splitPane.setLeftComponent(p);
JSplitPane innerSplit = UISupport.createVerticalSplit();
innerSplit.setBorder(null);
sourceArea = new JUndoableTextArea();
sourceArea.setToolTipText("XPath selection from source property");
sourceArea.setEnabled(false);
sourceArea.getDocument().addDocumentListener(new SourceAreaDocumentListener());
componentEnabler.add(sourceArea);
targetArea = new JUndoableTextArea();
targetArea.setToolTipText("XPath target in target property");
targetArea.setEnabled(false);
targetArea.getDocument().addDocumentListener(new TargetAreaDocumentListener());
componentEnabler.add(targetArea);