Re: [Tile-dev] treeview hidden columns

[Bryan O. <oa...@ba...>]

Joe English wrote:
> I can think of a couple solutions: (a) Extend the "-show" option
> with a third option; "-show {tree headings columns}" would be the
> new default value, and "-show tree" (or "-show {tree headings}")
> would hide all columns; or (b) make -displaycolumns have a NULL
> default value, interpret NULL as "show all columns" and the empty
> list as "show no columns".

Brainstorming here...

* make the special case of "-displaycolumns {#0}" mean "only show the 
tree column, not the data columns".

* treat {} as null, {<whitespace>} as an empty list. So, I could do 
"-displaycolumns { }" to get the empty list.

* allow the special cases of #all to mean "all data columns" and #none 
to mean "no data columns". The default of "-display columns {}" is 
synonymous with "-displaycolumns #all" for backward compatibility, or it 
could be synonymous with "#none" if we can eschew backwards 
compatibility if favor of something that seems a tad more logical.