protected override void UpdateElement(ZStack oldStack, Context oldContext)
{
var newCount = Element.Children.Count;
if (children.Count < newCount)
{
Context.InvalidateLayout();
var previous = children.LastOrDefault();
for (int i = children.Count; i < newCount; ++i)
{
var child = new PseudoLayer(this, Context, Element.Children[i].Child, previous);
children.Add(child);
previous = child;
}
}
else if (children.Count > newCount)
{
Context.InvalidateLayout();
for (int i = newCount; i < children.Count; ++i)
{
children[i].Dispose();
}
children.RemoveRange(newCount, children.Count - newCount);
}
for (int i = 0; i < newCount; ++i)
{
children[i].UpdateElement(Element.Children[i].Child, Context);
}
}
public ZStackNode(Node?parent, Context context, ZStack stack) : base(parent, context, stack)
{
var children = stack.Children;
this.children = new List <PseudoLayer>(children.Count);
PseudoLayer?previous = null;
foreach (var expand in children)
{
var child = new PseudoLayer(this, context, expand.Child, previous);
previous = child;
this.children.Add(child);
}
}
