public override void Draw()
{
var options = Variants.Select(t => t.Name).ToList();
if (CanNullable)
{
options.Insert(0, "null");
}
if (!options.Any())
{
throw new InvalidDataException("options for select in dropdown not contains any element");
}
var index = Variants.FindIndex(t => t.Value.Equals(Selected));
var current_selected = Selected == null ? 0 : index == -1 ? 0 : index + (CanNullable ? 1 : 0);
int new_selection;
if (Label == null)
{
new_selection = EditorGUILayout.Popup(current_selected, options.ToArray(), LayoutOptions);
}
else
{
new_selection = EditorGUILayout.Popup(new GUIContent(Label), current_selected,
options.Select(t => new GUIContent(t)).ToArray(), LayoutOptions);
}
if (current_selected == new_selection)
{
return;
}
var variantValue = Variants.FirstOrDefault(t => t.Name == options[new_selection]);
var newSelected = variantValue == null ? default(T) : variantValue.Value;
EventChange?.Invoke(newSelected);
Selected = newSelected;
}
