protected void installDefaults() {
   LookAndFeel.installColorsAndFont(
       optionPane, "OptionPane.background", "OptionPane.foreground", "OptionPane.font");
   LookAndFeel.installBorder(optionPane, "OptionPane.border");
   minimumSize = UIManager.getDimension("OptionPane.minimumSize");
   LookAndFeel.installProperty(optionPane, "opaque", Boolean.TRUE);
 }
 protected void installDefaults() {
   LookAndFeel.installProperty(progressBar, "opaque", Boolean.TRUE);
   LookAndFeel.installBorder(progressBar, "ProgressBar.border");
   LookAndFeel.installColorsAndFont(
       progressBar, "ProgressBar.background", "ProgressBar.foreground", "ProgressBar.font");
   cellLength = UIManager.getInt("ProgressBar.cellLength");
   if (cellLength == 0) cellLength = 1;
   cellSpacing = UIManager.getInt("ProgressBar.cellSpacing");
   selectionForeground = UIManager.getColor("ProgressBar.selectionForeground");
   selectionBackground = UIManager.getColor("ProgressBar.selectionBackground");
 }