Custom Status Values for ItemSelector (NCurses part)

[shundhammer]

Trello

https://trello.com/c/dcDDFwGy/1405-5-allow-additional-status-values-in-multiitemselector

Description

NCurses implementation for the CustomStatusItemSelector and greatly improved keyboard input handling for all variants of the ItemSelector.

Screenshot

Details

Input Handling

• The cursor keys scroll by items, not by lines.

• The End key scrolls to the last item, not to the last line.

• For scrolling by line there are vi-like key combinations: j, k.

• PgDn and PgUp scroll by a page full of lines.

• Space and Return cycle through the possible status values.

• + selects an item and moves to the next one.

• - deselects an item and moves to the next one.

• In custom status mode, both + and - check if that status transition is allowed according to the custom status definitions; i.e. if the custom status nextStatus field of the current status (whatever that is right now) is 1 for + or 0 for -.

  That makes it possible to still use + and - just like in a plain ItemSelector if the status transitions 0 -> 1 and 1 -> 0 are defined; or even n -> 0 for custom status #n. That way the - key can be made to work even with a custom status install because it's recommended to move directly to 0 (don't install) if the custom status transitions are set up that way.

Other Stuff

A SingleItemSelector will automatically make the selected item (if there is one) the current item and scroll to that position.

That does not affect the MultiItemSelector or the CustomStatusItemSelector.

[wfeldt]

lgtm