JScrollPane treeScroll = new JScrollPane(tree);
JXLayer<JScrollPane> treeScrollLayer = new JXLayer<JScrollPane>(treeScroll,
new MouseScrollableUI());
JScrollPane infoScroll = new JScrollPane(infosArea);
TitledPanel infosPanel = new TitledPanel(MESSAGES.getString("NodeInformations"));
infosPanel.setLayout(new BorderLayout());
infosPanel.add(infoScroll, BorderLayout.CENTER);
JSplitPane treeSplit = new JSplitPane(JSplitPane.VERTICAL_SPLIT, treeScrollLayer,
infosPanel);
JSplitPane mainSplit = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, treeSplit, tabbedPane);