import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

/**
 * This program displays the growth of an investment.
 */
public class InvestmentViewer {
	private static final double DEFAULT_RATE = 2;
	private static final double INITIAL_BALANCE = 1000;

	public static void main(String[] args) {
		JFrame frame = new JFrame();

		// The label and text field for entering the interest rate
		JLabel rateLabel = new JLabel("Interest Rate: ");

		final int FIELD_WIDTH = 10;
		final JTextField rateField = new JTextField(FIELD_WIDTH);
		rateField.setText("" + DEFAULT_RATE);

		// The button to trigger the calculation
		JButton button = new JButton("Add Interest");

		// The application adds interest to this bank account
		final BankAccount account = new SavingsAccount(DEFAULT_RATE, "Suzie", INITIAL_BALANCE);

		// The label for displaying the results
		final JLabel resultLabel = new JLabel("balance=" + account.getBalance());

		// The panel that holds the user interface components
		JPanel panel = new JPanel();
		panel.add(rateLabel);
		panel.add(rateField);
		panel.add(button);
		panel.add(resultLabel);
		frame.add(panel);

		class AddInterestListener implements ActionListener {
			public void actionPerformed(ActionEvent event) {
				double rate = Double.parseDouble(rateField.getText());
				double interest = account.getBalance() * rate / 100;
				account.deposit(interest);
				resultLabel.setText("balance=" + account.getBalance());
			}
		}

		ActionListener listener = new AddInterestListener();
		button.addActionListener(listener);

		frame.pack();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);
	}
}