Python Tk顯示和編輯文件

-2

我想在Tkinter中編寫一個Python GUI程序。我有基本的模板，但是當你點擊File > Open時，我需要它來打開一個文件。Python Tk顯示和編輯文件

我該如何添加此功能？菜單欄和標籤已經在那裏。

#!/usr/bin/python 
# -*- coding: utf-8 -*- 
from ScrolledText import * 
import tkFileDialog 
import tkMessageBox 
from Tkinter import Tk, Text, BOTH, W, N, E, S, Menu 
from ttk import Frame, Button, Label, Style 

def main(): 

    root = Tk() 
    root.geometry("350x300+300+300") 
    app = Example(root) 
    root.mainloop() 

class Example(Frame): 

    def __init__(self, parent): 
     Frame.__init__(self, parent) 

     self.parent = parent 

     self.initUI() 

    def initUI(self): 
     self.parent.title("Grades") 
     self.style = Style() 
     self.style.theme_use("default") 
     self.pack(fill=BOTH, expand=1) 

     self.columnconfigure(1, weight=1) 
     self.columnconfigure(3, pad=7) 
     self.rowconfigure(3, weight=1) 
     self.rowconfigure(5, pad=7) 

     lbl = Label(self, text="Grades:") 
     lbl.grid(sticky=W, pady=4, padx=5) 

     lbl = Label(self, text="Average\n Grade:") 
     lbl.grid(row=3, column=3, pady=5) 

     textPad = ScrolledText(self) 
     textPad.grid(row=1, column=0, columnspan=2, rowspan=4, padx=5, sticky=E+W+S+N) 

     abtn = Button(self, text="Save",command=save_command) 
     abtn.grid(row=1, column=3) 

     cbtn = Button(self, text="Close") 
     cbtn.grid(row=2, column=3, pady=4) 

     hbtn = Button(self, text="Help", command=about_command) 
     hbtn.grid(row=5, column=0, padx=5) 

     obtn = Button(self, text="OK") 
     obtn.grid(row=5, column=3)   

     menubar = Menu(self.parent) 
     self.parent.config(menu=menubar) 

     fileMenu = Menu(menubar)  

     submenu = Menu(fileMenu) 
     submenu.add_command(label="Student") 
     submenu.add_command(label="New Student") 
     fileMenu.add_cascade(label='Import', menu=submenu, underline=0) 
     fileMenu.add_command(label="Open...", command=open_command) 

     fileMenu.add_separator() 

     fileMenu.add_command(label="Exit", underline=0, command=self.onExit) 
     menubar.add_cascade(label="File", underline=0, menu=fileMenu)   


    def onExit(self): 
     self.quit() 

def about_command(): 
    label = tkMessageBox.showinfo("About", "Grade keeping\n program by Starwarsfan2099") 

def save_command(self): 
    file = tkFileDialog.asksaveasfile(mode='w') 
    if file != None: 
    # slice off the last character from get, as an extra return is added 
     data = self.textPad.get('1.0', END+'-1c') 
     file.write(data) 
     file.close() 

def open_command(): 
     file = tkFileDialog.askopenfile(mode='rb',title='Select a file') 
     if file != None: 
      contents = file.read() 
      textPad.insert('1.0',contents) 
      file.close() 


if __name__ == '__main__': 
    main()

來源

2015-09-01 Starwarsfan2099

textPad是一個局部變量來的initUI方法，並且該方法終止之後因此，該參考對象將被丟失。換句話說，您不能從initUI函數以外訪問textPad。

在你initUI方法，更改以下兩行：

textPad = ScrolledText(self) 
textPad.grid(row=1, column=0, columnspan=2, rowspan=4, padx=5, sticky=E+W+S+N)

以（使textPad類Example的字段）：

self.textPad = ScrolledText(self) 
self.textPad.grid(row=1, column=0, columnspan=2, rowspan=4, padx=5, sticky=E+W+S+N)

我已經改變了你的代碼的其他東西爲了改善它。具體地說，我做了類Example等

#!/usr/bin/env python 
# -*- coding: utf-8 -*- 


from ScrolledText import * 
import tkFileDialog 
import tkMessageBox 
from Tkinter import Tk, Text, BOTH, W, N, E, S, Menu 
from ttk import Frame, Button, Label, Style 


class Example(Frame): 

    def __init__(self, parent): 
     Frame.__init__(self, parent) 
     self.parent = parent 
     self.initUI() 

    def initUI(self): 
     self.parent.title("Grades") 
     self.style = Style() 
     self.style.theme_use("default") 
     self.pack(fill=BOTH, expand=1) 

     self.columnconfigure(1, weight=1) 
     self.columnconfigure(3, pad=7) 
     self.rowconfigure(3, weight=1) 
     self.rowconfigure(5, pad=7) 

     lbl = Label(self, text="Grades:") 
     lbl.grid(sticky=W, pady=4, padx=5) 

     lbl = Label(self, text="Average\n Grade:") 
     lbl.grid(row=3, column=3, pady=5) 

     self.textPad = ScrolledText(self) 
     self.textPad.grid(row=1, column=0, columnspan=2, rowspan=4, padx=5, sticky=E+W+S+N) 

     abtn = Button(self, text="Save",command=self.save_command) 
     abtn.grid(row=1, column=3) 

     cbtn = Button(self, text="Close", command=self.onExit) 
     cbtn.grid(row=2, column=3, pady=4) 

     hbtn = Button(self, text="Help", command=self.about_command) 
     hbtn.grid(row=5, column=0, padx=5) 

     obtn = Button(self, text="OK") 
     obtn.grid(row=5, column=3)   

     menubar = Menu(self.parent) 
     self.parent.config(menu=menubar) 

     fileMenu = Menu(menubar)  

     submenu = Menu(fileMenu) 
     submenu.add_command(label="Student") 
     submenu.add_command(label="New Student") 

     fileMenu.add_cascade(label='Import', menu=submenu, underline=0) 
     fileMenu.add_command(label="Open...", command=self.open_command) 
     fileMenu.add_separator() 
     fileMenu.add_command(label="Exit", underline=0, command=self.onExit) 

     menubar.add_cascade(label="File", underline=0, menu=fileMenu)   

    def onExit(self): 
     self.parent.destroy() 

    def about_command(self): 
     label = tkMessageBox.showinfo("About", "Grade keeping\n program by Starwarsfan2099") 

    def save_command(self): 
     file = tkFileDialog.asksaveasfile(mode='w') 
     if file != None: 
     # slice off the last character from get, as an extra return is added 
      data = self.textPad.get('1.0', 'end-1c') 
      file.write(data) 
      file.close() 

    def open_command(self): 
      file = tkFileDialog.askopenfile(mode='rb',title='Select a file') 
      if file != None: 
       contents = file.read() 
       self.textPad.insert('1.0', contents) 
       file.close() 


def main(): 
    root = Tk() 
    root.geometry("350x300+300+300") 
    app = Example(root) 
    root.mainloop() 


if __name__ == '__main__': 
    main()

反正這些全局函數的方法，我鼓勵你查找的變化，讓你明白你沒有做什麼，這麼好。說實話，我沒有完全看過它，但我所做的改變是IMO的改進。

來源

2015-09-02 01:19:16 nbro

Python Tk顯示和編輯文件

回答

相關問題