Application: gvSIG desktop

    public static final String LEGEND_FILE_EXTENSION = ".gvsleg";

import java.security.acl.LastOwnerException;

				params[1] = SymbolManager.LEGEND_FILE_EXTENSION.substring(1);

					FileInputStream is = new FileInputStream(file);

					legend = (ILegend) persistenceManager.getObject(is);

					is.close();

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.io.OutputStream;

import javax.swing.JButton;

import javax.swing.JComponent;

import javax.swing.JFileChooser;

import javax.swing.filechooser.FileFilter;

import org.gvsig.fmap.mapcontext.rendering.symbols.SymbolManager;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.persistence.PersistenceManager;

 * Implements the panel which allows the user to control all the information

 * about the

 * legends of a layer in order to improve the information that it offers to the

 * user.

 * 

    private static final long serialVersionUID = 7989057553773181019L;

    private static ArrayList<Class<? extends ILegendPanel>> legendPool =

        new ArrayList<Class<? extends ILegendPanel>>();

    // private static ArrayList<Class<? extends IFMapLegendDriver>>

    // legendDriverPool = new ArrayList<Class<? extends IFMapLegendDriver>>();

    private FLayer layer;

    private ILegend legend; // Le asignaremos la leyenda del primer tema activo.

    private Hashtable<Class<? extends ILegendPanel>, ILegendPanel> pages =

        new Hashtable<Class<? extends ILegendPanel>, ILegendPanel>();

    private JPanel topPanel = null;

    private JTextArea titleArea = null;

    private JPanel preview = null;

    private JScrollPane jTitleScrollPane = null;

    private JTree jTreeLegends;

    private ILegendPanel activePanel;

    private JScrollPane legendTreeScrollPane;

    private boolean dirtyTree;

    private DefaultMutableTreeNode root = new DefaultMutableTreeNode();

    private DefaultTreeModel treeModel;

    private JScrollPane jPanelContainer;

    private JPanel jCentralPanel;

    private JSplitPane jSplitPane;

    private boolean isTreeListenerDisabled;

    private JButton btnSaveLegend;

    private JButton btnLoadLegend;

    private Hashtable<FLayer, ILegend> table = null;

    private boolean empty = true;

    private JLabel iconLabel;

    public static String defaultLegendFolderPath;

    {

        Preferences prefs = Preferences.userRoot().node("gvsig.foldering");

        defaultLegendFolderPath = prefs.get("LegendsFolder", "");

    }

    private ActionListener loadSaveLegendAction = new ActionListener() {

        public void actionPerformed(java.awt.event.ActionEvent e) {

            JComponent c = (JComponent) e.getSource();

            if (c.equals(getBtnSaveLegend())) {

                saveLegend();

            } else

                if (c.equals(getBtnLoadLegend())) {

                    loadLegend();

                }

        }

        private void saveLegend() {

            ILegend legend = activePanel.getLegend();

            PersistenceManager manager = ToolsLocator.getPersistenceManager();

            JFileChooser fileChooser = new JFileChooser();

            fileChooser.setAcceptAllFileFilterUsed(false);

            fileChooser.setFileFilter(new FileFilter() {

                @Override

                public String getDescription() {

                    return "Legend files (*"

                        + SymbolManager.LEGEND_FILE_EXTENSION + ")";

                }

                @Override

                public boolean accept(File f) {

                    if (f.isDirectory()) {

                        return true;

                    } else

                        if (f.isFile() && getExtension(f) != null) {

                            return getExtension(f).equals(

                                SymbolManager.LEGEND_FILE_EXTENSION);

                        } else {

                            return false;

                        }

                }

            });

            if (fileChooser.showSaveDialog((Component) PluginServices

                .getMainFrame()) == JFileChooser.APPROVE_OPTION) {

                OutputStream os;

                File selectedFile = fileChooser.getSelectedFile();

                if (getExtension(selectedFile) == null

                    || !getExtension(selectedFile).equals(

                        SymbolManager.LEGEND_FILE_EXTENSION)) {

                    File selectedFileWithExtension =

                        new File(selectedFile.getAbsolutePath()

