public interface Autoscroll
During DnD operations it is possible that a user may wish to drop the subject of the operation on a region of a scrollable GUI control that is not currently visible to the user.
In such situations it is desirable that the GUI control detect this and institute a scroll operation in order to make obscured region(s) visible to the user. This feature is known as autoscrolling.
If a GUI control is both an active
DropTarget and is also scrollable, it can receive notifications of autoscrolling gestures by the user from the DnD system by implementing this interface.
An autoscrolling gesture is initiated by the user by keeping the drag cursor motionless with a border region of the
Component, referred to as the "autoscrolling region", for a predefined period of time, this will result in repeated scroll requests to the
Component until the drag
Cursor resumes its motion.
This method returns the
Insets describing the autoscrolling region or border relative to the geometry of the implementing Component.
This value is read once by the
DropTarget upon entry of the drag
Cursor into the associated
void autoscroll(Point cursorLocn)
Component to autoscroll
Pointindicating the location of the cursor that triggered this operation.
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