factor/library/ui/hierarchy.factor

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! Copyright (C) 2005, 2006 Slava Pestov.
! See http://factorcode.org/license.txt for BSD license.
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IN: gadgets
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USING: generic hashtables kernel math namespaces sequences
vectors words ;
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GENERIC: graft* ( gadget -- )
M: gadget graft* drop ;
: graft ( gadget -- )
t over set-gadget-grafted?
dup graft*
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[ graft ] each-child ;
GENERIC: ungraft* ( gadget -- )
M: gadget ungraft* drop ;
: ungraft ( gadget -- )
dup gadget-grafted? [
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dup [ ungraft ] each-child
dup ungraft*
f over set-gadget-grafted?
] when drop ;
: (unparent) ( gadget -- )
dup ungraft
dup forget-pref-dim f swap set-gadget-parent ;
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: unparent ( gadget -- )
[
dup gadget-parent dup [
over (unparent)
[ gadget-children delete ] keep relayout
] [
2drop
] if
] when* ;
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: (clear-gadget) ( gadget -- )
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dup [ (unparent) ] each-child f swap set-gadget-children ;
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: clear-gadget ( gadget -- )
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dup (clear-gadget) relayout ;
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: ((add-gadget)) ( gadget box -- )
[ gadget-children ?push ] keep set-gadget-children ;
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: (add-gadget) ( gadget box -- )
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over unparent
dup pick set-gadget-parent
[ ((add-gadget)) ] 2keep
gadget-grafted? [ graft ] [ drop ] if ;
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: add-gadget ( gadget parent -- )
#! Add a gadget to a parent gadget.
[ (add-gadget) ] keep relayout ;
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: add-gadgets ( seq parent -- )
#! Add all gadgets in a sequence to a parent gadget.
swap [ over (add-gadget) ] each relayout ;
: add-spec ( { quot setter post loc } quot -- )
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[
over first %
over second [ [ dup gadget get ] % , ] when*
over third %
[ gadget get ] %
swap fourth ,
%
] [ ] make call ;
: (parents) ( gadget -- )
[ dup , gadget-parent (parents) ] when* ;
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: parents ( gadget -- vector )
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#! A list of all parents of the gadget, the first element
#! is the gadget itself.
[ (parents) ] { } make ;
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: each-parent ( gadget quot -- ? )
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>r parents r> all? ; inline
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: find-parent ( gadget quot -- gadget )
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>r parents r> find nip ; inline
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: screen-loc ( gadget -- point )
#! The position of the gadget on the screen.
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parents { 0 0 } [ rect-loc v+ ] reduce ;
: relative-loc ( g1 point -- point-g1 ) swap screen-loc v- ;
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: child? ( parent child -- ? ) parents memq? ;
GENERIC: focusable-child* ( gadget -- gadget/t )
M: gadget focusable-child* drop t ;
: focusable-child ( gadget -- gadget )
dup focusable-child*
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dup t eq? [ drop ] [ nip focusable-child ] if ;
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: make-pile ( children -- pack ) <pile> [ add-gadgets ] keep ;
: make-shelf ( children -- pack ) <shelf> [ add-gadgets ] keep ;