GridBagLayout - different row size

Question

normally, i'm not that bad with Swing and the different Layouts, but this one is really bugging me out.

What's wrong on the following chart using GridBagLayout? Every thick rectange is an JPanel. The thin lines are just helper for the right y values.

Thanks in advance!

package at;

import java.awt.Color;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class GridMask extends JFrame {

JPanel jPanel1, jPanel2, jPanel3, jPanel4, jPanel5, jPanel6;

public GridMask() {
    unimportantStuff();

    GridBagLayout gbl = new GridBagLayout();
    setLayout(gbl);

    GridBagConstraints gbc;

    gbc = getGbc(0, 0, 3, 1, 0.5);
    gbl.setConstraints(jPanel1, gbc);

    gbc = getGbc(1, 0, 4, 1, 0.75);
    gbl.setConstraints(jPanel2, gbc);

    gbc = getGbc(2, 0, 3, 1, 0.5);
    gbl.setConstraints(jPanel3, gbc);

    gbc = getGbc(0, 3, 3, 1, 0.5);
    gbl.setConstraints(jPanel4, gbc);

    gbc = getGbc(1, 4, 2, 1, 0.25);
    gbl.setConstraints(jPanel5, gbc);

    gbc = getGbc(2, 3, 3, 1, 0.5);
    gbl.setConstraints(jPanel6, gbc);

    add(jPanel1);
    add(jPanel2);
    add(jPanel3);
    add(jPanel4);
    add(jPanel5);
    add(jPanel6);

    setVisible(true);
}

private GridBagConstraints getGbc(int x, int y, int height, int width, double weightY) {
    GridBagConstraints gbc = new GridBagConstraints();
    gbc.gridx = x;
    gbc.gridy = y;
    gbc.gridheight = height;
    gbc.gridwidth = width;
    gbc.fill = GridBagConstraints.BOTH;
    gbc.weightx = 1.0;
    gbc.weighty = weightY;

    return gbc;
}

private void unimportantStuff() {
    jPanel1 = new javax.swing.JPanel();
    jPanel2 = new javax.swing.JPanel();
    jPanel3 = new javax.swing.JPanel();
    jPanel4 = new javax.swing.JPanel();
    jPanel5 = new javax.swing.JPanel();
    jPanel6 = new javax.swing.JPanel();

    jPanel1.setBorder(BorderFactory.createLineBorder(Color.BLACK));
    jPanel2.setBorder(BorderFactory.createLineBorder(Color.BLACK));
    jPanel3.setBorder(BorderFactory.createLineBorder(Color.BLACK));
    jPanel4.setBorder(BorderFactory.createLineBorder(Color.BLACK));
    jPanel5.setBorder(BorderFactory.createLineBorder(Color.BLACK));
    jPanel6.setBorder(BorderFactory.createLineBorder(Color.BLACK));
}

public static void main(String[] args) {
    new GridMask();
}
}

The result is a JFrame where the two rows have different heights, but the cells in a row have all the same height.

Answer 1

but the cells in a row have all the same height.

gbc.fill = GridBagConstraints.BOTH;

You are telling the layout to size all the components to fill the space available in each cell.