import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
/**
 * Tests the operation of the Fraction Class
 *
 * @author Mr J
 * @version 20040212  
 */
public class TestFraction extends Applet implements ActionListener
{
	// input boxes
	Label topLabel = new Label("Numerators:");
	Label botLabel = new Label("Demoninators:");
	TextField n1 = new TextField("n1");
	TextField n2 = new TextField("n2");
	TextField d1 = new TextField("d1");
	TextField d2 = new TextField("d2");
	
	private Button addButton = new Button("Add");
	private Label greeting = new Label("Applet that adds two fractions");

	/** 
	 * Add objects to the Applet
	 */
	public void init()
	{
	    Panel inputPanel = new Panel();
	    inputPanel.setLayout(new GridLayout(2, 3));
	    inputPanel.add(topLabel);
	    inputPanel.add(n1);
	    inputPanel.add(n2);
	    inputPanel.add(botLabel);
	    inputPanel.add(d1);
	    inputPanel.add(d2);
	    add(inputPanel);
        add(addButton);
        add(greeting);
        // Causes button presses to be detected
        addButton.addActionListener(this);
	}
	/** 
	 * When an event occurs on an object with an ActionListener attached, this
	 * method is carried out.  
	 * 
	 * @param e carries details about the event that occurred
	 */
		public void actionPerformed(ActionEvent e)
	{
	    // Get the data from the boxes and make the fraction objects
	    Fraction a = new Fraction( Integer.parseInt(n1.getText()), 
	                               Integer.parseInt(d1.getText()) );
	    Fraction b = new Fraction( Integer.parseInt(n2.getText()), 
	                               Integer.parseInt(d2.getText()) ); 
	    // add them together
	    Fraction c = Fraction.add( a, b );
	    greeting.setText("" + c.toString());
	}
}