Stephane Raynaud wrote:
> I think that "collection._alpha = self.alpha" (or something better)
> are missing in ContoutSet.__init__, because _alpha from collections
> (Line or Poly) overrides the alpha value the color of
> "collection.set_color(color)" found in method "changed" of ContourSet.
> Therefore, alpha doesn't work for contours (filled or not).
> Nota: If "collection.set_alpha" is used, it fails with line contouring
> because self._edgecolors is an empty list.
> I hope it can help.
It did help, thank you. I have fixed this in svn, rev 5051.