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add subdomain support #8

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Merged
johnpryan merged 2 commits into from
Mar 2, 2018
Merged

add subdomain support #8

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ec5db81
add subdomain support
johnpryan Feb 21, 2018
a6e95ec
add subdomain support to example
johnpryan Feb 21, 2018
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12 changes: 12 additions & 0 deletions flutter_map/lib/src/layer/tile_layer.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -17,14 +17,17 @@ class TileLayerOptions extends LayerOptions {
final double maxZoom;
final bool zoomReverse;
final double zoomOffset;
final List<String> subdomains;
Map<String, String> additionalOptions;

TileLayerOptions({
this.urlTemplate,
this.tileSize = 256.0,
this.maxZoom = 18.0,
this.zoomReverse = false,
this.zoomOffset = 0.0,
this.additionalOptions = const <String, String>{},
this.subdomains = const <String>[],
});
}

Expand Down Expand Up @@ -64,6 +67,7 @@ class _TileLayerState extends State<TileLayer> {
'x': coords.x.round().toString(),
'y': coords.y.round().toString(),
'z': coords.z.round().toString(),
's': _getSubdomain(coords)
};
var allOpts = new Map.from(data)..addAll(this.options.additionalOptions);
return util.template(this.options.urlTemplate, allOpts);
Expand Down Expand Up @@ -355,6 +359,14 @@ class _TileLayerState extends State<TileLayer> {
var level = _levels[coords.z];
return coords.scaleBy(this.getTileSize()) - level.origin;
}

String _getSubdomain(Coords coords) {
if (options.subdomains.isEmpty) {
return "";
}
var index = (coords.x + coords.y).round() % this.options.subdomains.length;
return options.subdomains[index];
}
}

class Tile {
Expand Down
3 changes: 2 additions & 1 deletion flutter_map_example/lib/main.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -74,7 +74,8 @@ class HomePage extends StatelessWidget {
layers: [
new TileLayerOptions(
urlTemplate:
"https://tile.openstreetmap.org/{z}/{x}/{y}.png",
"https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png",
subdomains: ['a','b','c']
),
new MarkerLayerOptions(markers: markers)
],
Expand Down