How to make Tkinter columns of equal width when widgets span multiple columns (Python 2.7)

Question

In the following, the buttons labelled \'ONE\', \'TWO\', and \'THR\' do not get evenly spaced out. It seems to me that the root of the problem is that Tk is assuming a defau

Answer 1

old post I know, but I also struggled to get the columns and rows to maintain a common width/height so I thought I would share my solution

newish to python and tkinter, so if there are any mistakes please let me know

I created a grid manager, this allowed the main window and any frame to be setup with evenly spaced columns and rows, it's not 100% but for what I was using it for it worked well, it was especially useful during the building phase

one downside when creating a frame is the maximum number of rows/columns of the frame must be equal to or less than the number or rows/columns it is spanning, otherwise it goes a bit weird (nut sure why)

hope this helps

import tkinter

class grid_manager:
    def __init__(self, Frame, colour = "gray94"):
        self.Frame = Frame
        self.Colour = colour

    def set_grid(self, numofRows, numofColumns, borderwidth = 1):
        self.numofRows = numofRows
        self.numofColumns = numofColumns
        self.borderwidth = borderwidth
        for i in range(numofRows):
            for j in range(numofColumns):
                canvas = tkinter.Canvas(self.Frame)
                canvas.config(relief="raised", borderwidth=self.borderwidth)   #comment out to hide grid layout
                canvas.grid(row=i, column=j)
                canvas.config(background=self.Colour)
                self.Frame.columnconfigure(j, weight=1)
            self.Frame.rowconfigure(i, weight=1)

mainwindow = tkinter.Tk()

mainwindow.title("Test")
mainwindow.geometry("640x480-8-200")
mainGrid = grid_manager(mainwindow)
mainGrid.set_grid(10, 10)

header_Frame = tkinter.Frame(mainwindow)
header_Frame.grid(row=0, column=0, columnspan=10, sticky="nsew")
headerGrid = grid_manager(header_Frame)
headerGrid.set_grid(numofRows=1, numofColumns=10, borderwidth=5)

footerFrame = tkinter.Frame(mainwindow)
footerFrame.grid(row=9, column=0, columnspan=10, sticky="nsew")
footerGrid = grid_manager(footerFrame, "red")
footerGrid.set_grid(numofRows=1, numofColumns=10, borderwidth=5)

rightFrame = tkinter.Frame(mainwindow)
rightFrame.grid(row=1, column=5, rowspan=5, columnspan=5, sticky="nsew")
rightGrid = grid_manager(rightFrame, "blue")
rightGrid.set_grid(numofRows=5, numofColumns=5, borderwidth=2)

leftFrame = tkinter.Frame(mainwindow)
leftFrame.grid(row=3, column=0, rowspan=5, columnspan=4, sticky="nsew")
leftGrid = grid_manager(leftFrame, "yellow")
leftGrid.set_grid(numofRows=5, numofColumns=4, borderwidth=2)

mainwindow.mainloop()

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