EditLeafSample.java Source code

Introduction

Here is the source code for EditLeafSample.java

Source

import java.awt.BorderLayout;
import java.util.EventObject;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeCellEditor;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeCellEditor;
import javax.swing.tree.TreeNode;

public class EditLeafSample {
    public static void main(String args[]) {
        JFrame frame = new JFrame("Editable Tree");
        JTree tree = new JTree();
        tree.setEditable(true);

        DefaultTreeCellRenderer renderer = (DefaultTreeCellRenderer) tree.getCellRenderer();
        TreeCellEditor editor = new LeafCellEditor(tree, renderer);
        tree.setCellEditor(editor);

        JScrollPane scrollPane = new JScrollPane(tree);
        frame.getContentPane().add(scrollPane, BorderLayout.CENTER);
        frame.setSize(300, 150);
        frame.setVisible(true);
    }
}

class LeafCellEditor extends DefaultTreeCellEditor {

    public LeafCellEditor(JTree tree, DefaultTreeCellRenderer renderer) {
        super(tree, renderer);
    }

    public LeafCellEditor(JTree tree, DefaultTreeCellRenderer renderer, TreeCellEditor editor) {
        super(tree, renderer, editor);
    }

    public boolean isCellEditable(EventObject event) {
        boolean returnValue = super.isCellEditable(event);
        if (returnValue) {
            Object node = tree.getLastSelectedPathComponent();
            if ((node != null) && (node instanceof TreeNode)) {
                TreeNode treeNode = (TreeNode) node;
                returnValue = treeNode.isLeaf();
            }
        }
        return returnValue;
    }
}