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From: kit@EXPO.LCS.MIT.EDU (Chris D. Peterson)
Newsgroups: comp.windows.x
Subject: Re: Notification of a selection in an AsciiText (Athena) widget
Message-ID: <9005082013.AA02091@expo.lcs.mit.edu>
Date: 8 May 90 20:13:40 GMT
References: <3075@goanna.oz.au>
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 39


> Is it possible to have a client notified of a selection in an AsciiText widget?

Yes.

> If so, how would it be done?

Read on :-)

> I do not want to change the translations as the default ones do exactly what
> I want and I would have to include much of the same code in my action
> function. 

You actually do what to change the translations, you need to add a new action
routine that is called when there is a valid selection.  This action routine can
be bound to the same events that trigger the selection.  Thus you would modify
your translation table to look like this.

<Btn1Up>:	extend-end(PRIMARY, CUT_BUFFER0) NotifyNewSelection()\n\
<Btn3Up>:	extend-end(PRIMARY, CUT_BUFFER0) NotifyNewSelection()\

You may have to build some smarts into the NotifyNewSelection routine if you
do not want to be notified when the selection is removed (done by clicking
button 1 without dragging).

> I thought about looking up the default translations in the source code
> and then setting up my own translation that includes the default actions
> plus my own but I could not find an obvious declaration of the
> defaultTranslations for the AsciiText widget.

The default translations are in the file TextTr.c


						Chris D. Peterson     
						MIT X Consortium 

Net:	 kit@expo.lcs.mit.edu
Phone:   (617) 253 - 9608	
Address: MIT - Room NE43-213