Fix styling on PySide6

[meowmeowahr]

Issue

QWidget.setStyle on PySide6 only accepts a QStyle class, while PyQt5, PyQt6, and PySide2 can accept a QStyle or a string. This causes qtawesome.dark() / qtawesome.light() to fail on PySide6.

Change

This change fixes the issue by using QStyleFactory.create() to set the application style in styles.py

[dalthviz]

Hi @meowmeowahr thank you for submitting a fix! Do this issue raise with a specific version of PySide6? I tried to see if running things from master using PySide6 6.7.2 caused any issue related with the style but seems like I was unable to reproduce 🤔 Could you explain a little bit more how setting the app style was raising an issue for you or add some before/after screenshot preview to better understand how this change affects how things look? Thank you again for proposing changes and let us know!

[meowmeowahr]

I can't seem to reproduce the issue anymore. I have tried all versions of PySide6 on both Linux and WIndows and it works fine with the code on master and my fork.

Here is my test code

from PySide6.QtCore import Qt, qVersion
from PySide6.QtWidgets import QWidget, QApplication, QPushButton, QVBoxLayout
import sys

import qtawesome

print("Qt", qVersion())

class TestWindow(QWidget):
    def __init__(self) -> None:
        super().__init__()
        
        self.vlayout = QVBoxLayout()
        self.setLayout(self.vlayout)

        self.light = QPushButton("Light")
        self.light.clicked.connect(lambda: qtawesome.light(app))
        self.vlayout.addWidget(self.light)

        self.dark = QPushButton("Dark")
        self.dark.clicked.connect(lambda: qtawesome.dark(app))
        self.vlayout.addWidget(self.dark)

        self.show()


if __name__ == "__main__":
    app = QApplication(sys.argv)
    win = TestWindow()
    app.exec()

[dalthviz]

Oh thank you for the check! In that case it seems like the change is not needed, right? I would say we could close this one for now, but if you find a way to reproduce the issue let us know to be able to restart checking this work!

[meowmeowahr]

Thanks, I don't think the change is needed as of now. I will close the PR.