private void AddElementInternal(GraphElement element)
{
if (element == null)
{
throw new ArgumentException("Cannot add null element");
}
if (containedElements.Contains(element))
{
throw new ArgumentException("The specified element is already contained in this scope.");
}
string reasonWhyNotAccepted = "Cannot add the specified element to this scope.";
if (!AcceptsElement(element, ref reasonWhyNotAccepted))
{
throw new ArgumentException(reasonWhyNotAccepted);
}
// Removes the element from its current scope
Scope currentScope = element.GetContainingScope();
if (currentScope != null)
{
currentScope.RemoveElement(element);
}
m_ContainedElements.Add(element);
element.SetContainingScope(this);
// To update the scope geometry whenever the added element's geometry changes
element.RegisterCallback <GeometryChangedEvent>(OnSubElementGeometryChanged);
ScheduleUpdateGeometryFromContent();
}
private void OnChildAdded(GraphElement element)
{
element.AddToClassList("stack-child-element");
element.ResetPositionProperties();
element.RegisterCallback <DetachFromPanelEvent>(OnChildDetachedFromPanel);
UpdatePlaceholderVisibility();
}
private void OnChildAdded(GraphElement element)
{
element.AddToClassList("stack-child-element");
// these capabilities should be set correctly on contruction of stackable nodes (in client/dependent code),
// -- Since the module didn't have a way of identifying stackable nodes previously, we can provide some identity here.
// TODO: Remove this once deps have an opportunity to use the flags.
element.capabilities &= ~(Capabilities.Snappable | Capabilities.Stackable | Capabilities.Groupable);
element.ResetPositionProperties();
element.RegisterCallback <DetachFromPanelEvent>(OnChildDetachedFromPanel);
UpdatePlaceholderVisibility();
}
