public void Add(Fragment fragment)
{
fragment.Layer = this;
AddSpatialIndex(fragment, Items.Count);
Items.Add(fragment);
Height = Math.Max(Height, fragment.Bounds.Bottom);
if (fragment.IsSelectable)
{
if (nextSelectable != null)
{
nextSelectable.Fragment = fragment;
nextSelectable = null;
}
previousSelectable = fragment;
}
else
{
if (nextSelectable == null)
{
nextSelectable = new FragmentRef();
}
fragment.PreviousSelectable = previousSelectable;
fragment.NextSelectable = nextSelectable;
}
}
public virtual void Clear()
{
Container.Children.Clear();
foreach (var item in Items)
{
item.Recycle();
}
SpatialIndex.Clear();
Items.Clear();
Height = 0;
nextSelectable = null;
previousSelectable = null;
}
