Hello!

How do I do this? I've used all of the functions like Auto, Skip, etc from the control panel attached to the dialogue (or any other) printer with my customized UI buttons. But now I need a button that makes a one-step-back rewind just as when you scroll a mouse wheel up. I know how to setup Input to call a Rollback form a keyboard or a joystick. But right now I need the function to start by pressing a UI button. Is there a way to do it?

You can use RollbackAsync via IStateManager, however you need to specify a suitable playback spot to rollback to; eg, to rollback to the previous spot which allows player rollback (similar to what happens when activating rollback input), use:

stateManager.RollbackAsync(s => s.PlayerRollbackAllowed);

Thank you very much! I took one of the functions as an example and created the following function:

namespace Naninovel.UI
{
public class ButtonRollback : ScriptableButton
{
private IStateManager stateManager;

    protected override void Awake ()
    {
        base.Awake();

        stateManager = Engine.GetService<IStateManager>();
    }

    protected override void OnButtonClick () => RollbackAsync();

    private async void RollbackAsync ()
    {
        UIComponent.interactable = false;
        await stateManager.RollbackAsync(s => s.PlayerRollbackAllowed);
        UIComponent.interactable = true;           
    }

}
}

Then I just dragged this function to my UI button. Works great!