[Qgis-developer] arrows on line strings?

Tim Sutton tim at linfiniti.com
Thu Jan 31 12:27:28 EST 2008

Hi Stefanie

Its been requested a few times but thus far no one has had time to
implement it. To add it would require adding a bit of logic in
qgsvectorlayer to overdraw an arrow onto a line once it has been
renderered (Qt doesnt provide any flow style line styles). Magnus
Homann has just done similar work for point symbols. If you would like
to do this work yourself it would be most welcome and we can certainly
try to help as needed. Others may be interested to help so do let us
know if you plan to start such work - it will also help to prevent
duplication of effort.

Best regards


2008/1/31, Stefanie Tellex <stefie10 at media.mit.edu>:
> Hi,
> I would like to draw arrows on line strings, since they represent
> movement vectors and I want to show the direction of movement.  I
> couldn't find any way to do that in the gui or any obvious way in the
> programmatic API.  What's the best way to add this feature or is it
> there already somewhere?
> Thanks,
> Stefanie
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Tim Sutton
QGIS Project Steering Committee Member - Release  Manager
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