[Qgis-developer] Setting snapping settings via Python

John Stevenson john.stevenson at thinkwhere.com
Fri Jan 22 03:57:55 PST 2016

Thanks for help so far.

These suggestions seem to be more complicated than I require.  I do not need to use the snapper to modify geometries in a custom tool, just to turn snapping on for the current layer when the user begins editing it.  I tried the following, based on Etienne's inasafe example, but nothing happens:

layer = canvas.layer(0)
point_locator = QgsPointLocator(layer)
units = QgsTolerance.LayerUnits
layer_config = QgsSnappingUtils.LayerConfig(layer, point_locator.Types(), 50, units)
snapper = QgsSnappingUtils()

Is there another snapper already created by QGIS when editing begins that I can access?


John Stevenson
Senior Developer

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From: Qgis-developer [qgis-developer-bounces at lists.osgeo.org] on behalf of Thomas Gratier [osgeo.mailinglist at gmail.com]
Sent: 21 January 2016 11:04
To: Tom Chadwin
Cc: qgis-developer
Subject: Re: [Qgis-developer] Setting snapping settings via Python


I'm maybe wrong but you'd better look at QgsSnappingUtils http://qgis.org/api/classQgsSnappingUtils.html
It seems more simple and should do the job for you.


Thomas Gratier

2016-01-20 20:32 GMT+01:00 Tom Chadwin <tom.chadwin at nnpa.org.uk<mailto:tom.chadwin at nnpa.org.uk>>:
This old thread might also help:


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