[Qgis-developer] Automate snapping after insert of a new feature

[G. Allegri]

Can't you use the the snapped point (QgsSnappingResult.snappedVertex) to
replace the original vertex position?

giovanni

2015-04-22 11:01 GMT+02:00 francescoboccacci at libero.it <
francescoboccacci at libero.it>:

> Hi all,
> i have a question for you. I'd like to have a new function in my plugin
> that makes an autime snapping if a start point or end point of a new
> feature inserted is closed to a vertex or segment base on a values setted
> ina configuration file.
> From plugin console:
>
> l = iface.activeLayer()  --activeLayer
> f = l.selectedFeatures()[0] -- new fetaure inserted
> start = f.geometry().asPolyline()[0] -- get the start point (the point
> that i would like to snap to a segment)
> result = l.snapWithContext(start,10,QgsSnapper.SnapToVertexAndSegment) --
> i use
> result
> (0, {0.0: [<qgis._core.QgsSnappingResult object at 0x0000000018B9C400>],
> 0.09699529788394015: [<qgis._core.QgsSnappingResult object at
> 0x0000000018B9C620>]})
>
> I notice that the key 0.09699529788394015 is the effective distance
> between my start point and the segment.
> My question is:
> How can i modify the feature geometry to snap to the segment according to
> result?
>
> Thanks
>
> Francesco
>
> _______________________________________________
> Qgis-developer mailing list
> Qgis-developer at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/qgis-developer
>



-- 
Giovanni Allegri
http://about.me/giovanniallegri
Gis3W - http://gis3w.it
Ikare - http://ikare.it
Twitter: https://twitter.com/_giohappy_
blog: http://blog.spaziogis.it
GEO+ geomatica in Italia http://bit.ly/GEOplus
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-developer/attachments/20150422/ba900cb1/attachment.html>