/*
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 * and open the template in the editor.
 */
package exam5;

import javax.sound.sampled.Line;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;

/**
 * Created by IntelliJ IDEA.
 * User: алексей
 * Date: 13.03.11
 * Time: 20:15
 * To change this template use File | Settings | File Templates.
 */
public class MayatnicFrame extends JFrame {

    Toolkit tk;
    Dimension d;

    public MayatnicFrame() {
        tk = Toolkit.getDefaultToolkit();
        d = tk.getScreenSize();
        setBounds(d.width / 4, d.height / 4, d.width / 2, d.height / 2);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        //System.out.println(getWidth());
        add(new Mac(getWidth(), getHeight()));
    }

    public static void main(String[] args) {
        MayatnicFrame ma = new MayatnicFrame();
        ma.setVisible(true);
    }
}

class Mac extends JPanel {

    Ellipse2D el;
    Rectangle2D r;
    //Point2D g;
    Line2D line;
    double angle = 0;
    int count = 0;
    boolean back = false;
    Timer t;

    public Mac(double w, double h) {
        el = new Ellipse2D.Double();
        el.setFrameFromCenter(w / 2, h / 2, w / 2 + 70, h / 2 + 70);

        line = new Line2D.Double(w / 2, 0, el.getCenterX(), el.getCenterY());
        t = new Timer(20, new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                if(count == 45){
                    JOptionPane.showMessageDialog(null, "Маятник остановился!");
                    System.exit(0);
                }
                if (angle > 45 - count) {
                    back = true;
                    System.out.println(count);
                    angle--;
                    count++;
                }
                if (angle < -45 + count) {
                    back = false;
                    System.out.println(count);
                    angle++;
                    count++;
                }
                if (back) {
                    angle--;
                } else {
                    angle++;
                }
                repaint();
            }
        });
        addMouseListener(new MouseAdapter() {

            public void mouseClicked(MouseEvent e) {
                if (r.contains(e.getPoint())) {
                    if (t.isRunning()) {
                        t.stop();
                    } else {
                        t.start();
                    }
                }
            }
        });
    }

    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D) g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2.rotate(Math.toRadians(angle), line.getX1(), line.getY1());
        g2.draw(line);
        g2.setPaint(Color.PINK);
        g2.fill(el);
        r = el.getBounds2D();
    }
}