QTableView formatting depends on app style

George55978

Hi!
I have an issue with this simple code:

import sys
from datetime import datetime

from PyQt6 import QtCore, QtGui, QtWidgets
from PyQt6.QtCore import Qt

class TableModel(QtCore.QAbstractTableModel):
    def __init__(self, data):
        super().__init__()
        self._data = data

    def data(self, index, role):
        if role == Qt.ItemDataRole.ForegroundRole:
            value = self._data[index.row()][index.column()]

            if (
                isinstance(value, int) or isinstance(value, float)
            ) and value < 0:
                return QtGui.QColor("red")

        if role == Qt.ItemDataRole.DisplayRole:
            value = self._data[index.row()][index.column()]

            if isinstance(value, datetime):
                return value.strftime("%Y-%m-%d")

            return value

    def rowCount(self, index):
        return len(self._data)

    def columnCount(self, index):
        return len(self._data[0])

class MainWindow(QtWidgets.QMainWindow):
    def __init__(self):
        super().__init__()

        self.table = QtWidgets.QTableView()

        data = [
            [4, 9, 2],
            [1, -1, "hello"],
            [3.023, 5, -5],
            [3, 3, datetime(2017, 10, 1)],
            [7.555, 8, 9],
        ]

        self.model = TableModel(data)
        self.table.setModel(self.model)

        self.setCentralWidget(self.table)
        self.setGeometry(600, 100, 400, 200)

app = QtWidgets.QApplication(sys.argv)
# app.setStyle("Fusion")
window = MainWindow()
window.show()
app.exec()

It formats the QTableView somehow. But it doesn't do it with the foreground color. For the default application style, it seems to just ignore the foreground formatting (Figure 1).

Fig.1
For the fusion style, things are better. (Just uncomment app.setStyle("Fusion"), Figure 2):

Fig.2

This code worked fine until recently but from some point it broke.
Any ideas what might have gone wrong?

Package Version

pip 24.2
PyQt6 6.7.1
PyQt6-Qt6 6.7.2
PyQt6_sip 13.8.0

Processor 11th Gen Intel(R) Core(TM) i3-1115G4 @ 3.00GHz 3.00 GHz
Installed RAM 8,00 GB (7,75 GB usable)
System type 64-bit operating system, x64-based processor

Edition Windows 11 Pro
Version 23H2
OS build 22631.4037

SGaist

Hi,

There's a new style for Windows11 that seems to have some issue. You can also try the windowsvista style.

George55978

@SGaist said in QTableView formatting depends on app style:

Hi,

There's a new style for Windows11 that seems to have some issue. You can also try the windowsvista style.

Yes, you're right, thanks.
I kept looking for and found that: [https://bugreports.qt.io/browse/QTBUG-126543](link url) so it is definetely a bug.