/** Update the arrow head type on the currently selected links. */
  private void onUpdateArrowType(int nArrowType) {
    if (!bJustSetting) {

      UIViewFrame frame = ProjectCompendium.APP.getCurrentFrame();
      Model oModel = (Model) ProjectCompendium.APP.getModel();
      if (frame instanceof UIMapViewFrame) {

        Vector vtUpdateLinks = new Vector();
        UIMapViewFrame oMapFrame = (UIMapViewFrame) frame;
        UIViewPane pane = oMapFrame.getViewPane();
        UILink link = null;
        LinkProperties props = null;
        for (Enumeration e = pane.getSelectedLinks(); e.hasMoreElements(); ) {
          link = (UILink) e.nextElement();
          props = link.getLinkProperties();
          if (nArrowType != props.getArrowType()) {
            vtUpdateLinks.addElement(props);
          }
        }
        if (vtUpdateLinks.size() > 0) {
          try {
            ((ViewService) oModel.getViewService())
                .setArrowType(
                    oModel.getSession(), pane.getView().getId(), vtUpdateLinks, nArrowType);
            int count = vtUpdateLinks.size();
            for (int i = 0; i < count; i++) {
              props = (LinkProperties) vtUpdateLinks.elementAt(i);
              props.setArrowType(nArrowType);
            }
          } catch (SQLException ex) {
            ProjectCompendium.APP.displayError(
                LanguageProperties.getString(
                        LanguageProperties.TOOLBARS_BUNDLE,
                        "UIToolBarFormatLink.unableUpdateArrowType")
                    + ":\n\n"
                    + ex.getMessage()); // $NON-NLS-1$
          }
        }
      }
    }
  }
  /**
   * Create a choicebox for link line style options and return the panel it is in.
   *
   * @return JPanel the panel holding the new choicebox for the link style options.
   */
  private JPanel createLinkDashedChoiceBox() {

    JPanel drawPanel = new JPanel(new BorderLayout());
    CSH.setHelpIDString(drawPanel, "toolbars.formatlink"); // $NON-NLS-1$

    cbLinkDashed = new JComboBox();
    cbLinkDashed.setToolTipText(
        LanguageProperties.getString(
            LanguageProperties.TOOLBARS_BUNDLE, "UIToolBarFormatLink.selectDashed")); // $NON-NLS-1$
    cbLinkDashed.setOpaque(true);
    cbLinkDashed.setEditable(false);
    cbLinkDashed.setEnabled(false);
    cbLinkDashed.setMaximumRowCount(10);
    cbLinkDashed.setFont(new Font("Dialog", Font.PLAIN, 10)); // $NON-NLS-1$

    cbLinkDashed.addItem(
        new String(
            LanguageProperties.getString(
                LanguageProperties.TOOLBARS_BUNDLE,
                "UIToolBarFormatLink.plainLine"))); //$NON-NLS-1$
    cbLinkDashed.addItem(
        new String(
            LanguageProperties.getString(
                LanguageProperties.TOOLBARS_BUNDLE,
                "UIToolBarFormatLink.largeDashes"))); //$NON-NLS-1$
    cbLinkDashed.addItem(
        new String(
            LanguageProperties.getString(
                LanguageProperties.TOOLBARS_BUNDLE,
                "UIToolBarFormatLink.smallDashes"))); //$NON-NLS-1$

    cbLinkDashed.validate();

    cbLinkDashed.setSelectedIndex(0);

    DefaultListCellRenderer drawRenderer =
        new DefaultListCellRenderer() {
          public Component getListCellRendererComponent(
              JList list, Object value, int modelIndex, boolean isSelected, boolean cellHasFocus) {
            if (list != null) {
              if (isSelected) {
                setBackground(list.getSelectionBackground());
                setForeground(list.getSelectionForeground());
              } else {
                setBackground(list.getBackground());
                setForeground(list.getForeground());
              }
            }

            setText((String) value);
            return this;
          }
        };

    cbLinkDashed.setRenderer(drawRenderer);

    ActionListener drawActionListener =
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            onUpdateLinkDashed(cbLinkDashed.getSelectedIndex());
          }
        };
    cbLinkDashed.addActionListener(drawActionListener);

    drawPanel.add(new JLabel(" "), BorderLayout.WEST); // $NON-NLS-1$
    drawPanel.add(cbLinkDashed, BorderLayout.CENTER);
    return drawPanel;
  }
  /** Create the arrow head choicebox. */
  private JPanel createArrowChoiceBox() {

