/**
* Sets parent container
*
* @param \Zend\Navigation\Container $parent [optional] new parent to set.
* Default is null which will set
* no parent.
* @return \Zend\Navigation\AbstractPage fluent interface, returns self
*/
public function setParent(Container $parent = null)
{
if ($parent === $this) {
throw new Exception('A page cannot have itself as a parent');
}
// return if the given parent already is parent
if ($parent === $this->_parent) {
return $this;
}
// remove from old parent
if (null !== $this->_parent) {
$this->_parent->removePage($this);
}
// set new parent
$this->_parent = $parent;
// add to parent if page and not already a child
if (null !== $this->_parent && !$this->_parent->hasPage($this, false)) {
$this->_parent->addPage($this);
}
return $this;
}
