/// <summary>
/// Implementation of the <see cref="ICollectionChangedListener" /> interface.
/// </summary>
/// <param name="sender">The collection sending the event.</param>
/// <param name="e">The event args.</param>
public void OnCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
foreach (Slot slot in e.NewItems)
{
WeakPropertyChangedListener newListener = WeakPropertyChangedListener.CreateIfNecessary(slot, this);
if (newListener != null)
{
this.specialSlotsPropertyChangedListeners.Add(newListener);
}
}
break;
case NotifyCollectionChangedAction.Remove:
if (this.specialSlotsPropertyChangedListeners != null && this.specialSlotsPropertyChangedListeners.Count > 0)
{
foreach (Slot slot in e.OldItems)
{
WeakPropertyChangedListener oldPropertyListener = this.specialSlotsPropertyChangedListeners[e.OldStartingIndex];
if (oldPropertyListener != null)
{
this.specialSlotsPropertyChangedListeners.Remove(oldPropertyListener);
oldPropertyListener.Detach();
oldPropertyListener = null;
}
}
}
this.owner.timeRulerLayer?.RecycleSlots(e.OldItems.Cast <Slot>());
break;
case NotifyCollectionChangedAction.Move:
case NotifyCollectionChangedAction.Replace:
WeakPropertyChangedListener propertyListener = this.specialSlotsPropertyChangedListeners[e.OldStartingIndex];
if (propertyListener != null)
{
this.specialSlotsPropertyChangedListeners.Remove(propertyListener);
propertyListener.Detach();
propertyListener = null;
}
WeakPropertyChangedListener listener = WeakPropertyChangedListener.CreateIfNecessary(e.NewItems[0], this);
if (listener != null)
{
this.specialSlotsPropertyChangedListeners.Add(listener);
}
break;
case NotifyCollectionChangedAction.Reset:
break;
default:
break;
}
if (sender == this.SpecialSlotsSource)
{
this.Invalide(MultiDayViewUpdateFlag.AffectsSpecialSlots);
}
}
