/*
 * fourier.java
 *
 * Created on 29. Mai 2004, 17:16
 */

/**
 *
 * @author  nus
 */

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

public class fourier extends Applet implements ActionListener {

    Scrollbar a1;
    Scrollbar a2;
    Scrollbar a3;
    Scrollbar a4;
    Scrollbar a5;
    Scrollbar a6;
    Scrollbar a7;
    Scrollbar a8;
    Scrollbar a9;
    Scrollbar a10;
    Scrollbar a11;
    Scrollbar a12;
    
    Scrollbar p1;
    Scrollbar p2;
    Scrollbar p3;
    Scrollbar p4;
    Scrollbar p5;
    Scrollbar p6;
    Scrollbar p7;
    Scrollbar p8;
    Scrollbar p9;
    Scrollbar p10;
    Scrollbar p11;
    Scrollbar p12;
    
    Button form1;
    Button form2;
    Button form3;
    Button loeschen;
    
    Label va1;
    Label va2;
    Label va3;
    Label va4;
    Label va5;
    Label va6;
    Label va7;
    Label va8;
    Label va9;
    Label va10;
    Label va11;
    Label va12;
    
    Label vp1;
    Label vp2;
    Label vp3;
    Label vp4;
    Label vp5;
    Label vp6;
    Label vp7;
    Label vp8;
    Label vp9;
    Label vp10;
    Label vp11;
    Label vp12;
    
    String formel;
    
    public void init() {
        setLayout(new BorderLayout());
        
        Panel paneln = new Panel();
        form1 = new Button("Rechteck");
        form2 = new Button("Dreieck");
        form3 = new Button("Sägezahn");
        loeschen = new Button("Alles löschen");
        paneln.add(form1);
        form1.addActionListener(this);
        paneln.add(form2);
        form2.addActionListener(this);
        paneln.add(form3);
        form3.addActionListener(this);
        paneln.add(loeschen);
        loeschen.addActionListener(this);
      
        Panel panele = new Panel();        
        panele.setLayout(new GridLayout(6,12,10, 10));
        
        Label la1 = new Label("1");
        Label la2 = new Label("2");
        Label la3 = new Label("3");
        Label la4 = new Label("4");
        Label la5 = new Label("5");
        Label la6 = new Label("6");
        Label la7 = new Label("7");
        Label la8 = new Label("8");
        Label la9 = new Label("9");
        Label la10 = new Label("10");
        Label la11 = new Label("11");
        Label la12 = new Label("12");
        
        Label lp1 = new Label("1");
        Label lp2 = new Label("2");
        Label lp3 = new Label("3");
        Label lp4 = new Label("4");
        Label lp5 = new Label("5");
        Label lp6 = new Label("6");
        Label lp7 = new Label("7");
        Label lp8 = new Label("8");
        Label lp9 = new Label("9");
        Label lp10 = new Label("10");
        Label lp11 = new Label("11");
        Label lp12 = new Label("12");
        
        a1 = new Scrollbar(Scrollbar.VERTICAL, 200, 1,0,200);
        a2 = new Scrollbar(Scrollbar.VERTICAL, 200,1, 0,200);
        a3 = new Scrollbar(Scrollbar.VERTICAL, 200, 1,0,200);
        a4 = new Scrollbar(Scrollbar.VERTICAL, 200,1, 0,200);
        a5 = new Scrollbar(Scrollbar.VERTICAL, 200, 1,0,200);
        a6 = new Scrollbar(Scrollbar.VERTICAL, 200,1, 0,200);
        a7 = new Scrollbar(Scrollbar.VERTICAL, 200, 1,0,200);
        a8 = new Scrollbar(Scrollbar.VERTICAL, 200,1, 0,200);
        a9 = new Scrollbar(Scrollbar.VERTICAL, 200, 1,0,200);
        a10 = new Scrollbar(Scrollbar.VERTICAL, 200,1, 0,200);
        a11 = new Scrollbar(Scrollbar.VERTICAL, 200, 1,0,200);
        a12 = new Scrollbar(Scrollbar.VERTICAL, 200,1, 0,200);

