Re: [QGIS-Developer] Processing plugin - Set style on resulting layer

[Jakob Lanstorp]

My bad ...

Actually I was not using the output.getVectorWriter object the correct way.
After fixing it the layer extracting from postgis by uri resulted in the
default layer style from postgis to be add automatically using the
getVectorWriter of the processing.core.outputs.OutputVector object.

If would still be smart if one could have an after processAlgorithm signal
for setting other stuff like adding feature count in TOC.

Jakob



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Re: [QGIS-Developer] Processing plugin - Set style on resulting layer

[Jakob Lanstorp]

Yes, I would like to control the styling from my processing plugin code not
by context menu. The end user is not to worry about where to find a qml
style file.

Jakob



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Re: [QGIS-Developer] Processing plugin - Set style on resulting layer

[Nyall Dawson]

On 5 January 2018 at 17:34, Alexander Bruy  wrote:
> Processing allows to define styles for outpus on the per-algorithm basis.
> Just open algorithm context menu by right-clicking on it and select "Edit
> rendering styles for outputs". In the dialog you can assign styles for each
> algorithm output. These styles will be applied to outputs automatically
> after algorithm execution.
>
> Hope this helps.

That works for a user, but I think Jakob is after a way for an
algorithm to define a style which is always used for the output for
that algorithm.

Is this correct?

Nyall
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Re: [QGIS-Developer] Processing plugin - Set style on resulting layer

[Alexander Bruy]

Processing allows to define styles for outpus on the per-algorithm basis.
Just open algorithm context menu by right-clicking on it and select "Edit
rendering styles for outputs". In the dialog you can assign styles for each
algorithm output. These styles will be applied to outputs automatically
after algorithm execution.

Hope this helps.

2018-01-05 3:49 GMT+02:00 Nyall Dawson :
> On 3 January 2018 at 23:59, Jakob Lanstorp  wrote:
>> I'm building a Processing plugin used as an interface between QGIS and a
>> geological PostGIS database.
>>
>> The resulting layer is as standard loaded automatically (Processing best
>> practices). This resulting load (shapefile) happens after method
>> processAlgorithm of GeoAlgorithm has run.
>>
>> This gives me no chance of setting the resulting layer style. Is there any
>> post-processingAlgorithm method or anything else I can use? I'm aware of
>> "qgis:setstyleforvectorlayer" but my script is not meant for the modeller
>> and would like the algorithm to be run in one step not two steps.
>>
>> I may be out of scoop for what a Processing plugin is meant for - but like
>> the non ui and direct algorithm approach.
>>
>
> I don't believe this is possible in 2.x, nor currently in 3.0 either.
> BUT - the API has changed significantly in 3.0 and could be expanded
> to allow for this type of approach in future 3.x releases.
>
> Nyall
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Re: [QGIS-Developer] Processing plugin - Set style on resulting layer

[Nyall Dawson]

On 3 January 2018 at 23:59, Jakob Lanstorp  wrote:
> I'm building a Processing plugin used as an interface between QGIS and a
> geological PostGIS database.
>
> The resulting layer is as standard loaded automatically (Processing best
> practices). This resulting load (shapefile) happens after method
> processAlgorithm of GeoAlgorithm has run.
>
> This gives me no chance of setting the resulting layer style. Is there any
> post-processingAlgorithm method or anything else I can use? I'm aware of
> "qgis:setstyleforvectorlayer" but my script is not meant for the modeller
> and would like the algorithm to be run in one step not two steps.
>
> I may be out of scoop for what a Processing plugin is meant for - but like
> the non ui and direct algorithm approach.
>

I don't believe this is possible in 2.x, nor currently in 3.0 either.
BUT - the API has changed significantly in 3.0 and could be expanded
to allow for this type of approach in future 3.x releases.

Nyall
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[QGIS-Developer] Processing plugin - Set style on resulting layer

[Jakob Lanstorp]

I'm building a Processing plugin used as an interface between QGIS and a
geological PostGIS database. 

The resulting layer is as standard loaded automatically (Processing best
practices). This resulting load (shapefile) happens after method
processAlgorithm of GeoAlgorithm has run. 

This gives me no chance of setting the resulting layer style. Is there any
post-processingAlgorithm method or anything else I can use? I'm aware of
"qgis:setstyleforvectorlayer" but my script is not meant for the modeller
and would like the algorithm to be run in one step not two steps. 

I may be out of scoop for what a Processing plugin is meant for - but like
the non ui and direct algorithm approach.

Jakob




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Jakob Lanstorp
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