[QGIS-Developer] Discussing default snapping and node editing settings

[Denis Rouzaud]

Hi all,

Another idea would be to add a new mode 'All layers but the remote ones'.

Anyway, I agree that default mode should be 'current layer'.
Actually, we just miss a new option in main settings to define the default
mode (there is already the default type).

Denis

Le mer. 12 sept. 2018 à 12:11, Régis Haubourg <regis.haubourg at gmail.com> a
écrit :

> Hi,
> +1 !
> However, I see lots of customers switching to the "Snap all layer"
> settings, "because it is simpler". And then they face very slow snapping
> index creation issues.
> In the QWAT project, we have been thinking of exposing the indexing
> strategies in the UI of the advanced snapping.
>
> see here:
> https://qgis.org/api/classQgsSnappingUtils.html#a2ea7577667b94657e14f63ba7dd0bf07
> ----------------------------
> IndexAlwaysFull
>
> For all layers build index of full extent. Uses more memory, but queries
> are faster.
> IndexNeverFull
>
> For all layers only create temporary indexes of small extent. Low memory
> usage, slower queries.
> IndexHybrid
>
> For "big" layers using IndexNeverFull, for the rest IndexAlwaysFull.
> Compromise between speed and memory usage.
> IndexExtent
>
> For all layer build index of extent given in map settings.
> --------------
>
>
>
> And for WFS and any other cached provider, we may probably add some
> exceptions to the global strategy to avoid fetching the remote datasource
> by default. Using the local cache is better. However, when doing WFS
> editing, this start to look like a can of worms.
>
>
> Le mer. 12 sept. 2018 à 16:58, Andreas Neumann <a.neumann at carto.net> a
> écrit :
>
>> Hi,
>>
>> I noticed that by default QGIS is set to edit ALL layers and also snaps
>> to ALL layer by default. I do think that this is a bad default setting,
>> esp. with larger projects.
>>
>> We had issues because users had WFS layers in their project (read only,
>> as reference) and QGIS tries to index these WFS layers and to get their
>> vertices in order to snap to them. Then QGIS hangs and freezes and there
>> are network time outs. Apparently one has to kill QGIS using the task
>> manager.
>>
>> I think the better default is to edit and snap only in the active layer
>> by default.
>>
>> Opinions?
>>
>> Andreas
>> _______________________________________________
>> QGIS-Developer mailing list
>> QGIS-Developer at lists.osgeo.org
>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer
>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
>
> _______________________________________________
> QGIS-Developer mailing list
> QGIS-Developer at lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer
> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer

-- 

Denis Rouzaud
denis at opengis.ch  <denis at opengis.ch>
+41 76 370 21 22
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-developer/attachments/20180912/4fafd8b5/attachment.html>