/// <summary>
/// Handles when the selected objects have changed.
/// </summary>
void UpdateSelection()
{
// Notify that the collection has changed
ChangeSelected();
if (SelectedChanged != null)
{
SelectedChanged.Raise(this, EventArgs.Empty);
}
// Ensure the focused object is valid
if (Focused == null || !_selectedObjs.Contains(Focused))
{
Focused = _selectedObjs.FirstOrDefault();
}
}
