;*********************************************************************************
FUNCTION cw_fourparameter_get_value, id
      widget_control, widget_info(id, find_by_uname = 'glo'), get_value = glo
      widget_control, widget_info(id, find_by_uname = 'used'), get_value = used
      widget_control, widget_info(id, find_by_uname = 'min'), get_value = min
      widget_control, widget_info(id, find_by_uname = 'max'), get_value = max
   return, fix([glo[0], used[0], min[0], max[0]])
end
;*********************************************************************************
FUNCTION cw_fourparameter_event, event
   widget_control, event.id, get_uvalue=uval
   value = cw_fourparameter_get_value(event.handler)
   case uval of
      'glo':
      'used':BEGIN
         widget_control, event.id, get_value = used 
         value[1] = fix(used[0])
         if value[1] GT value[0] then begin
            value[1] = value[0]
            widget_control, event.id, set_value = strtrim(value[1], 1)
            value[2] = 0
            widget_control, widget_info(event.handler, find_by_uname = 'min'), set_value = strtrim(value[2], 1)
            value[3] = value[0]-1
            widget_control, widget_info(event.handler, find_by_uname = 'max'),set_value=strtrim(value[3], 1)
         ENDIF
         if value[1] GT value[3]-value[2] then begin
            value[2] = 0
            widget_control, widget_info(event.handler, find_by_uname = 'min'), set_value = strtrim(value[2], 1)
            value[3] = value[1]-1
            widget_control, widget_info(event.handler, find_by_uname = 'max'),set_value=strtrim(value[3], 1)
         ENDIF
      END
      'min':BEGIN 
         widget_control, event.id, get_value = minv 
         value[2] = 0 > fix(minv[0]) < (value[3]-1)
         widget_control, event.id, set_value = strtrim(value[2], 1)
         value[1] = fix(value[3]-value[2]+1)
         widget_control, widget_info(event.handler, find_by_uname = 'used'), set_value = strtrim(value[1], 1)
      END
      'max':BEGIN
         widget_control, event.id, get_value = maxv 
         value[3] = (value[2]+1) > fix(maxv[0]) < (value[0]-1)
         widget_control, event.id, set_value = strtrim(value[3], 1)
         value[1] = fix(value[3]-value[2]+1)
         widget_control, widget_info(event.handler, find_by_uname = 'used'), set_value = strtrim(value[1], 1)
      END
   endcase
   return, {ID:event.handler, TOP:event.top, HANDLER:0L $
            , VALUE:value}
end
;*********************************************************************************
FUNCTION cw_fourparameter,  parent, xgloin, xin, xminin, xmaxin, direction, type, CLEAR = clear, EDITABLE = editable, UVALUE = uvalue, UNAME = uname
;
@common
;
   xglo = xgloin
   x = xin
   xmin = xminin
   xmax = xmaxin
;
   if keyword_set(clear)  then begin
      x = 0
      xmin = 0
      xmax = 0
   ENDIF
;   
   if NOT keyword_set(uvalue) then uvalue = ''
   if NOT keyword_set(uname) then uname = ''
    base = widget_base(parent, /column, UVALUE = uvalue, UNAME = uname $
                      , EVENT_FUNC = 'cw_fourparameter_event' $
                      , FUNC_GET_VALUE='cw_fourparameter_get_value' $
                      , PRO_SET_VALUE='cw_fourparameter_set_value' )
;
;     case type of
;        'mesh':nothing = widget_label(base, value = 'parametres de position de la grille par rapport')
;        'dta':nothing = widget_label(base, value = 'parametres de position des donnees par rapport')
;     endcase
;     nothing = widget_label(base, value = 'au domaine de calcul suivant '+direction)
    baserow = widget_base(base, /row)
    case direction of
       'x':letter = 'i'
       'y':letter = 'j'
       'z':letter = 'k'
    ENDCASE
    case type of
       'mesh':used = ''
       'dta':used = 'dta'
    endcase
;
    nothing = widget_label(baserow, value = 'jp'+letter+'glo')
    nothing = widget_text(baserow, value = strtrim(xglo, 1), uname = 'glo', uvalue = 'glo', xsize = 4, EDITABLE = editable)

    nothing = widget_label(baserow, value = 'jp'+letter+used)
    nothing = widget_text(baserow, value = strtrim(x, 1), uname = 'used', uvalue = 'used', xsize = 4, EDITABLE = editable)

    nothing = widget_label(baserow, value = 'i'+direction+'min'+type)
    rien = execute('value = strtrim(i'+direction+'min'+type+'*(1-keyword_set(editable)), 1)')
    nothing = widget_text(baserow, value = strtrim(xmin, 1), uname = 'min', uvalue = 'min', xsize = 4, EDITABLE = editable)

    nothing = widget_label(baserow, value = 'i'+direction+'max'+type)
    nothing = widget_text(baserow, value = strtrim(xmax, 1), uname = 'max', uvalue = 'max', xsize = 4, EDITABLE = editable)


   return, base
end