Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!texbell!uhnix1!hermes.cs.uh.edu!matt
From: matt@hermes.cs.uh.edu
Newsgroups: comp.sys.mac.programmer
Subject: drawing a polygon w/the mouse
Message-ID: <34046@uhnix1.uh.edu>
Date: 2 Aug 90 01:55:57 GMT
Sender: nntppost@uhnix1.uh.edu
Reply-To: matt@hermes.cs.uh.edu ()
Organization: University of Houston
Lines: 19

Hi.  Does anyone have any pointers to some sample code on how to let the user
draw a polygon in the manner of MacDraw? (i.e. click to start the polygon,
rubberband the line, click for the next vertex, etc., and double-click to
stop.)

I've got the rubberbanding down, but I'm having a bit of a hard time detecting
the double-click to signify the end.  My current, inelegant approach is
to say delay(GetDblTime, tix) and then see if there's a mouse down event in
the queue after each new vertex is created.  Pretty cheesy, huh?

Another thing I was wondering -- I'm using an xor transfer mode, but I
noticed that apparently programs like HyperCard don't.  How do they make it
so you can rubberband a solid line and not wipe out the rest of the screen?

Thanks for any help you can send my way.

-------------------------------------------------------------------------------
Matt Emerson
matt@cs.uh.edu