An options UI element is like a list where you can choose an option from it. In SUI it's declared as SOptions.

We can add it to a panel or container as usual and we need to use the .Options method to specify the list of available options (passing an array of strings):

static string[] options = { "Option 1", "Option 2", "Option 3" };

public static void Create()
{
    var panel = RegisterNewPanel("panel id", true).Anchor(AnchorType.MiddleCenter).Background(Color.blue, EBackground.RoundedStandard).Size(1280, 720);
    var container = SContainer.Background(Color.green).Anchor(AnchorType.Fill)
                        - SOptions.Text("Options").Options(options);

    panel.Add(container);
}
            

We can also do something when the selected option is changed using the .Notify method like so:

static string[] options = { "Option 1", "Option 2", "Option 3" };

public static void Create()
{
    var panel = RegisterNewPanel("panel id", true).Anchor(AnchorType.MiddleCenter).Background(Color.blue, EBackground.RoundedStandard).Size(1280, 720);
    var container = SContainer.Background(Color.green).Anchor(AnchorType.Fill)
                        - SOptions.Text("Options").Options(options).Notify(PrintOption); // passing the option index of the "options" array when changing the selection

    panel.Add(container);
}

private static void PrintOption(int index) // receiving the index of the last selected option
{
    switch (index)
    {
        case 0:
            RLog.Msg("Option 1 selected");
            break;
        case 1:
            RLog.Msg("Option 2 selected");
            break;
        case 2:
            RLog.Msg("Option 3 selected");
            break;
    }
}