/// <summary>
/// Changes the node's Parent. This will automatically handle moving the widget
/// into the new space and handling references such as `.Parent` and children.
/// </summary>
public virtual CogaNode SetParent(CogaNode parent)
{
if (Parent != null)
{
Parent.Children.Remove(this);
Parent.OnChildRemoved?.Invoke(Parent, this);
Parent.SetChildrenDirty();
Parent.SetDirty();
OnActiveChange = null;
}
Parent = parent;
Parent.OnActiveChange += (node) => { OnActiveChange?.Invoke(this); };
Parent.SetChildrenDirty();
if (!Parent.Children.Contains(this))
{
Parent.Children.Add(this);
}
if (Parent.Manager != null)
{
PropagateManager(this, Parent.Manager);
}
return(this);
}
public CogaNode SetActive(bool active = true)
{
IsActive = active;
SetDirty();
SetChildrenDirty();
// Turning inactive will stop a layout from being triggered,
// so manually trigger it now for listeners that need to know its disabled.
TriggerLayout();
OnActiveChange?.Invoke(this);
return(this);
}
public virtual void ActivationUpdate(ElementManagerLeaf elementManagerLeaf, bool isActive)
{
bool oldActive = Active;
if (_activationExpression != null && _activationExpression.UsedIdentifiers.Contains(elementManagerLeaf.Identifier))
{
Active = _activationExpression.Result;
}
if (oldActive != Active && OnActiveChange != null)
{
OnActiveChange.Invoke(Identifier, Active);
}
}
protected void InvokeActiveChange(string identifier, bool active)
{
OnActiveChange?.Invoke(identifier, active);
}