        p1 = new Scrollbar(Scrollbar.VERTICAL, 360, 1,0,360);
        p2 = new Scrollbar(Scrollbar.VERTICAL, 360,1, 0,360);
        p3 = new Scrollbar(Scrollbar.VERTICAL, 360, 1,0,360);
        p4 = new Scrollbar(Scrollbar.VERTICAL, 360,1, 0,360);
        p5 = new Scrollbar(Scrollbar.VERTICAL, 360, 1,0,360);
        p6 = new Scrollbar(Scrollbar.VERTICAL, 360,1, 0,360);
        p7 = new Scrollbar(Scrollbar.VERTICAL, 360, 1,0,360);
        p8 = new Scrollbar(Scrollbar.VERTICAL, 360,1, 0,360);
        p9 = new Scrollbar(Scrollbar.VERTICAL, 360, 1,0,360);
        p10 = new Scrollbar(Scrollbar.VERTICAL, 360,1, 0,360);
        p11 = new Scrollbar(Scrollbar.VERTICAL, 360, 1,0,360);
        p12 = new Scrollbar(Scrollbar.VERTICAL, 360,1, 0,360);
        
        va1 = new Label("0");
        va2 = new Label("0");
        va3 = new Label("0");
        va4 = new Label("0");
        va5 = new Label("0");
        va6 = new Label("0");
        va7 = new Label("0");
        va8 = new Label("0");
        va9 = new Label("0");
        va10 = new Label("0");
        va11 = new Label("0");
        va12 = new Label("0");
        
        vp1 = new Label("0");
        vp2 = new Label("0");
        vp3 = new Label("0");
        vp4 = new Label("0");
        vp5 = new Label("0");
        vp6 = new Label("0");
        vp7 = new Label("0");
        vp8 = new Label("0");
        vp9 = new Label("0");
        vp10 = new Label("0");
        vp11 = new Label("0");
        vp12 = new Label("0");
        
        panele.add(la1);
        panele.add(la2);
        panele.add(la3);
        panele.add(la4);
        panele.add(la5);
        panele.add(la6);
        panele.add(la7);
        panele.add(la8);
        panele.add(la9);
        panele.add(la10);
        panele.add(la11);
        panele.add(la12);
        
        panele.add(a1);
        panele.add(a2);
        panele.add(a3);
        panele.add(a4);
        panele.add(a5);
        panele.add(a6);
        panele.add(a7);
        panele.add(a8);
        panele.add(a9);
        panele.add(a10);
        panele.add(a11);
        panele.add(a12);
        
        panele.add(va1);
        panele.add(va2);
        panele.add(va3);
        panele.add(va4);
        panele.add(va5);
        panele.add(va6);
        panele.add(va7);
        panele.add(va8);
        panele.add(va9);
        panele.add(va10);
        panele.add(va11);
        panele.add(va12);

        panele.add(lp1);
        panele.add(lp2);
        panele.add(lp3);
        panele.add(lp4);
        panele.add(lp5);
        panele.add(lp6);
        panele.add(lp7);
        panele.add(lp8);
        panele.add(lp9);
        panele.add(lp10);
        panele.add(lp11);
        panele.add(lp12);
        
        panele.add(p1);
        panele.add(p2);
        panele.add(p3);
        panele.add(p4);
        panele.add(p5);
        panele.add(p6);
        panele.add(p7);
        panele.add(p8);
        panele.add(p9);
        panele.add(p10);
        panele.add(p11);
        panele.add(p12);
        
        panele.add(vp1);
        panele.add(vp2);
        panele.add(vp3);
        panele.add(vp4);
        panele.add(vp5);
        panele.add(vp6);
        panele.add(vp7);
        panele.add(vp8);
        panele.add(vp9);
        panele.add(vp10);
        panele.add(vp11);
        panele.add(vp12);        
        
        a1.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                va1.setText(" " + (200 - ade.getValue()));
                repaint();
            }
        });
        a2.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                va2.setText(" " + (200 - ade.getValue()));
                repaint();
            }
        });
        a3.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                va3.setText(" " + (200 - ade.getValue()));
                repaint();
            }
        });
        a4.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                va4.setText(" " + (200 - ade.getValue()));
                repaint();
            }
        });
        a5.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                va5.setText(" " + (200 - ade.getValue()));
                repaint();
            }
        });
        a6.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                va6.setText(" " + (200 - ade.getValue()));
                repaint();
            }
        });
        a7.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                va7.setText(" " + (200 - ade.getValue()));
                repaint();
            }
        });
        a8.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                va8.setText(" " + (200 - ade.getValue()));
                repaint();
            }
        });
        a9.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                va9.setText(" " + (200 - ade.getValue()));
                repaint();
            }
        });
        a10.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                va10.setText(" " + (200 - ade.getValue()));
                repaint();
            }
        });
        a11.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                va11.setText(" " + (200 - ade.getValue()));
                repaint();
            }
        });
        a12.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                va12.setText(" " + (200 - ade.getValue()));
                repaint();
            }
        });
        
