CLIM mail archive
clim 2.0 color dialog code
Date: Mon, 10 Aug 1992 23:43 EDT
From: Philip Chu-Summer 92 <email@example.com>
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.
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