用python实现省市县多级嵌套下拉列表

# -*- coding: UTF-8 -*-


import wx
class ComboBoxFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, -1, 'Combo Box Example', size=(1300, 750))
        panel = wx.Panel(self, -1)

        dict1 = {
                    u'甘肃': [u'张掖', u'武威'],
                    u'江苏': [u'南通', u'南京']
                }
        dict2 = {
                    u'张掖': [u'高台', u'肃南'],
                    u'武威': [u'古浪', u'民勤'],
                    u'南通': [u'海门县', u'海安县'],
                    u'南京': [u'玄武区', u'朱雀区']
                }

        proviceLable = wx.StaticText(panel, -1, "省份:", pos=(80, 60))  # 省份的静态说明文本框
        proviceComboBox = wx.ComboBox(panel, -1, value=list(dict1.keys())[0], choices=list(dict1.keys()),
                                      style=wx.CB_READONLY, pos=(170, 55))  # 省份的下拉文本框


        cityLable = wx.StaticText(panel, -1, "市区:", pos=(80, 120))  # 市区～
        shiquComboBox = wx.ComboBox(panel, -1, value=dict1[list(dict1.keys())[0]][0],
                                    choices=dict1[list(dict1.keys())[0]], style=wx.CB_READONLY, pos=(170, 115))  # 市区～


        value1 = dict1[list(dict1.keys())[0]][0]  # 这个变量用于得到省份字典的第一个key值所对应的value值，主要用于对县级下拉列表的初始化
        xianquLable = wx.StaticText(panel, -1, "县区:", pos=(80,180))  # 县区～
        xianquComboBox = wx.ComboBox(panel, -1, value=dict2[value1][0],
                                     choices=dict2[value1], style=wx.CB_READONLY, pos=(170, 175))  # 县区～

        # 定义一级列表被点击时响应二级列表和三级列表的刷新事件
        self.__ProvinceComboBox = proviceComboBox
        self.__SecityDict = dict1
        self.__CityComboBox = shiquComboBox
        panel.Bind(wx.EVT_COMBOBOX, self.__OnComboBoxSelected1, proviceComboBox, )
        # 定义二级列表被点击时响应三级列表的刷新事件
        self.__SecityDict1 = dict2
        self._XianquCombobox = xianquComboBox
        panel.Bind(wx.EVT_COMBOBOX, self.__OnComboBoxSelected2, shiquComboBox, )
        # 定义三级列表被点击时响应的事件
        panel.Bind(wx.EVT_COMBOBOX, self.__OnComboBoxSelected3, xianquComboBox, )



    def __OnComboBoxSelected(self, event):
        currentProvinceIndex = self.__ProvinceComboBox.GetSelection()
        if wx.NOT_FOUND == currentProvinceIndex: return
        value = self.__ProvinceComboBox.GetItems()[currentProvinceIndex]

        # 注意中文在List dict 等存储时候, utf-8 格式不一致问题
        value = value.encode('utf-8')
        cityList = self.__SecityDict[value]
        self.__CityComboBox.SetItems(cityList)
        self.__CityComboBox.SetValue(cityList[0])

    def __OnComboBoxSelected1(self, event):  # 省份列表点击的响应函数
        currentProvinceIndex1 = self.__ProvinceComboBox.GetSelection()
        print currentProvinceIndex1
        if wx.NOT_FOUND == currentProvinceIndex1: return
        value1 = self.__ProvinceComboBox.GetItems()[currentProvinceIndex1]
        print self.__SecityDict[value1]
        cityList = self.__SecityDict[value1]

        self.__CityComboBox.SetItems(cityList)
        self.__CityComboBox.SetValue(cityList[0])
        self.__OnComboBoxSelected2(self)

    def __OnComboBoxSelected2(self, event):  # 市区列表点击的响应函数
        currentShiquIndex = self.__CityComboBox.GetSelection()
        if wx.NOT_FOUND == currentShiquIndex: return
        value = self.__CityComboBox.GetItems()[currentShiquIndex]
        cityList = self.__SecityDict1[value]
        self._XianquCombobox.SetItems(cityList)
        self._XianquCombobox.SetValue(cityList[0])

    def __OnComboBoxSelected3(self, event):  # 响应县区下拉文本框点击的响应函数
        currentXianquIndex = self._XianquCombobox.GetSelection()
        value = self._XianquCombobox.GetItems()[currentXianquIndex]
        self._cityname = value







def main():
    app = wx.PySimpleApp()
    ComboBoxFrame().Show()
    app.MainLoop()


if __name__ == '__main__':
    main()