/// <summary>
/// Calculates the size of the box layout container.
/// </summary>
/// <param name="obj">The container to lay out.</param>
/// <param name="args">The parameters to use for layout.</param>
/// <param name="direction">The direction which is being calculated.</param>
/// <returns>The minimum and preferred box layout size.</returns>
private static LayoutResults Calc(GameObject obj, BoxLayoutParams args,
PanelDirection direction)
{
var transform = obj.AddOrGet <RectTransform>();
int n = transform.childCount;
var result = new LayoutResults(direction, n);
var components = ListPool <ILayoutElement, BoxLayoutGroup> .Allocate();
for (int i = 0; i < n; i++)
{
var child = transform.GetChild(i)?.gameObject;
if (child != null && child.activeInHierarchy)
{
// Only on active game objects
components.Clear();
child.GetComponents(components);
var hc = PUIUtils.GetSize(child, direction, components);
if (args.Direction == direction)
{
result.Accum(hc, args.Spacing);
}
else
{
result.Expand(hc);
}
result.children.Add(hc);
}
}
components.Recycle();
return(result);
}