void ImpressionistUI::cb_paintlyMinStrokeLengthSlider(Fl_Widget* o, void* v) { ImpressionistUI* pUI = ((ImpressionistUI *)(o->user_data())); ImpressionistDoc* pDoc = pUI->getDocument(); int val = int(((Fl_Slider *)o)->value()); pDoc->setPaintlyMinStroke(val); }