construct properti panel state state instanti directli instanti concret subclass param properti panel shown param icon icon shown prop panel state imag icon icon icon deferr event scroll scroll list uml state deferr event list model list entri list uml state entri list uml state entri list model entri list set visibl row count entri scroll scroll pane entri list list exit list uml state exit list uml state exit list model exit list set visibl row count exit scroll scroll pane exit list list intern transit list uml mutabl link list uml state intern transit action transit intern transit scroll scroll pane intern transit list list list uml state activ list uml state activ list model list set visibl row count scroll scroll pane list 