                            + SymbolManager.LEGEND_FILE_EXTENSION);

                    selectedFile = selectedFileWithExtension;

                }

                try {

                    os = new FileOutputStream(selectedFile);

                } catch (FileNotFoundException e) {

                    JOptionPane.showMessageDialog(null,

                        "_cant_open_the_input_file_legend");

                    return;

                }

                manager.putObject(os, legend);

            }

        }

        private void loadLegend() {

            JFileChooser fileChooser = new JFileChooser();

            fileChooser.setAcceptAllFileFilterUsed(false);

            // fileChooser filter

            fileChooser.setFileFilter(new FileFilter() {

                @Override

                public String getDescription() {

                    // get this extension from manager or somewhere!

                    return "Legend files (*"

                        + SymbolManager.LEGEND_FILE_EXTENSION + ")";

                }

                @Override

                public boolean accept(File f) {

                    if (f.isDirectory()) {

                        return true;

                    } else

                        if (f.isFile() && getExtension(f) != null) {

                            return getExtension(f).equals(

                                SymbolManager.LEGEND_FILE_EXTENSION);

                        } else {

                            return false;

                        }

                }

            });

            // open a file

            if (fileChooser.showOpenDialog((Component) PluginServices

                .getMainFrame()) == JFileChooser.APPROVE_OPTION) {

                File file = fileChooser.getSelectedFile();

                PersistenceManager manager =

                    ToolsLocator.getPersistenceManager();

                InputStream is;

                try {

                    is = new FileInputStream(file);

                } catch (FileNotFoundException e) {

                    JOptionPane.showMessageDialog(null,

                        "_cant_open_the_input_file_legend");

                    return;

                }

                ILegend legend = (ILegend) manager.getObject(is);

                applyLegend(legend);

            }

        }

    };

    //

    // JLegendFileChooser jfc = new

    // JLegendFileChooser(getLegendDrivers(),true);

    // jfc.setAcceptAllFileFilterUsed(false);

    //

    //

    // File basedir = null;

    // jfc.setCurrentDirectory(basedir);

    // if (jfc.showSaveDialog((Component) PluginServices.getMainFrame())

    // == JFileChooser.APPROVE_OPTION) {

    //

    // File file = jfc.getSelectedFile();

    // String version = jfc.getDriverVersion();

    // IFMapLegendDriver driver = jfc.getSuitableDriver();

    //

    // if(!(driver instanceof FMapGVLDriver)){

    // Object[] options = {PluginServices.getText(this, "yes"),

    // PluginServices.getText(this, "no")};

    //

    // int answer =

    // JOptionPane.showOptionDialog((Component)PluginServices.getMainFrame(),

    // PluginServices.getText(this, "not_GVSLEG_save_question")+"\n"+ //GVL

    // changed to GVSLEG, be aware

    // PluginServices.getText(this, "desea_continuar"),

    // PluginServices.getText(this, "confirmation_dialog"),

    // JOptionPane.YES_NO_OPTION,

    // JOptionPane.QUESTION_MESSAGE,

    // null,

    // options, options[1]);

    // if (answer!=JOptionPane.OK_OPTION) {

    // // 'Cancel' pressed or window closed: don't save anythig, exit

    // save dialog

    // return;

    // }

    // }

    //

    // if (file.exists()) {

    // Object[] options = {PluginServices.getText(this, "yes"),

    // PluginServices.getText(this, "no"),

    // PluginServices.getText(this, "Cancel")};

    //

    // int answer =

    // JOptionPane.showOptionDialog((Component)PluginServices.getMainFrame(),

    // PluginServices.getText(this,

    // "fichero_ya_existe_seguro_desea_guardarlo"),

    // PluginServices.getText(this, "confirmation_dialog"),

    // JOptionPane.YES_NO_CANCEL_OPTION,

    // JOptionPane.QUESTION_MESSAGE,

    // null,

    // options, options[1]);

