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charts.lines: add scale-chunks

char-rename
Alexander Iljin 2017-01-20 03:45:47 +03:00 committed by John Benediktsson
parent 22413dfa58
commit 8658ec83fc
1 changed files with 23 additions and 4 deletions
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27
lines/lines.factor
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@ -214,6 +214,22 @@ SYMBOL: elt
! value' = (value - min) / (max - min) * width ! value' = (value - min) / (max - min) * width
: scale ( width value max min -- value' ) neg [ + ] curry bi@ / * ; : scale ( width value max min -- value' ) neg [ + ] curry bi@ / * ;
! Return quotation that can be used in map operation.
: scale-mapper ( width min,max -- quot: ( value -- value' ) )
first2 swap '[ _ swap _ _ scale ] ; inline
! Sometimes no scaling is needed.
! : scale-mapper ( width min,max -- quot: ( value -- value' ) )
! first2 swap 3dup - = [
! 3drop [ ]
! ] [
! '[ _ swap _ _ scale ]
! ] if ; inline
: scale-chunks ( chunks xwidth xmin,xmax yheight ymin,ymax -- chunks' )
scale-mapper [ scale-mapper ] dip swap
'[ [ first2 @ swap @ swap 2array ] map ] map ;
PRIVATE> PRIVATE>
: draw-line ( seq -- ) : draw-line ( seq -- )
@ -233,9 +249,12 @@ PRIVATE>
] if ; ] if ;
M: line draw-gadget* M: line draw-gadget*
dup parent>> dup chart? [ dup parent>> dup chart? [| line chart |
chart-axes swap chart chart-axes
[ color>> gl-color ] [ data>> ] bi line [ color>> gl-color ] [ data>> ] bi
dupd clip-data swap second [ drawable-chunks ] keep dupd clip-data swap second [ drawable-chunks ] keep
flip-y-axis [ [ draw-line ] each ] unless-empty flip-y-axis
chart chart-dim first2 [ chart chart-axes first2 ] dip swap
scale-chunks
[ [ draw-line ] each ] unless-empty
] [ 2drop ] if ; ] [ 2drop ] if ;