Span/Grow bug in MigLayout?

java, miglayout

Solution

Found a workaround, though not entirely satisfactory. According to this forum post and this forum post, MigLayout switches from calculating component sizes, to calculating column sizes where a span is involved. Replacing "fill" with "filly" in the layout contraints, then adding column constraints with "grow" for each column that should be allowed to grow seems to fix it.

Working code:

import javax.swing.JComboBox;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;

import net.miginfocom.swing.MigLayout;

public class MigBug extends JFrame {

    public static void main(String args[]) {
        MigBug migbug = new MigBug();
        migbug.pack();
        migbug.setVisible(true);
    }

    public MigBug() {
        JPanel content = new JPanel();
        content.setLayout(new MigLayout("filly, debug", "[][grow][][grow]"));

        content.add(new JLabel("Label 1"));
        content.add(new JComboBox());

        content.add(new JLabel("Label 2"));
        content.add(new JTextField(25), "growx, wrap");

        content.add(new JLabel("BIG"), "span, w :400:, h :200:, grow");

        setContentPane(content);
    }
}

Problem

Original source