Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!snorkelwacker!bloom-beacon!ZIA.AOC.NRAO.EDU!cflatter
From: cflatter@ZIA.AOC.NRAO.EDU (Chris Flatters)
Newsgroups: comp.windows.x
Subject: Re: What's what in OPEN LOOK/OpenWindows (long)
Message-ID: <9009211805.AA08878@zia.aoc.nrao.edu>
Date: 21 Sep 90 18:05:57 GMT
Sender: root@athena.mit.edu (Wizard A. Root)
Organization: The Internet
Lines: 17

>>XView's foundation is similar to Xt in that they both provide a way to
>>do subclassing in C.  However, the implementation is significantly
>Is that foundation availble to non-toolkit writers who wish to add a
>"widget"?

The requirements for developing an XView package (which corresponds to
an object class) is documented --- see chapter 22 of Dan Heller's "XView
Programming Manual".  However you would write packages as a means of
extending the toolkit and not as a matter of routine application development.
XView programming is very different to programming using an Xt based
widget set.  This is probably not a bad thing.  I think that you can
start producing useful XView applications without the same level of
investment in learning the toolkit than is required for Xt plus widgets
-- the API is far less complex (this is, of course, a subjective judgement
and should be treated as such). 

		Chris Flatters