Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!rutgers!cbmvax!peter
From: peter@cbmvax.commodore.com (Peter Cherna)
Newsgroups: comp.sys.amiga.programmer
Subject: Re: Clicking on irregular shapes?
Message-ID: <20181@cbmvax.commodore.com>
Date: 28 Mar 91 15:39:05 GMT
References: <1991Mar27.212214.6204@orfeo.radig.de> <2710@sirius.ucs.adelaide.edu.au>
Reply-To: peter@cbmvax.commodore.com (Peter Cherna)
Organization: Commodore, West Chester, PA
Lines: 34

In article <2710@sirius.ucs.adelaide.edu.au> jpotter@ucs.adelaide.edu.au (Jonathan Potter) writes:
>For a BOOLGADGET, specify SpecialInfo as pointing to a BoolInfo
>structure, and fill in the Mask variable in the BoolInfo structure. This allows
>you to specify a mask that details the shape for selecting/unselecting of the
>gadget.

That works, provided that the rectangular extents of the gadget overlap.
In other words, using masked boolean gadgets, you can do this:

 _______      _______
|       \    \       |
|        \    \      |
|         \    \     |
|         /    /     |
|        /    /      |
|_______/    /_______|

But not this:
   _______  _______
  |       \\       |
  |        \\      |
  |         \\     |
  |         //     |
  |        //      |
  |_______//_______|

>| Jonathan Potter  |                             | Life is like a piece of   |

     Peter
--
Peter Cherna, Operating Systems Development Group, Commodore-Amiga, Inc.
{uunet|rutgers}!cbmvax!peter    peter@cbmvax.commodore.com
My opinions do not necessarily represent the opinions of my employer.
"If all you have is a hammer, everything looks like a nail."