Support checkboxes for categories like in QGIS

[ninsbl]

QGIS provides check-boxes for layers with category style, which allows to toogle single categories of the layer on or off. If possible, it would be very convenient if LWC would support these checkboxes too. The only alternative to achieve this would be to load each category as an individual layer. But that would be relatively cumbersome for layers with many categories...

[mfangain]

+1!
Hiding or displaying some category style is really missing to Lizmap.
Duplicate layers is troublesome when displaying or editing data.

Thanks.

[igeofr]

+1.
I am also interested in adding this feature.

[Mavialle]

+1, it would be awesome !

[bgisb]

+1, it would be helpful. Thank you in advance.

[josemvm]

+1

[igeofr]

Clearly, the improvement I am most looking forward to as it will reduce the number of layers in my projects.
Thanks.

[rldhont]

To quickly implement this feature, we can use SLD, but SLD is not well supported by QGIS and it is the lowest common style denominator. Complex styles can't be described in SLD.

To develop this feature, we will need to develop some thing in QGIS server with plugin or internally to easyly filtering rendering with style expressions.

[igeofr]

@rldhont Thank you for the clarification.

[arthuragone]

This feature would be an absolute winner. Most needed with some layer when you have 50+ categories.

[jaitor1]

+1

[Gustry]

Quick teaser for only people having notification here : it's done
Visible with some screenshots on #3793 but the work is mainly in #3656

[gioman]

Quick teaser for only people having notification here : it's done
Visible on #3793 but the work is mainly in #3656

@Gustry @rldhont huge improvement, many thanks to all.

[Gustry]

@Gustry @rldhont huge improvement, many thanks to all.

I did nothing, it's @nboisteault ;-)

[Gustry]

Thanks to funders about this feature : Tenergie, Calvados and Le Grand Narbonne