[QGIS-Developer] UX of Raster Legend in the QGIS Layers Panel

[Alessandro Pasotti]

Hi Niklas,

thank you for your ideas, why don't you file an "enhancement" ticket on
github so that people can discuss it there?

Attaching a few mockups about your proposed changes would also be helpful.

Kind regards.



On Fri, Jun 7, 2024 at 9:12 AM Niklas Alt via QGIS-Developer <
qgis-developer at lists.osgeo.org> wrote:

> Dear QGIS Developers,
>
> I am a long time user, first time subscriber to this list. I am active
> though for some years within the local
> OSGeo Chapter of Germany FOSSGIS (and the QGIS user group), so some
> people on the list might be able
> to put a face on this message.
>
> I am always expressing my gratitude to the QGIS dev-community in
> personal, so let me start with a big thank you.
> I have been using QGIS for the last 10 years and our community has come
> a long way.
>
> Now to my issue: A few versions back QGIS has started to expand raster
> files with a legend, once they are
> added to the layer-panel. We are working mostly with georeferenced
> historical maps, so for the most part
> the maps are simple RGB files with transparency. And often we add dozens
> of maps which make up a city.
> Leading to long lists of expanded legends informing about the fact that
> all maps are made up of RGB color bands.
>
> Additionaly we are relying on the opacity slider, which can be added to
> the layer tree, allowing for a convenient
> way to control the opacity of the added maps. However the slider is only
> visible when the map is expanded in the layer-panel.
>
> I have posted a while back on mastodon and have added some images for
> illustrative purposes:
>
> https://fedihum.org/@oshistory/111821429135997460
>
> Perhaps the following alterations might be considered for an improved UX:
>
>   - new raster layers are collapsed by default (users who need to
> inspect the legend can toggle it)
>   - users can decided if they want the legend to  be displayed. This
> could for instance be set within the Legend
>     Tab of the Layer Properties panel. In fact, there already is an
> option to use a placeholder, maybe a simple boolean
>     checkbox could serve as a graphical control item
>   - maybe the legend and other UI Elements (like the mentioned opacity
> slider) could be seperated.
>
> Best Wishes,
>
> Niklas Alt, Marburg, Germany
>
>
> --
> Niklas Alt  Wiss. MA. Hessisches Institut für Landesgeschichte
> Wilhelm-Röpke-Str. 6C 35032 Marburg fon +49 (0)6421 28-91759 fax -24799
>
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> unterhttps://hlgl.hessen.de/datenschutzhinweise
>
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-- 
Alessandro Pasotti
QCooperative:  www.qcooperative.net
ItOpen:   www.itopen.it
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