import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;

import javax.swing.JButton;
import javax.swing.JFrame;

public class GridWindow extends JFrame {
    
    public GridWindow() {
        this.setSize(200, 200);
        this.setLocationRelativeTo(null);
        this.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);

        this.getContentPane().setLayout(new GridBagLayout());

        this.placeButtons();

        this.addWindowListener(new GridWindowClosedEvent(this));
    }

    private void placeButtons() {
        GridBagConstraints constraints = new GridBagConstraints();

        JButton one = new JButton("1");
        constraints.gridx = 0; 
        constraints.gridy = 0;
        constraints.gridwidth = 2; 
        constraints.gridheight = 1;
        constraints.fill = GridBagConstraints.BOTH;
        constraints.insets = new Insets(0, 0, 0, 0);
        constraints.weightx = 1.0;
        constraints.weighty = 1.0;

        this.getContentPane().add(one, constraints);

        JButton two = new JButton("2");
        constraints.gridx = 2; 
        constraints.gridy = 0;
        constraints.gridwidth = 1; 
        constraints.gridheight = 2;
        constraints.fill = GridBagConstraints.BOTH;
        constraints.insets = new Insets(0, 0, 0, 0);
        constraints.weightx = 1.0;
        constraints.weighty = 1.0;

        this.getContentPane().add(two, constraints);

        JButton three = new JButton("3");
        constraints.gridx = 1; 
        constraints.gridy = 2;
        constraints.gridwidth = 2; 
        constraints.gridheight = 1;
        constraints.fill = GridBagConstraints.BOTH;
        constraints.insets = new Insets(0, 0, 0, 0);
        constraints.weightx = 1.0;
        constraints.weighty = 1.0;

        this.getContentPane().add(three, constraints);

        JButton four = new JButton("4");
        constraints.gridx = 0; 
        constraints.gridy = 1;
        constraints.gridwidth = 1; 
        constraints.gridheight = 2;
        constraints.fill = GridBagConstraints.BOTH;
        constraints.insets = new Insets(0, 0, 0, 0);
        constraints.weightx = 1.0;
        constraints.weighty = 1.0;

        this.getContentPane().add(four, constraints);

        JButton five = new JButton("5");
        constraints.gridx = 1; 
        constraints.gridy = 1;
        constraints.gridwidth = 1; 
        constraints.gridheight = 1;
        constraints.fill = GridBagConstraints.NONE;
        constraints.insets = new Insets(0, 0, 0, 0);
        constraints.weightx = 0.0;
        constraints.weighty = 0.0;

        this.getContentPane().add(five, constraints);
    }
}