python: imshow buttons are empty

[danopdev]

System information (version)

• OpenCV => 4.2
• Operating System / Platform => Linux Mint 64 Bit
• Compiler => gcc

Detailed description

Using python3 on linux the imshow has a toolbar but buttons are invisible.
Hovering with mouse we can see the button borders and tooltips but there is no image or text in the button.

Steps to reproduce

import cv2

img = cv2.imread("1.jpg")
cv2.imshow("test", img)
cv2.waitKey(0)

It's not related with a particular image, but this is the one I use for test.

This is the screenshot:

Issue submission checklist

• [ x ] I report the issue, it's not a question
• [ x ] I checked the problem with documentation, FAQ, open issues,
  forum.opencv.org, Stack Overflow, etc and have not found any solution
• [ ] I updated to the latest OpenCV version and the issue is still there
• [ x ] There is reproducer code and related data files: videos, images, onnx, etc

[danopdev]

Hi @alalek, can you please give me the issue it duplicates ? (I may miss it)

[alalek]

Here: opencv/opencv-python#213

[danopdev]

Thank you. To bad the suggested work around does not seems to work on my machine.