Path: utzoo!attcan!uunet!lll-winken!xanth!ames!mailrus!tut.cis.ohio-state.edu!bloom-beacon!NUSVM.BITNET!ISSLCK
From: ISSLCK@NUSVM.BITNET (Law Chee Keong)
Newsgroups: comp.windows.x
Subject: SETTING SUB RESOURCES FOR NON-WIDGETS
Message-ID: <8901310942.AA08004@ATHENA.MIT.EDU>
Date: 2 Feb 89 19:15:42 GMT
Sender: daemon@bloom-beacon.MIT.EDU
Organization: The Internet
Lines: 24


Question for Xt experts:

I have a widget which has non widget data.
In order to set values for the resources for the non widget data, I
understand that I need to call XtSetSubvalues through my set_values_hook
proc of my widget.

But the problem lies in this:
How will my non widget data tell which of its resources has been set and
changed and which has not. For example, say if a Color resource was changed,
the non widget data would need to update private fields (GC fields) that are
derived from this Color resource.
But unlike the set_values proc where I have current, request and new widgets
to compare those fields that are changed and not changed, the set_values_hook
proc does not have a copy of my original widget data to allow me to make the
comparisions. So, I don't know how to update derived fields.

I am certain there is a way of doing this, (maybe an obvious way). But I
just can't figure out how. Any help on this is greatly appreciated!!

-- C.K. Law
-- Institute of Systems Science
-- National University of Singapore