protected override IVirtualizedElement <ListViewDataItem> UpdateElement(int position, ListViewDataItem data)
{
IVirtualizedElement <ListViewDataItem> element = null;
object elementContext = this.GetElementContext();
if (position < this.Children.Count)
{
element = (IVirtualizedElement <ListViewDataItem>) this.Children[position];
if (ElementProvider.ShouldUpdate(element, data, elementContext))
{
if (position < this.Children.Count - 1)
{
IVirtualizedElement <ListViewDataItem> nextElement = (IVirtualizedElement <ListViewDataItem>) this.Children[position + 1];
if (nextElement.Data.Equals(data))
{
this.Children.Move(position + 1, position);
nextElement.Synchronize();
return(nextElement);
}
}
if (ElementProvider.IsCompatible(element, data, elementContext))
{
element.Detach();
element.Attach(data, elementContext);
}
else
{
int index = FindCompatibleElement(position, data);
if (index > position)
{
this.Children.Move(index, position);
element = (IVirtualizedElement <ListViewDataItem>) this.Children[position];
element.Detach();
element.Attach(data, elementContext);
}
else
{
position = Math.Min(position, this.Children.Count);
element = ElementProvider.GetElement(data, elementContext);
InsertElement(position, element, data);
}
}
}
}
else
{
position = Math.Min(position, this.Children.Count);
element = ElementProvider.GetElement(data, elementContext);
InsertElement(position, element, data);
}
return(element);
}
protected override IVirtualizedElement <RadListDataItem> UpdateElement(
int position,
RadListDataItem data)
{
object elementContext = this.GetElementContext();
IVirtualizedElement <RadListDataItem> element;
if (position < this.Children.Count)
{
element = (IVirtualizedElement <RadListDataItem>) this.Children[position];
if (this.ElementProvider.ShouldUpdate(element, data, elementContext))
{
if (position < this.Children.Count - 1)
{
IVirtualizedElement <RadListDataItem> child = (IVirtualizedElement <RadListDataItem>) this.Children[position + 1];
if (child.Data.Equals((object)data))
{
this.Children.Move(position + 1, position);
child.Synchronize();
return(child);
}
}
if (this.ElementProvider.IsCompatible(element, data, elementContext))
{
element.Detach();
element.Attach(data, elementContext);
}
else
{
int compatibleElement = this.FindCompatibleElement(position, data);
if (compatibleElement > position)
{
this.Children.Move(compatibleElement, position);
element = (IVirtualizedElement <RadListDataItem>) this.Children[position];
element.Detach();
element.Attach(data, elementContext);
}
else
{
position = Math.Min(position, this.Children.Count);
element = this.ElementProvider.GetElement(data, elementContext);
this.InsertElement(position, element, data);
}
}
}
}
else
{
position = Math.Min(position, this.Children.Count);
element = this.ElementProvider.GetElement(data, elementContext);
this.InsertElement(position, element, data);
}
return(element);
}