*/
public TreeViewWidget(TreeViewModel dtm) {
super(dtm);
this.scrollPolicy = Constants.NP_DEFAULT;
this.addTreeSelectionListener(dtm);
this.setCellRenderer(new TreeViewCellRenderer());
this.setShowsRootHandles(true);
this.putClientProperty("JTree.lineStyle", "Angled");
this.setDoubleBuffered(true);
this.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
// Forte fires the double click event when the user presses the ENTER key while in a TreeView - do the same here