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Re: problems with passing structures around in gui widgets [message #40411 is a reply to message #40410]

Thu, 05 August 2004 09:56

MKatz843
Messages: 98
Registered: March 2002

Member

David Fanning <davidf@dfanning.com> wrote

> The standard rule is to check the info structure
> out at the top of the event handler, and check it
> back in before you exit the event handler:

That's true unless the UVALUE is also a pointer. In which case you
don't have to "check it back" when you're done with the event handler.
I've found out the hard way that checking-out the state variable and
checking it back later can lead to some nasty conflicts when you have
event-driven code, multiple things going on at once, and significant
subroutines called from the event handler.

M. Katz

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[Message index]

		Re: problems with passing structures around in gui widgets By: David Fanning on Thu, 05 August 2004 13:53
		Re: problems with passing structures around in gui widgets By: Jeff Guerber on Thu, 05 August 2004 13:14
		Re: problems with passing structures around in gui widgets By: David Fanning on Thu, 05 August 2004 10:03
		Re: problems with passing structures around in gui widgets By: MKatz843 on Thu, 05 August 2004 09:56
		Re: problems with passing structures around in gui widgets By: soule on Thu, 05 August 2004 09:16
		Re: problems with passing structures around in gui widgets By: David Fanning on Thu, 05 August 2004 08:38
		Re: problems with passing structures around in gui widgets By: R.Bauer on Thu, 05 August 2004 06:30
		Re: problems with passing structures around in gui widgets By: David Fanning on Wed, 04 August 2004 13:11

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