainter directly with it (meaning without GL context). IMHO you have to convert it to a bitmap first.

[mickey]

if (printer.setup(this)) {
		QPainter painter(&printer);
		QRect rect = painter.viewport();
		QSize size = qi.size();
		size.scale(rect.size(), QSize::ScaleMin);
		painter.setViewport(rect.x(), rect.y(),
		size.width(), size.height());
		painter.setWindow(qi.rect());
		painter.drawImage(0, 0, qi);
}

if (printer.setup(this)) {
		QPainter painter(&printer);
		QRect rect = painter.viewport();
		QSize size = qi.size();
		size.scale(rect.size(), QSize::ScaleMin);
		painter.setViewport(rect.x(), rect.y(),
		size.width(), size.height());
		painter.setWindow(qi.rect());
		painter.drawImage(0, 0, qi);
}

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