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

/**
 * This class reads PARAM tags from its HTML host page and sets
 * the color and label properties of the applet. Program execution
 * begins with the init() method. 
 */
public class fonts extends Applet implements Runnable  //'Implements runnable' es requerido para crear la marquesina.
{
	/**
	 * The entry point for the applet. 
	 */
	//protected void Paint(Graphics g)
	//{
	//	g.drawString("Hello Visual J++ World!",100,100);
	//}	

	// Este codigo declara/inicializa los elementos requeridos para desplegar texto tipo marquesina
	private Thread m_fonts = null;
	int x = 740;
	int y = 380;
	Font font5 = new Font("MONOSPACED",Font.BOLD,15);
	String m_strMessage = "This 'Marquee' text, as well as all other lines in this applet, were drawn using the 'Graphics' class. This line uses 'font 5' (MONOSPACED,Font.BOLD,15) and 'Color.red'";
	//**********************************************************************************************
		
	
	public void init()
	{

		//initForm();		Estas dos lineas fueron comentadas para evitar desplegar
		//usePageParams();	El mensaje generico "This string was ..." y el color de fondo (default)

		// TODO: Add any constructor code after initForm call.
		
				
		Label label1, label2; 
		label1 = new Label("                                 Java's Fonts, text and colors.                              ",Label.CENTER);
		label2 = new Label("                                       (by Lucio Gayosso).                                   ",Label.CENTER);
 
		Font font = new Font("Helvetica", Font.BOLD,14);
		label1.setFont(font);
		label2.setFont(font);
		add(label1);
		add(label2);

		
		Font font4 = new Font("Serif",Font.PLAIN,13);	// Creacion del cuarto Font (para la lista de fonts disponibles)
		txArea.setEditable(false);
		String txAreaText = "We are using 'font 4' (Serif,Font.PLAIN,13)" + "\n"
							+ "This is the list of available fonts in your system for JAVA:" + "\n";
		txArea.setFont(font4);					   
		txArea.append(txAreaText);	// Agrega el texto descriptivo de 'txArea'
		populateFontList();			// Llamado al metodo que obtiene la lista de fonts dispobiles en el sistema.
		add(txArea); 				// Adiciona el control 'txArea' al applet.
	}
	
	TextArea txArea = new TextArea(); // Declaracion del nuevo control 'TextArea' para desplegar la lista de fonts disponibles
	
	public void populateFontList()
	{
		Toolkit toolkit = Toolkit.getDefaultToolkit();
		String strFontList[] = toolkit.getFontList();
		for(int i=0; i<strFontList.length; i++)
		{
			txArea.append(strFontList[i] + "\n");
		}
	}
	
	public void destroy()
	{
	}
	
	private	final String labelParam = "label";
	private	final String backgroundParam = "background";
	private	final String foregroundParam = "foreground";

	/**
	 * Reads parameters from the applet's HTML host and sets applet
	 * properties.
	 */
	private void usePageParams()
	{
		final String defaultLabel = "Default label";
		final String defaultBackground = "C0C0C0";
		final String defaultForeground = "000000";
		String labelValue;
		String backgroundValue;
		String foregroundValue;

		/** 
		 * Read the <PARAM NAME="label" VALUE="some string">,
		 * <PARAM NAME="background" VALUE="rrggbb">,
		 * and <PARAM NAME="foreground" VALUE="rrggbb"> tags from
		 * the applet's HTML host.
		 */
		labelValue = getParameter(labelParam);
		backgroundValue = getParameter(backgroundParam);
		foregroundValue = getParameter(foregroundParam);

		if ((labelValue == null) || (backgroundValue == null) ||
			(foregroundValue == null))
		{
			/**
			 * There was something wrong with the HTML host tags.
			 * Generate default values.
			 */
			labelValue = defaultLabel;
			backgroundValue = defaultBackground;
			foregroundValue = defaultForeground;
		}

		/**
		 * Set the applet's string label, background color, and
		 * foreground colors.
		 */
		label1.setText(labelValue);
		label1.setBackground(stringToColor(backgroundValue));
		label1.setForeground(stringToColor(foregroundValue));
		this.setBackground(stringToColor(backgroundValue));
		this.setForeground(stringToColor(foregroundValue));
	}

