Path: utzoo!attcan!uunet!husc6!uwvax!astroatc!nicmad!hill
From: hill@nicmad.UUCP (Ray Hill)
Newsgroups: comp.windows.x
Subject: Xtk Resource Converters
Keywords: Xtk XtAddConverter
Message-ID: <2729@nicmad.UUCP>
Date: 24 May 88 21:45:12 GMT
Organization: Nicolet Instruments, Biomedical Division
Lines: 32


				X toolkit Experts:
				------------------

Where is the correct place to add resource converters? (ie. XtAddConverter)

I tried the "class_initialize" procedure for the widget that uses the new 
resource type but that is to late. I need the new resource type before creating
the first widget of this type. If I try to use the converter before creating the
first widget Xt warns: 

	"X Toolkit Warning: No type converter registered for ...".

Widgets created after the first one are allowed to use the converter without
problems through "XtConvert" . "XtSetValues" also works great by putting the
converted values exactly where they are wanted.

But telling our application programmers: "Always create a widget of this type
and then destroy it before creating any widgets you want to use" is not 
acceptable.

Xt is finding the resource converter when doing default resource stuff.
(ie. XtResources and app-defaults stuff) It works since this happens after the
"class_initialize" procedure has been called.

So far I haven't been able to get Xt to put the defaults into the "Rec" 
structure though. I know its calling the converter but I haven't found out where
its putting my results yet.  But hopefully that's a simple bug I track down.


					Ray Hill (hill@nicmad)
					(608) 271-3333  X-2103