Pinch zoom in fl_charts - flutter

Question

I am just new to Flutter and mobile dev overall, so I've tried to create some Line Chart using fl_chart and there is a problem, which I don't understand why it doesn't work.
So, here is a simple widget, which has a chart and I want to add some interactions to it like a horizontal scroll (it works), reset the state with a double-tap (works as well), and the ability to zoom in to the chart (doesn't work).
Gesture Detector has onScaleUpdate, which I thought it's what I need, but when I try to pinch-zoom in or out, the callback is not being called and I can't change the chart. A lot of things were tried, in order to make it work, but it was unsuccessful.
import 'package:fl_chart/fl_chart.dart';
import 'package:flutter/material.dart';
// ...
class FlChartState extends State<FlChart> {
List<LineChartBarData> mainChartData = [];
double minX = 0;
double maxX = 0;
double resultsLength = 60;
#override
void initState() {
_mainBarDataCalculation(); // Method that prepares the data for the chart
super.initState();
}
#override
Widget build(BuildContext context) {
return GestureDetector(
onDoubleTap: () {
setState(() {
minX = 0;
maxX = resultsLength;
});
},
onScaleUpdate: (scaleUpd) {
// doesn't trigger
},
onHorizontalDragUpdate: (dragUpdDet) {
setState(() {
double primDelta = dragUpdDet.primaryDelta ?? 0.0;
if (primDelta != 0) {
if (primDelta.isNegative) {
if (maxX < resultsLength) {
minX += maxX * 0.005;
maxX += maxX * 0.005;
}
} else {
if (minX > 0) {
minX -= maxX * 0.005;
maxX -= maxX * 0.005;
}
}
}
});
},
child: LineChart(_createLineChartDataWidget()),
);
}
// ...
}
Is there something wrong?