The BasicScrollBarUI should scroll by -block or -unit (fetched from the
Scrollable impl) when the direction is not positive, and +unit or +block
otherwise. So far we expected the Scrollable impl to return a negative
value for up-scrolling and a positive value for down scrolling. Which is
wrong
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Hi Roman,
For all Swing hackers: As a general rule, do not put repaint and
revalidate calls in event handlers. When a property change must trigger
a repaint and/or revalidate, then this should happen in the
corresponding setter method. This makes
