public synchronized void setState(int state) {
if (this.state != state) {
for (StateObserver observer : observers) {
observer.onChangeState(this.state, state, targetList);
}
this.state = state;
if (this.state == STOP) {
targetList.clear();
}
}
}
public synchronized void scroll(Motion motion) {
for (StateObserver observer : observers) {
observer.scroll(motion);
}
}