Description of the need
This request arose from #3292. The solution proposed there by @bugfolder alters to the core radio/checkbox widget form used for displaying the taxonomy term widget. But there was discussion about the possibility of adding a #indentation
property to make this feature available to all checkbox and radio elements beyond the taxonomy term widget.
Proposed solution
Adding a #indentation
property that would further theme the element using theme_indentation()
. This function adds <div>
elements with css class indentation
to create indentation.
The new #indentation
property would take an integer >= 0.
Alternatives that have been considered
The alternative is to manually add indentations to the #options
values before outputting the form element. This is the current solution used in #3292.
Alternatively, it may be possible to add different css classes to each element depending on their depths. This was an earlier approach in #3292, but it was cumbersome, as it required the creation of several css classes, one for each level.
I will try to provide a PR later today.
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