I used to do this with:

self.sourceModel().headerChanged.connect(self.invalidateColumnsFilter)

However, the docs have now listed invalidateColumnsFilter as deprecated and suggest to use beginFilterChange() and endFilterChange(Direction) instead. That's cool, but I feel a little weird about it since QAbstractItemModel doesn't have "dataAboutToChange" or "headerDataAboutToChange"-style signals to link up the beginFilter/endFilter stuff; it just has dataChanged / headerDataChanged.

So am I okay to connect headerDataChanged() to a method in my proxy model that then calls both the begin/endFilterChange() methods? This feels out-of-order.

self.sourceModel().headerDataChanged.connect(self.binColumnDataChanged)

@QtCore.Slot(QtCore.Qt.Orientation, int, int)
def binColumnDataChanged(self, orientation:QtCore.Qt.Orientation, first:int, last:int):
	self.beginFilterChange()
	self.endFilterChange(QtCore.QSortFilterProxyModel.Direction.Columns)