🚀 go-pugleaf

I want to enforce a minimum size on my dialogs.  But when I override
Component.getMinimumSize() the user can still resize my dialogs to just the
title bar.

I have programmed a SizeEnforcer (see code sample below), but it is not
elegant.  I am worried that it could cause infinite loops in a fight with
other listeners.

It there a way to get Swing to use getMinimumSize() earlier, eg while the
user is dragging resizable Dialog borders?

Thanks for any advice,
Adam.

**********************

package test;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

class SizeEnforcer extends ComponentAdapter {
  public void componentResized(ComponentEvent e) {
    Component c=e.getComponent();
    Dimension d1=c.getMinimumSize();
    Dimension d2=c.getSize();
    Dimension d3=c.getMaximumSize();
    int w=Math.max(d1.width,Math.min(d2.width,d3.width));
    int h=Math.max(d1.height,Math.min(d2.height,d3.height));
    if (w!=d2.width || h!=d2.height)
      c.setSize(w,h);
  }
}

public class Test {
  public static void main(String[] args) {
    final JDialog dlg=new JDialog((JFrame)null,"Test",true) {
      public Dimension getPreferredSize() {
        return new Dimension(256,192);
      }
      public Dimension getMinimumSize() {
        return new Dimension(128,128);
      }
      public Dimension getMaximumSize() {
        return new Dimension(512,512);
      }
    };
    dlg.pack();
    dlg.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });

    dlg.addComponentListener(new SizeEnforcer());
    dlg.show();
  }
}