public void actionPerformed(ActionEvent e) {
Object source = e.getSource();
if (source instanceof UMLComboBox2) {
UMLComboBox2 box = (UMLComboBox2) source;
Object diagram = box.getTarget();
Object homeModel = box.getSelectedItem();
if (diagram instanceof Relocatable) {
Relocatable d = (Relocatable) diagram;
if (d.isRelocationAllowed(homeModel)) {
d.relocate(homeModel);
}
}
}
}