    // if (answer!=JOptionPane.OK_OPTION) {

    // // 'Cancel' pressed or window closed: don't save anythig, exit

    // save dialog

    // return;

    // }

    // }

    //

    //

    // try {

    // driver.write(layer.getMapContext().getLayers(),layer,

    // activePanel.getLegend(), file, version);

    //

    // } catch (LegendDriverException e1) {

    // int type = e1.getType();

    // String message=PluginServices.getText(this,

    // "could_not_save_legend")+":\n";

    //

    // if ((type & LegendDriverException.SAVE_LEGEND_ERROR) != 0){

    // type = type & ~LegendDriverException.SAVE_LEGEND_ERROR;

    // message += PluginServices.getText(this,

    // "error_writing_file")+".\n";

    // }

    // if ((type & LegendDriverException.UNSUPPORTED_LEGEND_CREATION) !=

    // 0){

    // type = type & ~LegendDriverException.UNSUPPORTED_LEGEND_CREATION;

    // message += "-"+ PluginServices.getText(this,

    // "legend_format_not_yet_supported")+"\n";

    // }

    // if (type != 0) {

    // message = "-"+PluginServices.getText(this, "unknown_error")+"\n";

    // }

    // JOptionPane.showMessageDialog((Component)PluginServices.getMainFrame(),

    // message);

    // }

    // }

    // } else if (c.equals(getBtnLoadLegend())) {

    //

    // JLegendFileChooser jfc = new

    // JLegendFileChooser(getLegendDrivers());

    // jfc.setAcceptAllFileFilterUsed(false);

    //

    // if (jfc.showOpenDialog((Component) PluginServices.getMainFrame())

    // == JFileChooser.APPROVE_OPTION) {

    // File file=jfc.getSelectedFile();

    // IFMapLegendDriver driver = jfc.getSuitableDriver();

    // String path = file.getAbsolutePath();

    // defaultLegendFolderPath = path.substring(0,

    // path.lastIndexOf(File.separator));

    //

    // try {

    // table = driver.read(layer.getMapContext().getLayers(),layer,

    // file);

    //

    // if(table.containsKey(layer))

    // applyLegend((ILegend) table.get(layer));

    //

    //

    // } catch (LegendDriverException e1) {

    // int type = e1.getType();

    // String message = PluginServices.getText(this,

    // "the_legend_will_not_be_applied")+":\n";

    // boolean hasReason = false;

    //

    // if ((type &

    // LegendDriverException.CLASSIFICATION_FIELDS_NOT_FOUND) != 0){

    // type = type &

    // ~LegendDriverException.CLASSIFICATION_FIELDS_NOT_FOUND;

    // message +="-"+ PluginServices.getText(this,

    // "classification_field_does_not_exists")+"\n";

    // hasReason = true;

    // }

    // if ((type & LegendDriverException.LEGEND_TYPE_NOT_YET_SUPPORTED)

    // != 0){

    // type = type &

    // ~LegendDriverException.LEGEND_TYPE_NOT_YET_SUPPORTED;

    // message += "-"+ PluginServices.getText(this,

    // "legend_type_not_yet_supported")+"\n";

    // hasReason = true;

    // }

    // if ((type & LegendDriverException.SYMBOL_TYPE_NOT_YET_SUPPORTED)

    // != 0){

    // type = type &

    // ~LegendDriverException.SYMBOL_TYPE_NOT_YET_SUPPORTED;

    // message += "-"+ PluginServices.getText(this,

    // "unsupported_symbol_type")+"\n";

    // hasReason = true;

    // }

    // if ((type & LegendDriverException.LAYER_SHAPETYPE_MISMATCH) !=

    // 0){

    // type = type & ~LegendDriverException.LAYER_SHAPETYPE_MISMATCH;

    // message += "-"+ PluginServices.getText(this,

    // "layer_geometry_and_legend_types_are_incompatible")+"\n";

    // hasReason = true;

    // }

    // if ((type & LegendDriverException.PARSE_LEGEND_FILE_ERROR) != 0){

    // type = type & ~LegendDriverException.PARSE_LEGEND_FILE_ERROR;

