+ // Make sure we're not trying to draw a panel
+ // larger than the visible window
+ ViewportRanges vpRanges = av.getRanges();
+ int scrollX = (int) evt.getNewValue() - (int) evt.getOldValue();
+ if (scrollX > vpRanges.getEndRes() - vpRanges.getStartRes())
+ {
+ scrollX = vpRanges.getEndRes() - vpRanges.getStartRes();
+ }
+ else if (scrollX < vpRanges.getStartRes() - vpRanges.getEndRes())
+ {
+ scrollX = vpRanges.getStartRes() - vpRanges.getEndRes();
+ }
+ fastPaint(scrollX, 0);