Resize content of DialogWrapper when its size changes

Hello there,

my plugin shows a DialogWrapper that contains a JPanel (with a LanguageTextField).

When I change the size od the DialogWrapper, the size of JPanel does not change. How can I make it to always fill the whole DialogWrapper?

My DialogWrapper implementation looks like this:

 
public class EditorWrapper extends DialogWrapper {

    private JPanel panel = new JPanel();

    private EditorTextField editorTextField;

    protected EditorWrapper(Language language, Project project, String text) {
        super(project);
        super.setOKActionEnabled(false);

        init();

        editorTextField = new LanguageTextField(language, project, text);
        editorTextField.setOneLineMode(false);
        editorTextField.setPreferredSize(new Dimension(800, 600));

        editorTextField.setVisible(true);

        panel.add(editorTextField);
    }

    @Override
    protected JComponent createCenterPanel() {
        return panel;
    }
}