    JPanel drawPanel = new JPanel(new BorderLayout());
    CSH.setHelpIDString(drawPanel, "toolbars.formatlink"); // $NON-NLS-1$

    cbArrows = new JComboBox();
    cbArrows.setToolTipText(
        LanguageProperties.getString(
            LanguageProperties.TOOLBARS_BUNDLE, "UIToolBarFormatLink.selectArrow")); // $NON-NLS-1$
    cbArrows.setOpaque(true);
    cbArrows.setEditable(false);
    cbArrows.setEnabled(false);
    cbArrows.setMaximumRowCount(4);
    cbArrows.setFont(new Font("Dialog", Font.PLAIN, 10)); // $NON-NLS-1$

    Vector arrows = new Vector(5);
    arrows.insertElementAt(
        LanguageProperties.getString(
            LanguageProperties.DIALOGS_BUNDLE, "UILinkEditDialog.noArrows"),
        0); //$NON-NLS-1$
    arrows.insertElementAt(
        LanguageProperties.getString(LanguageProperties.DIALOGS_BUNDLE, "UILinkEditDialog.fromTo"),
        1); //$NON-NLS-1$
    arrows.insertElementAt(
        LanguageProperties.getString(LanguageProperties.DIALOGS_BUNDLE, "UILinkEditDialog.toFfrom"),
        2); //$NON-NLS-1$
    arrows.insertElementAt(
        LanguageProperties.getString(
            LanguageProperties.DIALOGS_BUNDLE, "UILinkEditDialog.bothWays"),
        3); //$NON-NLS-1$
    DefaultComboBoxModel comboModel = new DefaultComboBoxModel(arrows);
    cbArrows.setModel(comboModel);
    cbArrows.setSelectedIndex(0);

    DefaultListCellRenderer comboRenderer =
        new DefaultListCellRenderer() {
          public Component getListCellRendererComponent(
              JList list, Object value, int modelIndex, boolean isSelected, boolean cellHasFocus) {
            if (isSelected) {
              setBackground(list.getSelectionBackground());
              setForeground(list.getSelectionForeground());
            } else {
              setBackground(list.getBackground());
              setForeground(list.getForeground());
            }

            setText((String) value);

            return this;
          }
        };
    cbArrows.setRenderer(comboRenderer);

    cbArrows.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            onUpdateArrowType(cbArrows.getSelectedIndex());
          }
        });

    drawPanel.add(new JLabel(" "), BorderLayout.WEST); // $NON-NLS-1$
    drawPanel.add(cbArrows, BorderLayout.CENTER);
    return drawPanel;
  }
  /**
   * Create a choicbox for link line thickness options and return the panel it is in.
   *
   * @return JPanel the panel holding the new choicebox for the line thickness options.
   */
  private JPanel createWeightChoiceBox() {

    JPanel drawPanel = new JPanel(new BorderLayout());
    CSH.setHelpIDString(drawPanel, "toolbars.formatlink"); // $NON-NLS-1$

    cbLineWeight = new JComboBox();
    cbLineWeight.setToolTipText(
        LanguageProperties.getString(
            LanguageProperties.TOOLBARS_BUNDLE, "UIToolBarFormatLink.selectWeight")); // $NON-NLS-1$
    cbLineWeight.setOpaque(true);
    cbLineWeight.setEditable(false);
    cbLineWeight.setEnabled(false);
    cbLineWeight.setMaximumRowCount(10);
    cbLineWeight.setFont(new Font("Dialog", Font.PLAIN, 10)); // $NON-NLS-1$

    cbLineWeight.addItem(new String("1 px")); // $NON-NLS-1$
    cbLineWeight.addItem(new String("2 px")); // $NON-NLS-1$
    cbLineWeight.addItem(new String("3 px")); // $NON-NLS-1$
    cbLineWeight.addItem(new String("4 px")); // $NON-NLS-1$
    cbLineWeight.addItem(new String("5 px")); // $NON-NLS-1$
    cbLineWeight.addItem(new String("6 px")); // $NON-NLS-1$
    cbLineWeight.addItem(new String("7 px")); // $NON-NLS-1$
    cbLineWeight.addItem(new String("8 px")); // $NON-NLS-1$
    cbLineWeight.addItem(new String("9 px")); // $NON-NLS-1$
    cbLineWeight.addItem(new String("10 px")); // $NON-NLS-1$

    cbLineWeight.validate();

    cbLineWeight.setSelectedIndex(0);

    DefaultListCellRenderer drawRenderer =
        new DefaultListCellRenderer() {
          public Component getListCellRendererComponent(
              JList list, Object value, int modelIndex, boolean isSelected, boolean cellHasFocus) {
            if (list != null) {
              if (isSelected) {
                setBackground(list.getSelectionBackground());
                setForeground(list.getSelectionForeground());
              } else {
                setBackground(list.getBackground());
                setForeground(list.getForeground());
              }
            }

            setText((String) value);
            return this;
          }
        };

    cbLineWeight.setRenderer(drawRenderer);

