JCheckBox Node JTree

• download example.jar
• download src.zip
• repository

Code

class CheckBoxNodeEditor extends TriStateCheckBox implements TreeCellEditor {
  private DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer();
  private final JPanel panel = new JPanel(new BorderLayout());
  private String str = null;
  public CheckBoxNodeEditor() {
    super();
    this.addActionListener(new ActionListener() {
      @Override public void actionPerformed(ActionEvent e) {
        //System.out.println("actionPerformed: stopCellEditing");
        stopCellEditing();
      }
    });
    panel.setFocusable(false);
    panel.setRequestFocusEnabled(false);
    panel.setOpaque(false);
    panel.add(this, BorderLayout.WEST);
    this.setOpaque(false);
  }
  @Override public Component getTreeCellEditorComponent(
      JTree tree, Object value, boolean isSelected,
      boolean expanded, boolean leaf, int row) {
    JLabel l = (JLabel)renderer.getTreeCellRendererComponent(
        tree, value, true, expanded, leaf, row, true);
    l.setFont(tree.getFont());
    if(value != null && value instanceof DefaultMutableTreeNode) {
      this.setEnabled(tree.isEnabled());
      this.setFont(tree.getFont());
      Object userObject = ((DefaultMutableTreeNode)value).getUserObject();
      if(userObject!=null && userObject instanceof CheckBoxNode) {
        CheckBoxNode node = (CheckBoxNode)userObject;
        if(node.status==Status.INDETERMINATE) {
          setIcon(new IndeterminateIcon());
        }else{
          setIcon(null);
        }
        l.setText(node.label);
        setSelected(node.status==Status.SELECTED);
        str = node.label;
      }
      //panel.add(this, BorderLayout.WEST);
      panel.add(l);
      return panel;
    }
    return l;
  }
  @Override public Object getCellEditorValue() {
    return new CheckBoxNode(str, isSelected()?Status.SELECTED:Status.DESELECTED);
  }
  @Override public boolean isCellEditable(EventObject e) {
    if(e != null && e instanceof MouseEvent && e.getSource() instanceof JTree) {
      MouseEvent me = (MouseEvent)e;
      JTree tree = (JTree)e.getSource();
      TreePath path = tree.getPathForLocation(me.getX(), me.getY());
      Rectangle r = tree.getPathBounds(path);
      if(r==null) return false;
      Dimension d = getPreferredSize();
      r.setSize(new Dimension(d.width, r.height));
      if(r.contains(me.getX(), me.getY())) {
        if(str==null && System.getProperty("java.version").startsWith("1.7.0")) {
          System.out.println("XXX: Java 7, only on first run\n"+getBounds());
          setBounds(new Rectangle(0,0,d.width,r.height));
        }
        //System.out.println(getBounds());
        return true;
      }
    }
    return false;
  }
  @Override public void updateUI() {
    super.updateUI();
    setName("Tree.cellEditor");
    if(panel!=null) {
      //panel.removeAll(); //??? Change to Nimbus LnF, JDK 1.6.0
      panel.updateUI();
      //panel.add(this, BorderLayout.WEST);
    }
    //???#1: JDK 1.6.0 bug??? @see 1.7.0 DefaultTreeCellRenderer#updateUI()
    //if(System.getProperty("java.version").startsWith("1.6.0")) {
    //  renderer = new DefaultTreeCellRenderer();
    //}
  }
//...

References

• JCheckBox Node JTree(Japanese)