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Re: Getting checkbox value [message #28746 is a reply to message #28743]

Wed, 09 January 2002 11:30

marc schellens[1]
Messages: 183
Registered: January 2000

Senior Member

"Pavel A. Romashkin" wrote:
>
> 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

Actually I doubt that this is a good idea.
Especailly in IDL.
If you have megabytes of data, ok, but just for
checkboxes, the code you add to the running
program is *much* larger that the few bytes you saved.
(Unless you have thousands of checkboxes).

To Lisa:
if you create your checkbox with
id=cw_bgroup(tlb,['b1','b2'...],/NONEXCLUSIVE)
you can get the status of the buttons anytime with
widget_control,id,GET_VALUE=arr
where arr is an intarr set to 1 for every selected button, 0 for
nonselected.

cheers,
marc

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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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