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Large widget identifiers [message #33184]

Fri, 13 December 2002 02:59

Ian Dean
Messages: 26
Registered: January 2000

Junior Member

Hi,
Has anyone come across widget IDs "wrapping" when they reach a short int
limit (65535)?

We have a run-time IDL program that is running continuously for days/weeks.
During this time several runs of data are processed. Each run requires
approximately 400 widgets. However, without wishing to exit the software,
the runs are performed within one program.

The problem occurrs when the widget ID reaches 65535, the next widget to be
created is 0, not 65536. This looks like a short int problem, but IDs are
supposed to be long int.

Is there a way under program control to reset the widget ID back to 1 at the
beginning of a run?
I realise using the development environment .reset achieves this, but that
cannot be used in a running program.

This occurrs on IDL PC versions 5.2-5.5. However, it does not happen on
OpenVMS versions.

The following lines will cause the error to occur:-

FOR J=0L, 50000L DO BEGIN
Base=WIDGET_BASE()
WIDGET_CONTROL, Base, /DESTROY
ENDFOR

Any suggestions would be welcome
Regards,
Ian

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[Message index]

		Large widget identifiers By: Ian Dean on Fri, 13 December 2002 02:59
		Re: Large widget identifiers By: Andrew Cool on Sun, 15 December 2002 13:55
		Re: Large widget identifiers By: Jeff Guerber on Fri, 13 December 2002 16:53

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