Styling the popup of a QCompleter in PyQt

Question

Is is possible to apply a stylesheet to the popup portion of a QCompleter tied to a QCombobox? If not, does it require delegate magic? If so, how might that even work as they do tend to confuse the hell out of me. Here is my widget code:

class autoFillField(QComboBox):
    def __init__(self, parent=None):
        super(autoFillField, self).__init__(parent)

        self.setFocusPolicy(Qt.NoFocus)
        self.setEditable(True)

        self.addItem("")

        self.pFilterModel = QSortFilterProxyModel(self)
        self.pFilterModel.setFilterCaseSensitivity(Qt.CaseInsensitive)
        self.pFilterModel.setSourceModel(self.model())

        self.completer = QCompleter(self.pFilterModel, self)
        self.completer.setCompletionMode(QCompleter.UnfilteredPopupCompletion)
        self.setCompleter(self.completer)
        self.setStyleSheet(STYLING FOR COMBOBOX HERE, BUT NOT POPUP)

        self.lineEdit().textEdited[unicode].connect(self.pFilterModel.setFilterFixedString)

    def on_completer_activated(self, text):
        if text:
            index = self.findText(text)
            self.setCurrentIndex(index)

    def setModel(self, model):
        super(autoFillField, self).setModel(model)
        self.pFilterModel.setSourceModel(model)
        self.completer.setModel(self.pFilterModel)

    def setModelColumn(self, column):
        self.completer.setCompletionColumn(column)
        self.pFilterModel.setFilterKeyColumn(column)
        super(autoFillField, self).setModelColumn(column)

Would the popup styling take place in the combobox class, or would it happen outside of it where the data is input via addItems? Thanks in advance.

Answer 1

Set the stylesheet of the popup of the completer, which will be a QListView object. Here is a runnable example (the background of the popup should be yellow):

#!/usr/bin/python

import sys
from PyQt4 import QtGui, QtCore

app = QtGui.QApplication(sys.argv)

w = QtGui.QComboBox()
w.setEditable(True)
c = QtGui.QCompleter(['Hello', 'World'])
c.setCompletionMode(QtGui.QCompleter.UnfilteredPopupCompletion)
c.popup().setStyleSheet("background-color: yellow")
w.setCompleter(c)
w.show()

sys.exit(app.exec_())