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Re: How to retrieve information from an event to use it in another event? [message #54635 is a reply to message #54489]

Tue, 19 June 2007 20:49

Michael Galloy
Messages: 1114
Registered: April 2006

Senior Member

On Jun 19, 10:54 am, hradilv <hrad...@yahoo.com> wrote:
> make an info structure in your "main" program like:
> info = {fid1:(-1), fid2:(-1), nb1:0L, nb2:0L .. etc }
> make a pointer to that
> infoptr = ptr_new(info)

Don't forget to save the pointer in the tlb's UVALUE:

widget_control, tlb, set_uvalue=infoptr

> in your event function put:
> widget_control, event.top, get_uvalue=infoptr
>
> Then you can look use (*infoptr).fid1, etc...

Yes, this is the basic idea most people use when writing widget
programs. Save information in fields of a structure that is stored
(either directly or via a pointer) in the top-level base's UVALUE.
If you use a pointer, be sure to free the pointer when the program
finishes (use the CLEANUP keyword to XMANAGER).

Mike
--
www.michaelgalloy.com

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[Message index]

		Re: How to retrieve information from an event to use it in another event? By: Vince Hradil on Tue, 19 June 2007 09:54
		Re: How to retrieve information from an event to use it in another event? By: aleks.franca@gmail.co on Tue, 19 June 2007 09:34
		Re: How to retrieve information from an event to use it in another event? By: Paul Van Delst[1] on Tue, 19 June 2007 07:55
		Re: How to retrieve information from an event to use it in another event? By: Vince Hradil on Tue, 19 June 2007 07:11
		Re: How to retrieve information from an event to use it in another event? By: aleks.franca@gmail.co on Tue, 19 June 2007 06:55
		Re: How to retrieve information from an event to use it in another event? By: Vince Hradil on Tue, 19 June 2007 06:45
		Re: How to retrieve information from an event to use it in another event? By: Michael Galloy on Tue, 19 June 2007 20:49

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