[jList][checkBox]

J'ai eut le meme pb lors de la representation de JCheckBox dans un JTree.

Voici la solution que j'ai utilise meme si je ne la trouve pas super-elegante. En fait je n'etend pas : je delegue.
Code:
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  // NOTE: split back the renderer and the editor into two separate class as it provoked rendering issues when the editing occured.
 
  /** Class that serves as the tree renderer (displays check box).
   * @author Fabrice Bouyé (fabriceb@spc.int)
   * @version 1.0
   */
  private class CheckRenderer
      extends DefaultTreeCellRenderer {
    /** The delegated checkbox.
     */
    private JCheckBox check = new JCheckBox();
 
    /** Creates a new instance.
     */
    public CheckRenderer() {
      super();
      check.setOpaque(false);
      check.setHorizontalTextPosition(AbstractButton.LEADING);
      check.setFocusPainted(true);
    }
 
    /** {@inheritDoc}
     */
    public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) {
      //Component component = super.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, hasFocus);
      DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
      TreeCell cell = (TreeCell) node.getUserObject();
      //check.setForeground(component.getForeground());
      //check.setBackground(component.getBackground());
      check.setSelected(cell.displayed);
      check.setText(cell.screenname);
      check.setEnabled(cell.enabled);
      String tooltip = ExtendedConstants.HTML_LABEL_PREFIX + cell.description + ExtendedConstants.HTML_LABEL_SUFFIX;
      check.setToolTipText(tooltip);
      return check;
    }
  }
 
  /** Class that serves as the tree editor (displays check box).
   * @author Fabrice Bouyé (fabriceb@spc.int)
   * @version 1.0
   */
  private class CheckEditor
      extends DefaultTreeCellEditor implements ActionListener {
    /** The delegated checkbox.
     */
    private JCheckBox check = new JCheckBox();
 
    /** A hack that prevents the check box from beeing unselectd the first time the user clicks on it.
     */
    private boolean firstClick = true;
 
    /** The editor value.
     */
    private Object value;
 
    /** The previous value.
     */
    private boolean oldDisplayed;
 
    /** Creates a new instance.
     * @param displayTree The parent tree.
     */
    public CheckEditor(JTree displayTree) {
      super(displayTree, (DefaultTreeCellRenderer) displayTree.getCellRenderer());
      check.setOpaque(false);
      check.setHorizontalTextPosition(AbstractButton.LEADING);
      check.addActionListener(this);
      check.setFocusPainted(true);
    }
 
    /** {@inheritDoc}
     */
    public void cancelCellEditing() {
      super.cancelCellEditing();
      //DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
      //TreeCell cell = (TreeCell) node.getUserObject();
      //cell.displayed = oldDisplayed;
      //System.err.println("cancelCellEditing");
      firstClick = true;
    }
 
    /** {@inheritDoc}
     */
    public Object getCellEditorValue() {
      //System.err.println("getCellEditorValue");
      return value;
    }
 
    /** {@inheritDoc}
     */
    public boolean isCellEditable(EventObject anEvent) {
      //System.err.println("isCellEditable");
      boolean result = false;
      if (anEvent instanceof MouseEvent) {
        MouseEvent mouseEvent = (MouseEvent) anEvent;
        // How to detect the mouse click happened ontop of the check area, not on the check label?
        //if (mouseEvent.getClickCount() >= 2) {
        TreePath path = displayTree.getPathForLocation(mouseEvent.getX(), mouseEvent.getY());
        DefaultMutableTreeNode node = (DefaultMutableTreeNode) path.getLastPathComponent();
        TreeCell cell = (TreeCell) node.getUserObject();
        result = cell.enabled;
        //}
      }
      return result;
    }
 
    /** {@inheritDoc}
     */
    public boolean stopCellEditing() {
      boolean result = super.stopCellEditing();
      //System.err.println("stopCellEditing " + result);
      firstClick = true;
      return result;
    }
 
    /** {@inheritDoc}
     */
    public Component getTreeCellEditorComponent(JTree tree, Object value, boolean isSelected, boolean expanded, boolean leaf, int row) {
      //Component component = super.getTreeCellEditorComponent(tree, value, isSelected, expanded, leaf, row);
      //System.err.println("getTreeCellEditorComponent");
      this.value = value;
      DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
      TreeCell cell = (TreeCell) node.getUserObject();
      this.oldDisplayed = cell.displayed;
      //check.setForeground(component.getForeground());
      //check.setBackground(component.getBackground());
      check.setSelected(cell.displayed);
      check.setText(cell.screenname);
      check.setEnabled(cell.enabled);
      String tooltip = ExtendedConstants.HTML_LABEL_PREFIX + cell.description + ExtendedConstants.HTML_LABEL_SUFFIX;
      check.setToolTipText(tooltip);
      //firstClick = true;
      return check;
    }
 
    /** {@inheritDoc}
     */
    public void actionPerformed(ActionEvent event) {
      //System.err.println("actionPerformed");
      if (firstClick) {
        check.setSelected(!check.isSelected());
        firstClick = false;
        return;
      }
      DefaultMutableTreeNode node = (DefaultMutableTreeNode) getCellEditorValue();
      TreeCell treeCell = (TreeCell) node.getUserObject();
      boolean value = check.isSelected();
      treeCell.displayed = value;
      enableChildren(node, value);
      displayTree.repaint();
    }
 
    /** Enable/disable the children of the given node.
     * @param parent The parent node.
     * @param value If <CODE>true</CODE> the node will be disabled.
     */
    private void enableChildren(DefaultMutableTreeNode parent, boolean value) {
      int childNumber = parent.getChildCount();
      for (int i = 0; i < childNumber; i++) {
        DefaultMutableTreeNode child = (DefaultMutableTreeNode) parent.getChildAt(i);
        TreeCell cell = (TreeCell) child.getUserObject();
        cell.enabled = value;
        enableChildren(child, value);
      }
    }
  }
A toi maintenant de voir si c'est adaptable a des renderers et des editors pour des listes. Je n'aime pas trop cette solution mais elle a le merite de fonctionner (dans la plus part des cas en tout cas).