"""
OptionMenu widget modified to allow dynamic menu reconfiguration
and setting of highlightthickness
"""
import copy

from tkinter import OptionMenu, _setit, StringVar, Button

class DynOptionMenu(OptionMenu):
 """
 unlike OptionMenu, our kwargs can include highlightthickness
 """
 def __init__(self, master, variable, value, *values, **kwargs):
 # TODO copy value instead of whole dict
 kwargsCopy=copy.copy(kwargs)
 if 'highlightthickness' in list(kwargs.keys()):
 del(kwargs['highlightthickness'])
 OptionMenu.__init__(self, master, variable, value, *values, **kwargs)
 self.config(highlightthickness=kwargsCopy.get('highlightthickness'))
 #self.menu=self['menu']
 self.variable=variable
 self.command=kwargs.get('command')

 def SetMenu(self,valueList,value=None):
 """
 clear and reload the menu with a new set of options.
 valueList - list of new options
 value - initial value to set the optionmenu's menubutton to
 """
 self['menu'].delete(0,'end')
 for item in valueList:
 self['menu'].add_command(label=item,
 command=_setit(self.variable,item,self.command))
 if value:
 self.variable.set(value)

def _dyn_option_menu(parent): # htest #
 from tkinter import Toplevel # + StringVar, Button

 top = Toplevel(parent)
 top.title("Tets dynamic option menu")
 x, y = map(int, parent.geometry().split('+')[1:])
 top.geometry("200x100+%d+%d" % (x + 250, y + 175))
 top.focus_set()

 var = StringVar(top)
 var.set("Old option set") #Set the default value
 dyn = DynOptionMenu(top,var, "old1","old2","old3","old4")
 dyn.pack()

 def update():
 dyn.SetMenu(["new1","new2","new3","new4"], value="new option set")
 button = Button(top, text="Change option set", command=update)
 button.pack()

if __name__ == '__main__':
 from idlelib.idle_test.htest import run
 run(_dyn_option_menu)