import java.awt.Button;
import java.awt.Frame;
import java.awt.GridBagConstraints;
import java.awt.Panel;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class LayoutTest {
    public LayoutTest() {
        Frame frame = new Frame("LayoutTest");
        frame.setBounds(100, 100, 400, 400);
        frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(1);
            }
        });
 
        System.out.println("construct GridBag");
        GridBagConstraints con = new GridBagConstraints();
        MyGridBagLayout gridbag = new MyGridBagLayout();

        frame.setLayout(gridbag);
 
        con.fill = GridBagConstraints.BOTH;
        con.weightx = 1.0;
        Button button = new Button("Button1");
        gridbag.setConstraints(button, con);

        System.out.println("Frame#add(Button1)");
        frame.add(button);
 
        con.gridwidth = GridBagConstraints.RELATIVE;
        button = new Button("Button2");
        gridbag.setConstraints(button, con);

        System.out.println("Frame#add(Button2)");
        frame.add(button);
 
        con.gridwidth = GridBagConstraints.REMAINDER;
        button = new Button("Button3");
        gridbag.setConstraints(button, con);

        System.out.println("Frame#add(Button3)");
        frame.add(button);
 
        frame.setVisible(true);
    }
 
    public static void main(String[] args) {
        new LayoutTest();
    }
}