private void TrackBarThickness_Scroll(object sender, EventArgs e) { settings.SetPenWidth(TrackBarThickness.Value); PictureBoxThickness.Image = drawingEngine.GetPenImage(); if (_isFigureSelected) { drawingEngine.ChangePenWidth(TrackBarThickness.Value); drawingEngine.SelectFigure(); PictureBoxPaint.Image = drawingEngine.MainImage; } }