54 lines
1.7 KiB
Factor
54 lines
1.7 KiB
Factor
! Copyright (C) 2005, 2006 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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IN: gadgets-layouts
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USING: gadgets generic io kernel math namespaces ;
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! Incremental layout allows adding lines to panes to be O(1).
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! Note that incremental packs are distinct from ordinary packs
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! defined in layouts.factor, since you don't want all packs to
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! be incremental. In particular, incremental packs do not
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! support non-default values for pack-align, pack-fill and
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! pack-gap.
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! The cursor is the current size of the incremental pack.
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! New gadgets are added at cursor-cursor*gadget-orientation.
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TUPLE: incremental cursor ;
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C: incremental ( pack -- incremental )
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[ set-gadget-delegate ] keep
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dup delegate pref-dim over set-incremental-cursor ;
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M: incremental pref-dim* ( incremental -- dim )
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dup gadget-relayout? [
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dup delegate pref-dim over set-incremental-cursor
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] when incremental-cursor ;
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: next-cursor ( gadget incremental -- cursor )
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[
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swap rect-dim swap incremental-cursor
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2dup v+ >r vmax r>
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] keep gadget-orientation set-axis ;
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: update-cursor ( gadget incremental -- )
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[ next-cursor ] keep set-incremental-cursor ;
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: incremental-loc ( gadget incremental -- )
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dup incremental-cursor swap gadget-orientation v*
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swap set-rect-loc ;
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: prefer-incremental ( gadget -- )
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dup forget-pref-dim dup pref-dim over set-rect-dim layout ;
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: add-incremental ( gadget incremental -- )
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2dup (add-gadget)
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over prefer-incremental
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2dup incremental-loc
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tuck update-cursor
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prefer-incremental ;
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: clear-incremental ( incremental -- )
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dup (clear-gadget) dup forget-pref-dim
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{ 0 0 0 } over set-incremental-cursor
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gadget-parent [ relayout ] when* ;
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