public void actionPerformed(ActionEvent event) {
if (scene.canRemove()) // If shapes can be removed
{
scene.removeSelected();
// if no more objects can be removed, disable this action
if (!scene.canRemove()) {
setEnabled(false);
}
// check if the opposites can be enabled.
checkOpposite();
} else { // disable this action, check if opposites can be enabled
setEnabled(false);
checkOpposite();
}
}
/** Checks if the opposite actions should be enabled/disabled */
public void checkOpposite() {
for (int i = 0; i < opposite.size(); i++) {
if (scene.canAdd(opposite.get(i).getName())) opposite.get(i).setEnabled(true);
else opposite.get(i).setEnabled(false);
}
}