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

public class GridTesti  {
  public static void main(String[] args) {
    new GridIkkuna();
  }
}

class GridIkkuna extends Frame {
    Button painike1, painike2, painike3, painike4;
    TextArea teksti1, teksti2;

    public GridIkkuna() {
      setSize(300,200);
      setTitle("FlowLayout-testi");
      setLayout(new GridLayout(3,0));
      painike1 = new Button("1. painike (2,0)");
      painike2 = new Button("2. painike (3,0)");
      painike3 = new Button("3. painike (1,0)");
      painike4 = new Button("4. painike (4,2)");
      teksti1 = new TextArea("Toka tekstikenttä");
      teksti2 = new TextArea("Eka tekstikenttä");
      add(painike1); add(painike2);
      add(teksti1); add(teksti2);
      add(painike3); add(painike4);

      painike1.addActionListener(new PainikeKuuntelija());
      painike2.addActionListener(new PainikeKuuntelija());
      painike3.addActionListener(new PainikeKuuntelija());
      painike4.addActionListener(new PainikeKuuntelija());


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


    class PainikeKuuntelija implements ActionListener {
      public void actionPerformed(ActionEvent ae) {
        Object lahdeOlio = ae.getSource();
        // ((Component)lahdeOlio).setVisible(false);
        if (lahdeOlio == painike1) 
           setLayout(new GridLayout(2,0));
        else if (lahdeOlio == painike2) 
           setLayout(new GridLayout(3,0));
         else if (lahdeOlio == painike3)
           setLayout(new GridLayout(1,0));
         else if (lahdeOlio == painike4) 
           setLayout(new GridLayout(4,2));
         validate();
       }
    }

}