物质LaF不允许Canvas动态收缩

Active LaF: Substance.
Active Substance Skin: RavenSkin (tested with others).

import java.awt.Canvas;

import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;

import org.pushingpixels.substance.api.SubstanceLookAndFeel;
import org.pushingpixels.substance.api.skin.RavenSkin;

public class CanvasTest extends JFrame
{
    private static final long serialVersionUID = -6209080597456869531L;

    public CanvasTest()
    {
        super(\"JFrame - Canvas Test\");
        setSize(600, 400);
        setLocationRelativeTo(null);
        getContentPane().add(new Canvas());
        setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
    }

    public static void main(String[] args)
    {
        JFrame.setDefaultLookAndFeelDecorated(true);
        SwingUtilities.invokeLater(new Thread() {
            public void run()
            {
                try
                {
                    UIManager.setLookAndFeel(\"org.pushingpixels.substance.\" +
                    \"api.skin.SubstanceBusinessLookAndFeel\");
                }
                catch (Exception e)
                {
                    e.printStackTrace();
                }
                SubstanceLookAndFeel.setSkin(new RavenSkin());
            }
        });

        new CanvasTest().setVisible(true);
    }
}