Multiline tooltip for JComboBox items.

Question

Hi, As the title suggests I'd like to create a multiline tooltip for items in a combobox list.
I have implemented a multiline tooltip renderer which works perfectly on any component except JComboBox items.
I have also implemented a ListCellRenderer for a combobox that enables tooltips for the combobox items. Also works perfectly, except that they are single line tooltips.
The tooltip text is read from an xml file, therefore I have no control on how long the line of text is. Most of the time the text also contains newlines.
This is the method (overridden from JComponent) added to a subclass of a component so that that component uses the MultiLineToolTip:
    public JToolTip createToolTip() {
        MultiLineToolTip tip = new MultiLineToolTip(this);
        tip.setComponent(this);
        return tip;
    }And this is the ListCellRenderer used on the combobox, so that items have (single-line) tooltips enabled:
    private class ToolTipEnabledComboBoxRenderer extends JLabel implements ListCellRenderer{
         public ToolTipEnabledComboBoxRenderer(){
              setOpaque(true);
         public Component getListCellRendererComponent(JList list,Object value,
                                                          int index,boolean isSelected,
                                                          boolean cellHasFocus) {
              String entry = (String)value;
              if (isSelected || cellHasFocus) {
                   this.setBackground(list.getSelectionBackground());
                   setForeground(list.getSelectionForeground());
              } else {
                   this.setBackground(list.getBackground());
                   setForeground(list.getForeground());
              this.setText(entry);
              if(isSelected || cellHasFocus){
                   if(constraint!=null &&combobox!=null &&
                               constraint.getType() == Constrained.CONTROLLED_VOCABULARY){
                        String tooltip = ((ControlledVocabulary)constraint).getEntryDescription(entry);
                        if(tooltip==null || tooltip.equals("")){
                             tooltip="";
                        list.setToolTipText(tooltip);
              return this;
    }It seems to me that what I have to do is subclass the list used by the combobox and override the createToolTip() method. But how can I set the list used by the combobox? As far as I know the only time I can access the list is in the getListCellRendererComponent() method of the ListCellRenderer, in which the list is a parameter.
Any ideas?
Don

Answer 1

Hello,
<p>Have you seen this one?</p>
Francois