private void PopulateToolbar() { var resetGraph = UiElements.GetButton("Reset Graph"); resetGraph.SetAlignment(Style.GetButtonCoreStyle().Alignment); resetGraph.EventMouseClick += (sender, args) => { if (_presenter.IsGraphGenerated()) { _presenter.ResetGraph(); _presenter.SaveGraph(); } else { ShowPopUp("Generate graph first"); } }; _toolbar.AddItems(resetGraph); }