1 ! Copyright (C) 2006, 2009 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors math.vectors classes.tuple math.rectangles colors
4 kernel sequences models opengl math math.order namespaces
5 ui.commands ui.gestures ui.render ui.gadgets
6 ui.gadgets.labels ui.gadgets.scrollers
7 ui.gadgets.presentations ui.gadgets.viewports ui.gadgets.packs
11 TUPLE: list < pack index presenter color hook ;
13 : list-theme ( list -- list )
14 selection-color >>color ; inline
16 : <list> ( hook presenter model -- gadget )
26 : calc-bounded-index ( n list -- m )
27 control-value length 1- min 0 max ;
29 : bound-index ( list -- )
30 dup index>> over calc-bounded-index >>index drop ;
32 : list-presentation-hook ( list -- quot )
33 hook>> [ [ list? ] find-parent ] prepend ;
35 : <list-presentation> ( hook elt presenter -- gadget )
36 keep [ >label text-theme ] dip
40 : <list-items> ( list -- seq )
41 [ list-presentation-hook ]
45 [ 2dup ] dip swap <list-presentation>
51 dup <list-items> add-gadgets
54 : selected-rect ( list -- rect )
55 dup index>> swap children>> ?nth ;
67 M: list focusable-child* drop t ;
69 : list-value ( list -- object )
70 dup index>> swap control-value ?nth ;
72 : scroll>selected ( list -- )
73 #! We change the rectangle's width to zero to avoid
75 [ selected-rect rect-bounds { 0 1 } v* <rect> ] keep
78 : list-empty? ( list -- ? ) control-value empty? ;
80 : select-index ( n list -- )
84 tuck control-value length rem >>index
85 [ relayout-1 ] [ scroll>selected ] bi
88 : select-previous ( list -- )
89 [ index>> 1- ] keep select-index ;
91 : select-next ( list -- )
92 [ index>> 1+ ] keep select-index ;
94 : invoke-value-action ( list -- )
98 [ index>> ] keep nth-gadget invoke-secondary
101 : select-gadget ( gadget list -- )
102 tuck children>> index
103 [ swap select-index ] [ drop ] if* ;
105 : clamp-loc ( point max -- point )
108 : select-at ( point list -- )
109 [ dim>> clamp-loc ] keep
113 : list-page ( list vec -- )
114 [ dup selected-rect rect-bounds 2 v/n v+ over visible-dim ] dip
115 v* v+ swap select-at ;
117 : list-page-up ( list -- ) { 0 -1 } list-page ;
119 : list-page-down ( list -- ) { 0 1 } list-page ;
121 list "keyboard-navigation" "Lists can be navigated from the keyboard." {
122 { T{ button-down } request-focus }
123 { T{ key-down f f "UP" } select-previous }
124 { T{ key-down f f "DOWN" } select-next }
125 { T{ key-down f f "PAGE_UP" } list-page-up }
126 { T{ key-down f f "PAGE_DOWN" } list-page-down }
127 { T{ key-down f f "RET" } invoke-value-action }