treedemo.java

主要为一个空间信息管理系统

/*
 * Copyright (c) 2003 Sun Microsystems, Inc. All  Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * -Redistributions of source code must retain the above copyright
 *  notice, this list of conditions and the following disclaimer.
 *
 * -Redistribution in binary form must reproduct the above copyright
 *  notice, this list of conditions and the following disclaimer in
 *  the documentation and/or other materials provided with the distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT
 * BE LIABLE FOR ANY DAMAGES OR LIABILITIES SUFFERED BY LICENSEE AS A RESULT
 * OF OR RELATING TO USE, MODIFICATION OR DISTRIBUTION OF THE SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE SOFTWARE, EVEN
 * IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that Software is not designed, licensed or intended for
 * use in the design, construction, operation or maintenance of any nuclear
 * facility.
 */

/*
 * @(#)TreeDemo.java	1.7 03/01/23
 */

package com.sunking.swing;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
import javax.accessibility.*;

import java.awt.*;
import java.awt.event.*;
import java.beans.*;
import java.util.*;
import java.io.*;
import java.applet.*;
import java.net.*;

/**
 * JTree Demo
 *
 * @version 1.7 01/23/03
 * @author Jeff Dinkins
 */
public class TreeDemo extends DemoModule {

    /**
     * main method allows us to run as a standalone demo.
     */
    public static void main(String[] args) {
	TreeDemo demo = new TreeDemo(null);
	demo.mainImpl();
    }

    /**
     * TreeDemo Constructor
     */
    public TreeDemo(SwingSet2 swingset) {
	// Set the title for this demo, and an icon used to represent this
	// demo inside the SwingSet2 app.
	super(swingset, "TreeDemo", "toolbar/JTree.gif");

	getDemoPanel().add(createTree(), BorderLayout.CENTER);
    }

    public JScrollPane createTree() {
        DefaultMutableTreeNode top = new DefaultMutableTreeNode(getString("TreeDemo.music"));
        DefaultMutableTreeNode catagory = null ;
	DefaultMutableTreeNode artist = null;
	DefaultMutableTreeNode record = null;

	// open tree data
	URL url = getClass().getResource("/resources/tree.txt");

	try {
	    // convert url to buffered string
	    InputStream is = url.openStream();
	    InputStreamReader isr = new InputStreamReader(is);
	    BufferedReader reader = new BufferedReader(isr);

	    // read one line at a time, put into tree
	    String line = reader.readLine();
	    while(line != null) {
		// System.out.println("reading in: ->" + line + "<-");
		char linetype = line.charAt(0);
		switch(linetype) {
		   case 'C':
		     catagory = new DefaultMutableTreeNode(line.substring(2));
		     top.add(catagory);
		     break;
		   case 'A':
		     if(catagory != null) {
		         catagory.add(artist = new DefaultMutableTreeNode(line.substring(2)));
		     }
		     break;
		   case 'R':
		     if(artist != null) {
		         artist.add(record = new DefaultMutableTreeNode(line.substring(2)));
		     }
		     break;
		   case 'S':
		     if(record != null) {
		         record.add(new DefaultMutableTreeNode(line.substring(2)));
		     }
		     break;
		   default:
		     break;
		}
		line = reader.readLine();
	    }
	} catch (IOException e) {
	}

	JTree tree = new JTree(top) {
	    public Insets getInsets() {
		return new Insets(5,5,5,5);
	    }
	};
	return new JScrollPane(tree);
    }

}