[reportlab-users] About a bug in barcodes

[Germán M. Bravo]

Barcodes always show a stroke no matter what (even a very small one)
...that makes some printers print a nasty stoke that messes up the
barcode. Rects built for barcodes should not have a stroke at all by
default, but setting a StrokeColor makes reportlab drawing shapes add
a stroke anyway.

(In the eanbc.py for instance, around line 260), where it calls:
Rect(..., strokeColor=barFillColor), it should call Rect(...,
strokeColor=barStrokeColor) instead, and barStrokeColor should come
from self.barStrokeColor that being None by default, instead of
colors.black. That single bug makes my barcodes all messy. Below is a
patch to fix eanbc.py.

------- PATCH FOLLOWS CUT HERE --------
--- reportlab/graphics/barcode/eanbc.py	2010-08-08 10:37:45.000000000 -0500
+++ reportlab/graphics/barcode/eanbc.py	2010-08-31 14:19:30.000000000 -0500
@@ -179,7 +179,8 @@
             }
     fontSize = 8        #millimeters
     fontName = 'Helvetica'
-    textColor = barFillColor = barStrokeColor = colors.black
+    textColor = barFillColor = colors.black
+    barStrokeColor = None # Needs to be None for the render not to
show any stroke at all
     barStrokeWidth = 0
     x = 0
     y = 0
@@ -243,6 +244,7 @@
         fontSize = self.fontSize
         barFillColor = self.barFillColor
         barStrokeWidth = self.barStrokeWidth
+        barStrokeColor = self.barStrokeColor

         fth = fontSize*1.2
         b = ''.join(b)
@@ -255,7 +257,7 @@
                 if lrect and lrect.y==yh:
                     lrect.width += barWidth
                 else:
-                    lrect =
Rect(x,yh,barWidth,barHeight-dh,fillColor=barFillColor,strokeWidth=barStrokeWidth,strokeColor=barFillColor)
+                    lrect =
Rect(x,yh,barWidth,barHeight-dh,fillColor=barFillColor,strokeWidth=barStrokeWidth,strokeColor=barStrokeColor)
                     gAdd(lrect)
             else:
                 lrect = None
------- PATCH ENDS CUT HERE --------