public void _reparent(FocusNode child)
{
D.assert(child != null);
D.assert(child != this, () => "Tried to make a child into a parent of itself.");
if (child._parent == this)
{
D.assert(_children.Contains(child),
() => "Found a node that says it's a child, but doesn't appear in the child list.");
// The child is already a child of this parent.
return;
}
D.assert(_manager == null || child != _manager.rootScope, () => "Reparenting the root node isn't allowed.");
D.assert(!ancestors.Contains(child),
() => "The supplied child is already an ancestor of this node. Loops are not allowed.");
FocusScopeNode oldScope = child.enclosingScope;
bool hadFocus = child.hasFocus;
child._parent?._removeChild(child, removeScopeFocus: oldScope != nearestScope);
_children.Add(child);
child._parent = this;
child._ancestors = null;
child._updateManager(_manager);
foreach (FocusNode ancestor in child.ancestors)
{
ancestor._descendants = null;
}
if (hadFocus)
{
_manager?.primaryFocus?._setAsFocusedChildForScope();
}
if (oldScope != null && child.context != null && child.enclosingScope != oldScope)
{
//UnityEngine.Debug.Log("FocusTraversalGroup.of(child.context, nullOk: true)?.changedScope(node: child, oldScope: oldScope);");
FocusTraversalGroup.of(child.context, nullOk: true)?.changedScope(node: child, oldScope: oldScope);
}
if (child._requestFocusWhenReparented)
{
child._doRequestFocus(findFirstFocus: true);
child._requestFocusWhenReparented = false;
}
}
public void requestFocus(FocusNode node = null)
{
if (node != null)
{
if (node._parent == null)
{
_reparent(node);
}
D.assert(node.ancestors.Contains(this),
() =>
"Focus was requested for a node that is not a descendant of the scope from which it was requested.");
node._doRequestFocus(findFirstFocus: true);
return;
}
_doRequestFocus(findFirstFocus: true);
}