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From: thomas%utah-gr@UTAH-CS.ARPA (Spencer W. Thomas)
Newsgroups: mod.computers.apollo
Subject: Re: [munnari!cheops.OZ!tony@seismo.CSS.GOV: pop up menus]
Message-ID: <8609061651.AA10239@utah-gr.ARPA>
Date: Sat, 6-Sep-86 12:51:34 EDT
Article-I.D.: utah-gr.8609061651.AA10239
Posted: Sat Sep  6 12:51:34 1986
Date-Received: Sat, 6-Sep-86 22:01:07 EDT
References: <8609010732.6434@mulga.OZ>
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: utah-gr!thomas (Spencer W. Thomas)
Organization: University of Utah CS Dept
Lines: 51
Approved: apollo@yale-comix.arpa


Here are the commands that I have been using to create a "pop-up" menu.
The menu is stored in ~mouse/menu, and contains lines of the form 
	word: dm commands
It causes the dm commands to be executed at the location the mouse
button was originally pushed.  The actions performed are:
	* On mouse down, grab the current cursor position, 
	* pop up the menu window at that position,
	* the user then positions the cursor on the desired command and
	  releases the mouse
	* grab the corresponding DM command
	* hide the menu
	* stuff  the command into the cmd window and
	* execute it.

Here is the code, grabbed from my key_defs file.  It may need some
quoting in spots, I'm not sure.  There is some special casing for a 19L
display (the (613,788) to get to the DM output window, in particular).
I have commented this using # comments, you will want to delete them.

on the mouse down:
=; 				# echo current loc in DM output window
(613,788); tr;dr;		# move there
\X:\;xc where; 			# grab all stuff at X:
tdm; xp where;			# stuff it into command window for editing
ed;ed;ed;			# delete X:
es '(';				# insert open paren for position spec
/Y:/;ed;ed;ed;			# find and delete Y:
tr;es ')';			# stick close paren at end of posn
dr; tl; xc where;		# grab position string
				# insert command to pop mouse window
es 'wi -i ~mouse/menu; wi -w ~mouse/menu;pt;tt;tl; dr;';
tr; es ';wm';			# and move it to cursor loc
en				# execute generated command

On the mouse up:
tl; /:/;			# find the end of the menu label
ar; dr; tr; xc menu;		# grab the dm commands
tl;				# restore horizontal scroll
wi -i ~mouse/menu;		# hide the menu
tdm; xp where; tr;es ';';	# insert positioning command into cmd window
xp menu; tr; en			# insert and execute menu command

This is pretty slow, and if you "tickle" the mouse button, you get ahead
of the DM and cause all sorts of trouble.  If you are using a larger
font (than f5x9), the command that the mouse down inserts will overflow
the command window, and you will need to scroll the command window left
at some point in the sequence.  I finally gave up on using it.

-- 
=Spencer   ({ihnp4,decvax}!utah-cs!thomas, thomas@utah-cs.ARPA)