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Re: Getting checkbox value [message #28750 is a reply to message #28743]

Tue, 08 January 2002 13:02

Pavel A. Romashkin
Messages: 531
Registered: November 2000

Senior Member

I had a case when I kept on adding checkboxes a few times while
developing a program. I didn't want to go and change the State structure
all the time, so I wrote a small program called CHECKBOX. You can find
it here:
http://spot.colorado.edu/~romashki/idl/checkbox.pro
All you need is to set up a long integer somewhere (be it State
structure or Uvalue of one of the widgets already referred to in State
structure, for easy retrieving). Then, in the event code for the
checkbox, you call the CHECKBOX with event.select as ACTION keyword argument.
CHECKBOX program then will set an appropriate bit of the Long you
created, and the state of that bit is the same as the state of that
checkbox. Later, you can call
status = checkbox(Long_var, bit_number, /get)
and get status of checkbox.
Think of the space savings - you can store state of some 64 checkboxes
in just 8 bytes!
Pavel

Lisa Gandy wrote:
>
> I am trying to get the value of a checkbox...meaning I would like to
> know if the checkbox is selected at a certain time. I have looked
> through the references under widget_control and widget_info but
> neither of these keywords seem to return if a checkbox button has been
> selected or not. Did I overlook something?
>
> Cheers,
> Lisa Gandy

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[Message index]

		Re: Getting checkbox value By: Pavel A. Romashkin on Wed, 09 January 2002 08:18
		Re: Getting checkbox value By: R.Bauer on Wed, 09 January 2002 00:13
		Re: Getting checkbox value By: marc schellens[1] on Wed, 09 January 2002 11:30
		Re: Getting checkbox value By: Pavel A. Romashkin on Tue, 08 January 2002 13:02
		Re: Getting checkbox value By: Paul van Delst on Tue, 08 January 2002 10:34
		sorry By: marc schellens[1] on Thu, 10 January 2002 12:52

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