explPanel.add(explorerPane, BorderLayout.CENTER);
JPanel attrPanel = new JPanel(new BorderLayout());
attrPanel.add(attrTable, BorderLayout.CENTER);
attrPanel.add(zoom, BorderLayout.SOUTH);
leftRegion = new HorizontalSplitPane(explPanel, attrPanel,
AppPreferences.WINDOW_LEFT_SPLIT.get().doubleValue());
mainRegion = new VerticalSplitPane(leftRegion, mainPanelSuper,
AppPreferences.WINDOW_MAIN_SPLIT.get().doubleValue());
getContentPane().add(mainRegion, BorderLayout.CENTER);