[Qgis-developer] Reliable way to determine a groupIndex in the legend tree

[Nyall Dawson]

>
> Personally, I am also interested in enhancing group options in the layer
> tree. Groups are not just stupid containers with only toggling of
> visibility. They could also have a group opacity and blending and group
> metadata. Later on we may also have clipping and masking on groups. So
> we really should have an extensible mechanism for groups as new group
> features appear.
>

One thing I'd love to see is the ability to make the layers in a group
"mutually exclusive". (ie, imagine radio buttons instead of checkboxes for
controlling the visibility of layers within that group). I find I'm often
going through a process of switching one layer on, then switching a bunch
of other layers off for comparison purposes. A mutually exclusive layer
group which automatically switched the other child layers off when I select
a layer would make this process much nicer!

Nyall
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