Free "tail -f" Tool for all Platforms: Tail for Windows, Tail for Linux and Tail for Mac

/******************************************************************************
 
Copyright (C) 2006  MakeLogic

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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA


Date		: 14th April 2006
Authors		: MakeLogic

Design		: Ujjwal
Developer	: Dharma

********************************************************************************/


package com.makeLogic.utils;

import java.awt.*;
import java.io.PrintStream;
import java.io.*;
import javax.swing.*;
import javax.swing.text.html.*;
import javax.swing.event.*;
import javax.swing.border.EtchedBorder;
import com.makeLogic.*;

public class HelpDialog extends JDialog{

	int height;
	int width;

	public HelpDialog(JFrame owner){
		
		//..Call the super class
		super(owner);

		Trace.enter("HelpDialog.HelpDialog");
		
		setTitle("Help - Usage");
		getContentPane().setLayout(new BorderLayout());
		setModal(true);

		//..Show the help doc in HTML View
		JEditorPane editorPane = new JEditorPane();
		editorPane.setEditorKit(new HTMLEditorKit()); 

		//..Get current classloader 
		ClassLoader cl = this.getClass().getClassLoader();
		Toolkit toolkit = Toolkit.getDefaultToolkit();

		String html = getHTML(cl.getResourceAsStream("description.html"));

		editorPane.setText(html);

		editorPane.setEditable(false);
		editorPane.getAutoscrolls();
		editorPane.addHyperlinkListener(new HyperActive());
		editorPane.setBorder(new EtchedBorder());
		
		getContentPane().add(editorPane, "Center");

		height = 600;
		width = 800;
		Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();
		setLocation((dimension.width - width) / 2, (dimension.height - height) / 2);
		setSize(width, height);
		setResizable(false);

		Trace.exit("HelpDialog.HelpDialog");
	}

	public String getHTML(InputStream htmlStream)
	{
		String returnHtml = "";
		String line = "";

		try
		{
			DataInputStream dis = new DataInputStream(htmlStream);

			while(true)
			{
				line = dis.readLine();

				if(line != null)
				{
					returnHtml += line;
				}
				else
				{
					break;
				}
			}

			return returnHtml;
		}
		catch(Exception ex)
		{
			return "";
		}
	}
}