public Dimension getPreferredSize(JComponent c) {
Dimension size = super.getPreferredSize(c);
if (comboBox.getGraphics() != null) {
FontMetrics fm =
Utilities.getFontMetrics(comboBox, comboBox.getGraphics(), comboBox.getFont());
size.height = fm.getHeight() + 2;
if (UIManager.getLookAndFeel() instanceof BaseLookAndFeel) {
BaseLookAndFeel laf = (BaseLookAndFeel) UIManager.getLookAndFeel();
size.height =
Math.max(size.height, laf.getIconFactory().getDownArrowIcon().getIconHeight() + 2);
}
}
return new Dimension(size.width + 2, size.height + 2);
}
