import java.awt.*;
import java.awt.event.*;
import javax.swing.*;


public class AnimationFace extends JFrame{

    public AnimationFace(){
        //画面の設定
        setSize(700,700);
        setTitle("Java Programing");
        setDefaultCloseOperation(EXIT_ON_CLOSE);

        //パネルを貼り付ける
        MyJPanel    myJPanel= new MyJPanel();
        Container c = getContentPane();    //コンテナの取得
        c.add(myJPanel);        //パネルを貼る

       setVisible(true);
    }

    public static void main(String[] args){
        new AnimationFace();
    }

    public class MyJPanel extends JPanel implements ActionListener{

        JButton doSmaller,doBigger;
        double mouse_width, mouse_height, eye_shift;

        public MyJPanel(){
            setBackground(Color.white);
            doSmaller = new JButton("Small mouse");
            doBigger = new JButton("Big  mouse");

            mouse_width = 0.3;
            mouse_height = 0.05;
            eye_shift = 0;


            add(doSmaller);
            add(doBigger);
            doSmaller.addActionListener(this);    
            doBigger.addActionListener(this);    
        }


       //ｘ座標の変換
       public double  x_change(double x, double width, double x_min, double x_max){
          double new_x;
          new_x = (x - x_min)/(x_max - x_min) * width;
          return new_x;
       } 
       //y座標の変換
       public double  y_change(double y, double height, double y_min, double y_max){
          double new_y;
          new_y = (y - y_min)/(y_max - y_min) * height;
          new_y = height - new_y;
          return new_y;
       } 


        public void paintComponent(Graphics g){

            super.paintComponent(g); //画面クリアする。

            Graphics2D g2 = (Graphics2D) g;
            g2.setStroke(new BasicStroke(10));//描画の線分の幅を調整する。

            Dimension d;
             d = getSize();


            //螺旋を描く
            double theta, theta_step=2*Math.PI/50;
            double r, r_step = 0.01;
            double x_start,y_start, x_end, y_end;
            int px_start, py_start, px_end, py_end;
            int mouse_width_screen, mouse_height_screen;
            

            //口の幅と高さの変換
            mouse_width_screen = (int)(mouse_width * d.width/2.0);
            mouse_height_screen = (int)(mouse_height * d.height/2.0);

            //Draw left eye
            px_start = (int) x_change(-0.5, d.width, -1,1);
            py_start = (int) y_change(0.5 + eye_shift, d.height, -1,1);
            px_end = (int) x_change(-0.5 + 0.3, d.width, -1,1);
            py_end = (int) y_change(0.5 + eye_shift, d.height, -1,1);
            g.drawLine( px_start, py_start, px_end, py_end);

            //Draw right eye
            px_start = (int) x_change(0.5, d.width, -1,1);
            py_start = (int) y_change(0.5  + eye_shift, d.height, -1,1);
            px_end = (int) x_change(0.5 - 0.3, d.width, -1,1);
            py_end = (int) y_change(0.5  + eye_shift, d.height, -1,1);
            g.drawLine( px_start, py_start, px_end, py_end);


            //口を描く
            g.drawRect(  (int) x_change( - mouse_width/2 , d.width, -1,1) , 
                         (int) y_change( mouse_height/2 - 0.1, d.height, -1,1),
                         mouse_width_screen, mouse_height_screen);


    }

        public void actionPerformed(ActionEvent e) {
            if(e.getSource()==doSmaller)
            {

             //口を横にする
              mouse_width = 0.3;
              mouse_height = 0.05;
              eye_shift = 0.0;

              repaint();
            }

            if(e.getSource()==doBigger)
            {

             //口を縦にする
              mouse_width = 0.2;
              mouse_height = 0.3;
              eye_shift = 0.2;
              repaint();
            }

        }

    }
}