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Re: EVENT_PRO [message #73775 is a reply to message #40935]

Mon, 29 November 2010 08:46

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

silje writes:

>
> Hey, I'm trying to structure my IDL program into several event
> handlers, e.g. one procedure that opens a file, one that save data
> etc. To do this I have used EVENT_PRO like this:
>
> PRO MotionControl
>
> tlb = WIDGET_BASE(column=1, title='MotionControl', tlb_frame_attr=1,
> MBAR=bar )
> file_menu = WIDGET_BUTTON(bar, VALUE='File', /MENU)
> file_bttn1 = WIDGET_BUTTON(file_menu, VALUE='Open dataset',
> UVALUE='OpenDat', EVENT_PRO = 'OpenData')
> file_bttn2 = WIDGET_BUTTON(file_menu, VALUE='Save dataset',
> UVALUE='SaveDat', EVENT_PRO = 'SaveData')
>
> ............................................................ ..........................
> etc
>
>
> WIDGET_CONTROL, tlb, /realize
> XMANAGER, 'MotionControl', tlb
>
> end
>
> In this way I have one event handler that is called
> MotionControl_event that takes care of all the events not handled by
> specified EVENT_PRO. I don't know if this is a really bad way of
> structuring my code, even though it does work. Can somebody give me
> some tips?

It is a perfectly OK way to structure your code,
although you will get in trouble sooner or later
with the names of these routines. I would read the
"How to Name Files" article again. :-)

http://www.dfanning.com/tips/namefiles.html

These event handlers should have names like
"MotionControl_SaveData" and "MotionControl_OpenData".

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.")

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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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