: <jamshred-gadget> ( jamshred -- gadget )
jamshred-gadget new swap >>jamshred ;
-: default-width ( -- x ) 800 ;
-: default-height ( -- y ) 600 ;
+CONSTANT: default-width 800
+CONSTANT: default-height 600
M: jamshred-gadget pref-dim*
drop default-width default-height 2array ;