ui.java

问题描述] 利用哈夫曼编码进行信息通信可以大大提高信道利用率

package hartech.kids.huffman;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import hartech.ui.*;

/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Website: www.hartech.cn </p>
 * <p>Page: http://www.hartech.cn/blog/blogview.asp?logID=87 </p>
 * <p>Date: 2006-09-07 </p>
 */
public class UI extends JPanel {

	private static final long serialVersionUID = -915854684667413368L;

	static JPanel jpanel, jpanel_east;

	static JTextArea jtextArea_text, jtextArea_code;

	static JButton jbutton_code, jbutton_decode, jbutton_showHuffmanTree,
			jbutton_showCodes, jbutton_showFrequency;

	public UI() {
		super(new BorderLayout());

		// add
		add(jpanel(), BorderLayout.CENTER);
		add(jpanel_east(), BorderLayout.EAST);
	}

	static JPanel jpanel() {
		jtextArea_text = new JTextArea();
		jtextArea_text.setLineWrap(true);
		jtextArea_text.setBorder(BorderFactory.createEmptyBorder(2, 5, 0, 0));
		JScrollPane jScrollPane_text = new JScrollPane(jtextArea_text);
		jtextArea_text.setText(Main.default_text);

		jtextArea_code = new JTextArea();
		jtextArea_code.setLineWrap(true);
		jtextArea_code.setBorder(BorderFactory.createEmptyBorder(2, 5, 0, 0));
		JScrollPane jScrollPane_code = new JScrollPane(jtextArea_code);

		jbutton_code = new JButton("编码 ↓");
		;
		jbutton_code.addActionListener(new ActionListener_buttons());
		jbutton_code.setActionCommand("encode");

		jbutton_decode = new JButton("译码 ↑");
		jbutton_decode.addActionListener(new ActionListener_buttons());
		jbutton_decode.setActionCommand("decode");

		jpanel = new JPanel(new GridBagLayout());
		GridBagConstraints c = new GridBagConstraints();
		c.fill = GridBagConstraints.BOTH;

		c.weightx = 1.0;
		c.weighty = 1.0;

		c.gridwidth = 3;
		c.gridheight = 1;
		c.gridx = 0;
		c.gridy = 0;
		jpanel.add(jScrollPane_text, c);

		c.gridwidth = 1;
		c.gridheight = 1;
		c.gridx = 1;
		c.gridy = 1;
		jpanel.add(jbutton_code, c);

		c.gridwidth = 1;
		c.gridheight = 1;
		c.gridx = 2;
		c.gridy = 1;
		jpanel.add(jbutton_decode, c);

		c.gridx = 0;
		c.gridy = 2;
		c.gridwidth = 3;
		c.gridheight = 1;
		jpanel.add(jScrollPane_code, c);

		return jpanel;
	}

	static JPanel jpanel_east() {
		jbutton_showHuffmanTree = new JButton("显示哈夫曼树");
		jbutton_showHuffmanTree.addActionListener(new ActionListener_buttons());
		jbutton_showHuffmanTree.setActionCommand("tree");

		jbutton_showCodes = new JButton("显示编码表");
		jbutton_showCodes.addActionListener(new ActionListener_buttons());
		jbutton_showCodes.setActionCommand("codes");

		jbutton_showFrequency = new JButton("显示字母频率");
		jbutton_showFrequency.addActionListener(new ActionListener_buttons());
		jbutton_showFrequency.setActionCommand("fres");

		jpanel_east = new JPanel(new GridLayout(3, 1));
		jpanel_east.add(jbutton_showHuffmanTree);
		jpanel_east.add(jbutton_showCodes);
		jpanel_east.add(jbutton_showFrequency);
		return jpanel_east;
	}

	static void createDialog(String in, int with, int high) {
		Dialog dialog = new JDialog(Main.jFrame, false);

		JTextArea jtextArea = new JTextArea(in);
		jtextArea.setBorder(BorderFactory.createEmptyBorder(2, 5, 0, 0));
		JScrollPane jScrollPane = new JScrollPane(jtextArea);

		dialog.add(jScrollPane, BorderLayout.CENTER);
		//dialog.pack();
		dialog.setSize(with, high);
		J.goCenter(dialog);
		dialog.setVisible(true);
	}

}