private void IntitiateDatabind(IEnumerable oldItems, IEnumerable items)
{
if (this.tagPanel != null)
{
if (oldItems is INotifyCollectionChanged)
{
((INotifyCollectionChanged)items).CollectionChanged -= ItemsSourceCollectionChanged;
}
this.tagPanel.Children.Clear();
if (items is INotifyCollectionChanged)
{
((INotifyCollectionChanged)items).CollectionChanged += ItemsSourceCollectionChanged;
}
foreach (var current in items)
{
AddTag(NewUnresolved());
var resolvedTag = new ResolvedTag
{
DataContext = current
};
if (TagStyle != null)
{
resolvedTag.Style = TagStyle;
}
AddTag(resolvedTag);
}
AddTag(NewUnresolved());
}
}
private void InsertItem(int index, object item)
{
var children = this.tagPanel.Children;
var resolvedTag = new ResolvedTag {
DataContext = item
};
if (TagStyle != null)
{
resolvedTag.Style = TagStyle;
}
var resolvedTag2 = resolvedTag;
resolvedTag2.ShowAddAnimation = true;
InsertTag(index, resolvedTag2);
if (index == 0)
{
InsertTag(index, NewUnresolved());
}
if (children.IndexOf(resolvedTag2) == children.Count - 1)
{
InsertTag(children.IndexOf(resolvedTag2) + 1, NewUnresolved());
}
if (!(children[children.IndexOf(resolvedTag2) - 1] is UnresolvedTag))
{
InsertTag(children.IndexOf(resolvedTag2), NewUnresolved());
}
if (!(children[children.IndexOf(resolvedTag2) + 1] is UnresolvedTag))
{
InsertTag(children.IndexOf(resolvedTag2) + 1, NewUnresolved());
}
var relativeIndex = GetRelativeIndex(resolvedTag2);
EnableChangePropagation = false;
if (!Propagating)
{
ItemsSource?.Insert(relativeIndex, item);
}
EnableChangePropagation = true;
resolvedTag2.AddCompleted += delegate {
tagScrollViewer.ScrollIntoView(resolvedTag);
};
}