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

class PlotFrame extends Frame{
    PlotFrame(int H, int W){
        setTitle("График функции");
        setBounds(100,50,W,H);
        setBackground(Color.GRAY);
        setLayout(null);
        Font f = new Font("Arial",Font.BOLD,11);
        setFont(f);
        Bpanel BPn1=new Bpanel(6,25,W/4,H-30);
        add(BPn1);
        PPanel PPn1 = new PPanel(W/4+10,25,3*W/4-15,H-120,BPn1);
        add(PPn1);
        HPanel HPn1=new HPanel(W/4+10,H-90,3*W/4-15,85);
        add(HPn1);
        addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
        BPn1.B1.addActionListener(new Button1Pressed(BPn1,PPn1));
        BPn1.B2.addActionListener(new Button2Pressed());
        BPn1.Cb[3].addItemListener(new cbChanged(BPn1));
        setResizable(false);

    }
}

class Bpanel extends Panel{
    public Label[] L;
    public CheckboxGroup CbG;
    public Checkbox[] Cb;
    public Choice Ch;
    public TextField TF;
    public Button B1,B2;
    Bpanel(int x,int y, int W, int H){
        setLayout(null);
        setBounds(x,y,W,H);
        setBackground(Color.LIGHT_GRAY);
        L=new Label[3];
        L[0]=new Label("Выбор цвета: ",Label.CENTER);
        L[0].setFont(new Font("Arial",Font.BOLD,12));
        L[0].setBounds(5,5,getWidth()-10,30);
        add(L[0]);
        CbG=new CheckboxGroup();
        Cb = new Checkbox[4];
        Cb[0]=new Checkbox(" Красный",CbG,true);
        Cb[1]=new Checkbox(" Синий",CbG,false);
        Cb[2]=new Checkbox(" Черный",CbG,false);
        Cb[3]=new Checkbox(" Сетка",true);
        for (int i = 0; i < 4; i++) {
            Cb[i].setBounds(5,30+i*25,getWidth()-10,30);
            add(Cb[i]);
        }
        Ch=new Choice();
        Ch.add("Зеленый");
        Ch.add("Желтый");
        Ch.add("Серый");
        Ch.setBounds(20,140,getWidth()-25,30);
        add(Ch);
        L[1]=new Label("Интервал по X:",Label.CENTER);
        L[1].setBounds(5,220,getWidth()-10,30);
        L[1].setFont(new Font("Arial",Font.BOLD,12));
        add(L[1]);
        L[2]=new Label("От x=0 до x=:",Label.CENTER);
        L[2].setBounds(5,250,70,20);
        add(L[2]);
        TF = new TextField("10");
        TF.setBounds(75,250,45,20);
        add(TF);
        B1=new Button("Нарисовать");
        B2=new Button("Закрыть");
        B1.setBounds(5,getHeight()-75,getWidth()-10,30);
        B2.setBounds(5,getHeight()-35,getWidth()-10,30);
        add(B1);
        add(B2);
    }
}

