Java Swing Tips: TreeCellEditor

Showing posts with label TreeCellEditor. Show all posts

2017/05/30

Use JComboBox as JTree's node cell editor

Code

class PluginCellEditor extends DefaultCellEditor {
  private final PluginPanel panel;
  private transient Node node;

  public PluginCellEditor(JComboBox<String> comboBox) {
    super(comboBox);
    panel = new PluginPanel(comboBox);
  }

  @Override public Component getTreeCellEditorComponent(
      JTree tree, Object value, boolean selected, boolean expanded,
      boolean leaf, int row) {
    Node node = panel.extractNode(value);
    panel.setContents(node);
    this.node = node;
    return panel;
  }

  @Override public Object getCellEditorValue() {
    Object o = super.getCellEditorValue();
    if (node == null) {
      return o;
    }
    DefaultComboBoxModel<String> m =
        (DefaultComboBoxModel<String>) panel.comboBox.getModel();
    Node n = new Node(panel.pluginName.getText(), node.plugins);
    n.setSelectedPluginIndex(m.getIndexOf(o));
    return n;
  }

  @Override public boolean isCellEditable(EventObject e) {
    Object source = e.getSource();
    if (!(source instanceof JTree) || !(e instanceof MouseEvent)) {
      return false;
    }
    JTree tree = (JTree) source;
    MouseEvent me = (MouseEvent) e;
    TreePath path = tree.getPathForLocation(me.getX(), me.getY());
    if (path == null) {
      return false;
    }
    Object node = path.getLastPathComponent();
    if (!(node instanceof DefaultMutableTreeNode)) {
      return false;
    }
    Rectangle r = tree.getPathBounds(path);
    if (r == null) {
      return false;
    }
    Dimension d = panel.getPreferredSize();
    r.setSize(new Dimension(d.width, r.height));
    if (r.contains(me.getX(), me.getY())) {
      showComboPopup(tree, me);
      return true;
    }
    return delegate.isCellEditable(e);
  }

  private void showComboPopup(final JTree tree, final MouseEvent me) {
    EventQueue.invokeLater(new Runnable() {
      @Override public void run() {
        Point pt = SwingUtilities.convertPoint(tree, me.getPoint(), panel);
        Component o = SwingUtilities.getDeepestComponentAt(panel, pt.x, pt.y);
        if (o instanceof JComboBox) {
          panel.comboBox.showPopup();
        } else if (o != null) {
          Container c = SwingUtilities.getAncestorOfClass(
              JComboBox.class, (Component) o);
          if (c instanceof JComboBox) {
            panel.comboBox.showPopup();
          }
        }
      }
    });
  }
}

References

2013/03/30

JTree node edit only from JPopupMenu

Code

tree.setCellEditor(new DefaultTreeCellEditor(
    tree, (DefaultTreeCellRenderer) tree.getCellRenderer()) {
  @Override public boolean isCellEditable(EventObject e) {
    return !(e instanceof MouseEvent) && super.isCellEditable(e);
  }

  // @Override protected boolean canEditImmediately(EventObject e) {
  //   // ((MouseEvent) e).getClickCount() > 2
  //   return (e instanceof MouseEvent) ? false : super.canEditImmediately(e);
  // }
});
tree.setEditable(true);
tree.setComponentPopupMenu(new TreePopupMenu());

// ...
public TreePopupMenu() {
  super();
  add(new JMenuItem(new AbstractAction("Edit") {
    @Override public void actionPerformed(ActionEvent e) {
      JTree tree = (JTree) getInvoker();
      if (path != null) {
        tree.startEditingAtPath(path);
      }
    }
  }));
  add(new JMenuItem(new AbstractAction("Edit Dialog") {
    @Override public void actionPerformed(ActionEvent e) {
      JTree tree = (JTree) getInvoker();
      if (path == null) {
        return;
      }
      Object node = path.getLastPathComponent();
      if (node instanceof DefaultMutableTreeNode) {
        DefaultMutableTreeNode leaf = (DefaultMutableTreeNode) node;
        textField.setText(leaf.getUserObject().toString());
        int result = JOptionPane.showConfirmDialog(
            tree, textField, "Rename",
            JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE);
        if (result == JOptionPane.OK_OPTION) {
          String str = textField.getText();
          if (!str.trim().isEmpty()) {
            ((DefaultTreeModel) tree.getModel()).valueForPathChanged(path, str);
          }
        }
      }
    }
  }));
  // ...

References

JTree node edit only from JPopupMenu(Japanese)

2012/02/06

JCheckBox Node JTree

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 instanceof DefaultMutableTreeNode) {
      this.setEnabled(tree.isEnabled());
      this.setFont(tree.getFont());
      Object userObject = ((DefaultMutableTreeNode) value).getUserObject();
      if (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 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.getPoint())) {
        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)

2011/08/29

FileSystemTree with JCheckBox

Code

class CheckBoxNodeEditor extends TriStateCheckBox implements TreeCellEditor {
  private final FileSystemView fileSystemView;
  private final JPanel panel = new JPanel(new BorderLayout());
  private DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer();
  private File file;

  public CheckBoxNodeEditor(FileSystemView fileSystemView) {
    super();
    this.fileSystemView = fileSystemView;
    this.addActionListener(new ActionListener() {
      @Override public void actionPerformed(ActionEvent e) {
        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());
    setOpaque(false);
    if (value instanceof DefaultMutableTreeNode) {
      this.setEnabled(tree.isEnabled());
      this.setFont(tree.getFont());
      Object userObject = ((DefaultMutableTreeNode) value).getUserObject();
      if (userObject instanceof CheckBoxNode) {
        CheckBoxNode node = (CheckBoxNode) userObject;
        if (node.status == Status.INDETERMINATE) {
          setIcon(new IndeterminateIcon());
        } else {
          setIcon(null);
        }
        file = node.file;
        l.setIcon(fileSystemView.getSystemIcon(file));
        l.setText(fileSystemView.getSystemDisplayName(file));
        setSelected(node.status == Status.SELECTED);
      }
      // panel.add(this, BorderLayout.WEST);
      panel.add(l);
      return panel;
    }
    return l;
  }

  @Override public Object getCellEditorValue() {
    return new CheckBoxNode(file, isSelected() ? Status.SELECTED : Status.DESELECTED);
  }

  @Override public boolean isCellEditable(EventObject e) {
    if (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 (file == 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));
        // }
        return true;
      }
    }
    return false;
  }

  @Override public void updateUI() {
    super.updateUI();
    if (panel != null) {
      panel.updateUI();
    }
    // 1.6.0_24 bug??? @see 1.7.0 DefaultTreeCellRenderer#updateUI()
    renderer = new DefaultTreeCellRenderer();
  }
// ...

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2017/05/30

Use JComboBox as JTree's node cell editor

Code

References

2013/03/30

JTree node edit only from JPopupMenu

Code

References

2012/02/06

JCheckBox Node JTree

Code

References

2011/08/29

FileSystemTree with JCheckBox

Code

References