package thread;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class enargeButton extends JFrame {

    private JButton jbtenlarge = new JButton("large");
    private JButton jbtshrink = new JButton("small");
    private BallCanvas canvas = new BallCanvas();

    public enargeButton(){
        JPanel panel = new JPanel();
        panel.add(jbtenlarge);
        panel.add(jbtshrink);
        this.add(canvas,BorderLayout.CENTER);
        this.add(panel,BorderLayout.SOUTH);
    jbtenlarge.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e){
            canvas.enlarge();
        }});
    jbtshrink.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e){
            canvas.shrink();
        }});
    }
}
    public class circle{
    public static void main(String[] args) {
        JFrame frame = new enargeButton();
        frame.setTitle("Control Ball");
        frame.setLocationRelativeTo(null);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(200,200);
        frame.setVisible(true);

    }
    }
    public static class BallCanvas extends JPanel{
        private int radius =5;
        public void enlarge(){
            radius +=1;
            repaint();
        }
       public void shrink(){
           radius -=1;
           repaint();
       }

       protected void paintCompotent(Graphics g){
           super.paintComponent(g);
           g.drawOval(getWidth()/2-radius, getHeight()/2-radius,2*radius,2*radius);
       }



    }









}