public void Update()
{
var selectedItems = GetSelectedItems(this.ListView);
if (selectedItems != null)
{
foreach (var selectedItem in selectedItems)
{
var listViewItem = this.ListView.ItemContainerGenerator.ContainerFromItem(selectedItem) as ListViewItem;
if (listViewItem != null)
{
if (!ListViewItemExtensions.GetIsDragging(listViewItem))
{
ListViewItemExtensions.SetIsDragging(listViewItem, true);
}
}
this.Items.Add(selectedItem);
}
}
for (var position = this.Items.Count - 1; position >= 0; position--)
{
var draggingItem = this.Items[position];
if (selectedItems == null || !selectedItems.Contains(draggingItem))
{
var listViewItem = this.ListView.ItemContainerGenerator.ContainerFromItem(draggingItem) as ListViewItem;
if (listViewItem != null)
{
ListViewItemExtensions.SetIsDragging(listViewItem, false);
}
this.Items.RemoveAt(position);
}
}
}
public void Clear()
{
foreach (var draggingItem in this.Items)
{
var listViewItem = this.ListView.ItemContainerGenerator.ContainerFromItem(draggingItem) as ListViewItem;
if (listViewItem != null)
{
ListViewItemExtensions.SetIsDragging(listViewItem, false);
}
}
this.Items.Clear();
}