clim 2.0 color dialog code

• To: pchu@ptolemy.arc.nasa.gov, SWM@stony-brook.scrc.symbolics.com
• Subject: clim 2.0 color dialog code
• From: Scott McKay <SWM@stony-brook.scrc.symbolics.com>
• Date: Mon, 24 Aug 1992 15:19-0400
• Cc: clim@BBN.COM
• In-Reply-To: <9208110343.AA16604@ptolemy.arc.nasa.gov>

    Date: Mon, 10 Aug 1992 23:43 EDT
    From: Philip Chu-Summer 92 <pchu@ptolemy.arc.nasa.gov>

    Thanks, I found your color demo helpful in clearing up a lot of
    points. I am still puzzled by one aspect of slider callbacks.
    Originally, I defined a method on DRAG-CALLBACK, but that didn't seem
    to have any effect, so I switched to VALUE-CHANGED-CALLBACK. I noticed
    in your example that you define identical methods on both. Are they
    both called when the slider is dragged, or is one supposed to
    supersede the other?

VALUE-CHANGED-CALLBACK gets invoked when the "final" value of the slider
is set.  On most toolkits, this happens when you release the mouse button.

DRAG-CALLBACK gets invoked as you drag the slider indicator around with
the mouse button pressed.  Obviously, the very last DRAG-CALLBACK and
the VALUE-CHANGED-CALLBACK will probably have the same value.

• clim 2.0 color dialog code
• From: Philip Chu-Summer 92 <pchu@ptolemy.arc.nasa.gov>

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