我有以下程序在Python中使用Tkinter。它以其简单的格式运行良好,但当我尝试将其转换为类方法时会出现错误。我正在跟踪以前的Tkinter GUI会话,将输入的值存储在文本文件中,并创建一个处理程序来跟踪会话的结束。当一个新的会话被打开,从以前会议的入账价值已经显示在输入框中使用类结构与Python协议删除窗口处理程序
#!usr/bin/env python
from Tkinter import *
# Define input retrieve function for application input
def retrieve_text():
print(app_entry.get())
def handler():
f = open("backup.txt", "w")
f.write(app_entry.get())
f.close()
app_win.destroy()
if __name__ == "__main__":
# Create window (or form)
app_win = Tk()
# Create label
app_label = Label(app_win, text="Enter value")
app_label.pack()
# Create entry box
t = open("backup.txt")
var1 = t.readlines()
Text = StringVar()
Text.set(var1[0])
app_entry = Entry(app_win,textvariable=Text)
app_entry.pack()
# Create button
app_button = Button(app_win, text="Print Value", command=app_win.retrieve_text)
app_button.pack()
app_win.protocol("WM_DELETE_WINDOW", handler)
# Initialize GUI loop
app_win.mainloop()
当我尝试转换为基于类的方法,我得到一个错误“MyGUI实例没有属性命名协议“。我的阶级结构如下:
#!usr/bin/env python
from Tkinter import *
class Tracker(Frame):
def __init__(self):
Frame.__init__(self)
# Create label
app_label = Label(self, text="Enter value")
app_label.pack()
# Create entry box
t = open("backup.txt")
var1 = t.readlines()
Text = StringVar()
Text.set(var1[0])
app_entry = Entry(self,textvariable=Text)
app_entry.pack()
# Create button
app_button = Button(self, text="Print Value", command=self.retrieve_text)
app_button.pack()
self.entry1 = app_entry.get()
self.protocol("WM_DELETE_WINDOW", self.handler)
def retrieve_text():
print(self.entry1)
def handler():
f = open("backup.txt", "w")
f.write(self.entry1)
f.close()
self.destroy()
if __name__ == "__main__":
# Create window (or form)
app = Tracker()
# Initialize GUI loop
app.mainloop()
谁能告诉我,我做错了什么?我指定我的“WM_DELETE_WINDOW”的位置是否正确?
对不起。我更新的问题显示了我一直在尝试的内容。 – prrao 2012-02-21 18:09:00