        p1.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                vp1.setText(" " + (360 - ade.getValue()));
                repaint();
            }
        });
        p2.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                vp2.setText(" " + (360 - ade.getValue()));
                repaint();
            }
        });
        p3.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                vp3.setText(" " + (360 - ade.getValue()));
                repaint();
            }
        });
        p4.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                vp4.setText(" " + (360 - ade.getValue()));
                repaint();
            }
        });
        p5.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                vp5.setText(" " + (360 - ade.getValue()));
                repaint();
            }
        });
        p6.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                vp6.setText(" " + (360 - ade.getValue()));
                repaint();
            }
        });
        p7.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                vp7.setText(" " + (360 - ade.getValue()));
                repaint();
            }
        });
        p8.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                vp8.setText(" " + (360 - ade.getValue()));
                repaint();
            }
        });
        p9.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                vp9.setText(" " + (360 - ade.getValue()));
                repaint();
            }
        });
        p10.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                vp10.setText(" " + (360 - ade.getValue()));
                repaint();
            }
        });
        p11.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                vp11.setText(" " + (360 - ade.getValue()));
                repaint();
            }
        });
        p12.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent ade) {
                vp12.setText(" " + (360 - ade.getValue()));
                repaint();
            }
        });
        
        add ("North", paneln);
        add ("East", panele);
    }
    
    public void actionPerformed(ActionEvent e) {
        alles_auf_null();
        if (e.getSource() == form1) {
            a1.setValue(200-180);
            a3.setValue(200-60);
            a5.setValue(200-36);
            a7.setValue(200-26);
            a9.setValue(200-20);
            a11.setValue(200-16);
            va1.setText("180");
            va3.setText("60");
            va5.setText("36");
            va7.setText("26");
            va9.setText("20");
            va11.setText("16");
            formel = "Rechteck-Schwingung: f(t) = sin(f.t) + 1/3 sin(3.f.t) + 1/5 sin(5.f.t) + ...";
            repaint();
        }
            
        if (e.getSource() == form3) {
            a1.setValue(200-180);
            a2.setValue(200-100);
            a3.setValue(200-60);
            a4.setValue(200-45);
            a5.setValue(200-36);
            a6.setValue(200-30);
            a7.setValue(200-26);
            a8.setValue(200-23);
            a9.setValue(200-20);
            a10.setValue(200-18);
            a11.setValue(200-16);
            a12.setValue(200-15);
            va1.setText("180");
            va2.setText("100");
            va3.setText("60");
            va4.setText("45");
            va5.setText("36");
            va6.setText("30");
            va7.setText("26");
            va8.setText("23");
            va9.setText("20");
            va10.setText("18");
            va11.setText("16");
            va12.setText("15");
            formel = "Sägezahn-Schwingung: f(t) = sin (f.t) + 1/2 sin(2.f.t) + 1/3 sin(3.f.t) + ...";
            repaint();
        }
        
        if (e.getSource() == form2) {
            a1.setValue(200-180);
            a3.setValue(200-20);
            a5.setValue(200-7);
            a7.setValue(200-4);
            a9.setValue(200-2);
            a11.setValue(200-1);
            va1.setText("180");
            va3.setText("20");
            va5.setText("7");
            va7.setText("4");
            va9.setText("2");
            va11.setText("1");
            p3.setValue(360-180);
            p7.setValue(360-180);
            p11.setValue(360-180);
            vp3.setText("180");
            vp7.setText("180");
            vp11.setText("180");
            formel = "Dreieck-Schwingung: f(t) = sin(f.t) - 1/3² sin(3.f.t) + 1/5² sin(5.f.t) -+ ...";
            repaint();
        }
        
        if (e.getSource() == loeschen) {
            alles_auf_null();
            formel = "";
            repaint();
        }
    }
    
