如何使用tkFileDialog.askdirectory的输出来填充tkinter Entry框

Question

我有一个tkinter Entry框,用户可以在其中插入目录的路径.或者,用户可以单击按钮以选择目录.如何设置按钮的输出以填充"输入"框？我尝试了以下但dirname不是全局变量,因此无法识别UserFileInput.另外如何绑定输入字段旁边的按钮.

from Tkinter import *
import tkFileDialog

def askdirectory():
  dirname = tkFileDialog.askdirectory()
  return dirname

def UserFileInput(status,name):
  optionFrame = Frame(root)
  optionLabel = Label(optionFrame)
  optionLabel["text"] = name
  optionLabel.pack(side=LEFT)
  text = str(dirname) if dirname else status
  var = StringVar(root)
  var.set(text)
  w = Entry(optionFrame, textvariable= var)
  w.pack(side = LEFT)
  optionFrame.pack()
  return w


if __name__ == '__main__':
  root = Tk()


  dirBut = Button(root, text='askdirectory', command = askdirectory)
  dirBut.pack(side = RIGHT)

  directory = UserFileInput("", "Directory")


  root.mainloop()

Answer 1

你UserFileInput应该回来var,而不是w.然后你可以var.set(dirname)在你的askdirectory函数中使用,而不必返回任何东西.

不过我不确定你想要达到的目标text = str(dirname) if dirname else status.为什么不只是使用,text = status因为dirname还不能在那里定义？

编辑:这应该按照您希望的方式工作."打印输入文本"按钮显示您可以检索输入框中的任何内容,无论是由用户编写还是由代码放在那里.

from Tkinter import *
import tkFileDialog

def askdirectory():
  dirname = tkFileDialog.askdirectory()
  if dirname:
    var.set(dirname)

def UserFileInput(status,name):
  optionFrame = Frame(root)
  optionLabel = Label(optionFrame)
  optionLabel["text"] = name
  optionLabel.pack(side=LEFT)
  text = status
  var = StringVar(root)
  var.set(text)
  w = Entry(optionFrame, textvariable= var)
  w.pack(side = LEFT)
  optionFrame.pack()
  return w, var

def Print_entry():
  print var.get()

if __name__ == '__main__':
  root = Tk()

  dirBut = Button(root, text='askdirectory', command = askdirectory)
  dirBut.pack(side = RIGHT)
  getBut = Button(root, text='print entry text', command = Print_entry)
  getBut.pack(side = BOTTOM)

  w, var = UserFileInput("", "Directory")

  root.mainloop()