%
% A HyperNeWS Menu
%
% NOTE: altough ClassMenuCanvas is a  subclass of ClassTrackingCanvas it 
% does NOT use any of the tracking functionality. It could also be a subclass
% of ClassCanvas.
%

ClassMenu pop % load ClassMenu


/ClassMenuCanvas ClassTrackingCanvas []
classbegin
/menuprocess 	null def
/Menuable?	true def
/onmenu		nullproc def

/MenuStart {	% posname event -- posname event menu? boolean
	{
		currentprocess /ProcessName (HyperNeWS menu handler) put
		currentprocess /track_evt 3 -1 roll put
		currentprocess /menuok true put
		clear {onmenu} stopped pop
		currentprocess /menuok undef
		currentprocess /track_evt undef
	} fork {
		pause dup /State get dup /breakpoint eq {
			pop /menuprocess 1 index promote
			3 -1 roll pop dup /menuposname get 3 1 roll
			/menumenu get true 
			exit
		} if
		/runnable ne {pop false exit} if
	} loop
} def

/MenuStop {	% menu --
	pop menuprocess null ne {
		menuprocess /State get /breakpoint eq {
			menuprocess continueprocess
		} if
		/menuprocess unpromote
	} if
} def
classend def