private void GroupItems(ArrayList items)
{
var castedItems = items.OfType <FolderItemViewModel>().ToArray();
var fromDate = castedItems.Min(x => x.FromDate);
var toDate = castedItems.Max(x => x.ToDate);
var newFolder = Folder.AddFolder("", fromDate, toDate);
foreach (var item in castedItems)
{
item._item.Move(Folder, newFolder);
Items.Remove(item);
}
var newFolderVm = new FolderItemViewModel(newFolder);
Items.Add(newFolderVm);
}
public void Rename(FolderItemViewModel item, string newName)
{
Folder.RenameItem(item._item, newName);
item.RaisePropertyChanged(() => Name);
}