// To prevent CollectionContainer memory leak:
// HookUpToCollection() is called to start listening to CV only when
// the Container is being used by a CompositeCollectionView.
// When the last CCV stops using the container (or the CCV is GC'ed),
// HookUpToCollection() is called to stop listening to its CV, so that
// this container can be GC'ed if no one else is holding on to it.
// unhook old collection/view and hook up new collection/view
private void HookUpToCollection(IEnumerable newCollection, bool shouldRaiseChangeEvent)
{
// clear cached helper
_viewList = null;
// unhook from the old collection view
if (View != null)
{
CollectionChangedEventManager.RemoveHandler(View, OnCollectionChanged);
if (_traceLog != null)
{
_traceLog.Add("Unsubscribe to CollectionChange from {0}",
TraceLog.IdFor(View));
}
}
// change to the new view
if (newCollection != null)
{
_view = CollectionViewSource.GetDefaultCollectionView(newCollection, this);
}
else
{
_view = null;
}
// hook up to the new collection view
if (View != null)
{
CollectionChangedEventManager.AddHandler(View, OnCollectionChanged);
if (_traceLog != null)
{
_traceLog.Add("Subscribe to CollectionChange from {0}", TraceLog.IdFor(View));
}
}
if (shouldRaiseChangeEvent) // it's as if this were a refresh of the container's collection
{
OnContainedCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
}
}
// Token: 0x06001A5F RID: 6751 RVA: 0x0007D89C File Offset: 0x0007BA9C
private void HookUpToCollection(IEnumerable newCollection, bool shouldRaiseChangeEvent)
{
this._viewList = null;
if (this.View != null)
{
CollectionChangedEventManager.RemoveHandler(this.View, new EventHandler <NotifyCollectionChangedEventArgs>(this.OnCollectionChanged));
if (this._traceLog != null)
{
this._traceLog.Add("Unsubscribe to CollectionChange from {0}", new object[]
{
TraceLog.IdFor(this.View)
});
}
}
if (newCollection != null)
{
this._view = CollectionViewSource.GetDefaultCollectionView(newCollection, this, null);
}
else
{
this._view = null;
}
if (this.View != null)
{
CollectionChangedEventManager.AddHandler(this.View, new EventHandler <NotifyCollectionChangedEventArgs>(this.OnCollectionChanged));
if (this._traceLog != null)
{
this._traceLog.Add("Subscribe to CollectionChange from {0}", new object[]
{
TraceLog.IdFor(this.View)
});
}
}
if (shouldRaiseChangeEvent)
{
this.OnContainedCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
}
}
