Dear Axel,
looking at rdkit/Chem/Draw/cairoCanvas.py it appears that the
DrawingOptions.dash parameter is ignored and dash is hardcoded to (3, 3).
Please apply the following changes if you wish the DrawingOptions.dash
to be honoured:
---
./third-party/Python/lib/python3.6/site-packages/rdkit/Chem/Draw/MolDrawing.py.orig
2019-03-26 15:05:54.371731743 +0000
+++
./third-party/Python/lib/python3.6/site-packages/rdkit/Chem/Draw/MolDrawing.py
2019-03-26 15:06:16.683144329 +0000
@@ -203,7 +203,7 @@
if not dash:
self.canvas.addCanvasPolygon(poly, color=color)
elif self.drawingOptions.wedgeDashedBonds and
self.canvas.addCanvasDashedWedge:
- self.canvas.addCanvasDashedWedge(poly[0], poly[1], poly[2],
color=color)
+ self.canvas.addCanvasDashedWedge(poly[0], poly[1], poly[2],
color=color, dash=dash)
else:
self.canvas.addCanvasLine(pos, nbrPos, linewidth=width * 2,
color=color, dashes=dash)
---
./third-party/Python/lib/python3.6/site-packages/rdkit/Chem/Draw/cairoCanvas.py.orig
2019-03-26 15:06:25.459913254 +0000
+++
./third-party/Python/lib/python3.6/site-packages/rdkit/Chem/Draw/cairoCanvas.py
2019-03-26 15:06:30.853771245 +0000
@@ -402,7 +402,7 @@
def addCanvasDashedWedge(self, p1, p2, p3, dash=(2, 2), color=(0, 0,
0), color2=None, **kwargs):
self.ctx.set_line_width(kwargs.get('linewidth', 1))
self.ctx.set_source_rgb(*color)
- dash = (3, 3)
+ #dash = (3, 3)
pts1 = self._getLinePoints(p1, p2, dash)
pts2 = self._getLinePoints(p1, p3, dash)
However, you might be disappointed as spacing between dashes may become
uneven (which is probably why spacing was hardcoded):
Cheers,
p.
On 03/26/19 11:20, Axel Pahl wrote:
Hi,
is there an option to set the spacing of the dashes in a downward
wedge bond using Draw.MolToImage()?
In the depiction I am currently getting (attached), the dashes are
very close to each other, I would like to increase the spacing.
Changing the values in the tuple `Draw.DrawingOptions.dash` does not
change the depiction for me.
Many thanks in advance.
Kind regards,
Axel
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