import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JRadioButtonMenuItem;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JRadioButton;
import javax.swing.JTextArea;
import javax.swing.ButtonGroup;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

public final class MenuExample extends JPanel {
	private static final int WINDOW_WIDTH = 640;
	private static final int WINDOW_HEIGHT = 480;
	private static final int PENDING_NOTHING = 0;
	private static final int PENDING_SQUARE = 1;
	private static final int PENDING_CIRCLE = 2;
	private static final int SHAPE_WIDTH = 50;
	private static final int SHAPE_HEIGHT = 50;

	private Color backColor = Color.white;
	private Color foreColor = Color.black;

	private int pendingShape = PENDING_NOTHING;
	private int pendingX, pendingY;

	public static void main(final String[] args) {
		JFrame frame = new JFrame("Menu Example");
		MenuExample panel = new MenuExample();
		frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		frame.setSize(WINDOW_WIDTH, WINDOW_HEIGHT);
		frame.setLocationRelativeTo(null);

		frame.setContentPane(panel);

		frame.setJMenuBar(panel.getMenuBar());

		panel.initWidgets();

		frame.setVisible(true);
	}

	public JMenuBar getMenuBar() {
		JMenuBar menuBar = new JMenuBar();

		JMenu fileMenu = new JMenu("File");
		fileMenu.setMnemonic(KeyEvent.VK_F);

		JMenuItem clearItem = new JMenuItem("Clear", KeyEvent.VK_L);
		fileMenu.add(clearItem);
		clearItem.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				backColor = Color.black;
				repaint();
			}
		});

		fileMenu.addSeparator();

		JMenuItem exitItem = new JMenuItem("Exit", KeyEvent.VK_X);
		exitItem.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				System.exit(0);
			}
		});

		fileMenu.add(exitItem);

		menuBar.add(fileMenu);

		JMenu colorMenu = new JMenu("Color");
		colorMenu.setMnemonic(KeyEvent.VK_C);

		JMenuItem greenItem = new JMenuItem("Green", KeyEvent.VK_G);
		greenItem.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				backColor = Color.green;
				repaint();
			}
		});
		colorMenu.add(greenItem);

		JMenuItem blueItem = new JMenuItem("Blue", KeyEvent.VK_B);
		blueItem.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				backColor = Color.blue;
				repaint();
			}
		});
		colorMenu.add(blueItem);

		JMenuItem redItem = new JMenuItem("Red", KeyEvent.VK_R);
		redItem.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				backColor = Color.red;
				repaint();
			}
		});
		colorMenu.add(redItem);

		menuBar.add(colorMenu);

		return menuBar;
	}

	public void initWidgets() {
		JLabel userNameLabel = new JLabel("Enter your username");
		this.add(userNameLabel);

		JTextField userNameText = new JTextField();
		userNameText.setColumns(8);
		this.add(userNameText);

		JLabel passwordLabel = new JLabel("Enter password");
		this.add(passwordLabel);

		final JPasswordField passwordText = new JPasswordField();
		passwordText.setColumns(8);

		final JButton submitButton = new JButton("Submit");
		submitButton.setEnabled(false);

		passwordText.addKeyListener(new KeyAdapter() {
			public void keyTyped(KeyEvent e) {
				int length = passwordText.getPassword().length;

				if (length < 8) {
					passwordText.setBackground(Color.red);
					submitButton.setEnabled(false);
				} else {
					passwordText.setBackground(Color.white);
					submitButton.setEnabled(true);
				}
			}
		});
		this.add(passwordText);

		submitButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				JOptionPane.showMessageDialog(submitButton,
						"You are now logged in.");
			}
		});
		this.add(submitButton);

		final JPopupMenu pop = new JPopupMenu();

		JMenu drawMenu = new JMenu("Draw");

		JMenuItem drawCircle = new JMenuItem("Circle");
		drawCircle.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				pendingShape = PENDING_CIRCLE;
				repaint();
			}
		});
		drawMenu.add(drawCircle);

		JMenuItem drawSquare = new JMenuItem("Square");
		drawSquare.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				pendingShape = PENDING_SQUARE;
				repaint();
			}
		});
		drawMenu.add(drawSquare);

		pop.add(drawMenu);

		JMenu colorMenu = new JMenu("Pen Color");
		
		ButtonGroup colors = new ButtonGroup();
		final JRadioButtonMenuItem blackCheck = new JRadioButtonMenuItem("Black",
				true);

		colorMenu.add(blackCheck);
		colors.add(blackCheck);

		final JRadioButtonMenuItem blueCheck = new JRadioButtonMenuItem("Blue", false);

		blackCheck.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				foreColor = Color.black;

			}
		});

		blueCheck.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				foreColor = Color.blue;
			}
		});


		colorMenu.add(blueCheck);
		colors.add(blueCheck);
		pop.add(colorMenu);

		this.addMouseListener(new MouseAdapter() {
			public void mouseClicked(MouseEvent e) {
				if (e.getButton() == MouseEvent.BUTTON3) {
					pendingX = e.getX();
					pendingY = e.getY();
					pop.show(MenuExample.this, pendingX, pendingY);
				}
			}
		});

		ButtonGroup radios = new ButtonGroup();
		JRadioButton option1 = new JRadioButton("Option 1");
		radios.add(option1);
		this.add(option1);

		JRadioButton option2 = new JRadioButton("Option 2");
		radios.add(option2);
		this.add(option2);

		JRadioButton option3 = new JRadioButton("Option 3");
		radios.add(option3);
		this.add(option3);

		final JTextArea area = new JTextArea(5, 5);
		this.add(area);

		option1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				area.setText("Radio 1 selected!");
			}
		});
	}

	public void paint(Graphics g) {
		super.paint(g);
		g.setColor(backColor);
		//g.fillRect(0, 0, getWidth(), getHeight());

		g.setColor(foreColor);
		if (pendingShape == PENDING_CIRCLE) {
			g.drawOval(pendingX, pendingY, SHAPE_WIDTH, SHAPE_HEIGHT);
		} else if (pendingShape == PENDING_SQUARE) {
			g.drawRect(pendingX, pendingY, SHAPE_WIDTH, SHAPE_HEIGHT);
		}
		pendingShape = PENDING_NOTHING;
	}

}