inconsistent/confusing behaviour regarding selectable raster layer

[Andreas Janz]

The user should only see a raster layer inside a QgsMapLayerComboBox, if the layer is displayed inside a map view.

In the following setup, there is no map view, but the outClassification layer is selectable. At the same time, the example dataset layers aren’t selectable, which is confusing.

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The outClassification layer was created by this PA:

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[Benjamin Jakimow]

Which layers are visible in the QGIS Layer Tree at the same time?

[Andreas Janz]

Ah, I see, the layer is also opened inside the QGIS Layers Panel.

That is wrong behaviour, right?

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[Benjamin Jakimow]

Isn't it what you expect when using the QGIS Processing Framework?

[Andreas Janz]

Maybe, let’s discuss this with Sebastian next meeting.

Can you control this behaviour or would it be difficult to prevent opening the layer by QGIS?

[Benjamin Jakimow]

As layers from the PF might be created by other PF algorithms as well, I don’t see - at this time - a way to differentiate outputs created from the enmapbox or other places.
However, maybe it is possible to differentiate this via the https://qgis.org/api/classQgsProcessingContext.html.