private void _wrappedCollection_CollectionChanged(object sender, Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
if (_notificationsLockCount == 0)
{
CollectionChanged(this, e);
}
}
void collection_CollectionChanged(object sender, Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
if (!IsTrackedNodeAlive)
{
return;
}
this.UpdateChildren(e);
}
void InternalChildren_CollectionChanged(object sender, Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
if (e.Action == Collections.Specialized.NotifyCollectionChangedAction.Remove)
{
foreach (TreeViewItemViewModel item in e.OldItems)
{
this.ChildrenValueCache.Remove(item.GetValue());
}
}
}
protected override void OnItemsChanged(Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
if (e.Action == Collections.Specialized.NotifyCollectionChangedAction.Remove)
{
// Don't select itself when its child items got removed. (Default action of base.OnItemsChanged)
// The selection should be managed by designer surface.
return;
}
base.OnItemsChanged(e);
}
public void Handler(object sender, Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
var target = _targetReference.Target;
if (target == null)
{
return;
}
var callback = (Action <object, Collections.Specialized.NotifyCollectionChangedEventArgs>)_method.CreateDelegate(typeof(Action <object, Collections.Specialized.NotifyCollectionChangedEventArgs>), target);
callback?.Invoke(sender, e);
}
protected override void UpdateOnAdd(Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
base.UpdateOnAdd(e);
var indexInSource = e.NewStartingIndex;
foreach (var item in e.NewItems.OfType <T>())
{
UpdateOnInsert(_source.Rewind(e), indexInSource, item);
indexInSource++;
}
}
protected override void UpdateOnMove(Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
base.UpdateOnMove(e);
for (int indexInEvent = 0; indexInEvent < e.NewItems.Count; indexInEvent++)
{
int newIndexInSource = e.NewStartingIndex + indexInEvent;
int oldIndexInSource = e.OldStartingIndex + indexInEvent;
var item = (T)e.OldItems[indexInEvent];
UpdateOnMove(_source.Rewind(e), newIndexInSource, oldIndexInSource, item);
}
}
protected override void UpdateOnReplace(Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
base.UpdateOnReplace(e);
for (int indexInEvent = 0; indexInEvent < e.NewItems.Count; indexInEvent++)
{
int indexInSource = e.NewStartingIndex + indexInEvent;
var oldItem = (T)e.OldItems[indexInEvent];
var newItem = (T)e.NewItems[indexInEvent];
if (!_comparer.Equals(oldItem, newItem))
{
UpdateOnReplace(_source.Rewind(e), indexInSource, newItem, oldItem);
}
}
}
private void ControlsCollection_CollectionChanged(object sender, Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
if (e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Add)
{
foreach (var ctrl in e.NewItems.Cast <Control>())
{
ctrl.Parent = Parent;
}
}
else if (e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Remove)
{
foreach (var ctrl in e.OldItems.Cast <Control>())
{
ctrl.Parent = null;
}
}
}
protected override void UpdateOnReset(Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
base.UpdateOnReset(e);
Clear();
}
private void Items_CollectionChanged(object sender, Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
ItemsChanged(e).Wait();
}
