ttk.Checkbutton OSError

[aatambo]

Run this code and you will find an OSError: cannot open resource

import tkinter as tk
import ttkbootstrap as ttk

root = tk.Tk()

c1 = ttk.Checkbutton(root, text='music')
c1.grid ()

root.mainloop()

N/B : If i add bootstyle='success-round-toggle' it works
What might be wrong? Why does it not work without a bootstyle configuration?
I'm using manjaro linux incase it might be helpful.

[israel-dryer]

Can you paste the exact error you are getting?

Can you give me a few more pieces of information:

• python version
• ttkbootstrap version

Do you get the same error if you do not import tkinter and instead used ttk.Window to create the root?

[aatambo]

python version 3.9.7
ttkbootstrap 1.5.0

I get the same errot still with ttk.window()

import ttkbootstrap as ttk
from ttkbootstrap.constants import *

root = ttk.Window()
root.geometry('800x500')


c = ttk.Checkbutton(root)
c.grid()

root.mainloop()

This is the error:

Traceback (most recent call last):
File "/home/dev-reflex/Desktop/Laboratory/zzz.py", line 9, in
c = ttk.Checkbutton(root)
File "/home/dev-reflex/.virtualenvs/tK/lib/python3.9/site-packages/ttkbootstrap/style.py", line 4825, in init
ttkstyle = Bootstyle.update_ttk_widget_style(
File "/home/dev-reflex/.virtualenvs/tK/lib/python3.9/site-packages/ttkbootstrap/style.py", line 4911, in update_ttk_widget_style
builder_method(builder, widget_color)
File "/home/dev-reflex/.virtualenvs/tK/lib/python3.9/site-packages/ttkbootstrap/style.py", line 3983, in create_checkbutton_style
images = self.create_checkbutton_assets(colorname)
File "/home/dev-reflex/.virtualenvs/tK/lib/python3.9/site-packages/ttkbootstrap/style.py", line 4053, in create_checkbutton_assets
fnt = ImageFont.truetype("FreeSerif.ttf", 130)
File "/home/dev-reflex/.virtualenvs/tK/lib/python3.9/site-packages/PIL/ImageFont.py", line 844, in truetype
return freetype(font)
File "/home/dev-reflex/.virtualenvs/tK/lib/python3.9/site-packages/PIL/ImageFont.py", line 841, in freetype
return FreeTypeFont(font, size, index, encoding, layout_engine)
File "/home/dev-reflex/.virtualenvs/tK/lib/python3.9/site-packages/PIL/ImageFont.py", line 193, in init
self.font = core.getfont(
OSError: cannot open resource

[israel-dryer]

Here is what I'm getting with other tests >>

Windows 11:

Raspberry Pi OS:

Linux Ubuntu via replit.it

[israel-dryer]

@aatambo, can you show the image of it working with the bootstyle? I'm confused why it would work at all with that error message.

[aatambo]

Does that mean it is either an Os related issue or python version?

[israel-dryer]

Does that mean it is either an Os related issue or python version?

I'm not sure. From the error, it appears that it is having trouble finding the FreeSerif font, but that wouldn't make sense if you say it is working with a bootstyle. I'm going to download the OS and try it out. I'm curious about it anyway. I'll see if I can get the same error to show up. Might be a day or so as I have to work.

[aatambo]

with bootstyle

without bootstyle

[israel-dryer]

ok, for whatever reason, the FreeSerif font is not installed in that distribution of Manjaro. Perhaps it's a minimal install version? The reason that the round-toggle works is because it does not use a font to render the button. The regular checkbox draws a checkmark using the FreeSerif font (on Linux) onto an image which displays in the button.

In the short term, you can fix by installing the FreeSerif font. I'm not familiar enough with Arch Linux to know how to do that. In the meantime, I'll look into adding another font check (perhaps the Noto family) so that it works with this distribution out-of-the-box.

[aatambo]

Okay thanks for your good work with ttkbootstrap.
Shall I close the issue now?

[israel-dryer]

You can leave it open until I resolve the font issue with that OS

[israel-dryer]

It's not my favorite choice, but I think I can make it work by adding the fallback font of DejaVuSans.ttf

[israel-dryer]

I was able to test this fix successfully on a Monjaro installation with version 1.5.1 using the new fallback font.

[aatambo]

Cool thanks