Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uwm.edu!bionet!apple!greggor
From: greggor@Apple.COM (Greg L. Anderson)
Newsgroups: comp.sys.mac.hypercard
Subject: Re: Object Graphics (QUERY)
Message-ID: <44657@apple.Apple.COM>
Date: 10 Sep 90 16:31:17 GMT
References: <8731@latcs1.oz.au>
Organization: Apple Computer Inc., Cupertino, CA
Lines: 27

In article <8731@latcs1.oz.au> jacob@latcs1.oz.au (Jacob L. Cybulski) writes:
>Is there any public or commercial utility to organise a set of MacDraw-like
>tools allowing the construction of Hypercard cards of movable graphical
>objects. Preferably, the objects would behave as HC buttons and have
>scripts attached.

I have written an XCMD polygon button handler for HC 1.2.5 that does about
half of what you want.  The polygons are all transparant autohilite--drawing
non-transparant objects on a hypercard card is not feasible, as there is no
easy way to give your XCMD's update events.  Tail-patching WaitNextEvent
would work--if tail-patching in general worked, which it doesn't.  If anyone
has any ideas about drawing on HC's card in non-XOR mode, I'd like to hear
them too.

My XCMD detects clicks on the polybuttons by intercepting mouseDown events
on the card or bg layer, building a region for each polybutton, and checking
PtInRegion to find hits.  This process is actually pretty fast--it takes
about 20 ticks from the mousedown event until the time the polybutton's script
takes control.

If anyone is interested in this XCMD, I might clean it up and post it.
Some manual setup is required.
-- 
  ___\    /___               Greg Anderson              ___\    /___ 
  \   \  /   /         Advanced Technology Group        \   \  /   /
   \  /\/\  /            Apple Computer,  Inc.           \  /\/\  /
    \/    \/               greggor@apple.com              \/    \/