1 ! Copyright (C) 2006, 2008 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors io kernel math namespaces
4 sequences words math.vectors ui.gadgets ui.gadgets.packs
5 math.geometry.rect fry ;
9 TUPLE: track < pack sizes ;
11 : normalized-sizes ( track -- seq )
12 sizes>> dup sift sum '[ dup [ _ / ] when ] map ;
14 : init-track ( track -- track )
19 : new-track ( orientation class -- track )
24 : <track> ( orientation -- track ) track new-track ;
26 : alloted-dim ( track -- dim )
27 [ children>> ] [ sizes>> ] bi { 0 0 }
28 [ [ drop { 0 0 } ] [ pref-dim ] if v+ ] 2reduce ;
30 : available-dim ( track -- dim ) [ dim>> ] [ alloted-dim ] bi v- ;
32 : track-layout ( track -- sizes )
33 [ available-dim ] [ children>> ] [ normalized-sizes ] tri
34 [ [ over n*v ] [ pref-dim ] ?if ] 2map nip ;
36 M: track layout* ( track -- ) dup track-layout pack-layout ;
38 : track-pref-dims-1 ( track -- dim ) children>> pref-dims max-dim ;
40 : track-pref-dims-2 ( track -- dim )
41 [ children>> pref-dims ] [ normalized-sizes ] bi
42 [ [ v/n ] when* ] 2map
46 M: track pref-dim* ( gadget -- dim )
48 [ [ alloted-dim ] [ track-pref-dims-2 ] bi v+ ]
53 : track-add ( track gadget constraint -- track )
54 pick sizes>> push add-gadget ;
56 : track-remove ( track gadget -- track )
59 [ swap children>> index ]
60 [ unparent sizes>> ] 2bi
66 : clear-track ( track -- ) V{ } clone >>sizes clear-gadget ;