Why doesn't the width of the frame show once ran?-CodePudding

I specified a width for a frame, then I grid a button in it asking for it to be the widest it can using

from tkinter import *
root = Tk()
frame = Frame(root, width=100, height=100, background="#ffffff")
frame.pack()
btn = Button(frame, text="Hello").grid(row=0, column=0, sticky="we")
root.mainloop()

but it actually doesn't occupy the whole length of the frame, the frame is not even white. If I comment the button line it works just fine though. Why is that?

CodePudding user response：

This is what the commentors were telling you to do. Tell your frame not to propagate to grid.

from tkinter import *

root = Tk()
frame = Frame(root, width=500, height=500, background="red")
frame.pack()
frame.grid_propagate(0) # this fixes the frame issue you are having
btn = Button(frame, text="Hello")
btn.grid(row=0, column=0, sticky="we")
root.mainloop()

CodePudding user response：

I can suppose that it because u place your button 'on' frame, not on root. Hopefully, this will fix your problem:

btn = Button(root, text="Hello").pack()#.grid(row=0, column=0, sticky="we")