blank tkinter window when executing

Question

I'm coding a Tkinter, which much consist of a checkbox and File Menu containing Save Option.

Problem: It comes in 2 tkinter instead of one. One is a blank GUI, and another consists of my checkbox, textbox, file and save.

How to avoid the blank GUI?

My code:

from Tkinter import *
import Tkinter
from tkFileDialog import askopenfile, asksaveasfile
import tkFileDialog

class myproject(Tkinter.Tk):
    def __init__(self,parent):
        Tkinter.Tk.__init__(self)
        self.textbox()
        self.checkbox2()
    def textbox(self):
        self.txt1 = Tkinter.Text(root, borderwidth=3, relief="sunken", height=4,width=55)
        self.txt1.config(font=("consolas", 12), undo=True, wrap='word')
        self.txt1.grid(row=0, column=1, sticky="nsew", padx=2, pady=2)
    def checkbox2(self): #self.checkbox
        checkbox = Tkinter.Checkbutton(root, text = " ")
        checkbox.grid(column=1,row=2)


    def file_save(self):
        f = asksaveasfile(mode='w', defaultextension=".txt")


root = Tkinter.Tk()

menubar = Menu(root)
root.configure(menu=menubar)

filemenu = Menu(menubar,tearoff=0)
menubar.add_cascade(label="File", menu=filemenu)
filemenu.add_command(label="Save", command=myproject.file_save)
app = myproject(None)
app.mainloop()

Why is the master of txt1 root?

User
– User

2014-11-08 06:41:13 +00:00
Commented Nov 8, 2014 at 6:41 — User
– User, Commented Nov 8, 2014 at 6:41

twasbrillig · Accepted Answer · 2014-11-08 07:11:30Z

3

I reworked your code to make it work.

What was changed: You had 2 variables root and app, one of which was creating the blank window. I changed it to just use a single variable root, which is initialized to myproject at the start.

Instead of using root in your functions, I changed those to self, because self inherits from Tkinter.Tk as well.

And in the __init__ function, I removed the variable parent which was unused.

Update: Also in the call to filemenu.add_command, it is changed to pass in root.file_save instead of myproject.file_save. Thanks PM 2Ring.

from Tkinter import *
import Tkinter
from tkFileDialog import askopenfile, asksaveasfile
import tkFileDialog

class myproject(Tkinter.Tk):
    def __init__(self):
        Tkinter.Tk.__init__(self)
        self.textbox()
        self.checkbox2()
    def textbox(self):
        self.txt1 = Tkinter.Text(self, borderwidth=3, relief="sunken", height=4,width=55)
        self.txt1.config(font=("consolas", 12), undo=True, wrap='word')
        self.txt1.grid(row=0, column=1, sticky="nsew", padx=2, pady=2)
    def checkbox2(self): #self.checkbox
        checkbox = Tkinter.Checkbutton(self, text = " ")
        checkbox.grid(column=1,row=2)
    def file_save(self):
        f = asksaveasfile(mode='w', defaultextension=".txt")

root = myproject()

menubar = Menu(root)
root.configure(menu=menubar)

filemenu = Menu(menubar,tearoff=0)
menubar.add_cascade(label="File", menu=filemenu)
filemenu.add_command(label="Save", command=root.file_save)
root.mainloop()

edited Nov 8, 2014 at 7:11

answered Nov 8, 2014 at 7:00

twasbrillig

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1 Comment

twasbrillig Over a year ago

Thanks PM 2Ring! I missed the one you mentioned, and now fixed it above.

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