/** This is called to transfer the data. */
public void dragSetData(DragSourceEvent event) {
if (LocalTransfer.getInstance().isSupportedType(event.dataType)) {
event.data = selection;
}
}
/** This is called when dragging is completed; it forgets the {@link #selection}. */
public void dragFinished(DragSourceEvent event) {
selection = null;
LocalTransfer.getInstance().javaToNative(null, null);
}