/// <summary>
/// Removes the element at the specified index of the collection.
/// </summary>
/// <param name="index">The zero-based index of the element to remove.</param>
protected override void RemoveItem(int index)
{
// Remember the removedElement
ChartNamedElement removedElement = index < Count ? this[index] : null;
if (_disableDeleteCount == 0)
{
((INameController)this).OnNameReferenceChanged(new NameReferenceChangedEventArgs(removedElement, null));
}
base.RemoveItem(index);
if (_disableDeleteCount == 0)
{
// All elements referencing the removed element will be redirected to the first element in collection
// Fire the NameReferenceChanged event to update all the dependent elements
ChartNamedElement defaultElement = Count > 0 ? this[0] : null;
((INameController)this).OnNameReferenceChanged(new NameReferenceChangedEventArgs(removedElement, defaultElement));
}
}
/// <summary>
/// Replaces the element at the specified index.
/// </summary>
/// <param name="index">The zero-based index of the element to replace.</param>
/// <param name="item">The new value for the element at the specified index.</param>
protected override void SetItem(int index, T item)
{
if (String.IsNullOrEmpty(item.Name))
{
item.Name = NextUniqueName();
}
else if (!IsUniqueName(item.Name) && IndexOf(item.Name) != index)
{
throw new ArgumentException(SR.ExceptionNameAlreadyExistsInCollection(item.Name, GetType().Name));
}
//If the item references other named references we might need to fix the references
FixNameReferences(item);
// Remember the removedElement
ChartNamedElement removedElement = index < Count ? this[index] : null;
((INameController)this).OnNameReferenceChanging(new NameReferenceChangedEventArgs(removedElement, item));
base.SetItem(index, item);
// Fire the NameReferenceChanged event to update all the dependent elements
((INameController)this).OnNameReferenceChanged(new NameReferenceChangedEventArgs(removedElement, item));
}
public NameReferenceChangedEventArgs(ChartNamedElement oldElement, string oldName, string newName)
{
_oldElement = oldElement;
_oldName = oldName;
_newName = newName;
}
public NameReferenceChangedEventArgs(ChartNamedElement oldElement, ChartNamedElement newElement)
{
_oldElement = oldElement;
_oldName = oldElement != null ? oldElement.Name : string.Empty;
_newName = newElement != null ? newElement.Name : string.Empty;
}