private void OnSelectedIndices_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.Action == NotifyCollectionChangedAction.Add && ChangeSource != ChangeSourceEnum.FromSelectedItems)
{
var index = (int)e.NewItems[0];
if (index >= Items.Count || index < 0)
{
if (SelectedIndices.IndexOf(index) != -1)
{
ChangeSource = ChangeSourceEnum.FromSelectedItems;
SelectedIndices.Remove(index);
ChangeSource = ChangeSourceEnum.None;
}
return;
}
if (SelectedIndices.Where(x => x == index).Count() > 1)
{
ChangeSource = ChangeSourceEnum.FromSelectedItems;
SelectedItems.Remove(index);
ChangeSource = ChangeSourceEnum.None;
return;
}
((MultiSelectItem)itemContainers[index]).IsSelected = true;
contentPresenter.Children.Add(GeneratePanelItem(Items[index]));
ChangeSource = ChangeSourceEnum.FromSelectedIndices;
SelectedItems.Add(Items[index]);
if (!(SelectedItems is INotifyCollectionChanged))
{
OnSelectedItems_CollectionChanged(this, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, Items[index]));
}
RaiseEvent(new System.Windows.Controls.SelectionChangedEventArgs(SelectionChangedEvent, new object[0], new object[1] {
Items[index]
}));
}
else if (e.Action == NotifyCollectionChangedAction.Remove && ChangeSource != ChangeSourceEnum.FromSelectedItems)
{
int index = (int)e.OldItems[0];
if (index >= Items.Count || index < 0)
{
return;
}
((MultiSelectItem)itemContainers[index]).IsSelected = false;
contentPresenter.Children.RemoveAt(e.OldStartingIndex);
ChangeSource = ChangeSourceEnum.FromSelectedIndices;
var item = SelectedItems[index];
var indexSelectedItems = SelectedItems.IndexOf(item);
SelectedItems.Remove(item);
if (!(SelectedItems is INotifyCollectionChanged))
{
OnSelectedItems_CollectionChanged(this, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, item, indexSelectedItems));
}
RaiseEvent(new System.Windows.Controls.SelectionChangedEventArgs(SelectionChangedEvent, new object[1] {
Items[index]
}, new object[0]));
}
else if (e.Action == NotifyCollectionChangedAction.Reset && ChangeSource != ChangeSourceEnum.FromSelectedItems)
{
foreach (var item in itemContainers)
{
((MultiSelectItem)item).IsSelected = false;
}
contentPresenter.Children.Clear();
ChangeSource = ChangeSourceEnum.FromSelectedIndices;
SelectedItems.Clear();
if (!(SelectedItems is INotifyCollectionChanged))
{
OnSelectedItems_CollectionChanged(this, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
}
RaiseEvent(new System.Windows.Controls.SelectionChangedEventArgs(SelectionChangedEvent, new object[0], new object[0]));
}
ChangeSource = ChangeSourceEnum.None;
}
