private void AnimateItems(RadVirtualizingDataControlItem item1, double offset1, RadVirtualizingDataControlItem item2, double offset2)
{
this.AnimateScrollOffsetToFocusItem(item2.next == item1 || item2.next == null);
if (this.owner.virtualizationStrategy.LayoutOrientation == Orientation.Vertical)
{
Storyboard.SetTargetProperty(this.da1, "(Canvas.Top)");
Storyboard.SetTarget(this.da1, item1);
Storyboard.SetTargetProperty(this.da2, "(Canvas.Top)");
Storyboard.SetTarget(this.da2, item2);
}
else
{
Storyboard.SetTargetProperty(this.da1, "(Canvas.Left)");
Storyboard.SetTarget(this.da1, item1);
Storyboard.SetTargetProperty(this.da2, "(Canvas.Left)");
Storyboard.SetTarget(this.da2, item2);
}
this.da1.From = item1.CurrentOffset;
this.da1.To = offset1;
this.da2.From = item2.CurrentOffset;
this.da2.To = offset2;
this.sb.Begin();
this.animating = true;
}
internal void ShiftTargetItemUp(bool animate)
{
if (!this.owner.listSource.CanShiftItemIndexUp(this.targetItem.associatedDataItem) || this.animating)
{
return;
}
this.swappedItem = this.targetItem.next;
double nextItemOffset = this.swappedItem.CurrentOffset +
(this.owner.virtualizationStrategy.GetItemLength(this.swappedItem) - this.owner.virtualizationStrategy.GetItemLength(this.targetItem));
RadVirtualizingDataControlItem item1 = this.swappedItem;
RadVirtualizingDataControlItem item2 = this.targetItem;
if (animate)
{
this.AnimateItems(item1, this.targetItem.CurrentOffset, item2, nextItemOffset);
}
else
{
this.owner.virtualizationStrategy.SetItemOffset(this.swappedItem, this.targetItem.CurrentOffset);
this.owner.virtualizationStrategy.SetItemOffset(this.targetItem, nextItemOffset);
}
this.targetItem.next = this.swappedItem.next;
if (this.swappedItem.next != null)
{
this.swappedItem.next.previous = this.targetItem;
}
this.swappedItem.next = this.targetItem;
if (this.targetItem.previous != null)
{
this.targetItem.previous.next = this.swappedItem;
}
this.swappedItem.previous = this.targetItem.previous;
this.targetItem.previous = this.swappedItem;
int itemIndex = this.owner.realizedItems.IndexOf(this.targetItem);
this.owner.realizedItems.RemoveAt(itemIndex);
this.owner.realizedItems.Insert(itemIndex + 1, this.targetItem);
this.owner.firstItemCache = this.owner.realizedItems[0];
this.owner.lastItemCache = this.owner.realizedItems[this.owner.realizedItems.Count - 1];
this.owner.listSource.ShiftItemIndexUp(this.targetItem.associatedDataItem);
this.EvaluateButtonsAvailability();
}
protected override void ClearContainerForItemOverride(RadVirtualizingDataControlItem element, Telerik.Windows.Data.IDataSourceItem item)
{
base.ClearContainerForItemOverride(element, item);
element.ContentTemplate = null;
}
protected override void ClearContainerForItemOverride(RadVirtualizingDataControlItem element, Telerik.Windows.Data.IDataSourceItem item)
{
base.ClearContainerForItemOverride(element, item);
element.ContentTemplate = null;
}