    // message += "-"+ PluginServices.getText(this,

    // "failed_reading_file")+"\n";

    // hasReason = true;

    // }

    // if ((type &

    // LegendDriverException.UNSUPPORTED_LEGEND_FILE_VERSION) != 0){

    // type = type &

    // ~LegendDriverException.UNSUPPORTED_LEGEND_FILE_VERSION;

    // message += "-"+ PluginServices.getText(this,

    // "unsupported_legend_file_version")+"\n";

    // hasReason = true;

    // }

    // if ((type & LegendDriverException.UNSUPPORTED_LEGEND_READING) !=

    // 0){

    // type = type & ~LegendDriverException.UNSUPPORTED_LEGEND_READING;

    // message +="-"+ PluginServices.getText(this,

    // "unsupported_legend_file_format")+"\n";

    // hasReason = true;

    // }

    // if ((type & LegendDriverException.LAYER_NAME_NOT_FOUND) != 0){

    // type = type & ~LegendDriverException.UNSUPPORTED_LEGEND_READING;

    // message +="-"+ PluginServices.getText(this,

    // "could_not_find_layer")+"\n";

    // hasReason = true;

    // }

    // if (!hasReason) {

    // message = "-"+ PluginServices.getText(this,

    // "unknown_error")+"\n";

    // }

    // JOptionPane.showMessageDialog((Component)PluginServices.getMainFrame(),

    // message);

    // }

    // }

    // }

    // private IFMapLegendDriver[] getLegendDrivers() {

    // Class<?>[] legendDriverClasses = legendDriverPool.toArray(new Class[0]);

    // ArrayList<IFMapLegendDriver> drivers = new

    // ArrayList<IFMapLegendDriver>();

    // for (int i = 0; i < legendDriverClasses.length; i++) {

    // String message = PluginServices.getText(this,

    // "adding_legend_file_format_support")+": ";

    // try {

    // Class<?> c = legendDriverClasses[i];

    // drivers.add((IFMapLegendDriver) c.newInstance());

    // } catch (Exception e) {

    // NotificationManager.addError(message+PluginServices.getText(this,

    // "failed"), e);

    // }

    // NotificationManager.addInfo(message+PluginServices.getText(this, "OK"));

    //

    // }

    // return (IFMapLegendDriver[]) drivers.toArray(new IFMapLegendDriver[0]);

    // };

    private String getExtension(File f) {

        String ext = null;

        String s = f.getName();

        int i = s.lastIndexOf('.');

        if (i > 0 && i < s.length() - 1) {

            // ext = s.substring(i + 1).toLowerCase();

            ext = s.substring(i).toLowerCase();

        }

        return ext;

    }

    public LegendManager() {

        initialize();

    }

    private void initialize() {

        setLayout(new BorderLayout());

        add(getTopPanel(), BorderLayout.NORTH);

        add(getSplitPane(), BorderLayout.CENTER);

        setSize(500, 360);

        treeModel = new DefaultTreeModel(root);

    }

    private JSplitPane getSplitPane() {

        if (jSplitPane == null) {

            jSplitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);

            JPanel aux = new JPanel(new BorderLayout(0, 5));

            aux.add(getLegendTreeScrollPane(), BorderLayout.CENTER);

            aux.add(getPreviewPanel(), BorderLayout.SOUTH);

            jSplitPane.setLeftComponent(aux);

            jSplitPane.setRightComponent(getCentralPanel());

            jSplitPane.setDividerLocation(150);

        }

        return jSplitPane;

    }

    private JPanel getCentralPanel() {

        if (jCentralPanel == null) {

            jCentralPanel = new JPanel(new BorderLayout(0, 10));

            jCentralPanel.add(getTitleScroll(), BorderLayout.NORTH);

            jCentralPanel.add(getJPanelContainer(), BorderLayout.CENTER);

        }

        return jCentralPanel;

    }

    private JScrollPane getJPanelContainer() {

        if (jPanelContainer == null) {

            jPanelContainer = new JScrollPane();

        }

        return jPanelContainer;

