upgrade to PyQt6

[caver456]

PyQt6 came out in Jan 2021. That's been plenty of time for the kinks to get worked out.

There are indications/hopes that PyQt6 might fix some font size / dpi issue scaling issues - see #683 and #633.

For some issues regarding display (#668, #669, maybe others) it will make more sense to do the investigation after the upgrade - heck, upgrading may even fix them!

Here's a good web page that talks about the migration procedure:

https://www.pythonguis.com/faq/pyqt5-vs-pyqt6

[caver456]

Looks like pyqt6 doesn't work with python 3.10 or later. There are several discussions on the web about this. Basically:

PS C:\Users\caver\Documents\GitHub\radiolog> pip install pyqt6
Defaulting to user installation because normal site-packages is not writeable
Collecting pyqt6
  Downloading PyQt6-6.6.0.tar.gz (1.0 MB)
     ---------------------------------------- 1.0/1.0 MB 4.4 MB/s eta 0:00:00
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Preparing metadata (pyproject.toml) ... error
  error: subprocess-exited-with-error

  × Preparing metadata (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [22 lines of output]
      Traceback (most recent call last):
        File "C:\Users\caver\AppData\Roaming\Python\Python310-32\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", line 353, in <module>
...
...

there's no obviously useful info in the traceback, as it seems to refer to a generated file and would take a lot of work to track down.

This link may be a solution - though it sounds a bit odd, and, would need to make sure it works on a built installation.

[caver456]

This thread has more detail, and this comment near the end of the thread seems to provide a solution - probably the same thing as mentioned above.

[caver456]

Also, it looks like Qt6 doesn't work on 32bit - only 64bit: https://doc.qt.io/qt-6/supported-platforms.html

So maybe it's time to jump to 64bit...

[caver456]

Also notice at the Qt docs that Qt6 only supports windows 10 1809 or newer (Oct 2018) and Windows 11. Maybe not a big deal - that is 5 years ago - but, it could potentially be cutting off any current radiolog users who have old versions of Windows.

Either way - should still move forward with a test case of 64bit-everything in a virtualenv. If pyqt6 doesn't fix anything, then maybe it's not worth upgrading anyway.

[caver456]

In the virtualenv, Windows 10, python 3.12 64bit: pyqt6 installed from wheels with no action needed. Interesting, but, OK:

(v64) PS C:\Users\caver\Documents\v> pip install -r ..\GitHub\radiolog\requirements.txt
...
...
(note, Pillow 10.1.0 installed from wheel on this combo as well, which is very nice)
...
(v64) PS C:\Users\caver\Documents\v> pip install pyqt6
Collecting pyqt6
  Downloading PyQt6-6.6.0-cp37-abi3-win_amd64.whl.metadata (2.2 kB)
Collecting PyQt6-sip<14,>=13.6 (from pyqt6)
  Downloading PyQt6_sip-13.6.0-cp312-cp312-win_amd64.whl.metadata (524 bytes)
Collecting PyQt6-Qt6>=6.6.0 (from pyqt6)
  Downloading PyQt6_Qt6-6.6.0-py3-none-win_amd64.whl.metadata (551 bytes)
Downloading PyQt6-6.6.0-cp37-abi3-win_amd64.whl (6.5 MB)
   ---------------------------------------- 6.5/6.5 MB 5.7 MB/s eta 0:00:00
Downloading PyQt6_Qt6-6.6.0-py3-none-win_amd64.whl (62.1 MB)
   ---------------------------------------- 62.1/62.1 MB 6.3 MB/s eta 0:00:00
Downloading PyQt6_sip-13.6.0-cp312-cp312-win_amd64.whl (73 kB)
   ---------------------------------------- 73.1/73.1 kB 3.9 MB/s eta 0:00:00
Installing collected packages: PyQt6-Qt6, PyQt6-sip, pyqt6
Successfully installed PyQt6-Qt6-6.6.0 PyQt6-sip-13.6.0 pyqt6-6.6.0
(v64) PS C:\Users\caver\Documents\v> python -VV
Python 3.12.0 (tags/v3.12.0:0fb18b0, Oct  2 2023, 13:03:39) [MSC v.1935 64 bit (AMD64)]
(v64) PS C:\Users\caver\Documents\v> pip list
Package            Version
------------------ ----------
certifi            2023.11.17
charset-normalizer 3.3.2
idna               3.6
Pillow             10.1.0
pip                23.3.1
PyGeodesy          23.11.11
PyPDF2             3.0.1
pypiwin32          223
PyQt5              5.15.10
PyQt5-Qt5          5.15.2
PyQt5-sip          12.13.0
PyQt6              6.6.0
PyQt6-Qt6          6.6.0
PyQt6-sip          13.6.0
pyserial           3.5
pywin32            306
reportlab          4.0.7
requests           2.31.0
urllib3            2.1.0
(v64) PS C:\Users\caver\Documents\v>

Onwards.