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From: rlh2@ukc.ac.uk (R.L.Hesketh)
Newsgroups: comp.windows.x
Subject: Re: Question regarding XtGetResourceList & XtGetConstraintResourceList
Message-ID: <472@elder.ukc.ac.uk>
Date: 9 May 91 07:28:00 GMT
References: <MONTNARO.91May8095931@spyder.crd.ge.com>
Reply-To: rlh2@ukc.ac.uk (Richard Hesketh)
Organization: Computing Lab, University of Kent at Canterbury, UK.
Lines: 26

In article <MONTNARO.91May8095931@spyder.crd.ge.com> montanaro@crdgw1.ge.com (Skip Montanaro) writes:
>    XtGetResourceList(XtClass(instance->id), &resources, &count);

>The function always returns the widget-specific data back, as opposed to the
>class-specific data. How does XtGetResourceList know what the widget id is,
>since it's getting a WidgetClass as input, not a Widget?

I'd be extremely surprised if it did!  You are getting back the
class-specific data .. by this I think you mean the default_type and
default_address?   These will be correct for the WidgetClass given.
The resource value of a particular widget instance may indeed have the
same value as that returned by XtGetResourceList but this is because it
has been created with the class default value.

>    XtGetConstraintResourceList(XtClass(instance->id), &resources, &count);
>
>It always sets resources to NULL, even if the widget specified by
>instance->id is a child of an XmForm widget. Am I calling it incorrectly?

No you must give it the Class of the constraint parent, i.e.

     if (XtParent(instance->id) != NULL)
	     XtGetConstraintResourceList(XtClass(XtParent(instance->id)),
							 &resources, &count);

Richard