public void OrganizeOnDrag(DockItemsControl requestor, Size measureBounds, IEnumerable <DockItem> siblingItems, DockItem dockItem)
{
if (siblingItems == null)
{
throw new ArgumentNullException(nameof(siblingItems));
}
if (dockItem == null)
{
throw new ArgumentNullException(nameof(dockItem));
}
var currentLocations = siblingItems
.Select(GetLocationInfo)
.Union(new[] { GetLocationInfo(dockItem) })
.OrderBy(loc => loc.Item == dockItem ? loc.Start : _siblingItemLocationOnDragStart[loc.Item].Start);
var currentCoord = 0.0;
var zIndex = int.MaxValue;
foreach (var location in currentLocations)
{
if (!Equals(location.Item, dockItem))
{
SendToLocation(location.Item, currentCoord);
location.Item.SetValue(Visual.ZIndexProperty, --zIndex);
}
currentCoord += _getDesiredSize(location.Item) + _itemOffset;
}
dockItem.SetValue(Visual.ZIndexProperty, int.MaxValue);
}
public void OrganizeOnMouseDownWithin(DockItemsControl requestor, Size measureBounds, List <DockItem> siblingItems, DockItem dockItem)
{
var zIndex = int.MaxValue;
foreach (var source in siblingItems.OrderByDescending(x => x.GetValue(Visual.ZIndexProperty)))
{
source.SetValue(Visual.ZIndexProperty, --zIndex);
}
dockItem.SetValue(Visual.ZIndexProperty, int.MaxValue);
}