extends JLabel implements TreeCellRenderer : JTree Editor Renderer « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JTree Editor Renderer

import java.awt.BorderLayout;
import java.awt.Component;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeCellRenderer;
import javax.swing.tree.TreeModel;

public class TreeCellRendererImplementation extends JFrame {

  public TreeCellRendererImplementation() {
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    DefaultMutableTreeNode root = new DefaultMutableTreeNode("+");
    root.add(new DefaultMutableTreeNode(new Integer(3)));
    DefaultMutableTreeNode node = new DefaultMutableTreeNode("*");
    node.add(new DefaultMutableTreeNode("string"));
    node.add(new DefaultMutableTreeNode(new Short((short) 5)));
    root.add(node);

    TreeModel tm = new DefaultTreeModel(root);
    JTree tree = new JTree(tm);
    tree.setShowsRootHandles(true);
    tree.setCellRenderer(new MyRenderer());
    getContentPane().add(tree, BorderLayout.CENTER);
    setSize(400, 300);
    setVisible(true);
  }

  private class MyRenderer extends JLabel implements TreeCellRenderer {
    public Component getTreeCellRendererComponent(JTree tree, Object value, boolean isSelected,
        boolean isExpanded, boolean isLeaf, int row, boolean hasFocus) {
      Object userObject = ((DefaultMutableTreeNode) value).getUserObject();
      setText(value.toString() + " [" + userObject.getClass().getName() + "]");
      return this;
    }
  }

  public static void main(String[] args) {
    TreeCellRendererImplementation m = new TreeCellRendererImplementation();
  }
}

14.69.JTree Editor Renderer
	14.69.1.	Getting Default TreeCellRenderer From JTree
	14.69.2.	extends JLabel implements TreeCellRenderer
	14.69.3.	Creating a Custom Renderer
	14.69.4.	Working with Tree Tooltips: using a Tooltip Cell Renderer
	14.69.5.	Editing Tree Nodes with triple clicking
	14.69.6.	Creating a DefaultCellEditor: JTextField
	14.69.7.	Creating a DefaultCellEditor: JComboBox
	14.69.8.	Creating a DefaultCellEditor: JCheckBox
	14.69.9.	Creating a Proper ComboBox Editor for a Tree
	14.69.10.	Creating an Editor Just for Leaf Nodes
	14.69.11.	Rendering an image in a JTable column
	14.69.12.	Setting the Activation Click Count for a Table Cell Editor in a JTable Component
	14.69.13.	Using DefaultTreeCellRenderer
	14.69.14.	Changing and Removing the Default Icons in a JTree Component
	14.69.15.	Use UIManager to change the default icon for JTree
	14.69.16.	Flush the internal cache of Row height