class PPanel extends Panel{
    public Plotter G;
    class Plotter{
        private double Xmin=0,Xmax=0,Ymin=0,Ymax=1.0;
        private boolean status;
        private Color clr;
        private Color gclr;
        Plotter(Bpanel P){
            try{
                Xmax=Double.valueOf(P.TF.getText());
            }
            catch (NumberFormatException e){
                P.TF.setText("10");
                Xmax=10;
            }
            status=P.Cb[3].getState();
            switch (P.Ch.getSelectedIndex()){
                case 0:
                    gclr=Color.GREEN;
                    break;
                case 1:
                    gclr=Color.YELLOW;
                    break;
                default:
                    gclr=Color.GRAY;
            }
            String name = P.CbG.getSelectedCheckbox().getLabel();
            if(name.equalsIgnoreCase(" Красный")) clr=Color.RED;
            else if(name.equalsIgnoreCase(" Синий")) clr=Color.BLUE;
            else clr=Color.BLACK;
        }
        private double f(double x){
            return (1+Math.sin(x))/(1+Math.abs(x));
        }
        public Plotter remember(Bpanel P){
            return new Plotter(P);
        }
        public void plot(Graphics Fig){
            int H,W,h,w,s=20;
            H=getHeight();
            W=getWidth();
            h=H-2*s;
            w=W-2*s;
            Fig.clearRect(0,0,W,H);
            int k,nums=10;
            Fig.setColor(Color.BLACK);
            Fig.drawLine(s,s,s,h*s);
            Fig.drawLine(s,s+h,s+w,s+h);
            for(k=0;k<=nums;k++){
                Fig.drawLine(s+k*w/nums,s+h,s+k*w/nums,s+h+5);
                Fig.drawLine(s-5,s+k*h/nums,s,s+k*h/nums);
                Fig.drawString(Double.toString(Xmin+k*(Xmax-Xmin)/nums),s+k*w/nums-5,s+h+15);
                Fig.drawString(Double.toString(Xmin+k*(Xmax-Xmin)/nums),s-17,s+h-1-k*h/nums);
            }
            if(status){
                Fig.setColor(gclr);
                for(k=1;k<=nums;k++){
                    Fig.drawLine(s+k*w/nums,s,s+k*w/nums,h+s);
                    Fig.drawLine(s,s+(k-1)*h/nums,s+w,s+(k-1)*h/nums);
                }
            }
            Fig.setColor(clr);
            double dx=(Xmax-Xmin)/w,dy=(Ymax-Ymin)/h;
            double x1,x2,y1,y2;
            int h1,h2,w1,w2;
            x1=Xmin;
            y1=f(x1);
            w1=s;
            h1=h+s-(int)Math.round(y1/dy);
            int step=5;
            for(int i=step;i<=w;i+=step){
                x2=i*dx;
                y2=f(x2);
                w2=s+(int)Math.round(x2/dx);
                h2=h+s-(int)Math.round(y2/dy);
                Fig.drawLine(w1,h1,w2,h2);
                Fig.drawRect(w1-2,h1-2,4,4);
                x1=x2;
                y1=y2;
                w1=w2;
                h1=h2;
            }
        }
    }
    PPanel(int x,int y,int W,int H,Bpanel P){
        G=new Plotter(P);
        setBackground(Color.WHITE);
        setBounds(x,y,W,H);
    }
    public void paint(Graphics g){
        G.plot(g);
    }
}

class HPanel extends Panel{
    public Label L;
    public TextArea TA;
    HPanel(int x,int y,int W,int H){
        setBackground(Color.LIGHT_GRAY);
        setBounds(x,y,W,H);
        setLayout(null);
        L=new Label("Справка",Label.CENTER);
        L.setBounds(0,0,W,20);
        add(L);
        TA = new TextArea(" График функции ");
        TA.setFont(new Font("Serif",Font.PLAIN,15));
        TA.setBounds(5,20,W-10,60);
        TA.setEditable(false);
        add(TA);
    }
}

class Button1Pressed implements ActionListener{
    private Bpanel P1;
    private PPanel P2;
    Button1Pressed(Bpanel P1, PPanel P2){
        this.P1=P1;
        this.P2=P2;
    }
    public void actionPerformed(ActionEvent ae){
        P2.G=P2.G.remember(P1);
        P2.G.plot(P2.getGraphics());
    }
}

class Button2Pressed implements ActionListener{
    public void actionPerformed(ActionEvent ae){
        System.exit(0);
    }
}

class cbChanged implements ItemListener{
    private Choice ch;
    cbChanged(Bpanel P){
        this.ch=P.Ch;
    }
    public void itemStateChanged(ItemEvent ie){
        ch.setEnabled(ie.getStateChange()==ie.SELECTED);
    }
}

class MyFrame{
    public static void main(String[] args) {
       PlotFrame frame = new PlotFrame(400,500);
       frame.setVisible(true);

    }
}