public override void OnGUI()
        {
            if (_ScenarioWindow != null && _ScenarioWindow.Visible)
            {
                _LoadBtn.IsEnabled = _SelectedScenario != null;
                _ScenarioWindow.Draw();
            }

            if (_IsLoading)
            {
                UnityEngine.GUI.Box(new Rect(0, 0, Screen.width, Screen.height), "Loading Scenario, Please wait...", _LoadingStyle);
            }
        }