diff --git a/contrib/slate.factor b/contrib/slate.factor
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+! Copyright (C) 2006 Eduardo Cavazos.
+
+USING: kernel namespaces sequences vectors opengl gadgets ;
+
+IN: slate
+
+TUPLE: slate action ;
+
+C: slate ( -- <slate> ) dup delegate>gadget [ ] over set-slate-action ;
+
+M: slate pref-dim* ( <slate> -- ) drop { 100 100 0 } ;
+
+SYMBOL: self
+
+M: slate draw-gadget* ( <slate> -- ) dup self set slate-action call ;
+
+: get-action ( -- quot ) self get slate-action ;
+
+: set-action ( quot -- ) self get set-slate-action ;
+
+: flush-slate ( -- ) self get relayout-1 ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: rect-width ( <rect> -- width ) 0 swap rect-dim nth ;
+
+: rect-height ( <rect> -- height ) 1 swap rect-dim nth ;
+
+: window-width ( -- width ) self get rect-width ;
+
+: window-height ( -- height ) self get rect-height ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+SYMBOL: dlist
+
+SYMBOL: capacity
+
+: reset-dlist ( -- ) capacity get <vector> dlist set ;
+
+: add-dlist ( quot -- ) dlist get swap nappend ;
+
+: flush-dlist ( -- ) get-action dlist get append set-action reset-dlist ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: set-coordinates ( left right bottom top -- )
+[ glLoadIdentity gluOrtho2D ] curry curry curry curry add-dlist ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: black ( -- color ) { 0 0 0 1 } ;
+
+: white ( -- color ) { 1 1 1 1 } ;
+
+: red ( -- color ) { 1 0 0 1 } ;
+
+: green ( -- color ) { 0 1 0 1 } ;
+
+: blue ( -- color ) { 0 0 1 1 } ;
+
+: set-clear-color ( color -- ) [ first4 glClearColor ] curry add-dlist ;
+
+: clear-window ( -- ) [ GL_COLOR_BUFFER_BIT glClear ] add-dlist ;
+
+: set-color ( color -- ) [ first4 glColor4f ] curry add-dlist ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: (draw-point) ( { x y } -- ) GL_POINTS glBegin first2 glVertex2f glEnd ;
+
+: draw-point ( { x y } -- ) [ (draw-point) ] curry add-dlist ;
+
+: (draw-line) ( a b -- )
+GL_LINES glBegin first2 glVertex2f first2 glVertex2f glEnd ;
+
+: draw-line ( a b -- ) [ (draw-line) ] curry curry add-dlist ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: reset-slate ( -- ) [ ] set-action reset-dlist ;
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