[Qgis-developer] Setting snapping settings via Python

[John Stevenson]

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()
snapper.setLayers([layer_config])
snapper.setSnapToMapMode(QgsSnappingUtils.SnapAdvanced)

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

Cheers
John


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

Hi,

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.

Cheers

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:

http://osgeo-org.1560.x6.nabble.com/getting-QgsMapCanvasSnapper-to-work-td4147067.html



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