[wp-trac] [WordPress Trac] #25408: Ability to specify that a list table column is "primary"

[WordPress Trac]

#25408: Ability to specify that a list table column is "primary"
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 Reporter:  helen                              |       Owner:  stephdau
     Type:  enhancement                        |      Status:  assigned
 Priority:  normal                             |   Milestone:  4.3
Component:  Administration                     |     Version:
 Severity:  normal                             |  Resolution:
 Keywords:  has-patch needs-testing 4.1-early  |     Focuses:
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Comment (by stephdau):

 @helen: Kept running with [attachment:25408.3.diff], as discussed on
 Slack, but it never got to dealing how a primary column is actually
 selected/changed. The user-level setting of primary column sounds like it
 should be a screen option paired with the current "Show on screen" one
 (lists shown/hidden columns when dealing with a list table).

 This is where things get a bit complex.
  * "Show on screen" is in `wp-admin/includes/screen.php`
  * That's JS-enabled so that what the user selects is rendered live
  * Assuming the selection of the primary column would be a drop-down
 (preferred because of interactions below) or series of radio (meh,
 considering we list columns as checkboxes above) underneath that list of
 displayed columns
  * We have to select the default in initial page load
  * Then, if a user hides a column, it should be taken away from the
 primary columns list, live, and said list revert to its default (some
 special columns can't be hidden).
  * Should be added back, live, if unhidden.
  * In an ideal world, user shouldn't have to "apply" primary column
 change, it should be live too

 What's your (and others') perspective on this?

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Ticket URL: <https://core.trac.wordpress.org/ticket/25408#comment:17>
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