protected virtual void OnItemsSourceChanged(IEnumerable oldValue, IEnumerable newValue)
{
MontuItems.Clear();
ClearSelectedItem();
if (MontuContentPresenter != null)
{
MontuContentPresenter.Content = null;
}
if (newValue != null)
{
foreach (var item in newValue)
{
var mI = new MontuBoxItem()
{
Content = item,
Style = MontuBoxItemStyle,
CheckBoxStyle = CheckboxStyle,
DataContext = item
};
mI.IsSelectedChanged -= OnMontuItemIsSelectedChanged;
MontuItems.Add(mI);
mI.IsSelectedChanged += OnMontuItemIsSelectedChanged;
}
var x = newValue as INotifyCollectionChanged;
if (x != null)
{
x.CollectionChanged -= OnItemCollectionChanged;
x.CollectionChanged += OnItemCollectionChanged;
}
}
if (oldValue != null)
{
var x = oldValue as INotifyCollectionChanged;
if (x != null)
{
x.CollectionChanged -= OnItemCollectionChanged;
}
}
}
private void OnItemCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.Action == NotifyCollectionChangedAction.Add && e.NewItems != null)
{
foreach (var item in e.NewItems)
{
var mI = new MontuBoxItem()
{
Content = item,
Style = MontuBoxItemStyle,
CheckBoxStyle = CheckboxStyle,
DataContext = item
};
mI.IsSelectedChanged -= OnMontuItemIsSelectedChanged;
MontuItems.Add(mI);
mI.IsSelectedChanged += OnMontuItemIsSelectedChanged;
}
}
else if (e.Action == NotifyCollectionChangedAction.Remove && e.OldItems != null)
{
foreach (var item in e.OldItems)
{
var removeItem = MontuItems.Where(i => i.Content.Equals(item))
.FirstOrDefault();
if (removeItem != null)
{
removeItem.IsSelectedChanged -= OnMontuItemIsSelectedChanged;
MontuItems.Remove(removeItem);
RemoveSelectedItem(removeItem);
}
}
}
}
