58 lines
1.5 KiB
Factor
58 lines
1.5 KiB
Factor
! Copyright (C) 2005, 2009 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: io kernel math namespaces math.vectors ui.gadgets
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ui.gadgets.private ui.gadgets.packs accessors
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math.rectangles combinators ;
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IN: ui.gadgets.incremental
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TUPLE: incremental < pack cursor ;
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: <incremental> ( -- incremental )
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incremental new
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vertical >>orientation
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{ 0 0 } >>cursor ;
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M: incremental pref-dim*
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dup layout-state>> [
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dup call-next-method >>cursor
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] when cursor>> ;
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: next-cursor ( gadget incremental -- cursor )
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[
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[ dim>> ] [ cursor>> ] bi*
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[ vmax ] [ v+ ] 2bi
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] keep orientation>> set-axis ;
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: update-cursor ( gadget incremental -- )
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[ nip ] [ next-cursor ] 2bi >>cursor drop ;
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: incremental-loc ( gadget incremental -- )
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[ cursor>> ] [ orientation>> ] bi v*
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>>loc drop ;
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: prefer-incremental ( gadget -- )
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dup forget-pref-dim dup pref-dim >>dim drop ;
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M: incremental dim-changed drop ;
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: add-incremental ( gadget incremental -- )
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not-in-layout
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2dup (add-gadget)
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t in-layout? [
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{
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[ drop prefer-incremental ]
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[ drop layout-later ]
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[ incremental-loc ]
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[ update-cursor ]
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[ nip prefer-incremental ]
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[ nip parent>> [ invalidate* ] when* ]
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} 2cleave
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] with-variable ;
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: clear-incremental ( incremental -- )
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not-in-layout
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[ (clear-gadget) ]
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[ forget-pref-dim ]
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[ { 0 0 } >>cursor parent>> [ relayout ] when* ]
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tri ;
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