import MaxFlowApplet.mf_gui.GraphFrame;
import java.applet.Applet;
import java.awt.*;

/* The applet draws two buttons for openning and closing the "editing" window. *
 * When the window is opened, the option for opening a window is disabled, and *
 * when the window is not opened, the closing option is disabled.              */

public class MFApplet extends Applet
{
    /* Initializes the applet */
    public void init()
    {
        resize(DEFAULTWIDTH, DEFAULTHEIGHT);
        setLayout( new FlowLayout());
        add(goButton);
        add(endButton);
        endButton.disable();
    }
 
    /* Responds to the user actions (button pushes) */
    public boolean action(Event e, Object o)
    {
        if (e.target.equals(goButton))
        {
            if (session == null)
            {
                session = new GraphFrame("MaxFlowApplet", this);
                session.init();
                session.show();
                session.repaint();
                goButton.disable();
                endButton.enable();
            }
            return true;
        }

        if (e.target.equals(endButton));
        {
            if (session != null)
            {
                session.hide();
                session.dispose();
                session = null;
                goButton.enable();
                endButton.disable();
            }
            return true;
        }
    }

    public void start()
    {
        repaint();
    };

    public void destroy()
    {
       if (session != null)
       {
          session.hide();
          session.dispose();
       }
    };

    private static final int DEFAULTWIDTH = 350;
    private static final int DEFAULTHEIGHT = 70;
    private Button goButton = new Button("Run MaxFlowApplet");
    private Button endButton = new Button("End MaxFlowApplet");
    private GraphFrame session;
}