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#! /usr/bin/python

# -*- coding: utf8 -*-

from Tkinter import *

class Select(Frame):

    def __init__(self,   master=None):

        Frame.__init__(self,   master)

        self.label = Label(self,   text="選擇項(xiàng)目")

        self.listBox = Listbox(self,   height=1)

        self.button = Button(self,   text='V', command=self.triggle)

        self.hideList = True

        for i in xrange(10):

            self.listBox.insert(i, 'Item%d'%i)

        self.label.grid(row=0,   column=0, sticky=N)

        self.listBox.grid(row=0,   column=1, sticky=N)

        self.button.grid(row=0,   column=2, sticky=N)

        self.grid()

    def triggle(self):

        self.hideList   ^= 1

        self.listBox.config(height=[self.listBox.size(), 1][self.hideList])

app = Select()

app.mainloop()