protected override void InsertItem(int index, T item)
{
ValidateItem(item);
var args = new CollectionItemEventArgs <T>(item);
OnItemAdding(args);
base.InsertItem(index, item);
OnItemAdded(args);
OnChanged();
}
protected override void RemoveItem(int index)
{
var item = this[index];
var args = new CollectionItemEventArgs <T>(item);
OnItemRemoving(args);
base.RemoveItem(index);
OnItemRemoved(args);
OnChanged();
}
protected override void SetItem(int index, T item)
{
ValidateItem(item);
var oldItem = this[index];
var removeArgs = new CollectionItemEventArgs <T>(oldItem);
OnItemRemoving(removeArgs);
var addArgs = new CollectionItemEventArgs <T>(item);
OnItemAdding(addArgs);
base.SetItem(index, item);
OnItemRemoved(removeArgs);
OnItemAdded(addArgs);
OnChanged();
}
protected virtual void OnItemRemoved(CollectionItemEventArgs <T> args)
{
Fire(ItemRemoved, args);
}
protected void OnItemRemoving(CollectionItemEventArgs <T> args)
{
Fire(ItemRemoving, args);
}