| final protected isDescendentOf ( $ancestor ) : boolean | ||
| 리턴 | boolean | if the control is a descendent (parent, parent of parent, etc.) of the specified control |
protected final function isDescendentOf($ancestor)
{
$control = $this;
while ($control !== $ancestor && $control->_parent) {
$control = $control->_parent;
}
return $control === $ancestor;
}