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+%D \module
+%D   [       file=meta-nav,
+%D        version=2003.03.28,
+%D          title=\METAPOST\ Graphics,
+%D       subtitle=Navigational Graphics,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA / Hans Hagen \& Ton Otten}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\startuniqueMPgraphic{navplus}{size,color,type,mode}
+  color c ; numeric s, t ; path p ;
+  t := \MPvar{type} ; c := \MPvar{color} ; s := \MPvar{size} ;
+  if \MPvar{mode} = 1 : c := .5[c,white] fi ;
+  if    t = 1 :
+    p := ((0,0)--(1/2,0)--(1,1/3)--(1,1)--(0,1)--(0,0)--cycle)
+      xyscaled (3,4) ;
+  elseif t = 2 :
+    p := ((0,0)--(1,0)--(1,1)--(0,1)--(1/2,2/5)--(1,1)--(0,1)--cycle)
+      xyscaled (4,3) ;
+  else :
+    p := fullsquare xyscaled (3,3) ;
+  fi ;
+  draw p withpen pencircle scaled (1/2) withcolor .75white ;
+  fill p withcolor c ;
+  draw p withpen pencircle scaled (1/3) withcolor .5c ;
+  currentpicture := currentpicture scaled s ;
+  currentpicture := currentpicture shifted -center currentpicture ;
+\stopuniqueMPgraphic
+
+\setupMPvariables
+  [navplus]
+  [size=1ex,
+   color=black,
+   type=1,
+   mode=0]
+
+\definepalet
+  [navplus]
+  [attach=darkred,
+   comment=darkblue]
+
+\definesymbol
+  [comment-normal]
+  [\uniqueMPgraphic{navplus}{type=1,color=navplus:comment}]
+\definesymbol
+  [comment-down]
+  [\uniqueMPgraphic{navplus}{type=1,color=navplus:comment,mode=1}]
+
+\definesymbol
+  [attach-normal]
+  [\uniqueMPgraphic{navplus}{type=2,color=navplus:attach}]
+\definesymbol
+  [attach-down]
+  [\uniqueMPgraphic{navplus}{type=2,color=navplus:attach,mode=1}]
+
+\unprotect
+
+\setupcomment    [\c!symbol={comment-normal,comment-down}]
+\setupattachments[\c!symbol={attach-normal,attach-down}]
+
+\protect \endinput