/**
* Removes an entity from the map.
*
* @param entity the entity to remove
*/
public void removeEntity(MapEntity entity) {
allEntities[entity.getLayer().getId()].remove(entity);
setChanged();
notifyObservers();
}
/**
* Changes the layer of an entity. You should call this method instead of calling directly
* MapEntity.setLayer(), because the entity of the 3 layers are stored in 3 different structures.
* If the entity is not known by the map (yet), this method just calls MapEntity.setLayer().
*
* @param entity the entity to change the layer
* @param layer the new layer
*/
public void setEntityLayer(MapEntity entity, Layer layer) {
Layer oldLayer = entity.getLayer();
if (layer != oldLayer) {
entity.setLayer(layer);
if (allEntities[oldLayer.getId()].remove(entity)) {
allEntities[layer.getId()].add(entity);
}
setChanged();
notifyObservers();
}
}
/**
* Brings the specified entities to the front, keeping their layer. The order of the specified
* entities in the map is unchanged.
*
* @param entities the entities to move
*/
public void bringToFront(List<MapEntity> entities) {
List<MapEntity> sortedEntities = getSortedEntities(entities);
// bring to front each entity from sortedEntities
ListIterator<MapEntity> iterator = sortedEntities.listIterator(0);
while (iterator.hasNext()) {
MapEntity entity = iterator.next();
Layer layer = entity.getLayer();
allEntities[layer.getId()].remove(entity);
allEntities[layer.getId()].addLast(entity);
}
setChanged();
notifyObservers();
}
/**
* Brings the specified entities to the back, keeping their layer. The order of the specified
* entities in the map is unchanged.
*
* @param entities the entities to move
*/
public void bringToBack(List<MapEntity> entities) {
List<MapEntity> sortedEntities = getSortedEntities(entities);
// bring to back each entity from sortedEntities
ListIterator<MapEntity> iterator = sortedEntities.listIterator(sortedEntities.size());
while (iterator.hasPrevious()) {
MapEntity entity = iterator.previous();
Layer layer = entity.getLayer();
allEntities[layer.getId()].remove(entity);
allEntities[layer.getId()].addFirst(entity);
}
setChanged();
notifyObservers();
}
