Path: utzoo!attcan!uunet!lll-winken!lll-tis!helios.ee.lbl.gov!pasteur!shambhala.Berkeley.EDU!ricks
From: ricks@shambhala.Berkeley.EDU (Rick L Spickelmier)
Newsgroups: comp.windows.x
Subject: XtTextInvalidate and the toolkit
Message-ID: <7724@pasteur.Berkeley.EDU>
Date: 23 Nov 88 21:18:31 GMT
Sender: news@pasteur.Berkeley.EDU
Lines: 29


I have been trying to use XtTextInvalidate.  Whenever I use it I
end up back in main (i.e. call a null function pointer).  I took
a look at XtTextInvalidate and it does call a function pointer:

void XtTextInvalidate(w, from, to)
    Widget	    w;
    XtTextPosition from,to;
{
    TextWidget ctx = (TextWidget) w;

        ctx->text.lastPos = (*ctx->text.source->GetLastPos)(ctx->text.source);
        _XtTextPrepareToUpdate(ctx);
        _XtTextNeedsUpdating(ctx, from, to);
        ForceBuildLineTable(ctx);
        _XtTextExecuteUpdate(ctx);
}


and sure enough, I can not find any place in the toolkit where
GetLastPos is set.  There is a define 'GETLASTPOS' which looks
like it should do the right thing...

Am I missing something or is there a bug in the 'source' creation
routines that does not initialize the GetLastPos field?

			
			Rick Spickelmier
			UC Berkeley
			ricks@berkeley.edu