/* Listing3106.java */

import java.awt.*;
import java.awt.event.*;

public class Listing3106
extends Frame
{
  public static void main(String[] args)
  {
    Listing3106 wnd = new Listing3106();
    wnd.setVisible(true);
  }

  public Listing3106()
  {
    super("Test GridBagLayout");
    setBackground(Color.lightGray);
    addWindowListener(new WindowClosingAdapter(true));
    //Layout setzen und Komponenten hinzufügen
    GridBagLayout gbl = new GridBagLayout();
    GridBagConstraints gbc;
    setLayout(gbl);

    //List hinzufügen
    List list = new List();
    for (int i = 0; i < 20; ++i) {
      list.add("This is item " + i);
    }
    gbc = makegbc(0, 0, 1, 3);
    gbc.weightx = 100;
    gbc.weighty = 100;
    gbc.fill = GridBagConstraints.BOTH;
    gbl.setConstraints(list, gbc);
    add(list);
    //Zwei Labels und zwei Textfelder
    for (int i = 0; i < 2; ++i) {
      //Label
      gbc = makegbc(1, i, 1, 1);
      gbc.fill = GridBagConstraints.NONE;
      Label label = new Label("Label " + (i + 1));
      gbl.setConstraints(label, gbc);
      add(label);
      //Textfeld
      gbc = makegbc(2, i, 1, 1);
      gbc.weightx = 100;
      gbc.fill = GridBagConstraints.HORIZONTAL;
      TextField field = new TextField("TextField " + (i +1));
      gbl.setConstraints(field, gbc);
      add(field);
    }
    //Ende-Button
    Button button = new Button("Ende");
    gbc = makegbc(2, 2, 0, 0);
    gbc.fill = GridBagConstraints.NONE;
    gbc.anchor = GridBagConstraints.SOUTHEAST;
    gbl.setConstraints(button, gbc);
    add(button);
    //Dialogelemente layouten
    pack();
  }

  private GridBagConstraints makegbc(
    int x, int y, int width, int height)
  {
    GridBagConstraints gbc = new GridBagConstraints();
    gbc.gridx = x;
    gbc.gridy = y;
    gbc.gridwidth = width;
    gbc.gridheight = height;
    gbc.insets = new Insets(1, 1, 1, 1);
    return gbc;
  }
}