private void UpdateSelectedItems()
{
for (int i = _selectedItems.Count - 1; i >= 0; i--)
{
DockItem item = _selectedItems[i];
if (!_visibleItems.Contains(item))
{
_selectedItems.Remove(item);
}
}
}
private IEnumerable <DockItem> GetActiveItems()
{
foreach (DockItem item in _items)
{
if (_visibleItems.Contains(item) && !_selectedItems.Contains(item))
{
yield return(item);
}
}
foreach (DockItem item in _selectedItems)
{
Debug.Assert(_visibleItems.Contains(item));
yield return(item);
}
}