import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.ImageObserver;

public class Balon {
	
	int x, y, vx, vy, v;
	double d;
	Image img;
	ImageObserver io;
	
	
	public Balon(Image img, int x, int y,int v, 
			double d, ImageObserver io){
	
		this.x = x;
		this.y = y;
		this.v = v;
		this.d = d;
		this.img = img;
		this.io = io;
		vx = v - (int)Math.round(Math.cos(d));
		vy = v - (int)Math.round(Math.sin(d));
		
	}
	
	public void mover (int minX,int minY,int maxX,int maxY){
		x += vx;
		y += vy;
		
		if (x + img.getWidth(io) > maxX){
			x = maxX-img.getWidth(io) ;
			vx = -vx;
		}else if (x < 0){
			x = 0;
			vx = -vx;
		}

		if (y + img.getHeight(io)> maxY){
			y = maxY-img.getHeight(io);
			vy = -vy;
		}else if (y < 0){
			y = 0;
			vy = -vy;
		}
	}
	public void paint (Graphics g){
		g.drawImage(img, x, y, io);
	}
}

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.ImageObserver;


public class Futbol extends Applet implements Runnable, ActionListener{ 
	
	Balon 			v[];
	int 			cont;
	Image 			campo;
	Image 			aux;
	Image			panelIzquierdo;
	Thread 			t;
	List 			lstBalon;
	TextField 		txtAncho,
			  		txtAlto,
			  		txtVelocidad,
			  		txtX,
			  		txtY,
			  		txtDireccion;
	Button    		cmdAgregar,
			  		cmdEliminar;
	CheckboxGroup 	cbgTipo;
	Checkbox    	chkBalon1,
					chkBalon,
					chkBalon2,
					chkBalon3;

	
	public void init(){
		cont = 0;
		v = new Balon [1000];
		setLayout(new BorderLayout());
		setSize(840, 407);
		//Crear el panel Derecho
		Panel panelDerecho = new Panel();
		panelDerecho.setBackground(Color.gray);
		panelDerecho.setPreferredSize(new Dimension(200, 400));
		//Añadir la etiqueta "Balones" al panel derecho
		Label lblAux = new Label("Balones");
		lblAux.setPreferredSize(new Dimension(200, 20));
		lblAux.setAlignment(Label.CENTER);
		panelDerecho.add(lblAux);
		//Añadir la lista para las balones al panel derecho
		lstBalon = new List();
		lstBalon.setPreferredSize(new Dimension(170, 170));
		panelDerecho.add(lstBalon);
		//Añadir campos de datos
		txtX = agregarTextField(panelDerecho, "X");
		txtY = agregarTextField(panelDerecho, "Y");
		txtVelocidad = agregarTextField(panelDerecho, "Velocidad");
		txtDireccion = agregarTextField(panelDerecho, "Dirección");
		
	
	
		//Añadir tipo de balon
		cbgTipo = new CheckboxGroup();
		chkBalon= new Checkbox ("Normal", cbgTipo, true);
		chkBalon.setPreferredSize(new Dimension(70, 20));
		panelDerecho.add(chkBalon);	
		chkBalon1 = new Checkbox ("R.Madrid", cbgTipo, false);
		chkBalon1.setPreferredSize(new Dimension(70, 20));
		panelDerecho.add(chkBalon1);	
		chkBalon2 = new Checkbox ("AtlMadrid", cbgTipo, false);
		chkBalon2.setPreferredSize(new Dimension(70, 20));
		panelDerecho.add(chkBalon2);
		chkBalon3 = new Checkbox ("Barça", cbgTipo, false);
		chkBalon3.setPreferredSize(new Dimension(70, 20));
		panelDerecho.add(chkBalon3);
		//Añadir botones
		cmdAgregar = new Button("Agregar");
		cmdAgregar.addActionListener(this);
		cmdEliminar = new Button("Eliminar");
		cmdEliminar.addActionListener(this);
		cmdAgregar.setPreferredSize(new Dimension (90, 30));
		cmdEliminar.setPreferredSize(new Dimension (90, 30));
		panelDerecho.add(cmdAgregar); 
		panelDerecho.add(cmdEliminar);
		//Añadir el panel Derecho al Applet
		add(panelDerecho, BorderLayout.EAST);
		//Crear el panel izquierdo
		campo = getImage(getCodeBase(), "img/campo.png");
		aux = createImage(640, 407);
		
