| Re: Double thumbed slider or equivalent? [message #31883] |
Mon, 26 August 2002 21:31 |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Andrew Cool (andrew.cool@dsto.defence.gov.au) writes:
> But I think a faster way still would be to have a slider "thingy"
> that had the equivalent of two sliding thumbs - I think that's the
> jargon for the little doo-hickey that you grab with the mouse and move?
I don't have such a thingy built, but--in principle--it
is no different from the little histogram-selector
doo-hickey I have built into XSTRETCH. There, you
grab indicators and move them to select the upper
and lower bounds of a stretch. You have to make
sure they don't overlap, the upper can't have a value
less than the lower, etc.
http://www.dfanning.com/xstretch.pro
You probably want a tiny polygon, rather than the
two lines, but the draw widget code should be pretty
much intact.
Cheers,
David
--
David W. Fanning, Ph.D.
Fanning Software Consulting, Inc.
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
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