/**
* Creates and shows the combo box.
*
* @param sl strings to be added
*/
private void createCombo(final StringList sl) {
if (sl == null || sl.size() == 0) {
pop.setVisible(false);
return;
}
if (comboChanged(sl)) {
box.setModel(new DefaultComboBoxModel(sl.toArray()));
box.setSelectedIndex(-1);
pop = new ComboPopup(box);
}
final int w = getFontMetrics(getFont()).stringWidth(pre);
pop.show(this, Math.min(getWidth(), w), getHeight());
}