    ActionListener drawActionListener =
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            int ind = cbLineWeight.getSelectedIndex();

            if (ind == 0) onUpdateLinkWeight(1);
            else if (ind == 1) onUpdateLinkWeight(2);
            else if (ind == 2) onUpdateLinkWeight(3);
            else if (ind == 3) onUpdateLinkWeight(4);
            else if (ind == 4) onUpdateLinkWeight(5);
            else if (ind == 5) onUpdateLinkWeight(6);
            else if (ind == 6) onUpdateLinkWeight(7);
            else if (ind == 7) onUpdateLinkWeight(8);
            else if (ind == 8) onUpdateLinkWeight(9);
            else if (ind == 9) onUpdateLinkWeight(10);
          }
        };
    cbLineWeight.addActionListener(drawActionListener);

    drawPanel.add(new JLabel(" "), BorderLayout.WEST); // $NON-NLS-1$
    drawPanel.add(cbLineWeight, BorderLayout.CENTER);
    return drawPanel;
  }
  /**
   * Create and return the toolbar with the node formatting options.
   *
   * @return UIToolBar, the toolbar with all the node formatting options.
   */
  private UIToolBar createToolBar(int orientation) {

    tbrToolBar =
        new UIToolBar(
            LanguageProperties.getString(
                LanguageProperties.TOOLBARS_BUNDLE, "UIToolBarFormatLink.name"),
            UIToolBar.NORTHSOUTH); // $NON-NLS-1$
    tbrToolBar.setOrientation(orientation);
    tbrToolBar.setEnabled(false);
    CSH.setHelpIDString(tbrToolBar, "toolbars.formatlink"); // $NON-NLS-1$

    GridBagLayout grid = new GridBagLayout();
    linkPanel = new JPanel(grid);
    linkColourPanel = new JPanel(new BorderLayout());
    linkColourPanel.setBackground(Color.black);

    JLabel label = new JLabel(" "); // $NON-NLS-1$
    GridBagConstraints con5 = new GridBagConstraints();
    con5.fill = GridBagConstraints.NONE;
    con5.anchor = GridBagConstraints.CENTER;
    grid.addLayoutComponent(label, con5);
    linkPanel.add(label);

    txtLinkColour = new JLabel(UIImages.get(BACKGROUND_COLOUR));
    txtLinkColour.setBorder(null);
    txtLinkColour.setToolTipText(
        LanguageProperties.getString(
            LanguageProperties.TOOLBARS_BUNDLE,
            "UIToolBarFormatLink.selectLinkColour")); //$NON-NLS-1$
    txtLinkColour.setEnabled(false);
    txtLinkColour.addMouseListener(
        new MouseAdapter() {
          public void mouseClicked(MouseEvent e) {
            int clickCount = e.getClickCount();
            if (clickCount == 1 && txtLinkColour.isEnabled()) {
              onUpdateLinkColour(linkColourPanel.getBackground().getRGB());
            }
          }
        });
    linkColourPanel.add(txtLinkColour, BorderLayout.CENTER);

    GridBagConstraints con = new GridBagConstraints();
    con.fill = GridBagConstraints.NONE;
    con.anchor = GridBagConstraints.CENTER;
    grid.addLayoutComponent(linkColourPanel, con);
    linkPanel.add(linkColourPanel);

    btLinkColour = new UIImageButton(UIImages.get(RIGHT_ARROW_ICON));
    btLinkColour.addMouseListener(
        new MouseAdapter() {
          public void mouseClicked(MouseEvent e) {
            int clickCount = e.getClickCount();
            if (clickCount == 1 && txtLinkColour.isEnabled()) {
              if (oColorChooserDialog != null) {
                oColorChooserDialog.setColour(selectedLinkColour);
              } else {
                oColorChooserDialog =
                    new UIColorChooserDialog(ProjectCompendium.APP, selectedLinkColour);
              }
              oColorChooserDialog.setVisible(true);
              Color oColour = oColorChooserDialog.getColour();
              oColorChooserDialog.setVisible(false);
              if (oColour != null) {
                linkColourPanel.setBackground(oColour);
                onUpdateLinkColour(oColour.getRGB());
              }
            }
          }
        });
    linkPanel.add(btLinkColour);

    label = new JLabel(" "); // $NON-NLS-1$
    GridBagConstraints con4 = new GridBagConstraints();
    con4.fill = GridBagConstraints.NONE;
    con4.anchor = GridBagConstraints.CENTER;
    grid.addLayoutComponent(label, con4);
    linkPanel.add(label);

    tbrToolBar.add(linkPanel);
    CSH.setHelpIDString(txtLinkColour, "toolbars.formatlink"); // $NON-NLS-1$

    tbrToolBar.add(createWeightChoiceBox());
    tbrToolBar.add(createArrowChoiceBox());
    tbrToolBar.add(createLinkStyleChoiceBox());
    tbrToolBar.add(createLinkDashedChoiceBox());

    return tbrToolBar;
  }