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From: fgreco@govt.shearson.COM (Frank Greco)
Newsgroups: comp.windows.x
Subject: Re: Help with XView`s PANEL_LIST
Message-ID: <9101231625.AA03709@fis1.shearson.com>
Date: 23 Jan 91 16:25:43 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 29

> 
> > 1.  I'm xv_create(ing) a PANEL_LIST.  Whenever I insert or delete items,
> >it appears as if OW redraws the entire list.  This causes a "flashing"
> >that is very annoying (especially since I update the list frequently).
> >I'm hoping that there is a way around this... Any clues?
> 
>  
> I got this function from the net. Original author is not knowned. It sets the
> contents of a scrolling list from a list of string in an argc-style parameter.
>  
> Since it update the entire list at once, there is no "flashing" for each 
> insert or delete. (There is only 1 re-draw of the list).
> 
>src follows...


	This works only if the number of attributes passed to xv_set()
	is less than 250 (value of ATTR_STANDARD_SIZE).  For more than
	that (eg, loading the list from a database where you don't
	know a priori the size of the list) you would have to either
	batch groups of xv_set()'s or, punt and "turn show off, load
	the list and then turn show back on".

	How about adding PANEL_LIST_STRINGLIST to a new version of XView
	that accepted a null-terminated list of char *?  It would be
	free from the ATTR_STANDARD_SIZE limitation.


	Frank G.