    }

    /**

     * This method initializes jPanel

     * 

     * @return javax.swing.JPanel

     */

    private JPanel getTopPanel() {

        if (topPanel == null) {

            topPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT, 5, 0));

            topPanel.setPreferredSize(new Dimension(638, 31));

            topPanel.setBorder(javax.swing.BorderFactory.createTitledBorder(

                null, "",

                javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION,

                javax.swing.border.TitledBorder.DEFAULT_POSITION, null, null));

            topPanel.add(getBtnSaveLegend(), null);

            topPanel.add(getBtnLoadLegend(), null);

        }

        return topPanel;

    }

    private JButton getBtnSaveLegend() {

        if (btnSaveLegend == null) {

            btnSaveLegend =

                new JButton(PluginServices.getText(this, "Guardar_leyenda")

                    + "...");

            btnSaveLegend.addActionListener(loadSaveLegendAction);

        }

        return btnSaveLegend;

    }

    private JButton getBtnLoadLegend() {

        if (btnLoadLegend == null) {

            btnLoadLegend =

                new JButton(PluginServices.getText(this, "Recuperar_leyenda")

                    + "...");

            btnLoadLegend.addActionListener(loadSaveLegendAction);

        }

        return btnLoadLegend;

    }

    /**

     * This method initializes jTextArea

     * 

     * @return javax.swing.JTextArea

     */

    private JTextArea getTitleArea() {

        if (titleArea == null) {

            titleArea = new JTextArea();

            titleArea.setBackground(java.awt.SystemColor.control);

            titleArea.setLineWrap(true);

            titleArea.setRows(0);

            titleArea.setWrapStyleWord(false);

            titleArea.setEditable(false);

            titleArea.setPreferredSize(new java.awt.Dimension(495, 40));

        }

        return titleArea;

    }

    /**

     * This method initializes jPanel1

     * 

     * @return javax.swing.JPanel

     */

    private JPanel getPreviewPanel() {

        if (preview == null) {

            preview = new JPanel();

            preview.setBorder(javax.swing.BorderFactory

                .createBevelBorder(javax.swing.border.BevelBorder.LOWERED));

            preview.setBackground(java.awt.SystemColor.text);

            preview.setLayout(new BorderLayout(5, 5));

            preview.add(getIconLabel());

            preview.setPreferredSize(new Dimension(getSplitPane()

                .getDividerLocation(), 130));

            preview.setBackground(Color.white);

        }

        return preview;

    }

    private JLabel getIconLabel() {

        if (iconLabel == null) {

            iconLabel = new JLabel();

            iconLabel.setVerticalAlignment(JLabel.CENTER);

            iconLabel.setHorizontalAlignment(JLabel.CENTER);

        }

        return iconLabel;

    }

    /**

     * This method initializes jScrollPane

     * 

     * @return javax.swing.JScrollPane

     */

    private JScrollPane getLegendTreeScrollPane() {

        if (legendTreeScrollPane == null) {

            legendTreeScrollPane = new JScrollPane();

            legendTreeScrollPane.setViewportView(getJTreeLegends());

        }

        return legendTreeScrollPane;

    }

    /**

     * <p>

     * Adds a new fully-featured legend panel to the LegendManager.<br>

     * </p>

     * 

     * <p>

     * <b>CAUTION:</b> Trying to add a child page whose parent hasn't been added

     * yet causes the application to fall in an infinite loop. This is a known

     * bug, sorry. Just avoid this case or try to fix it (lol).<br>

     * </p>

     * 

     * <p>

     * <b>Notice</b> that there is no type check so if you add a

     * non-ILegendPanel class, you'll have a runtime error later.

