Upgrade to flutter_map v7

[bishen]

Do you have any plans to support v7

[ibrierley]

Yes, just not in a rush atm as I think v7 needs to settle first. However, if anyone has a compelling reason, I'll try and make it happen sooner.

[manlyman29]

@ibrierley It seems that v7 does not have a major breaking change. Personally I hope to see the upgrade happen on this library sooner :)

[ibrierley]

Heya, no there's not a breaking change, but I think there is an issue on latest release so I wouldn't recommend updating yet, this issue highlights the problem with polygons vanishing.. fleaflet/flutter_map#1921 but if anyone needs a v7 version, I'll do an update.

[Henk-Keijzer]

It seems that the issue mentioned is solved in flutter_map 7.0.2. I would really appreciate an update of this package...

[ibrierley]

Ok, weird, I think something has gone astray with some flutter_map change (maybe), I can't get the polygon example to fill the poly. I can see there has been a change to isFilled, but I don't think that's related, as it doesn't draw borders if I include those in the poly params.

[ibrierley]

I think the problem is that in flutter_maps polygon.dart is has this line...

LatLngBounds get boundingBox =>
      _boundingBox ??= LatLngBounds.fromPoints(points);

so it's caching the bounding box now. As the poly from an editor starts with nothing, I don't think that will get updated, so I'm assuming it just gets culled for optimisation every time...

I think it can be worked around by creating a new Poly every time, so it's never cached...so the code would look something like the following code. I'm not sure if I like this or not, as on the one hand, it cuts out the normal flutter flow (I'm a bit out of touch), on the other, it's an editor so performance not such an issue here, and also maybe it's more correct...not quite sure.

Any thoughts, let me know.

final polyPoints = <LatLng>[];
  
  @override
  void initState() {
    super.initState();

    polyEditor = PolyEditor(
      addClosePathMarker: true,
      points: polyPoints,
      pointIcon: const Icon(Icons.crop_square, size: 23),
      intermediateIcon: const Icon(Icons.lens, size: 15, color: Colors.grey),
      callbackRefresh: (LatLng? _) => {setState(() {})},
    );
  }

  @override
  Widget build(BuildContext context) {

    final polygons = <Polygon>[];
    final testPolygon = Polygon(
      label: 'Label!',
      color: Colors.deepOrange,
      borderColor: Colors.red,
      borderStrokeWidth: 4,
      points: polyPoints,
    );
    polygons.add(testPolygon);

    return Scaffold(

[ibrierley]

I have raised an issue at fleaflet/flutter_map#1932 just to get some thoughts

[eidolonFIRE]

Adding my interest to v7 support... I'm eager for v7.

[moovida]

I also would love to see a v7. :-)

[moovida]

@ibrierley , how did you even get to that part? I am trying to give it a look but it fails before, when trying to create an initial LatLngBounds with no points, which is not accepted:

  factory LatLngBounds.fromPoints(List<LatLng> points) {
    assert(
      points.isNotEmpty,
      'LatLngBounds cannot be created with an empty List of LatLng',
    );

Is there something I am missing?