jtreedemo.java

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/*
 * $Header$
 * $Date$ 
 * $Revision$
 * Copyright (C) 2003-2004 CIC, Tsinghua Univ. 
 */
package jcase.gui.swing;
import java.awt.BorderLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreePath;
/**
 * JTreeDemo
 */
public class JTreeDemo extends BaseSwingDemo {
	JTextField jtf;
	JTree tree;
	protected void init() {
		setLayout(new BorderLayout());
		add(createTree(), BorderLayout.CENTER);
		jtf = new JTextField(30);
		add(jtf, BorderLayout.SOUTH);
	}
	/**
	 * @see jcase.gui.swing.BaseSwingDemo#getTitle()
	 */
	public String getTitle() {		
		return "JTreeDemo";
	}
	public JScrollPane createTree() {
		DefaultMutableTreeNode top = new DefaultMutableTreeNode("音乐");
		DefaultMutableTreeNode classical = new DefaultMutableTreeNode("古典");
		DefaultMutableTreeNode pop = new DefaultMutableTreeNode("流行音乐");
		DefaultMutableTreeNode jazz = new DefaultMutableTreeNode("爵士");
		DefaultMutableTreeNode rock = new DefaultMutableTreeNode("摇滚");
		top.add(classical);
		top.add(pop);
		top.add(jazz);
		top.add(rock);
		
		classical.add(new DefaultMutableTreeNode("Beethoven-Six String Quartets"));
		classical.add(new DefaultMutableTreeNode("Beethoven-Grosse Fugue for String Quartets"));
		classical.add(new DefaultMutableTreeNode("Mozart-Piano Concerto No. 12"));
		
		pop.add(new DefaultMutableTreeNode("Celine Dion-Another Year Has Gone By"));
		pop.add(new DefaultMutableTreeNode("Celine Dion-Because You Loved Me"));
		pop.add(new DefaultMutableTreeNode("Faye Wang-Eys On Me"));
		
		jazz.add(new DefaultMutableTreeNode("Albert Ayler-My Name is Albert Ayler"));
		jazz.add(new DefaultMutableTreeNode("Albert Ayler-Billie's Bounce"));
		jazz.add(new DefaultMutableTreeNode("Chet Baker-Let's Get Lost"));
		jazz.add(new DefaultMutableTreeNode("Chet Baker-This Is Always"));
		
		DefaultMutableTreeNode beetle = new DefaultMutableTreeNode("The Beetles");
		beetle.add(new DefaultMutableTreeNode("A Hard Day's Night"));
		beetle.add(new DefaultMutableTreeNode("If I Fell"));		
		rock.add(beetle);
		DefaultMutableTreeNode garv = new DefaultMutableTreeNode("Harvin Garvel");
		garv.add(new DefaultMutableTreeNode("Is This Real"));
		garv.add(new DefaultMutableTreeNode("Simple Life"));
		garv.add(new DefaultMutableTreeNode("Just A Dog"));
		rock.add(garv);
		rock.add(new DefaultMutableTreeNode("Steve Miller Band-Fly Like An Eagle"));
		
		tree = new JTree(top);
		tree.addMouseListener(new MouseAdapter() {
			public void mouseClicked(MouseEvent me) {
				showSelect(me);
			}
		});
		
		return new JScrollPane(tree);
	}
	
	private void showSelect(MouseEvent me){
		TreePath tp = tree.getPathForLocation(me.getX(), me.getY());
		if (tp != null)
			jtf.setText(tp.toString());
		else
			jtf.setText("");

	}
}