	/**
	 * Converts a string formatted as "rrggbb" to an awt.Color object
	 */
	private Color stringToColor(String paramValue)
	{
		int red;
		int green;
		int blue;

		red = (Integer.decode("0x" + paramValue.substring(0,2))).intValue();
		green = (Integer.decode("0x" + paramValue.substring(2,4))).intValue();
		blue = (Integer.decode("0x" + paramValue.substring(4,6))).intValue();

		return new Color(red,green,blue);
	}

	/**
	 * External interface used by design tools to show properties of an applet.
	 */
	public String[][] getParameterInfo()
	{
		String[][] info =
		{
			{ labelParam, "String", "Label string to be displayed" },
			{ backgroundParam, "String", "Background color, format \"rrggbb\"" },
			{ foregroundParam, "String", "Foreground color, format \"rrggbb\"" },
		};
		return info;
	}

	Label label1 = new Label();

	/**
	 * Intializes values for the applet and its components
	 */
	void initForm()
	{
		this.setBackground(Color.lightGray);
		this.setForeground(Color.black);
		label1.setText("label1");
		this.setLayout(new BorderLayout());
		this.add("North",label1);
		
		
	}
	
	public void paint(Graphics g)
	{
		// Creacion del primer Font
		Font font1 = new Font("TimesRoman",Font.PLAIN,22);
		g.setFont(font1);					// Selecciona el primer font en la clase Graphics
		g.setColor(Color.green);			// Selecciona el color verde para el primer font
		g.drawString("This text line uses 'font1' (TimesRoman,Font.PLAIN,22) and 'color.green'", 5,265);// Dibuja el texto a la clase Graphics
		
		Font font2 = new Font("Courier",Font.PLAIN,16);	// Creacion del segundo Font
		g.setFont(font2);								// Selecciona el segundo font en la clase Graphics
		g.setColor(Color.magenta);						// Seleciona el color magenta para el segundo font
		g.drawString("This text line uses 'font2' (Courier,Font.PLAIN,16) and 'Color.magenta'", 5,285); // Dibuja el texto a la clase Graphics
		
		drawCrazyText(g);
		
		// Codigo para desplegar la marquesina empleando el font 'font5'
		FontMetrics fm = g.getFontMetrics();
		g.setFont(font5);
		g.setColor(Color.red);
		g.drawString(m_strMessage, x, y);
		x -= 5;
		if (x < -fm.stringWidth(m_strMessage))
			x = 740;
						
	}
	
	public void start()
	{
		if(m_fonts == null)
		{
			m_fonts = new Thread(this);
			m_fonts.start();
		}
	}
	
	public void stop()
	{
		if(m_fonts != null)
		{
			m_fonts.stop();
			m_fonts = null;
		}
	}
	
	public void run()
	{
		while(true)
		{
			try
			{
				repaint();
				Thread.sleep(75);
			}
			catch(InterruptedException e)
			{
				stop();
			}
		}
	}
	
	public void drawCrazyText(Graphics g)
	{
		Font font3 = new Font ("Helvetica", Font.PLAIN, 13);  //Declaracion del nuevo font 'font3'
		g.setFont(font3);	// Seleccion de 'font3' dentro de la clase Graphics
		g.setColor(Color.blue);
		
		char txt[] = new char[10]; // Buffer tipo caracter
		txt[0] = 'H';
		txt[1] = 'e';
		txt[2] = 'l';
		txt[3] = 'l';
		txt[4] = 'o';
		
		g.drawChars(txt,0,5,5,300); // Buffer a usar + 1er caracter + # de caracteres + x + y
		for(int i=0; i<5; i++)
		{
			int nRnd = (int) (Math.random()*10.0);
			g.drawChars(txt, i, 1, 5+i * 10, 315 + nRnd);
		}
		
		getFontInfo(g, font3);
		
					

		
	}
		String getFontInfo(Graphics g, Font font3)
	{
		String m_strInfo, m_strInfo2="'font 3' is (Helvetica, Font.PLAIN, 13) and 'Color.blue'";
		FontMetrics fm;
	
		fm = g.getFontMetrics(font3);
	
		m_strInfo = "These lines use 'font3' with Font Metrics: ascent " + fm.getAscent() + ".";
		m_strInfo += ", descent " + fm.getDescent() + ".";
		m_strInfo += ", leading " + fm.getLeading() + ".";
		m_strInfo += ", height " + fm.getHeight() + ".";
		m_strInfo += "The string width of 'Hello' is " + fm.stringWidth("Hello") + ".";
		
		g.drawString(m_strInfo, 5,335);
		g.drawString(m_strInfo2, 5,355);
		return(m_strInfo);
		
		
	}
	
	
}