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

/**
 * A panel containing the input controls for one account
 */
public class Controller extends JPanel implements ActionListener {
    /**
     * The Model (Account) we are controlling
     */
    private Model model; //*1 Knows about model, but not vice versa

    /**
     * Save these so actionPerformed() can access
     */
    private JTextField textField;
    private JButton depositButton, withdrawButton;

    public Controller (Model model) {
	// Stash
	this.model = model; //*1
	
	// Layout of our panel
	setBorder (new TitledBorder ("Controller"));
	setLayout (new GridLayout (0, 1, 20, 20));

	// Our widget for entering amount of deposit or withdrawal
	textField = new JTextField ("0", 6); //*2 Provide control widgets
	add (textField);

	// Our deposit button
	depositButton = new JButton ("Deposit"); //*2
	depositButton.addActionListener (this);
	add (depositButton); //*2
	
	// Withdraw button
	withdrawButton = new JButton ("Withdraw"); //*2
	withdrawButton.addActionListener (this);
	add (withdrawButton); //*2
    }

    /**
     * Common callback for both buttons,
     * we use ivar to disambiguate.
     */
    public void actionPerformed (ActionEvent e) { //*3 Button action = call model for data
	if (e.getSource()==depositButton) //*3
	    model.deposit (Integer.parseInt (textField.getText())); //*3
	else if (e.getSource()==withdrawButton) //*3
	    model.withdraw (Integer.parseInt (textField.getText())); //*3
    }
}