	}
	
	public TextField agregarTextField(Panel p, String e){
		Label lblAux= new Label(e);
		TextField txtAux = new TextField();
		lblAux.setPreferredSize(new Dimension (90, 20));
		txtAux.setPreferredSize(new Dimension (90, 20));
		p.add(lblAux);
		p.add(txtAux);
		return txtAux;
	}
	
	public Choice agregarChoice(Panel p, String e){
		Label lblAux= new Label(e);
		Choice cboAux = new Choice();
		lblAux.setPreferredSize(new Dimension (90, 20));
		cboAux.setPreferredSize(new Dimension (90, 20));
		p.add(lblAux);
		p.add(cboAux);
		return cboAux;
	}

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

	public void run(){
		while (true){
			repaint ();
			for (int i=0; i<cont; i++)
				v[i].mover(0, 0, 639, 406);
			try {
				Thread.sleep(40);
			} catch (Exception e) {
			
			}
		}
	}	
	
	public void actionPerformed(ActionEvent e){
		if (e.getSource() == cmdAgregar){
			Balon aux;
			if(cbgTipo.getSelectedCheckbox()== chkBalon) {
				lstBalon.add("Normal");	
				aux = new Balon(getImage (getCodeBase(), "img/balon0.png"),
					Integer.parseInt(txtX.getText()),
					Integer.parseInt(txtY.getText()),
					Integer.parseInt(txtVelocidad.getText()),
					Integer.parseInt(txtDireccion.getText()),this);
			}
			else if(cbgTipo.getSelectedCheckbox()== chkBalon1) {
				lstBalon.add("R.Madrid");
				aux = new Balon (getImage (getCodeBase(), "img/balon1.png"),
					Integer.parseInt(txtX.getText()),
					Integer.parseInt(txtY.getText()),
					Integer.parseInt(txtVelocidad.getText()),
					Integer.parseInt(txtDireccion.getText()),this);
			}
			else if(cbgTipo.getSelectedCheckbox()== chkBalon2) {
				lstBalon.add("AtlMadrid");
				aux = new Balon (getImage (getCodeBase(), "img/balon2.png"),
						Integer.parseInt(txtX.getText()),
						Integer.parseInt(txtY.getText()),
						Integer.parseInt(txtVelocidad.getText()),
						Integer.parseInt(txtDireccion.getText()),this);
			}
			else {
				lstBalon.add("Barça");
				aux=new Balon (getImage (getCodeBase(), "img/balon3.png"),
					Integer.parseInt(txtX.getText()),
					Integer.parseInt(txtY.getText()),
					Integer.parseInt(txtVelocidad.getText()),
					Integer.parseInt(txtDireccion.getText()),this);
			}
			//Añadir el balon
			agregarBalon(aux);
		}
			else if (e.getSource() == cmdEliminar){
				int i =lstBalon.getSelectedIndex();
				if (i>=0){
					eliminarBalon(i);
					lstBalon.remove(i);
			}
		}
	}
	
	public  boolean agregarBalon(Balon b){
		if (cont == 1000)
			return false;
		else{
			v[cont ++] = b;
			return true;
		}
	}

	public boolean eliminarBalon(int i){
		if (cont == 0 || i >= cont)
			return false;
		else{
			for (int j=i; j<cont; j++)
				v[j] = v[j+1];
			cont--;
			return true;
		}
	}

	public void update (Graphics g){
		paint (g);
	}
	
	public void paint(Graphics g){
		aux.getGraphics().drawImage(campo, 0, 0, this);
		for (int i=0; i<cont; i++)
			v[i].paint(aux.getGraphics());
		g.drawImage(aux, 0, 0, this);
	}
	
}