Name: boT120536 Date: 01/23/2001


C:\>java -version
java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-C)
Java HotSpot(TM) Client VM (build 1.3.0-C, mixed mode)

DropTarget.DropTargetAutoScroller computes the autoscrolling region
for the target component by calling component.getSize() and then applying
the component's autoscrollInsets. The dimension returned by getSize()
is the actual size of the complete component, *not* the size of the
region displayed in the scrollpane viewport. As a result, the autoscrolling
region is only accessible in the viewport when the edges of the component are
visible (that is, when no scrolling is required).

(The right and bottom edges are affected because getSize() does not
take visibility into account; the top and left edges are affected because
getSize() returns a Dimension -- just a width and a height, with no origin
information --- and so the autoscrolling region always abuts (0,0).)

The autoscrolling region should be computed using the visible rectangle
(the equivalent of JComponent.computeVisibleRect --- there doesn't seem to
be an equivalent method in AWT).
(Review ID: 113836)
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