protected override void PrepareContainerForItemOverride(DependencyObject element, object item)
{
RemovableItemContentControl control = element as RemovableItemContentControl;
control.ContentTemplate = ItemTemplate;
control.Content = item;
itemsSourceHelper.RegisterItemContainerPair(item, element as FrameworkElement);
int itemIndex = itemsSourceHelper.ItemIndex(item);
if (itemIndex == 0)
{
if (itemsSourceHelper.ItemsCount() > 1)
{
control.Margin = ItemsControlHelper.GetFirstItemMargin(this);
}
else
{
control.Margin = ItemsControlHelper.GetLastItemMargin(this);
}
}
else if (itemsSourceHelper.HasItems() && itemIndex + 1 < itemsSourceHelper.ItemsCount())
{
control.Margin = ItemsControlHelper.GetRegularItemMargin(this);
}
else
{
control.Margin = ItemsControlHelper.GetLastItemMargin(this);
}
if (itemsSourceHelper.GetPreviousContainer(item) is RemovableItemContentControl previous)
{
previous.Margin = ItemsControlHelper.GetRegularItemMargin(this);
}
base.PrepareContainerForItemOverride(element, item);
}
protected override void ClearContainerForItemOverride(DependencyObject element, object item)
{
FrameworkElement previousContainer = itemsSourceHelper.GetPreviousContainer(item);
FrameworkElement nextContainer = itemsSourceHelper.GetNextContainer(item);
if (previousContainer != null)
{
if (nextContainer == null)
{
previousContainer.Margin = ItemsControlHelper.GetLastItemMargin(this);
}
else
{
previousContainer.Margin = ItemsControlHelper.GetRegularItemMargin(this);
}
}
itemsSourceHelper.UnregisterItemContainerPair(item);
base.ClearContainerForItemOverride(element, item);
}
