How to set stylesheet on QFileDialog?

Question

I'm trying to set my QFileDialog style sheet but is has not effect. Here is the code:

dial = QFileDialog()
dial.setStyleSheet(self.styleSheet())
path = dial.getOpenFileName(self, "Specify File")

Any ideas why this don't work?

Answer 1

I recommend to always set parents and use the inheritance of style sheets wherever possible. That way you can also use the static functions of QFileDialog.

I can confirm ekhumoros suspicion that the native file-dialog ignores the stylesheet. It indeed does on Windows.

Here the example using the Qt's built-in file-dialog.

from PyQt5 import QtWidgets

def show_file_dialog():
    QtWidgets.QFileDialog.getOpenFileName(b, options=QtWidgets.QFileDialog.DontUseNativeDialog)

app = QtWidgets.QApplication([])

b = QtWidgets.QPushButton('Test')
b.setStyleSheet("QWidget { background-color: yellow }")
b.clicked.connect(show_file_dialog)
b.show()

app.exec_()

which looks like