python, tkinter: Using grid layout, my frame refuses to display its contents

Question

Trying to use grid geometry instead of pack(), but using a frame without use of pack() has me lost. All I Want is a frame around it so that I can have a border and label around certain sections. I suspect the width and height parameters are the problem here.

from tkinter import *

class App:

    def __init__(self,master):

        frame = Frame(master,height=20,width=25)

        #Multiple buttons, over n rows and columns, these are just here to demonstrate my syntax
        self.action = Button(frame,text="action",command=self.doAction)
        self.action.grid(row=n,column=n)

    def doAction(self):
        print('Action')

root = Tk()

app = App(root)

root.mainloop()

Bryan Oakley · Accepted Answer · 2013-09-02 12:05:18Z

1

The frame you create in the first statement of the constructor is never placed anywhere in its parent window. Since the other widgets are children of this widget, they won't be displayed either.

answered Sep 2, 2013 at 12:05

Bryan Oakley

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2 Comments

everyonestartssomewhere Over a year ago

Whoops. Now, as an extension, how would I do this efficiently (bearing in mind that this will not be the only frame in the window), or if that's too long to write, why does this not work? frame = Frame(master) frame.place(master)

Bryan Oakley Over a year ago

@everyonestartssomewhere: Normally, you'll have a main function that creates several major sections, and it is responsible for calling grid, pack or place on those sections. Then, each section is responsible for calling grid, pack or place on it's children, and so on. In your case, I would make App a subclass of Frame rather than create a frame inside of it. Then, I would pack, place or grid it in the same scope that it is created (ie: app = App(root); app.pack(side="top", fill="both", expand=True)). See stackoverflow.com/a/17470842/7432 for an example.

xor · Accepted Answer · 2013-09-02 03:10:25Z

0

may be you are trying to do something like this.

class App:
    def __init__(self,master):

        frame = Frame(master,height=20,width=25)
        frame.grid()
        #Multiple buttons, over n rows and columns, these are just here to demonstrate my syntax
        for i in range(n):
            frame.columnconfigure(i,pad=3)
        for i in range(n):
            frame.rowconfigure(i,pad=3)

        for i in range(0,n):
            for j in range(0,n):
                self.action = Button(frame,text="action",command=self.doAction)
                self.action.grid(row=i,column=j)

    def doAction(self):
        print('Action')

answered Sep 2, 2013 at 3:10

xor

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1 Comment

everyonestartssomewhere Over a year ago

Very good code, I was not specific enough in my description, sorry. But thank you anyway, I like this code.

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