protected override DependencyObject GetContainerForItemOverride()
{
var visualItem = new AnimatedLayoutControl();
visualItem.RandomGenerator = RandomGenerator;
visualItem.ApplyTemplateCompleted += new EventHandler(visualItem_ApplyTemplateCompleted);
return(visualItem);
}
void ObservableItems_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
foreach (var item in e.NewItems)
{
if (isUnloading)
{
NewRequestedItems.Add(item);
}
else
{
BaseItemsSource.Add(item);
}
}
break;
case NotifyCollectionChangedAction.Reset:
if (!IsVisible)
{
BaseItemsSource.Clear();
VisualItems.Clear();
isUnloading = false;
}
else if (VisualItems.Count > 0)
{
isUnloading = true;
AnimatedLayoutControl lastItem = null;
foreach (var item in VisualItems)
{
if ((lastItem == null) || (item.BeginTime > lastItem.BeginTime))
{
lastItem = item;
}
item.LayoutState = LayoutState.Unloaded;
}
lastItem.LayoutStateChangeCompleted += new EventHandler <LayoutStateChangeEventArgs>(item_LayoutStateChangeCompleted);
}
break;
}
}
private void SetItemIndex()
{
if (NormalizedIndex != null && !Double.IsNaN(NormalizedIndex.Value))
{
return;
}
Panel parentPanel = null;
DependencyObject parentContainer = null;
AnimatedLayoutControl target = this;
GetParentElements(target, ref parentPanel, ref parentContainer);
UIElement child = null;
if (parentContainer != null)
{
child = parentContainer as UIElement;
}
else
{
child = this;
}
if (parentPanel != null)
{
var itemIndex = parentPanel.Children.IndexOf(child);
var itemCount = parentPanel.Children.Count - 1;
if (itemCount == 0)
{
NormalizedIndex = 0;
}
else
{
NormalizedIndex = (Double)itemIndex / (Double)itemCount;
}
}
}