[reportlab-users] WYSIWYG with reportlab and pygtk

[Robin Becker]

Tobias Ceglarek wrote:

> hello,

> 

> my goal is to create a little tool to interactively produce simple

> documents with the principle of "What You See Is What You Get".

> 

> 1. the user interface i have implemented with pygtk:

> 

> there is a textview connected to a textbuffer with a fonttag:

> 

>   size:

>     myTextView.set_size_request(298,210) # = 10.5*cm,7.4*cm

> 

>   font:

>     myFontTag.set_property("font","Century Schoolbook L 10")

> 

> 2. i register a type-1 font and use it within a paragraphstyle

> 

>   folder = '/usr/share/fonts/type1/gsfonts/'

>   afmFile = folder + 'c059013l.afm'

>   pfbFile = folder + 'c059013l.pfb'

>   justFace = pdfmetrics.EmbeddedType1Face(afmFile, pfbFile)

>   faceName = 'CenturySchL-Roma' # pulled from AFM file

>   pdfmetrics.registerTypeFace(justFace)

>   justFont = pdfmetrics.Font('CenturySchL-Roma', faceName,

> 'WinAnsiEncoding')

>   pdfmetrics.registerFont(justFont)

> 

>   ...

> 

>   docPagesize = (10.5*cm,7.4*cm)

> 

>   ...

> 

>   style1 = ParagraphStyle(

>     "VorderseiteStyle",

>     fontName="CenturySchL-Roma",

>     fontSize=10,

>     #leading=16,

>     leftIndent=0,

>     rightIndent=0,

>     firstLineIndent=0,

>     alignment=TA_CENTER,

>     spaceBefore=0,

>     spaceAfter=0,

>     bulletFontName="CenturySchL-Roma",

>     bulletFontSize=10,

>     bulletIndent=0,

>     textColor=black,

>     backColor=None

>   )

> 

> the effect is the same font (in the user interface and the pdf output).

> but the fonts have not exactly the same size and/or spaces between words

> and/or letters.

> 

> i would be glad if anyone can help me or just give a hint.

> 

> perhaps my attempt is wrong/too complicated - how would you make a

> simple wysiwyg document?

> 

> regards,

> 

> prinz igor

> 

.......
well I suppose we're in the area of what 10 means. Have you measured the 
length of a string on the screen and compared what 
reportlab.pdfmetrics.stringWidth says about the same string. Type 1 
fonts are supposed to be sized in termos of a 1000 point box. I'm not 
exactly sure what

myFontTag.set_property("font","Century Schoolbook L 10")

is supposed to do, but I suspect the outcome may depend on 1) whether 
the 10 implies points or pixels & 2) what the dpi is for the screen.

The implication is that there should be a constant scale factor bwteen 
what reportlab/pdf thinks a string width should be and how your graphics 
framework draws it. If the 10 is pixels and not points then a 72 point 
widestring will become dpi pixels wide where dpi is probably 96.
-- 
Robin Becker