[PyQt] QScintilla problem take 2 - style sheets

[Barry]

> On 2 Sep 2019, at 21:36, Phil Thompson <phil at riverbankcomputing.com> wrote:
> 
>> On 02/09/2019 16:14, Barry Scott wrote:
>> Phil,
>> Are you able to comment on this problem?
>> Is there something more I need to change in my code or is this a
>> problem in the QScintilla code?
> 
> Regressions are usually Qt bugs so you need to demonstrate that the problem is with either PyQt or QScintilla (and which versions).

I listed the bersion of good and bad pypi packages.
But I think you are asking that I write C++ code to show if the bug is
In PyQt world of scintilla/Qt world?

Barry

> 
> Phil
> 
>>> On 25 Aug 2019, at 17:29, Barry Scott <barry at barrys-emacs.org> wrote:
>>> I have changed my code to use the high level setFont() call and found that worked in some cases.
>>> But If I set styles on QApplication then QScintilla  does no use the family from setFont, only the point size.
>>> I use setStyleSheet() to customise the UI font use in the larger app.
>>> The attached code shows this issue - it was tested on macOS and I think uses fonts that are always
>>> installed on macOS to show the problem. However this issue is also present on windows builds.
>>> This looks like a regression going from PyQT 5.12 to PyQt 5.13. Or is it a deliberate change?
>>> I tested with 2 venv's setup like this:
>>> #!/bin/bash
>>> echo "Info: setup PyQt 5.13 with QSci"
>>> python3.7 -m venv create qsci-5-13
>>> qsci-5-13/bin/pip install PyQt5 QScintilla xml-preferences
>>> echo "Info: setup PyQt 5.12 with QSci"
>>> python3.7 -m venv create qsci-5-12
>>> qsci-5-12/bin/pip install PyQt5==5.12.2 QScintilla==2.11.1 xml-preferences
>>> Then run the attached code against each venv with and without the --style option.
>>> The follow 3 runs show identical windows contents.
>>>    qsci-5-12/bin/python qsci_bug.py
>>>    qsci-5-12/bin/python qsci_bug.py --style
>>>    qsci-5-13/bin/python qsci_bug.py
>>> But this run does not use the intended font.
>>>    qsci-5-13/bin/python qsci_bug.py --style
>>> Text is draw with different fonts.
>>> Barry
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