def setBrush(self, brush: QBrush, autoTextColor: bool = True):
super().setBrush(brush)
if autoTextColor:
# Calculate the perceptive luminance (aka luma) - human eye favors green color...
# See https://stackoverflow.com/questions/1855884/determine-font-color-based-on-background-color
color = QBrush(brush).color()
if color.alpha() < 128:
self._text_color = QColor(Qt.black)
else:
luma = (0.299 * color.red() + 0.587 * color.green() + 0.114 * color.blue()) / 255
self._text_color = QColor(Qt.black) if luma > 0.5 else QColor(Qt.white)