     * </p>

     * 

     * @param page

     *            , Class of type ILegendPanel

     */

    public static void addLegendPage(

        Class<? extends ILegendPanel> iLegendPanelClass) {

        if (!legendPool.contains(iLegendPanelClass)) {

            legendPool.add(iLegendPanelClass);

        }

    }

    /**

     * Causes the component to be autofilled with the legend pages that

     * were added through the static method addLegendPage(ILegendPanel page)

     */

    private void fillDialog() {

        if (empty) {

            for (int i = 0; i < legendPool.size(); i++) {

                Class<?> pageClass = (Class<?>) legendPool.get(i);

                ILegendPanel page;

                try {

                    page = (ILegendPanel) pageClass.newInstance();

                    if (page.isSuitableFor(layer)) {

                        // this legend can be applied to this layer

                        pages.put(page.getClass(), page);

                        if (dirtyTree) {

                            // rebuild page tree

                            dirtyTree = false;

                            ArrayList<ILegendPanel> legList =

                                new ArrayList<ILegendPanel>(pages.values());

                            ArrayList<ILegendPanel> alreadyAdded =

                                new ArrayList<ILegendPanel>();

                            DefaultTreeModel model = new DefaultTreeModel(root);

                            while (legList.size() > 0) {

                                ILegendPanel legend =

                                    (ILegendPanel) legList.get(0);

                                Class<? extends ILegendPanel> parent =

                                    legend.getParentClass();

                                while (parent != null

                                    && !alreadyAdded

                                        .contains(pages.get(parent))) {

                                    legend = (ILegendPanel) pages.get(parent);

                                }

                                doInsertNode(model, legend);

                                legList.remove(legend);

                                alreadyAdded.add(legend);

                            }

                            treeModel = model;

                            jTreeLegends.setModel(model);

                        }

                        doInsertNode(treeModel, page);

                    }

                    getJTreeLegends().setModel(treeModel);

                } catch (InstantiationException e) {

                    NotificationManager.addError(

                        "Trying to instantiate an interface"

                            + " or abstract class + " + pageClass.getName(), e);

                } catch (IllegalAccessException e) {

                    NotificationManager.addError(

                        "IllegalAccessException: does " + pageClass.getName()

                            + " class have an anonymous" + " constructor?", e);

                }

            }

            getJTreeLegends().repaint();

            empty = false;

        }

    }

    @SuppressWarnings("unchecked")

    private DefaultMutableTreeNode findNode(Class searchID) {

        String title;

        try {

            title =

                ((ILegendPanel) Class.forName(searchID.getName()).newInstance())

                    .getTitle();

        } catch (Exception e) {

            // this should be impossible, but anyway this case will be treat as

            // the node does not

            // exist.

            return null;

        }

        Enumeration e = root.breadthFirstEnumeration();

        while (e.hasMoreElements()) {

            DefaultMutableTreeNode nodeAux =

                (DefaultMutableTreeNode) e.nextElement();

            if (nodeAux != null) {

                ILegendPanel legend = (ILegendPanel) nodeAux.getUserObject();

                if (legend == null)

                    continue; // Root node

                if (legend.getTitle().equals(title)) {

                    return nodeAux;

                }

            }

        }

        return null;

    }

    private void doInsertNode(DefaultTreeModel treeModel, ILegendPanel page) {

        dirtyTree =

            ((page.getParentClass() != null) && (findNode(page.getParentClass()) == null));

        if (findNode(page.getClass()) != null) // It is already added

            return;

        if (page.getParentClass() != null) {

            if (pages.containsKey(page.getParentClass())) {

                ILegendPanel parent =

                    (ILegendPanel) pages.get(page.getParentClass());

                DefaultMutableTreeNode nodeParent = findNode(parent.getClass());

                if (nodeParent == null) {

                    // the parent is empty

                    // Recursively add it

                    doInsertNode(treeModel, parent);

                } else {

                    DefaultMutableTreeNode nodeValue =

                        new DefaultMutableTreeNode(page);

                    int children = nodeParent.getChildCount();

                    int pos = 0;

                    for (int i = 0; i < children; i++) {

                        DefaultMutableTreeNode node =

                            (DefaultMutableTreeNode) treeModel.getChild(

                                nodeParent, i);

                        if (node.getUserObject() instanceof ILegendPanel) {

                            String pageTitle =

                                ((ILegendPanel) node.getUserObject())

                                    .getTitle();

