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From: lanzo@wgate.UUCP (Mark Lanzo)
Newsgroups: comp.windows.x.motif
Subject: Re: Problem changing symbol pixmap for MessageBox widget
Message-ID: <191@atesysv.UUCP>
Date: 10 Jun 91 18:03:14 GMT
References: <187@atesysv.UUCP> <WEBB.91Jun7151121@firefox.cow.melco.co.jp>
Reply-To: lanzo@atesysv.UUCP (Mark Lanzo)
Organization: Wandel & Goltermann Technologies, Inc.
Lines: 35

In a prior article webb@cow.melco.co.jp (webb) wrote:
    
 >  I think that your problem could be your XtSetValues, and XtGetValues.
 >  These functions both take 3 parameters. Your program only passes 2
 >  parameters, the widget, and ARGS. You must also specify the number of
 >  args as the 3rd parameter.

Sigh.  I suppose I should have gone ahead and shown the macro def's.
As the old adage goes "assumption is the mother of all screwups." :-)
At any rate, my def's actually look like:

    #define 	MAX_WIDGET_ARGS	16
    #define	ARGS			WidgetArgs, WidgetArgCount
    #define	ARGLIST_RESET()		WidgetArgCount = 0
    #define	ARGLIST_ADD(tag,value) 					\
		(XtSetArg(WidgetArgs[WidgetArgCount],tag,value),	\
		WidgetArgCount++)
    Arg 	WidgetArgs[MAX_WIDGET_ARGS];
    Cardinal	WidgetArgCount;

So as you can see, the "ARGS" macro expands to two actual arguments.

 >  Also you said that you wanted to use the foreground and background
 >  colours of the text in the dialog box, so maybe you should use:
 >    XtGetValues(label, ARGS, num_args);
 >  instead of XtGetValues(dialog, ARGS) which you have now.
    
I *did* try to get the colors from the label.  
They come back as fg=bg=0.  I suspect this is because a label gadget is
used in the message-box widget, rather than a label widget.
It seems like it would have made more sense for XtGetValues to have 
returned the fg & bg colors for the parent window containing the label, 
but it doesn't appear to work that way.  At any rate, the fg/bg colors
for the message-box widget should have been the same as that used for the
text;  I just used the generic "*foreground" resource and didn't specify
different colors for specific components of the message-box.