/**
  * Copyright (c): Uwe Schmidt, FH Wedel
  *
  * You may study, modify and distribute this source code
  * FOR NON-COMMERCIAL PURPOSES ONLY.
  * This copyright message has to remain unchanged.
  *
  * Note that this document is provided 'as is',
  * WITHOUT WARRANTY of any kind either expressed or implied.
  */

/* ein schlechtes Beispiel fuer ein model-view-cotroller Programm
 * die Eingaben (controller), die Verarbeitung (model)
 * und die Ausgaben (view) sind beliebig vermischt.
 */

import java.applet.Applet;
import java.awt.Button;
import java.awt.Label;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

//--------------------

public
class ModelViewController0
  extends Applet
{
  Button control1, control2;

  int    model;

  Label  view;

  //--------------------

  public
  void init() {

    //--------------------
    // die MVC Bestandteile initialisieren

    control1 = new Button("+1");
    control1.setBackground(Color.orange);

    control2 = new Button("-1");
    control2.setBackground(Color.pink);

    model = 0;

    view = new Label();
    view.setAlignment(Label.CENTER);
    view.setBackground(Color.gray);
    view.setText("0");

    //--------------------
    // die grafischen Objekte anordnen
    setLayout(new GridLayout(3,1));

    add(control1);
    add(control2);
    add(view);

    //--------------------
    // die controller Ereignisse behandeln

    control1.addActionListener
      (new ActionListener()
       {
	 public
	 void actionPerformed(ActionEvent e) {
	   ++model;
	   view.setText("" + model);
	 }
       }
      );

    control2.addActionListener
      (new ActionListener()
       {
	 public
	 void actionPerformed(ActionEvent e) {
	   --model;
	   view.setText("" + model);
	 }
       }
      );
  }

}