[reportlab-users] renderSVG & PolyLine
Sun, 07 Sep 2003 10:37:55 +0200
I had little trouble with Polylines and SVG representations:
Polylines will be rendered always with black fill color. (I think that
black was the last fill color before the Polyline was actually drawn?)
I looked at Shapes.py and found the Polylines should never be filled.
I looked at renderSVG.py and found that LINE_STYLES have always a fill
style. (Maybe this is correct for solid shapes only ?)
I set the fill explicit to None now in renderSVG.SVGCanvas.polyLine()
After that the black fill has gone away, but I expected lines of
stroke-width 1. They come out with stroke-width 0.125 which I set
elsewhere in the code before.
Setting stroke-width by hand to 1 doesn't changed anything, so I set
stroke-width to 1.1 and got my finally result.
Since this changes are hardcoded it is no good solution, but maybe
someone can have a solution for the real bug ?
def polyLine(self, points):
assert len(points) >= 1, 'Polyline must have 1 or more points'
if self._strokeColor != None:
pairs = 
for i in xrange(len(points)):
pairs.append("%f %f" % (points[i]))
pts = string.join(pairs, ', ')
self.setFillColor(None) # set fill to 'none'
self.setLineWidth(1.1) # need to set stroke-width
greater than 1 ???
polyline = transformNode(self.doc, "polyline",
points=pts, style=self._formatStyle(LINE_STYLES)) #
this includes fill style ???