debugwindow.java

效率较高的文件压缩算法

/*
 * Copyright (C) 2003-2004 Andrew Smith
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place, Suite 330, Boston, MA 02111-1307 USA
 */

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileWriter;
import java.util.Calendar;
import java.util.Date;

import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.ScrollPaneConstants;

public class DebugWindow extends JFrame implements ActionListener {

    private static JFrame df;

    private static JPanel buttonPanel;

    private static JButton clearTextArea, saveTextArea, closeDebugWindow;

    private static JScrollPane scrollPane;

    private static JTextArea textArea;

    private static Jrar jrar;

    public DebugWindow(Jrar j) {
        jrar = j;
        df = new JFrame("Debug output");

        textArea = new JTextArea("Debugging On\n", 20, 40);
        textArea.setEditable(false);

        scrollPane = new JScrollPane(textArea,
                ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,
                ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        df.getContentPane().add("Center", scrollPane);

        buttonPanel = new JPanel();
        buttonPanel.setLayout(new BoxLayout(buttonPanel, BoxLayout.LINE_AXIS));
        clearTextArea = new JButton("Clear");
        clearTextArea.addActionListener(this);
        clearTextArea.setToolTipText("Clear the contents of the text area");
        saveTextArea = new JButton("Save output");
        saveTextArea.addActionListener(this);
        saveTextArea
                .setToolTipText("Save the output from the text area to JrarDebugOutput.txt");
        closeDebugWindow = new JButton("Stop Debuging");
        closeDebugWindow.addActionListener(this);
        closeDebugWindow
                .setToolTipText("Close this window and stops the debug output");

        buttonPanel.add(clearTextArea);
        buttonPanel.add(saveTextArea);
        buttonPanel.add(closeDebugWindow);
        df.getRootPane().setDefaultButton(saveTextArea);
        df.getContentPane().add("South", buttonPanel);

        df.pack();
        df.setLocation(0, 0);
        df.setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == clearTextArea) {
            textArea.setText("");
        } else if (e.getSource() == closeDebugWindow) {
            df.dispose();
            jrar.stopDebugging();
        } else if (e.getSource() == saveTextArea) {
            try {
                Date d = new Date();
                Calendar c = Calendar.getInstance();
                String fileName = "JrarDebugOutput-" + c.get(Calendar.YEAR)
	                + "-" + c.get(Calendar.MONTH) + "-"
	                + c.get(Calendar.DAY_OF_MONTH) + ".txt";
                File f = new File(fileName);
                FileWriter fw = new FileWriter(f, true);

                if (!f.exists()) {
                    f.createNewFile();
                }

                String textToWrite = "\n" + d.toString()
                        + "\n----- Start debug output -----\n"
                        + "Using version " + JrarConstants.JRARVERSION + "\n\n"
                        + textArea.getText()
                        + "------ End debug output ------\n\n";

                fw.write(textToWrite);

                fw.flush();
                fw.close();

            } catch (Exception ex) {
                addDebugOutput("Error: " + ex);
            }
        }
    }

    public void addDebugOutput(String s) {
        s.trim();
        textArea.append(s + "\n");
        textArea.setCaretPosition(textArea.getDocument().getLength());
    }

    public void debugFrameVisiability() {
        df.setVisible(!df.isVisible());
    }
}