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original commit: 9e31cb139de87623e9b006bee05ccc87da3c506e
This commit is contained in:
Robby Findler 2003-04-06 00:17:34 +00:00
parent 95bf680dc8
commit 2801b152ee
1 changed files with 5 additions and 4 deletions
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9
collects/framework/private/panel.ss
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@ -77,20 +77,21 @@
(list x y this-width this-height)))
l)))]
(inherit get-children)
(inherit get-children begin-container-sequence end-container-sequence)
[define current-active-child #f]
(public active-child)
[define active-child
(define/public active-child
(case-lambda
[() current-active-child]
[(x)
(unless (memq x (get-children))
(error 'active-child "got a panel that is not a child: ~e" x))
(unless (eq? x current-active-child)
(begin-container-sequence)
(for-each (lambda (x) (send x show #f))
(get-children))
(set! current-active-child x)
(send current-active-child show #t))])]
(send current-active-child show #t)
(end-container-sequence))]))
(super-instantiate ())))
(define single-window<%> (interface (single<%> window<%>)))