public static void CopySelected(this ISelectionService selectionService)
{
if (selectionService == null)
{
throw new ArgumentNullException(nameof(selectionService));
}
//Get the selected elements
var elements = selectionService.GetSelected()
.OfType <IElement>();
ClipboardUtility.Copy(elements);
}
private static void ShiftSelect(this ISelectionService selectionService, ISelectable selectable)
{
var siblings = selectable.GetSiblings();
//See if there are any non sibinglings that need to be
var nonSiblingSelected = selectionService.GetSelected()
.Where(s => !siblings.Contains(s))
.ToArray();
foreach (var toUnselect in nonSiblingSelected)
{
selectionService.Unselect(toUnselect);
}
//Now, only existing siblings should be selected
var selected = selectionService.GetSelected();
//If there are none selected, then select all of the sibings up to this one
if (!selected.Any())
{
foreach (var sibling in siblings)
{
selectionService.Select(sibling);
if (sibling == selectable)
{
break;
}
}
}
else
{
//Do a range selection
selectionService.SelectBetween(siblings, selectable, selected.LastOrDefault());
}
}
public static void DragSelected(this ISelectionService selectionService, DependencyObject dragSource)
{
if (selectionService == null)
{
throw new ArgumentNullException(nameof(selectionService));
}
var selected = selectionService.GetSelected();
//Make sure we have something to work with
if (selected.Length == 0)
{
return;
}
var elements = selected.OfType <IElement>()
.ToArray();
//Make sure that these are all elements
if (elements.Length != selected.Length)
{
return;
}
//Serialize for the clipboard
var momento = new ElementClipboardData(elements);
//Perform the operation
var result = DragDrop.DoDragDrop(dragSource, momento, DragDropEffects.Copy | DragDropEffects.Move);
if ((result & DragDropEffects.Move) == DragDropEffects.Move)
{
//Unselect these - they're going away.
selectionService.SelectNone();
//Remove the originals from their spots
foreach (var element in elements)
{
//Remove the element from where it came from
element.Parent?.RemoveElement(element);
}
}
}
protected IEnumerable <IDeleteable> GetSelectedDeleteables() => _selectionService.GetSelected().OfType <IDeleteable>();
