mingw/lib/tk8.5/optMenu.tcl

   1 # optMenu.tcl --
   2 #
   3 # This file defines the procedure tk_optionMenu, which creates
   4 # an option button and its associated menu.
   5 #
   6 # Copyright (c) 1994 The Regents of the University of California.
   7 # Copyright (c) 1994 Sun Microsystems, Inc.
   8 #
   9 # See the file "license.terms" for information on usage and redistribution
  10 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  11 #
  12
  13 # ::tk_optionMenu --
  14 # This procedure creates an option button named $w and an associated
  15 # menu.  Together they provide the functionality of Motif option menus:
  16 # they can be used to select one of many values, and the current value
  17 # appears in the global variable varName, as well as in the text of
  18 # the option menubutton.  The name of the menu is returned as the
  19 # procedure's result, so that the caller can use it to change configuration
  20 # options on the menu or otherwise manipulate it.
  21 #
  22 # Arguments:
  23 # w -                   The name to use for the menubutton.
  24 # varName -             Global variable to hold the currently selected value.
  25 # firstValue -          First of legal values for option (must be >= 1).
  26 # args -                Any number of additional values.
  27
  28 proc ::tk_optionMenu {w varName firstValue args} {
  29     upvar #0 $varName var
  30
  31     if {![info exists var]} {
  32         set var $firstValue
  33     }
  34     menubutton $w -textvariable $varName -indicatoron 1 -menu $w.menu \
  35             -relief raised -highlightthickness 1 -anchor c \
  36             -direction flush
  37     menu $w.menu -tearoff 0
  38     $w.menu add radiobutton -label $firstValue -variable $varName
  39     foreach i $args {
  40         $w.menu add radiobutton -label $i -variable $varName
  41     }
  42     return $w.menu
  43 }