Insert QwtPlot in QTextDocument

[giusepped]

Hi.
I would like to insert a QwtPlot inside a QTextDocument.
I know that I can do it by calling something like that:

m_cursor.insertImage(image)

m_cursor.insertImage(image)

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where image is the QwtPlot.
But: how can I grab the qwtplot into an image?

I tried

QPixmap* MyPlot::getImage()
 
{	
 
	QwtPlotPrintFilter filter;
   	int options = QwtPlotPrintFilter::PrintAll;
            options |= QwtPlotPrintFilter::PrintBackground;
            options |= QwtPlotPrintFilter::PrintFrameWithScales|QwtPlotPrintFilter::PrintMargin;
	    filter.setOptions(options);
     print(image,filter);
 
 
 
 
	return ℑ
}

QPixmap* MyPlot::getImage()

{	
	
	QwtPlotPrintFilter filter;
   	int options = QwtPlotPrintFilter::PrintAll;
            options |= QwtPlotPrintFilter::PrintBackground;
            options |= QwtPlotPrintFilter::PrintFrameWithScales|QwtPlotPrintFilter::PrintMargin;
	    filter.setOptions(options);
     print(image,filter);
      
     
	
	
	return ℑ
}

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but the debug said that the image is empty. image is a member variable (QPixmap image)
Any idea?