ttk Styling doesn't work inside functions

Question

I have some ttk buttons but they're inside a function and whenever I try to style it it doesn't work but when I create a new file and use same lines but without putting it inside functions it works just fine. Here's the snippet of code.

def function():
    if Something == Another thing: 
        r = Tk() # Opens new window
        r.title('Lorem ipsum')
        s = ttk.Style()
        s.configure('TButton', font=('Helvetica', 18))
        Button = ttk.Button(r, text = "lorem ipsum dolor sit amet",command = lorem ipsum,style="TButton")
        Label = ttk.Label(r, text = "Get total Stores Values and quantities")
        Label.place(relx = 0.2, rely= 0.4,anchor=CENTER)
        Button.place(relx = 0.5, rely= 0.4 ,width= 500 ,height = 50  ,anchor=CENTER)

Thanks and hope it's clear enough.

Read [Why are multiple instances of Tk discouraged?](https://stackoverflow.com/questions/48045401/why-are-multiple-instances-of-tk-discouraged) — stovfl, Feb 04 '20 at 14:31
Try `s = ttk.Style(r)`. But using multiple `Tk()` is not recommended. — acw1668, Feb 04 '20 at 14:33
I know it's not advised and it's not the best solution but the whole thing makes it a necessity and I must use multiple instances of Tk(). Anyway I need the solution to this on its current state. @acw1668 Sadly, this still doesn't work but thanks for the effort :) . — Mohamed Amr, Feb 04 '20 at 14:38
Your styles apply well on my windows system. Are you getting any error? — Somraj Chowdhury, Feb 04 '20 at 14:51
Unfortunately, it doesn't show any errors. It just doesn't apply the styling. I really don't know what to do.I'm also using Windows so it should work. I'll check again and try to figure it out. Thanks — Mohamed Amr, Feb 04 '20 at 14:57
@SomrajChowdhury I just thought of something. Maybe the problem is with the imports. What imports did you use and I'll check if there's something missing. Thanks a ton. — Mohamed Amr, Feb 04 '20 at 15:00
Thank you very very much. It worked. You can post it in an answer so I can give you the answer points I guess. I'm sorry but I don't know much about stackoverflow I'm just a newcomer. But thank you for your help. — Mohamed Amr, Feb 04 '20 at 15:16

score 2 · Accepted Answer · answered Feb 04 '20 at 15:33

Since there are multiple Tk() instances, you need to specify which instance the style belongs to:

from tkinter import *
from tkinter import ttk

def function():
    if True:
        r = Tk() # Opens new window
        r.geometry('600x400')
        r.title('Lorem ipsum')
        s = ttk.Style(r) # should specify which Tk instance
        s.configure('TButton', font=('Helvetica', 18))
        Button = ttk.Button(r, text="lorem ipsum dolor sit amet", style="TButton")
        Label = ttk.Label(r, text="Get total Stores Values and quantities")
        Label.place(relx=0.5, rely=0.4, anchor=CENTER)
        Button.place(relx=0.5, rely=0.6, width=500, height=50, anchor=CENTER)

root = Tk()
function()
root.mainloop()

Note that you used TButton as the style name which affects all the ttk.Button() (actually you can remove style="TButton"). Better to use other name like Custom.TButton if you want to apply the style to particular widgets only.

Avoid using multiple Tk() instances. Use Toplevel() if you can.

ttk Styling doesn't work inside functions

1 Answers1