/// <summary>
/// Move an item in the rendered layout.
/// </summary>
/// <param name="moveItemRequest"></param>
public void MoveItem(MoveItemRequest moveItemRequest)
{
if (moveItemRequest == null)
{
throw new ArgumentNullException(nameof(moveItemRequest));
}
if (ItemsOrganiser == null)
{
return;
}
var dragablzItem = moveItemRequest.Item as DragablzItem ??
ItemContainerGenerator.ContainerFromItem(
moveItemRequest.Item) as DragablzItem;
var contextDragablzItem = moveItemRequest.Context as DragablzItem ??
ItemContainerGenerator.ContainerFromItem(
moveItemRequest.Context) as DragablzItem;
if (dragablzItem == null)
{
return;
}
var sortedItems = DragablzItems( ).OrderBy(di => di.LogicalIndex).ToList( );
sortedItems.Remove(dragablzItem);
switch (moveItemRequest.AddLocationHint)
{
case AddLocationHint.First:
sortedItems.Insert(0, dragablzItem);
break;
case AddLocationHint.Last:
sortedItems.Add(dragablzItem);
break;
case AddLocationHint.Prior:
case AddLocationHint.After:
if (contextDragablzItem == null)
{
return;
}
var contextIndex = sortedItems.IndexOf(contextDragablzItem);
sortedItems.Insert(moveItemRequest.AddLocationHint == AddLocationHint.Prior ? contextIndex : contextIndex + 1, dragablzItem);
break;
default:
throw new ArgumentOutOfRangeException(nameof(AddLocationHint));
}
//TODO might not be too great for perf on larger lists
var orderedEnumerable = sortedItems.OrderBy(di => sortedItems.IndexOf(di));
ItemsOrganiser.Organise(this, new Size(ItemsPresenterWidth, ItemsPresenterHeight), orderedEnumerable);
}
internal void MoveItem(MoveItemRequest moveItemRequest)
{
if (moveItemRequest == null) throw new ArgumentNullException("moveItemRequest");
if (ItemsOrganiser == null) return;
var dragablzItem = moveItemRequest.Item as DragablzItem ??
ItemContainerGenerator.ContainerFromItem(
moveItemRequest.Item) as DragablzItem;
var contextDragablzItem = moveItemRequest.Context as DragablzItem ??
ItemContainerGenerator.ContainerFromItem(
moveItemRequest.Context) as DragablzItem;
if (dragablzItem == null) return;
var sortedItems = DragablzItems().OrderBy(di => di.LogicalIndex).ToList();
sortedItems.Remove(dragablzItem);
switch (moveItemRequest.AddLocationHint)
{
case AddLocationHint.First:
sortedItems.Insert(0, dragablzItem);
break;
case AddLocationHint.Last:
sortedItems.Add(dragablzItem);
break;
case AddLocationHint.Prior:
case AddLocationHint.After:
if (contextDragablzItem == null)
return;
var contextIndex = sortedItems.IndexOf(contextDragablzItem);
sortedItems.Insert(moveItemRequest.AddLocationHint == AddLocationHint.Prior ? contextIndex : contextIndex + 1, dragablzItem);
break;
default:
throw new ArgumentOutOfRangeException();
}
//TODO might not be too great for perf on larger lists
var orderedEnumerable = sortedItems.OrderBy(di => sortedItems.IndexOf(di));
ItemsOrganiser.Organise(this, new Size(ItemsPresenterWidth, ItemsPresenterHeight), orderedEnumerable);
}