[Biopython] Sigil color SOLID instead of transparent

[Peter Cock]

Hi Asma,

Note that in addition to transparency, with ReportLab (and other
vector image tools), the z-order is important for the final display.

IIRC, the default sigil colors ARE solid (unless you explicitly use
a transparent color via a ReportLab color with alpha transparency
set).

If you look at the "Feature sigils" example in the Tutorial, the
black central track axis is always visible above the sigils
(including the BIGARROW), while the background (optional)
grey track is always at the back.

http://biopython.org/DIST/docs/tutorial/Tutorial.html
http://biopython.org/DIST/docs/tutorial/images/GD_sigils.png

Could you try to rephrase your question, or prepare an image
to illustrate what you want to achieve?

Thanks,

Peter

On Thu, Oct 2, 2014 at 7:58 PM, Asma Riyaz <asmariyaz23 at gmail.com> wrote:
> Hi
>
> I am using Genome Diagram to draw features on tracks, and I need to know if
> there is a way to make the sigil color solid instead of transparent. Since
> BIGARROW sigil is what I prefer the track line behind each feature is
> visible.
>
> Since colors for this module are derived from ReportLab, I tried to
> investigate if there is something that I can use, this is where I reached:
>
> from reportlab.pdfgen.canvas import Canvas
> c = Canvas(filename,pagesize=(400,200))
> c.drawString(25,180, 'solid')
>
> However to use this property 'solid', drawstring needs to be used which is a
> property of canvas.
>
> What can I do to over ride the default property of transparency for sigil
> colors? Any Inputs?
>
> Thanks,
> Asma
>
>
>
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