//
//Brian Jahns
//Java 290
//PartyText applet Exercise 19
//

import java.applet.*;
import java.awt.*;

public class PartyText extends Applet implements Runnable
{
	private char[] m_SeparatedDisplayText;
	private int m_nCharIndex;
	private int m_nColorIndex;
	private Color[] m_TextColors={Color.red,Color.black,Color.white,Color.yellow};
	private Thread m_PartyText=null;
	private String m_DisplayText="No Parameter Given";
	private final String PARAM_DisplayText="DisplayText";

	public PartyText()
	{
	}

	public String getAppletInfo()
	{
		return "Name: PartyText\r\n" +
		       "Author: Brian Jahns\r\n" +
		       "Created with Microsoft Visual J++ Version 1.1";
	}

	public String[][] getParameterInfo()
	{
		String[][] info=
		{
			{PARAM_DisplayText, "String","Input parameter"},
		};
		return info;
	}

	public void init()
	{
		String param;
		param=getParameter(PARAM_DisplayText);
		if(param !=null)
			m_DisplayText=param;
		setBackground(Color.white);
		resize(425, 100);

		m_SeparatedDisplayText=new char[m_DisplayText.length()];
		m_DisplayText.getChars(0,m_DisplayText.length(),m_SeparatedDisplayText,0);
		setFont(new Font("TimesRoman",Font.BOLD,36));
	}

	public void destroy()
	{
	}

	public void paint(Graphics g)
	{
		int x_coord;
		int y_coord;
		for(m_nCharIndex=0;m_nCharIndex<m_SeparatedDisplayText.length;m_nCharIndex++)
		{
			g.setColor(m_TextColors[m_nColorIndex]);
			if(m_nColorIndex==3)
				m_nColorIndex=0;
			else
				m_nColorIndex++;
			x_coord=(int)(Math.random()*10+15*m_nCharIndex);
			y_coord=(int)(Math.random()*10+36);
			g.drawChars(m_SeparatedDisplayText,m_nCharIndex,1,x_coord,y_coord);
		}
	}

	public void start()
	{
		if(m_PartyText==null)
		{
			m_PartyText=new Thread(this);
			m_PartyText.start();
		}
	}
	
	public void stop()
	{
		if(m_PartyText!=null)
		{
			m_PartyText.stop();
			m_PartyText=null;
		}
	}

	public void run()
	{
		while(true)
		{
			try
			{
				repaint();
				Thread.sleep(100);
			}
			catch(InterruptedException e)
			{
				stop();
			}
		}
	}
}