How to set a tkinter window to a constant size
You turn off pack_propagate
by setting pack_propagate(0)
Turning off pack_propagate
here basically says don't let the widgets inside the frame control it's size. So you've set it's width and height to be 500. Turning off propagate stills allows it to be this size without the widgets changing the size of the frame to fill their respective width / heights which is what would happen normally
To turn off resizing the root window, you can set root.resizable(0, 0)
, where resizing is allowed in the x
and y
directions respectively.
To set a maxsize to window, as noted in the other answer you can set the maxsize
attribute or minsize
although you could just set the geometry of the root window and then turn off resizing. A bit more flexible imo.
Whenever you set grid
or pack
on a widget it will return None
. So, if you want to be able to keep a reference to the widget object you shouldn't be setting a variabe to a widget where you're calling grid
or pack
on it. You should instead set the variable to be the widget Widget(master, ....)
and then call pack
or grid
on the widget instead.
import tkinter as tk
def startgame():
pass
mw = tk.Tk()
#If you have a large number of widgets, like it looks like you will for your
#game you can specify the attributes for all widgets simply like this.
mw.option_add("*Button.Background", "black")
mw.option_add("*Button.Foreground", "red")
mw.title('The game')
#You can set the geometry attribute to change the root windows size
mw.geometry("500x500") #You want the size of the app to be 500x500
mw.resizable(0, 0) #Don't allow resizing in the x or y direction
back = tk.Frame(master=mw,bg='black')
back.pack_propagate(0) #Don't allow the widgets inside to determine the frame's width / height
back.pack(fill=tk.BOTH, expand=1) #Expand the frame to fill the root window
#Changed variables so you don't have these set to None from .pack()
go = tk.Button(master=back, text='Start Game', command=startgame)
go.pack()
close = tk.Button(master=back, text='Quit', command=mw.destroy)
close.pack()
info = tk.Label(master=back, text='Made by me!', bg='red', fg='black')
info.pack()
mw.mainloop()
If you want a window as a whole to have a specific size, you can just give it the size you want with the geometry
command. That's really all you need to do.
For example:
mw.geometry("500x500")
Though, you'll also want to make sure that the widgets inside the window resize properly, so change how you add the frame to this:
back.pack(fill="both", expand=True)
Try parent_window.maxsize(x,x);
to set the maximum size. It shouldn't get larger even if you set the background, etc.
Edit: use parent_window.minsize(x,x)
also to set it to a constant size!