public void RegisterDropTarget(IDropTarget dropTarget)
{
if (!DropTargets.Contains(dropTarget))
{
DropTargets.Add(dropTarget);
}
}
public void RemoveDropTarget(IDropTarget dropTarget)
{
if (!DropTargets.Contains(dropTarget))
{
throw new Exception("Элемент не найден");
}
DropTargets.Remove(dropTarget);
}
public void RegisterDropTarget(IDropTarget dropTarget, params string[] allowedDropGroupNames)
{
if (!DropTargets.Contains(dropTarget))
{
DropTargets.Add(dropTarget);
}
foreach (var item in allowedDropGroupNames)
{
dropTarget.AllowedDropGroupNames.Add(item);
}
}
private IDropTarget FindParentAllowedTarget(IDropTarget dropTarget)
{
DependencyObject parent = dropTarget.Instanse.Parent;
while (parent != null)
{
var parentDropTarget = parent as IDropTarget;
if ((parentDropTarget != null) && DropTargets.Contains(parentDropTarget) &&
IsAcceptableTarget(parentDropTarget))
{
return(parentDropTarget);
}
parent = VisualTreeHelper.GetParent(parent);
}
return(null);
}