我有一个与我的程序TixExFileSelectDialog中的几个Entry对象相关联的；该对话框是动态配置的，以便所选文件与Entry正在使用的对话框中的文本匹配。但是，第一次打开对话框时，无论使用哪个Entry，它都只显示模式字符串，即使Entry已经有默认值。但是，如果我取消对话框然后重新打开它，它会显示正确的字符串。当我设置组合框selection和value选项（一个、另一个和两者）的任意组合以及将组合框的variable选项设置为StringVar. 我TixComboBox的功能有什么遗漏吗？
我目前正在使用的代码（带有一些重新格式化/等用于发布）：
from tkinter.tix import *
opts = {'path': 'C:\\'}
class ImportGUI(Frame):
def _setfsd(self, directory='', pattern='*.xls', variable='', selection=None):
"Reconfigures the ExFileSelectDialog to enable reusability."
self.fsd.fsbox.config(directory=directory or opts['path'], # can't use opts['path'] as a default argument, because it could change.
pattern=pattern)
self.fsd.fsbox.file['variable'] = variable
if not variable:
self.fsd.fsbox.file['value'] = selection or pattern # Defaults to the pattern, which is the behavior of a fresh ExFileSelectionBox.
elif selection is not None: # variable exists, but setting selection manually as well
self.fsd.fsbox.file['value'] = selection
def _selectdatafile(self):
self._setfsd(selection='apple1.xls')
self.fsd.popup()
def _selectcodefile(self):
self._setfsd(selection='apple2.xls')
self.fsd.popup()
def createWidgets(self):
self.fsd = ExFileSelectDialog(self.master) # a top-level widget, so giving it the default root as master
self.dfrow = Frame(self)
self.cfrow = Frame(self)
self.dfentry = Entry(self.dfrow)
self.dfentry.pack(side='left')
self.cfentry = Entry(self.cfrow)
self.cfentry.pack(side='left')
self.dfbtn = Button(self.dfrow, text='...', command=self._selectdatafile)
self.dfbtn.pack(side='left')
self.cfbtn = Button(self.cfrow, text='...', command=self._selectcodefile)
self.cfbtn.pack(side='left')
self.dfrow.pack()
self.cfrow.pack()
self.pack()
def __init__(self, master=None):
Frame.__init__(self, master)
self.master.tk.eval('package require Tix')
self.createWidgets()
if __name__ == '__main__': # for testing
gui = ImportGUI()
gui.mainloop()