TreeView custom sort?

[Matt Maier]

Do you need the user to be able to interact with each named object
individually through the TreeView widget? If not, maybe you can just
replace the single object name with a list of all relevant objects in your
preferred sort order. You'd still get a hierarchy of groups that way. You
could just "open" the list in a list field to address an individual object.

On Sat, Dec 10, 2016 at 10:33 AM, Richard Gaskin <ambassador at fourthworld.com
> wrote:

> Tore Nilsen wrote:
>
> > Could you build the initial array with the object names as keys, add
> > the layer numbers as part of the information you store about each
> > element,  then sort the array by layer numbers and set the array of
> > the tree view widget to the sorted array?
>
> Ah, but arrays aren't sortable per se.
>
> We can sort the keys of an array, but what we're doing there is sorting a
> delimited chunk.
>
> Associative arrays have no internal representation of order, so no matter
> what I do with the keys the array itself will remain a hash table of
> unpredictable order.
>
> I could prepend the top-level array key with a number, but this has two
> drawbacks:
>
> 1. Not being purely numeric, it can only sort alphabetically, producing
> things like this:
>
>     1 First item
>     11 Eleventh item
>     2 Second item
>
> 2. I'd prefer not to have the numbers visible to the user at all, since
> they would be just an artifice used for sorting and have no semantic
> meaning in my UI.
>
> If the TreeView offered options for using custom sort functions that might
> work well, esp. if I could alter keys as it goes so I could remove the
> numeric portion.  But at the moment I don't believe it does.
>
>
> --
>  Richard Gaskin
>  Fourth World Systems
>  Software Design and Development for the Desktop, Mobile, and the Web
>  ____________________________________________________________________
>  Ambassador at FourthWorld.com                http://www.FourthWorld.com
>
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