;*********************************************************************
PRO whichread_event, event
;
@common
;
   if tag_names(event, /structure_name) NE 'WIDGET_BUTTON' then return
   widget_control, event.id,  get_uvalue = uvalue
   widget_control, event.handler, get_uvalue = messenger
   case uvalue of
      'Cancel':*messenger = -1
      'ok finish':BEGIN
         widget_control, widget_info(event.handler, find_by_uname = 'funclec_name') $
          , get_value = answer
         funclec_name = strtrim(answer[0], 2)
         widget_control, widget_info(event.handler, find_by_uname = 'xdta'), get_value = answer
         jpiglo = long(answer[0])
         jpidta = long(answer[1])
         ixmindta = long(answer[2])
         ixmaxdta = long(answer[3])
         widget_control, widget_info(event.handler, find_by_uname = 'ydta'), get_value = answer
         jpjglo = long(answer[0])
         jpjdta = long(answer[1])
         iymindta = long(answer[2])
         iymaxdta = long(answer[3])
         widget_control, widget_info(event.handler, find_by_uname = 'zdta'), get_value = answer
         jpkglo = long(answer[0])
         jpkdta = long(answer[1])
         izmindta = long(answer[2])
         izmaxdta = long(answer[3])
;
;
         *messenger = {funclec_name:funclec_name $
                       , jpidta:jpidta, jpjdta:jpjdta, jpkdta:jpkdta $
                       , ixmindta:ixmindta, ixmaxdta:ixmaxdta $
                       , iymindta:iymindta, iymaxdta:iymaxdta $
                       , izmindta:izmindta, izmaxdta:izmaxdta $
                      }
      END
   endcase
   widget_control,event.handler,/destroy
;
   return
end
;*********************************************************************
FUNCTION whichread, FUNCLEC_NAME = funclec_name, PARENT = parent, _EXTRA = ex
;
@common
;
; pour recuperer les reponses possees lors de l''utilisation de ce
; widget on cree un pointeur que l''on place dans la uvalue. Comme ca
; une fois que le widget est detruit dans la procedure ...event.pro,
; la variable surlaquelle pointait le pointeur (contenue ds la uvalue
; du widget) n''est pas detruite est on peut recuperer le resultat!
;
   messenger = ptr_new(/allocate_heap)
;
;
   if keyword_set(parent) then BEGIN
   base=widget_base(parent, /COLUMN, title = 'whichread', /align_center, uvalue = messenger, _EXTRA = ex)
   ENDIF ELSE BEGIN 
      base=widget_base(/COLUMN, title = 'whichread', /align_center, uvalue = messenger, _EXTRA = ex)
      nothing = widget_button(base, value = 'Cancel', uvalue = 'Cancel')
   ENDELSE
;
   basea=widget_base(base, /row, /align_center)
   nothing = widget_label(basea, value = 'Read Function name:')
   if NOT keyword_set(funclec_name) then funclec_name = 'read_ncdf'
   nothing = widget_text(basea, value = funclec_name, uname = 'funclec_name', xsize = 10, /EDITABLE)
   nothing = cw_fourparameter(base, jpiglo, jpidta, ixmindta, ixmaxdta, 'x', 'dta', /EDITABLE, uname = 'xdta')
   nothing = cw_fourparameter(base, jpjglo, jpjdta, iymindta, iymaxdta, 'y', 'dta', /EDITABLE, uname = 'ydta')
   nothing = cw_fourparameter(base, jpkglo, jpkdta, izmindta, izmaxdta, 'z', 'dta', /EDITABLE, uname = 'zdta')
   nothing = widget_button(base, value = 'Ok, Get the Read parameters!', uvalue = 'ok finish')
;
   widget_control,base,/realize
   xmanager,'whichread', base,event_handler = 'whichread_event'
   res = *messenger
   ptr_free, messenger

   return, res
;   
end