package ts;

/*
*  Mapa Logístico para Série Temporal
*  Por Rogério Neves
*  LSI- USP
*/

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

public class Map extends Applet implements ActionListener {
    Scrollbar sb1;
    Scrollbar sb2;
    PicCanvas canvas;
    Panel p1;
    Panel p2;
    Label l1;
    Label l2;
    Label l3;
    public TextField s;
    public TextField e;
    public TextField t;

    public void init() {
        Button b = null;
	setLayout(new BorderLayout());
	add("Center", canvas = new PicCanvas());
        add("South", p1 = new Panel());
	p1.setLayout(new BorderLayout());
        p1.add("North",sb1 = new Scrollbar());
        sb1.setMaximum(1010);
        sb1.setOrientation(0);
        sb1.setValue(550);
        sb1.addAdjustmentListener(new java.awt.event.AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ev) {
                sb1_adjustmentValueChanged(ev);
            }
        });
        p1.add("Center",sb2 = new Scrollbar());
        sb2.setMaximum(4010);
        sb2.setOrientation(0);
        sb2.setValue(3550);
        sb2.addAdjustmentListener(new java.awt.event.AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ev) {
                sb2_adjustmentValueChanged(ev);
            }
        });
	p1.add("South", p2 = new Panel());
        p2.add(l1 = new Label("Xo"));
	p2.add(s = new TextField(".55", 6));
        s.addActionListener(this);
        p2.add(l2 = new Label(" mu"));
	p2.add(e = new TextField("3.55", 6));
        e.addActionListener(this);
        p2.add(l3 = new Label(" step"));
        p2.add(t = new TextField("5", 2));
        t.addActionListener(this);
	p2.add(b = new Button("Draw"));
	b.addActionListener(this);
	p2.add (b = new Button("Info"));
	b.addActionListener(this);
	p2.add (b = new Button("Quit"));
	b.addActionListener(this);
    }
    public void destroy() {
        remove(canvas);
    }
    public void start() {
	setEnabled(true);
    }
    public void stop() {
	setEnabled(false);
    }
    public void processEvent(AWTEvent e) {
        if (e.getID() == Event.WINDOW_DESTROY) {
            System.exit(0);
        }
    }
    public static void main(String[] args) {
	Map M = new Map();
	Frame f;
        f = new Frame("Mapa Logistico") {
            protected void processWindowEvent(WindowEvent ev) {
                super.processWindowEvent(ev);
                if (ev.getID() == WindowEvent.WINDOW_CLOSING) { System.exit(0); }
            }
            public synchronized void setTitle(String title) {
                super.setTitle(title);
                enableEvents(AWTEvent.WINDOW_EVENT_MASK);
            }
        };
	f.add("Center", M);
	f.setSize(600, 500);
	f.show();
	M.init();
	M.start();
        f.setVisible(true);
    }
    public String getAppletInfo() {
        return "Logistic Map for\nTime-series\nBy Rogério Neves.";
    }
    void sb1_adjustmentValueChanged(AdjustmentEvent ev) {
          s.setText(Double.toString(((double)(sb1.getValue())/1000)));
          e.setText(Double.toString(((double)(sb2.getValue())/1000)));
          canvas.redraw(sb1.getValue(),sb2.getValue(),Integer.parseInt(t.getText().trim()));
    }
    void sb2_adjustmentValueChanged(AdjustmentEvent ev) {
          s.setText(Double.toString(((double)(sb1.getValue())/1000)));
          e.setText(Double.toString(((double)(sb2.getValue())/1000)));
          canvas.redraw(sb1.getValue(),sb2.getValue(),Integer.parseInt(t.getText().trim()));
    }
    public void actionPerformed(ActionEvent ev) {
	String label = ev.getActionCommand();
        if (label.equals("Quit")) System.exit(0);
        if (label.equals("Info")) canvas.redraw();
        double ss = Double.valueOf(s.getText().trim().toString()).doubleValue();
        double ee = Double.valueOf(e.getText().trim().toString()).doubleValue();
        if (ev.getSource().equals(s)) sb1.setValue((int)(ss*1000));
        if (ev.getSource().equals(e)) sb2.setValue((int)(ee*1000));
       	canvas.redraw(ss,ee,Integer.parseInt(t.getText().trim()));
    }
}

class PicCanvas extends Canvas {
    public double xo=.55;
    public double mi=3.55;
    public int step=5;
    boolean info = false;
    public void paint(Graphics g) {
	Rectangle r = getBounds();
        this.setBackground(Color.white);
	g.setColor(Color.yellow);
	for (int i = 1; i <= r.height / 10; i++) g.drawLine(0, i * 10, r.width, i * 10);
        for (int i = 1; i <= r.width / 10; i++) g.drawLine(i * 10, 0, i * 10, r.height);
	g.setColor(Color.black);
        g.drawRect(1,1,r.width-3,r.height-3);
        if (info) {
            this.info=false;
            g.drawString("Mapa logístico para série temporal" , 20, 20);
       	    g.drawString("Por Rogério Neves" , 20, 45);
       	    g.drawString("Laboratório de Sistemas Integáveis" , 20, 70);
       	    g.drawString("Universidade de São Paulo" , 20, 95);
        } else {
	g.drawString("1" , 3, 15);
	g.drawString("1" , 3, r.height / 2 - 4);
	g.drawString("_" , 3, r.height / 2 - 3);
	g.drawString("2" , 3, r.height / 2 + 10);
	g.drawString("0" , 3, r.height - 3);
        double xn = xo;
        double x = xo;
        int h = r.height-2;
        int t=14;
        while ((t+step)<=r.width) {
            xn = mi * xn * (1 - xn);
       	    g.setColor(Color.blue);
            g.drawLine(t,((int)(h-(x*h))),t+step,((int)(h-(xn*h))));
       	    g.setColor(Color.black);
            g.drawRect(t-1,((int)(h-(x*h)-1)),2,2);
            t=t+step;
            x=xn;
        }}
    }
    public void redraw(int s, int e, int tt) {
	this.xo = ((double)s) / 1000;
	this.mi = ((double)e) / 1000;
        this.step = tt;
	repaint();
    }
    public void redraw(double s, double e, int tt) {
	this.xo = s;
	this.mi = e;
        this.step = tt;
	repaint();
    }
    public void redraw() {
        this.info = true;
        repaint();
    }
}