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Re: widget_slider with odd integers [message #31515]

Mon, 22 July 2002 12:41

Daniel Peduzzi
Messages: 29
Registered: June 1999

Junior Member

Thierry Savin wrote in message <3D3C4643.1080709@mit.edu>...
> Hi all,
>
>
> Does anyone know how I could create a slider widget that produces only
> odd integers ?
>

If you are on a UNIX system, you could create a slider like this:

sliderID = widget_slider(base, value=some_odd_value, /drag, event_pro='slider_event')

which will cause the "slider_event" callback to be invoked whenever the
slider is dragged.

Then in your callback:

pro slider_event, event
my_odd_value= event.value / 2 * 2 + 1
widget_control, event.id, set_value=my_odd_value
return
end

This doesn't work *quite* as nicely under Windows, since drag events are
not generated...but the value will still jump to an odd value when the
thumbnail is "dropped."

Note: be careful of the maximum slider value (for example, trying to set
a slider with a max of 100 to the value 101 will result in a value of 100.)

Dan

---------------------------------------
Daniel C. Peduzzi
peduzzi@attbi.com
---------------------------------------

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		Re: widget_slider with odd integers By: Daniel Peduzzi on Mon, 22 July 2002 12:41
		Re: widget_slider with odd integers By: JD Smith on Mon, 22 July 2002 11:46

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