[REBOL] Showing list faces

From: carl::cybercraft::co::nz at: 12-Oct-2001 9:43

How do you "show" an individual face in a list?  For instance, the
following will change the colours of one of the boxes in a list when
the button's pressed, but it uses "show box-list", which updates the
whole list.  How do I update just the box with the changed colour?
(I'm assuming this would be faster on large and complex lists.)

colors: reduce [red green blue yellow]
len: length? colors
view layout [box-list: list 200x100 [box 200x25] supply [
        if (count <= len) [face/color: pick colors count]
    ]
    button "Change" [
        change at colors random len random 255.255.255
        show box-list
    ]
]

--
Carl Read

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