// Note that this is overridden in FocusScopeNode.
public virtual void _doRequestFocus(bool findFirstFocus = false)
{
D.assert(findFirstFocus != null);
if (!canRequestFocus)
{
D.assert(FocusManagerUtils._focusDebug(
$"Node NOT requesting focus because canRequestFocus is false: {this}"));
return;
}
if (_parent == null)
{
_requestFocusWhenReparented = true;
return;
}
_setAsFocusedChildForScope();
if (hasPrimaryFocus && (_manager._markedForFocus == null || _manager._markedForFocus == this))
{
return;
}
_hasKeyboardToken = true;
D.assert(FocusManagerUtils._focusDebug($"Node requesting focus: {this}"));
_markNextFocus(this);
}
public void unfocus(
UnfocusDisposition disposition = UnfocusDisposition.scope
)
{
D.assert(disposition != null);
if (!hasFocus && (_manager == null || _manager._markedForFocus != this))
{
return;
}
FocusScopeNode scope = enclosingScope;
if (scope == null)
{
return;
}
switch (disposition)
{
case UnfocusDisposition.scope:
if (scope.canRequestFocus)
{
scope._focusedChildren.Clear();
}
while (!scope.canRequestFocus)
{
scope = scope.enclosingScope ?? _manager?.rootScope;
}
scope?._doRequestFocus(findFirstFocus: false);
break;
case UnfocusDisposition.previouslyFocusedChild:
if (scope.canRequestFocus)
{
scope?._focusedChildren?.Remove(this);
}
while (!scope.canRequestFocus)
{
scope.enclosingScope?._focusedChildren?.Remove(scope);
scope = scope.enclosingScope ?? _manager?.rootScope;
}
scope?._doRequestFocus(findFirstFocus: true);
break;
}
D.assert(FocusManagerUtils._focusDebug("Unfocused node:",
new List <string> {
$"primary focus was {this}", $"next focus will be {_manager?._markedForFocus}"
}));
}
public void _setAsFocusedChildForScope()
{
FocusNode scopeFocus = this;
foreach (var ancestor in ancestors)
{
if (ancestor is FocusScopeNode)
{
D.assert(scopeFocus != ancestor, () => "Somehow made a loop by setting focusedChild to its scope.");
D.assert(FocusManagerUtils._focusDebug($"Setting {scopeFocus} as focused child for scope:",
new List <string> {
ancestor.ToString()
}));
((FocusScopeNode)ancestor)._focusedChildren.Remove(scopeFocus);
((FocusScopeNode)ancestor)._focusedChildren.Add(scopeFocus);
scopeFocus = ancestor;
}
}
}
public void detach()
{
D.assert(_node != null);
D.assert(FocusManagerUtils._focusDebug("Detaching node:", new List <string> {
_node.ToString(), $"With enclosing scope {_node.enclosingScope}"
}));
if (isAttached)
{
if (_node.hasPrimaryFocus || (_node._manager != null && _node._manager._markedForFocus == _node))
{
_node.unfocus(disposition: UnfocusDisposition.previouslyFocusedChild);
}
_node._manager?._markDetached(_node);
_node._parent?._removeChild(_node);
_node._attachment = null;
D.assert(!_node.hasPrimaryFocus);
D.assert(_node._manager?._markedForFocus != _node);
}
D.assert(!isAttached);
}