[reportlab-users] Size of Barcodes in Reportlab

[Tim Roberts]

Jürgen Geuter wrote:

> Hello.

>

> I am trying to generate barcodes with reportlab and it works quite well:

> ---- example code -----

> from reportlab.pdfgen import canvas

> from reportlab.lib.pagesizes import A4,landscape

> from reportlab.graphics.barcode import code39

> from reportlab.lib.units import mm

>

> c = canvas.Canvas("/tmp/barcode.pdf", pagesize=landscape(A4))

> barcode = code39.Extended39("123456")

> barcode.drawOn(c,100*mm,100*mm)

>

> c.showpage()

> c.save()

> ---------------------------

>

> This draws a correct barcode to the position I wanted it printed, but

> it's too small. The barcode's size is not influenced by the font or the

> current line width, I tried setting the "height" and "width" attributes

> of my barcode before calling "drawOn". Nothing would change the

> barcode's size


Use the source, Luke.  ;)

The Extended39 constructor accepts a "barWidth" parameter that specifies
the base width of the smallest element.  It defaults to .0075 inch.

-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.