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Re: EVENT_PRO [message #73770 is a reply to message #40935]

Mon, 29 November 2010 11:02

silje
Messages: 4
Registered: October 2010

Junior Member

On 29 Nov, 19:38, David Fanning <n...@dfanning.com> wrote:
> silje writes:
>> Changing the names to something more meaningful shouldn't be any
>> problem :) But it still feels like an easy solution. I also found this
>> in a previous discussion
>
>> "If you do use EVENT_PRO to assign an event handler for a top-level
>> base being directly managed by XMANAGER, you will find exceedingly
>> strange things going on in your widget program, if it works at all.
>> Believe me, you don't want to do this. "
>
>> http://www.dfanning.com/widget_tips/multiple_widgets.html
>
>> Could you explain what you meant by that?
>
> In the old days, a widget that was being directly managed
> by XManager (ie, the widget ID used in the XManager call)
> could not be assigned an event handler with either EVENT_PRO
> or EVENT_FUNC keywords. Rather, you had to assign an
> event handler to this widget with the EVENT_HANDLER keyword
> to XManager.
>
> I still follow this rule in my own widget programs because,
> well ..., because I'm old school. :-)
>
> I believe this requirement is no longer in effect, although
> I haven't really tested it. I just see a lot of programs
> written by ITTVIS that assign the top-level base an event
> handler using the EVENT_PRO keyword. So I presume this
> restriction is no longer valid.
>
> You could test it and let me know. :-)
>
> Cheers,
>
> David
>
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming:http://www.dfanning.com/
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")

I have created many separate event handlers using EVENT_PRO and it
works just fine :) I was just a little nervous it was bad
programming..... ;)

Silje

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[Message index]

		event_pro for compound widgets By: Benjamin Hornberger on Tue, 07 September 2004 10:32
		Re: EVENT_PRO By: David Fanning on Mon, 29 November 2010 11:40
		Re: EVENT_PRO By: David Fanning on Mon, 29 November 2010 11:09
		Re: EVENT_PRO By: silje on Mon, 29 November 2010 11:02
		Re: EVENT_PRO By: David Fanning on Mon, 29 November 2010 11:02
		Re: EVENT_PRO By: Paul Van Delst[1] on Mon, 29 November 2010 10:43
		Re: EVENT_PRO By: David Fanning on Mon, 29 November 2010 10:38
		Re: EVENT_PRO By: silje on Mon, 29 November 2010 09:22
		Re: EVENT_PRO By: David Fanning on Mon, 29 November 2010 08:46

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