tkinter, wm_state('zoomed') does not work on my app

Question

I'm running root.wm_state('zoomed') on my GUI app but it's just slightly moving my Window towards the bottom right.

I have no clue why it's happening. Can anyone help?

Minimal reproducible example:

import customtkinter as ctk

class MainApp(ctk.CTk):
        def __init__(self, *args, **kwargs):
            super().__init__(*args, **kwargs)
        
            self.title("Test Window")
            self.state('zoomed')

mapp = MainApp()
mapp.mainloop()

Cannot reproduce the issue in my Windows 7 with Python 3.8.16. It is better to provide a [mre]. — acw1668, May 18 '23 at 02:09
On windows and mac you can use `wm_state` on X11 you use `wm_attributes('-zoomed', True)` — Thingamabobs, May 18 '23 at 10:50
Does this answer your question? [tkinter python maximize window](https://stackoverflow.com/questions/15981000/tkinter-python-maximize-window) — Thingamabobs, May 18 '23 at 10:51
I've provided an example, no idea why it isn't working. Maybe something in my system not letting it maximize? — Canoe, May 19 '23 at 00:43
Yes I am on Windows. I am using Python 3.10.11 on Windows 10 — Canoe, May 19 '23 at 01:29

score 0 · Accepted Answer · answered May 19 '23 at 01:39

As customtkinter overrides .mainloop() and call .deiconify() inside the override .mainloop() if it is Windows platform, so the effect of self.wm_state('zoomed') inside __init__() is override as well.

You can delay the calling of self.wm_state('zoomed') a bit by changing that line to self.after(1, self.wm_state, 'zoomed') so it is called after the .deiconify().

import customtkinter as ctk

class MainApp(ctk.CTk):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.title("Test Window")
        self.after(1, self.wm_state, 'zoomed')

mapp = MainApp()
mapp.mainloop()

tkinter, wm_state('zoomed') does not work on my app

1 Answers1