wxPython控件学习之wx.ComboBox
wx.Combobox由一个编辑框和列表组成。它可以显示为带有可编辑或只读文本框的静态列表,也可以显示为带下拉列表的文本区域,或者是不带文本框的下拉列表。一个wx.Combobox只允许单选。wx.Combobox的选择项从0开始编号。如果你需要定制wx.Combobox,可以参照wx.ComboCtrl,wx.OwnerDrawnComboBox,wx.ComboPopup和即将可用的wx.BitmapComBox等控件。
1. Style 样式
wx.CB_SIMPLE 创建一个带列表显示的combobox.只支持windows
wx.CB_DROPDOWN 创建一个带下拉列表的combobox
wx.CB_READONLY 同wx.CB_DROPDOWN,但只有被当做combobox选择项的字符串才能被选定,不在选择列表中的字符串无法将无法填入控件中的文本框。
wx.CB_SORT 列表项按字母序排序
wx.TE_PROCES_ENTER 此样式下控件会产生事件wx.EVT_COMMAND_TEXT_ENTER(否则按下Enter键要么被控件内部处理,要么被用于控件导航)。仅支持windows。
2. 事件
EVT_COMBOBOX(id,func) //当列表中的一个项被选择时,处理wx.EVT_COMMAND_COMBOBOX_SELECTED事件。注意到调用GetValue返回的是选择后的值。
EVT_TEXT(id,func) //当combobox文本改变时,处理wx.EVT_COMMAND_TEXT_UPDATED事件
EVT_TEXT_ENTER(id,func) //当在combobox中按下回车键时,处理wx.EVT_TEXT_ENTER事件。
# -*- coding: UTF-8 -*- #------------------------------------------------------------------------------- # Name: 模块1 # Purpose: # # Author: ankier # # Created: 10/10/2012 # Copyright: (c) ankier 2012 # Licence: <your licence> #------------------------------------------------------------------------------- import wx class ComboBoxFrame(wx.Frame): def __init__(self): wx.Frame.__init__(self, None, -1, 'Combo Box Example', size=(350, 300)) panel = wx.Panel(self, -1) sampleList = ['zero', 'one', 'two', 'three', 'four', 'five','six', 'seven', 'eight'] flexSizer = wx.FlexGridSizer(4,4,6,6) flexSizer.AddGrowableCol(1) flexSizer.AddGrowableCol(3) #定义普通样式的comboBox, 接受键盘输入,但不会改变Item commonLable = wx.StaticText(panel, -1, "普通样式") commonComboBox = wx.ComboBox(panel, -1, value = "zero", choices = sampleList, style = wx.CB_DROPDOWN) #定义简单样式的ComboBox, simpleLable = wx.StaticText(panel, -1, "简单样式:") simpleComboBox = wx.ComboBox(panel, -1, value = "zero", choices = sampleList, style = wx.CB_SIMPLE) #定义只读样式的ComboBox, readonlyLable = wx.StaticText(panel, -1, "只读样式:") readonlyComboBox = wx.ComboBox(panel, -1, value = "zero", choices = sampleList, style = wx.CB_READONLY) #定义二级联动下拉列表 cityDict = {'安徽':["合肥", "淮南"], "江苏":["苏州","南京"]} #定义第一级菜单 proviceLable = wx.StaticText(panel, -1, "省份:") proviceComboBox = wx.ComboBox(panel, -1, value = cityDict.keys()[0], choices = cityDict.keys(), style = wx.CB_READONLY) #定义第二级菜单 cityLable = wx.StaticText(panel, -1, "城市:") cityComboBox = wx.ComboBox(panel, -1, value = cityDict[cityDict.keys()[0]][0], choices = cityDict[cityDict.keys()[0]], style = wx.CB_READONLY) flexSizer.AddMany([ (commonLable, 0, wx.SHAPED|wx.ALIGN_RIGHT), (commonComboBox, 1, wx.EXPAND), (simpleLable, 0, wx.SHAPED|wx.ALIGN_RIGHT),(simpleComboBox, 1, wx.EXPAND) ,(readonlyLable, 0, wx.SHAPED|wx.ALIGN_RIGHT), (readonlyComboBox, 1, wx.EXPAND),(wx.Size(6,6), 0, wx.SHAPED|wx.ALIGN_RIGHT), (wx.Size(6,6), 1, wx.EXPAND) ,(proviceLable, 0, wx.SHAPED|wx.ALIGN_RIGHT), (proviceComboBox, 1, wx.EXPAND),(wx.Size(6,6), 0, wx.SHAPED|wx.ALIGN_RIGHT), (wx.Size(6,6), 1, wx.EXPAND) ,(cityLable, 0, wx.SHAPED|wx.ALIGN_RIGHT), (cityComboBox, 1, wx.EXPAND),(wx.Size(6,6), 0, wx.SHAPED|wx.ALIGN_RIGHT), (wx.Size(6,6), 1, wx.EXPAND) ]) panel.SetSizerAndFit(flexSizer) #定义 一级下拉列表切换时,刷新二级菜单项的响应事件 self.__ProvinceComboBox = proviceComboBox self.__SecityDict = cityDict self.__CityComboBox= cityComboBox panel.Bind(wx.EVT_COMBOBOX, self.__OnComboBoxSelected, proviceComboBox,) 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 main(): app = wx.PySimpleApp() ComboBoxFrame().Show() app.MainLoop() if __name__ == '__main__': main()