public void setPosition(Point2D position) {
Point2D oldPosition = this.position.copy();
Point2D newPosition = position.copy();
if (positionListenerEntries != null) {
for (PositionListenerEntry positionListenerEntry : positionListenerEntries) {
if (!positionListenerEntry.listener.beforeChangePosition(oldPosition.copy(), newPosition)) {
return;
}
}
}
this.position = this.new ListeningPoint2D(newPosition);
if (positionListenerEntries != null) {
for (PositionListenerEntry positionListenerEntry : positionListenerEntries) {
positionListenerEntry.listener.afterChangePosition(oldPosition.copy(), newPosition.copy());
}
}
}
@Nonnull
private Point2D onChange(@Nonnull Point2D oldPosition, @Nonnull Point2D newPosition) {
if (positionListenerEntries != null) {
for (PositionListenerEntry positionListenerEntry : positionListenerEntries) {
if (!positionListenerEntry.listener.beforeChangePosition(
oldPosition.copy(), newPosition)) {
return this;
}
}
}
super.setFirst(newPosition.getFirst());
super.setSecond(newPosition.getSecond());
if (positionListenerEntries != null) {
for (PositionListenerEntry positionListenerEntry : positionListenerEntries) {
positionListenerEntry.listener.afterChangePosition(
oldPosition.copy(), newPosition.copy());
}
}
return this;
}