Source Code : Tree Cell Renderer

Java Is Open Source Programming Language You Can Download From Java and Java Libraries From http://www.oracle.com. Click Here to download
We provide this code related to title for you to solve your developing problem easily. Libraries which is import in this program you can download from http://www.oracle.com. Click Here or search from google with Libraries Name you get jar file related it

Tree Cell Renderer

  
/*
Definitive Guide to Swing for Java 2, Second Edition
By John Zukowski     
ISBN: 1-893115-78-X
Publisher: APress
*/

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.GridLayout;
import java.util.Vector;

import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeCellRenderer;

public class BookTree {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Book Tree");
    Book javaBooks[] = {
        new Book("Core Java 2 Fundamentals", "Cornell/Horstmann",
            42.99f),
        new Book("Taming Java Threads", "Holub", 34.95f),
        new Book("JavaServer  Pages", "Pekowsky", 39.95f) };
    Book htmlBooks[] = { new Book("Dynamic HTML", "Goodman", 39.95f),
        new Book("HTML 4 Bible", "Pfaffenberger/Gutzman", 49.99f) };
    Vector javaVector = new NamedVector("Java Books", javaBooks);
    Vector htmlVector = new NamedVector("HTML Books", htmlBooks);
    Object rootNodes[] = { javaVector, htmlVector };
    Vector rootVector = new NamedVector("Root", rootNodes);
    JTree tree = new JTree(rootVector);
    TreeCellRenderer renderer = new BookCellRenderer();
    tree.setCellRenderer(renderer);
    JScrollPane scrollPane = new JScrollPane(tree);
    frame.getContentPane().add(scrollPane, BorderLayout.CENTER);
    frame.setSize(300, 300);
    frame.setVisible(true);
  }
}

class Book {
  String title;

  String authors;

  float price;

  public Book(String title, String authors, float price) {
    this.title = title;
    this.authors = authors;
    this.price = price;
  }

  public String getTitle() {
    return title;
  }

  public String getAuthors() {
    return authors;
  }

  public float getPrice() {
    return price;
  }
}

class BookCellRenderer implements TreeCellRenderer {
  JLabel titleLabel;

  JLabel authorsLabel;

  JLabel priceLabel;

  JPanel renderer;

  DefaultTreeCellRenderer defaultRenderer = new DefaultTreeCellRenderer();

  Color backgroundSelectionColor;

  Color backgroundNonSelectionColor;

  public BookCellRenderer() {
    renderer = new JPanel(new GridLayout(0, 1));
    titleLabel = new JLabel(" ");
    titleLabel.setForeground(Color.blue);
    renderer.add(titleLabel);
    authorsLabel = new JLabel(" ");
    authorsLabel.setForeground(Color.blue);
    renderer.add(authorsLabel);
    priceLabel = new JLabel(" ");
    priceLabel.setHorizontalAlignment(JLabel.RIGHT);
    priceLabel.setForeground(Color.red);
    renderer.add(priceLabel);
    renderer.setBorder(BorderFactory.createLineBorder(Color.black));
    backgroundSelectionColor = defaultRenderer
        .getBackgroundSelectionColor();
    backgroundNonSelectionColor = defaultRenderer
        .getBackgroundNonSelectionColor();
  }

  public Component getTreeCellRendererComponent(JTree tree, Object value,
      boolean selected, boolean expanded, boolean leaf, int row,
      boolean hasFocus) {
    Component returnValue = null;
    if ((value != null) && (value instanceof DefaultMutableTreeNode)) {
      Object userObject = ((DefaultMutableTreeNode) value)
          .getUserObject();
      if (userObject instanceof Book) {
        Book book = (Book) userObject;
        titleLabel.setText(book.getTitle());
        authorsLabel.setText(book.getAuthors());
        priceLabel.setText("" + book.getPrice());
        if (selected) {
          renderer.setBackground(backgroundSelectionColor);
        } else {
          renderer.setBackground(backgroundNonSelectionColor);
        }
        renderer.setEnabled(tree.isEnabled());
        returnValue = renderer;
      }
    }
    if (returnValue == null) {
      returnValue = defaultRenderer.getTreeCellRendererComponent(tree,
          value, selected, expanded, leaf, row, hasFocus);
    }
    return returnValue;
  }
}

class NamedVector extends Vector {
  String name;

  public NamedVector(String name) {
    this.name = name;
  }

  public NamedVector(String name, Object elements[]) {
    this.name = name;
    for (int i = 0, n = elements.length; i < n; i++) {
      add(elements[i]);
    }
  }

  public String toString() {
    return "[" + name + "]";
  }
}

           
         
    
  

Thank with us