ScrolledText没有出现在Tkinter网格布局中

Question

When using .pack() with my ScrolledText widget for tkinter the proper box appears with a textbox that has a scrollbar. However when I switch it to use .grid() it no longer appears in the window. Just is gone.

Here is what the applicable part of my code looks like:

import tkinter as tk
import tkinter.scrolledtext as tkst
import tkinter.font as tkFont
import tkinter.ttk as ttk
class Application(tk.Frame):

def __init__(self, master=None):
    tk.Frame.__init__(self, master)
    # self.grid()
    self.createWidgets()

def createWidgets(self):
    self.logArea = tkst.ScrolledText(self,
                wrap   = tk.WORD,
                width  = 20,
                height = 8,
                state="disabled",
                name="logArea"
            )
            self.logArea.grid(padx=10, pady=10,row=1, sticky=tk.W)

root = tk.Tk()
app = Application(master=root)
app.mainloop()

I have a Treeview widget on row 1 which displays fine, just for some reason this ScrolledText widget does not display at all, but worked fine when I was using just pack() before.

Any idea what is wrong?

Edit: I added a self.master = master to the init and then used self.master instead of just self within my init of ScrolledText. I am not sure why this fixed the problem and it would be nice to know why this fixed it.

Answer 1

This revision, with the class statement added, the Application frame gridded into the root window, and the text box not disabled, works.

import tkinter as tk
import tkinter.scrolledtext as tkst
import tkinter.font as tkFont
import tkinter.ttk as ttk

class Application(tk.Frame):
    def __init__(self, master=None):
        tk.Frame.__init__(self, master)
        self.grid()
        self.createWidgets()
    def createWidgets(self):
        self.logArea = tkst.ScrolledText(self,
                    wrap   = tk.WORD,
                    width  = 20,
                    height = 8,
                    #state="disabled",
                    name="logArea"
                )
        self.logArea.grid(padx=10, pady=10,row=1, sticky=tk.W)
        self.logArea.insert('1.0', 'test insertion')

root = tk.Tk()
app = Application(root)
app.mainloop()