                            if (pageTitle.compareTo(page.getTitle()) < 0)

                                ++pos;

                        }

                    }

                    treeModel.insertNodeInto(nodeValue, nodeParent, pos);

                }

            }

        } else {

            // First level node

            DefaultMutableTreeNode nodeValue = new DefaultMutableTreeNode(page);

            int children = root.getChildCount();

            int pos = 0;

            for (int i = 0; i < children; i++) {

                DefaultMutableTreeNode node =

                    (DefaultMutableTreeNode) treeModel.getChild(root, i);

                if (node.getUserObject() instanceof ILegendPanel) {

                    String pageTitle =

                        ((ILegendPanel) node.getUserObject()).getTitle();

                    if (pageTitle.compareTo(page.getTitle()) < 0)

                        ++pos;

                }

            }

            treeModel.insertNodeInto(nodeValue, root, pos);

        }

    }

    private JScrollPane getTitleScroll() {

        if (jTitleScrollPane == null) {

            jTitleScrollPane = new JScrollPane();

            jTitleScrollPane.setBounds(2, 2, 498, 42);

            jTitleScrollPane.setViewportView(getTitleArea());

        }

        return jTitleScrollPane;

    }

    private JTree getJTreeLegends() {

        if (jTreeLegends == null) {

            jTreeLegends = new JTree();

            jTreeLegends.setRootVisible(false);

            MyTreeCellRenderer treeCellRenderer = new MyTreeCellRenderer();

            treeCellRenderer.setOpenIcon(null);

            treeCellRenderer.setClosedIcon(null);

            treeCellRenderer.setLeafIcon(null);

            jTreeLegends.setCellRenderer(treeCellRenderer);

            jTreeLegends.setShowsRootHandles(true);

            jTreeLegends

                .addTreeSelectionListener(new javax.swing.event.TreeSelectionListener() {

                    public void valueChanged(

                        javax.swing.event.TreeSelectionEvent e) {

                        if (isTreeListenerDisabled)

                            return;

                        DefaultMutableTreeNode node =

                            (DefaultMutableTreeNode) jTreeLegends

                                .getLastSelectedPathComponent();

                        if (node == null)

                            return;

                        setActivePage((ILegendPanel) node.getUserObject());

                    }

                });

            jTreeLegends.putClientProperty("JTree.linestyle", "Angled");

            jTreeLegends.getSelectionModel().setSelectionMode(

                TreeSelectionModel.SINGLE_TREE_SELECTION);

        }

        return jTreeLegends;

    }

    private void setActivePage(ILegendPanel page) {

        if (page.getPanel() == null) {

            // this is what happens when the user clicked in a parent node

            // which only acts as a folder, and does not manage any legend

            // then it expands and selects the first child

            DefaultMutableTreeNode node = findNode(page.getClass());

            if (treeModel.getChildCount(node) > 0) {

                DefaultMutableTreeNode dmn =

                    (DefaultMutableTreeNode) treeModel.getChild(node, 0);

                page = (ILegendPanel) dmn.getUserObject();

                setActivePage(page);

                expandAndSelect(page);

            }

        } else {

            // show the page

            activePanel = page;

            setIcon(activePanel.getIcon());

            activePanel.setData(layer, legend);

            getTitleArea().setText(activePanel.getDescription());

            jPanelContainer.setViewportView(activePanel.getPanel());

        }

    }

    private void setIcon(ImageIcon icon) {

        getIconLabel().setIcon(icon);

    }

    private class MyTreeCellRenderer extends DefaultTreeCellRenderer {

        private static final long serialVersionUID = -6013698992263578041L;

        public MyTreeCellRenderer() {

        }

        public Component getTreeCellRendererComponent(JTree tree, Object value,

            boolean sel, boolean expanded, boolean leaf, int row,

            boolean hasFocus) {

            super.getTreeCellRendererComponent(tree, value, sel, expanded,

                leaf, row, hasFocus);

            if (value instanceof DefaultMutableTreeNode) {

                DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;

                if (node.getUserObject() instanceof ILegendPanel) {