QListWidget Item different color for highlighted items

Question

I have a QListWidget in PySide2 and I would like different colors for the selected items. Is this possible? I will include 2 pictures to demonstrate.

What I have currently:

And this is what I would like to have:

Answer 1

You have to use a delegate and override the QPalette of the QStyleOptionViewItem. In the following example, the highlight color depends on whether it is an even row or not.

from PySide2 import QtCore, QtGui, QtWidgets
import random


class HighlightedDelegate(QtWidgets.QStyledItemDelegate):
    def initStyleOption(self, option, index):
        super(HighlightedDelegate, self).initStyleOption(option, index)
        # highlight color
        color = (
            QtGui.QColor("gray")
            if index.row() % 2 == 0
            else QtGui.QColor("salmon")
        )
        option.palette.setColor(
            QtGui.QPalette.Normal, QtGui.QPalette.Highlight, color
        )


if __name__ == "__main__":
    import sys

    app = QtWidgets.QApplication(sys.argv)

    w = QtWidgets.QListWidget(
        selectionMode=QtWidgets.QAbstractItemView.MultiSelection
    )
    delegate = HighlightedDelegate(w)
    w.setItemDelegate(delegate)
    for i in range(100):
        it = QtWidgets.QListWidgetItem("item-{}".format(i))
        w.addItem(it)
    w.resize(640, 480)
    w.show()
    sys.exit(app.exec_())