// Enable Drag & Drop Support
int ops = DND.DROP_COPY | DND.DROP_MOVE;
Transfer[] transfers = new Transfer[] { PluginTransfer.getInstance(),
TextTransfer.getInstance() };
treeViewer.addDragSupport(ops, transfers, new ResultTreeDragListener(
treeViewer));
// Handle Double Clicks on items
treeViewer.addDoubleClickListener(new ResultDoubleClickListener());
}