public void Insert(int index, VisualElement child)
{
if (child == null)
{
throw new ArgumentException("Cannot insert null child");
}
if (index > childCount)
{
throw new IndexOutOfRangeException("Index out of range: " + index);
}
if (child == m_Owner)
{
throw new ArgumentException("Cannot insert element as its own child");
}
child.RemoveFromHierarchy();
child.shadow.SetParent(m_Owner);
if (m_Owner.m_Children == null)
{
//TODO: Trigger a release on finalizer or something, this means we'll need to make the pool thread-safe as well
m_Owner.m_Children = VisualElementListPool.Get();
}
if (m_Owner.yogaNode.IsMeasureDefined)
{
m_Owner.yogaNode.SetMeasureFunction(null);
}
PutChildAtIndex(child, index);
child.SetEnabledFromHierarchy(m_Owner.enabledInHierarchy);
// child styles are dependent on topology
child.Dirty(ChangeType.Styles);
child.Dirty(ChangeType.Transform);
m_Owner.Dirty(ChangeType.Layout);
// persistent data key may have changed or needs initialization
if (!string.IsNullOrEmpty(child.persistenceKey))
{
child.Dirty(ChangeType.PersistentData);
}
}
public void Insert(int index, VisualElement child)
{
if (child == null)
{
throw new ArgumentException("Cannot insert null child");
}
if (index > childCount)
{
throw new IndexOutOfRangeException("Index out of range: " + index);
}
if (child == m_Owner)
{
throw new ArgumentException("Cannot insert element as its own child");
}
child.RemoveFromHierarchy();
child.shadow.SetParent(m_Owner);
if (m_Owner.m_Children == null)
{
//TODO: Trigger a release on finalizer or something, this means we'll need to make the pool thread-safe as well
m_Owner.m_Children = VisualElementListPool.Get();
}
if (m_Owner.yogaNode.IsMeasureDefined)
{
m_Owner.yogaNode.SetMeasureFunction(null);
}
PutChildAtIndex(child, index);
child.SetEnabledFromHierarchy(m_Owner.enabledInHierarchy);
child.IncrementVersion(VersionChangeType.Hierarchy);
m_Owner.IncrementVersion(VersionChangeType.Hierarchy);
}