/*
   PerusKomponenttiTesti.java
   Tekijä: Juha Peltomäki.
*/
import java.awt.*;
import java.awt.event.*;

public class PerusKomponenttiTesti  {
  public static void main(String[] args) {
    new Kehys();
  }
}

// Luodaan Frame-olio
class Kehys extends Frame {
    public Kehys() {
      setSize(300,200);
      setTitle("Component-testi");
      add(new Paneeli());

      addWindowListener(new WindowAdapter() {
        public void windowClosing(WindowEvent we) {
          dispose();
          System.exit(0);
        }
      }); 
      setVisible(true);  // show();
   }

  class Paneeli extends Panel {
      Component c1 = new Button("Button1"); 
      Component c2 = new Label("Label2");
      Component c3 = new Button("Button3");

    public Paneeli() {
      setLayout(new GridLayout(3,0));
      add(c1); add(c2); add(c3);
      ((Button)c1).addActionListener(new Kuuntelija());
      ((Button)c3).addActionListener(new Kuuntelija());
    }

    class Kuuntelija implements ActionListener {
      public void actionPerformed(ActionEvent ae) {
         Object lahdeOlio = ae.getSource();
         String txt = ((Button)lahdeOlio).getLabel();
         ((Label)c2).setText(txt);
         validate();
       }
    }


  }


}