1 ! Copyright (C) 2006, 2009 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: kernel accessors math namespaces opengl opengl.gl
4 sequences math.vectors ui.pens ui.gadgets ui.gadgets.grids
5 ui.gadgets.grids.private ui.render math.rectangles
6 fry locals arrays assocs ;
7 IN: ui.gadgets.grid-lines
9 TUPLE: grid-lines color ;
11 C: <grid-lines> grid-lines
15 :: (compute-grid-lines) ( grid n ns orientation -- seq )
17 ns n suffix gap orientation v. '[ _ - orientation n*v ] map
18 dup grid dim>> gap v- orientation reverse [ v* ] keep '[ _ _ v+ v+ ] map
19 [ [ gap [ 2/ ] map v+ ] map ] bi@ zip ;
21 : compute-grid-lines ( grid -- lines )
23 [ accumulate-cell-xs horizontal (compute-grid-lines) ]
24 [ accumulate-cell-ys vertical (compute-grid-lines) ]
29 M: grid-lines draw-boundary
30 color>> gl-color compute-grid-lines [ first2 gl-line ] each ;