Fl_Counter02.nim

import fltk_main

proc CounterCB  (self: ptr FL_WIDGET, valuator: pointer) {.cdecl.} =
  echo $Fl_WidgetGetLabel(self) & " value = " & $Fl_ValuatorGetValue(valuator)


var win = Fl_WindowNew(212,112,"Fl_Counter02.nim")
var cnt1 = Fl_CounterNew(10,10,192,24,"counter 1")
var cnt2 = Fl_Simple_CounterNew(10,64,192,24,"counter 2")
Fl_WidgetSetCallbackArg cnt1, CounterCB, cnt1
Fl_WidgetSetCallbackArg cnt2, CounterCB, cnt2
Fl_GroupSetResizable win, win
Fl_WindowShow win
Fl_Run()