    public void alles_auf_null() {
        a1.setValue(200);
        a2.setValue(200);
        a3.setValue(200);
        a4.setValue(200);
        a5.setValue(200);
        a6.setValue(200);
        a7.setValue(200);
        a8.setValue(200);
        a9.setValue(200);
        a10.setValue(200);
        a11.setValue(200);
        a12.setValue(200);        
        p1.setValue(360);
        p2.setValue(360);
        p3.setValue(360);
        p4.setValue(360);
        p5.setValue(360);
        p6.setValue(360);
        p7.setValue(360);
        p8.setValue(360);
        p9.setValue(360);
        p10.setValue(360);
        p11.setValue(360);
        p12.setValue(360);
        va1.setText("0");
        va2.setText("0");
        va3.setText("0");
        va4.setText("0");
        va5.setText("0");
        va6.setText("0");
        va7.setText("0");
        va8.setText("0");
        va9.setText("0");
        va10.setText("0");
        va11.setText("0");
        va12.setText("0");
        vp1.setText("0");
        vp2.setText("0");
        vp3.setText("0");
        vp4.setText("0");
        vp5.setText("0");
        vp6.setText("0");
        vp7.setText("0");
        vp8.setText("0");
        vp9.setText("0");
        vp10.setText("0");
        vp11.setText("0");
        vp12.setText("0");
        
    }
    
    public double f(int x) {
        double rad = 314.159 / 180;
        double pw1 = Double.valueOf(vp1.getText()).doubleValue()*rad;
        double pw2 = Double.valueOf(vp2.getText()).doubleValue()*rad;
        double pw3 = Double.valueOf(vp3.getText()).doubleValue()*rad;
        double pw4 = Double.valueOf(vp4.getText()).doubleValue()*rad;
        double pw5 = Double.valueOf(vp5.getText()).doubleValue()*rad;
        double pw6 = Double.valueOf(vp6.getText()).doubleValue()*rad;
        double pw7 = Double.valueOf(vp7.getText()).doubleValue()*rad;
        double pw8 = Double.valueOf(vp8.getText()).doubleValue()*rad;
        double pw9 = Double.valueOf(vp9.getText()).doubleValue()*rad;
        double pw10 = Double.valueOf(vp10.getText()).doubleValue()*rad;
        double pw11 = Double.valueOf(vp11.getText()).doubleValue()*rad;
        double pw12 = Double.valueOf(vp12.getText()).doubleValue()*rad;
        
        return (double) (Double.valueOf(va1.getText()).doubleValue()*Math.sin((double)(x + pw1) / 100)) 
            + Double.valueOf(va2.getText()).doubleValue()*Math.sin((double) (2 * x + pw2)/ 100 )
            + Double.valueOf(va3.getText()).doubleValue()*Math.sin((double) (3 * x + pw3)/ 100)
            + Double.valueOf(va4.getText()).doubleValue()*Math.sin((double) (4 * x + pw4)/ 100)
            + Double.valueOf(va5.getText()).doubleValue()*Math.sin((double) (5 * x + pw5)/ 100)
            + Double.valueOf(va6.getText()).doubleValue()*Math.sin((double) (6 * x + pw6)/ 100)
            + Double.valueOf(va7.getText()).doubleValue()*Math.sin((double) (7 * x + pw7)/ 100)
            + Double.valueOf(va8.getText()).doubleValue()*Math.sin((double) (8 * x + pw8)/ 100)
            + Double.valueOf(va9.getText()).doubleValue()*Math.sin((double) (9 * x + pw9)/ 100)
            + Double.valueOf(va10.getText()).doubleValue()*Math.sin((double) (10 * x + pw10)/ 100)
            + Double.valueOf(va11.getText()).doubleValue()*Math.sin((double) (11 * x + pw11)/ 100)
            + Double.valueOf(va12.getText()).doubleValue()*Math.sin((double) (12 * x + pw12)/ 100)
        ;
    }
    
    public void paint (Graphics bs) {
        Color db = new Color(0,0,128);
        bs.setColor(db);
        bs.fillRect(0,0, 800, 600);
        bs.setColor(Color.white);
        bs.drawLine(0, 300,800,300);
        bs.setColor(Color.yellow);
        for (int i = 0; i<800; i++)  
            bs.drawLine(i, 300 - (int) f(i), i+1, 300 - (int) f(i+1));
        bs.setColor(Color.black);
        bs.drawString(formel,10,640);
    }
}