/**
* @param group will replace the internally managed group. All current children will be moved to
* this group.
*/
@Override
public void setActor(final WidgetGroup group) {
if (group == null) {
throw new IllegalArgumentException("Group cannot be null.");
}
final Group previousGroup = getActor();
super.setActor(group);
attachListener(); // Attaches draggable to all previous group children.
for (final Actor child : previousGroup.getChildren()) {
group.addActor(child); // No need to attach draggable, child was already in pane.
}
}
/** @param draggable will be automatically added to all children. */
public void setDraggable(final Draggable draggable) {
removeListener();
this.draggable = draggable;
attachListener();
}