/**
* Sets an activity indicator on this Alert.
*
* @param newIndicator the activity indicator for this Alert, or null if there is none
* @throws IllegalArgumentException if indicator does not meet the restrictions for its use in an
* Alert
*/
public void setIndicator(Gauge newIndicator) {
if (newIndicator != null && !newIndicator.isSuitableForAlert()) {
throw new IllegalArgumentException(MsgRepository.ALERT_EXCEPTION_INVALID_INDICATOR);
}
// remove old Gauge parent
if (indicator != null) {
indicator.setParent(null);
}
// store the indicator
indicator = newIndicator;
// set new Gauge parent
if (indicator != null) {
indicator.setParent(this);
}
updateIndicator();
}
