[reportlab-users] Automatically set Page Scaling and Print?

[Robin Becker]

kevin wrote:

> Hi all,

> 

> We use reportlab to generate printing labels and barcode lists.  At the 

> moment we are fervently telling people to turn off "Page Scaling" (to 

> None) before printing their documents.

> 

> Is there a way that this could be set up automatically while generating 

> the reportlab document?  I have seen PDF documents that do this.  For 

> instance,

> http://www.outback.com/pressroom/pdf/restaurantnews_march2005.pdf shows 

> that the Page Scaling can be turned off on the Print dialog.

> 

> Any help is greatly appreciated.

> 

> Thanks,

> 

> Kevin at booksys.com

.......
well it didn't turn out too hard. I added this at the end of canvas

	def setViewerPreference(self,pref,value):
		'''set one of the allowed entries in the documents viewer preferences'''
		catalog = self._doc.Catalog
		VP = getattr(catalog,'ViewerPreferences',None)
		if VP is None:
			from reportlab.pdfbase.pdfdoc import PDFDictionary
			VP = catalog.ViewerPreferences = PDFDictionary()
		VP[pref] = value

	def getViewerPreference(self,pref):
		'''you'll get an error here if none have been set'''
		return self._doc.Catalog.ViewerPreferences[pref]

	def delViewerPreference(self,pref):
		'''you'll get an error here if none have been set'''
		del self._doc.Catalog.ViewerPreferences[pref]

The we can use the PrintScaling entry like

canvas.setViewerPreference('PrintScaling',PDFName('None'))


It seems all the entries in ViewerPreferences are names so perhaps we can agree 
to eliminate the callers use of PDFName.
-- 
Robin Becker
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