29 lines
868 B
Factor
29 lines
868 B
Factor
! Copyright (C) 2006, 2009 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors assocs fry kernel locals math math.vectors
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opengl sequences ui.gadgets ui.gadgets.grids.private ui.pens ;
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IN: ui.gadgets.grid-lines
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TUPLE: grid-lines color ;
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C: <grid-lines> grid-lines
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<PRIVATE
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:: (compute-grid-lines) ( grid n ns orientation -- seq )
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grid gap>> :> gap
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ns n suffix gap orientation v. '[ _ - orientation n*v ] map
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dup grid dim>> gap v- orientation reverse v* '[ _ v+ ] map
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gap [ 2 /f ] map '[ [ _ v+ ] map ] bi@ zip ;
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: compute-grid-lines ( grid -- lines )
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dup <grid-layout>
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[ accumulate-cell-xs horizontal (compute-grid-lines) ]
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[ accumulate-cell-ys vertical (compute-grid-lines) ]
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2bi append ;
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PRIVATE>
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M: grid-lines draw-boundary
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color>> gl-color compute-grid-lines [ first2 gl-line ] each ;
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