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sorta works for tiles from osm and cams from overpass

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This commit is contained in:
stopflock
2025-08-09 17:38:33 -05:00
parent 7f91d5aec4
commit 385f6f3683
6 changed files with 78 additions and 59 deletions
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lib/widgets/map_view.dart
+26 -58
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@@ -19,61 +19,7 @@ import '../services/offline_area_service.dart';
import '../models/osm_camera_node.dart';
import 'debouncer.dart';
import 'camera_tag_sheet.dart';
class DataProviderTileProvider extends TileProvider {
@override
ImageProvider getImage(TileCoordinates coords, TileLayer options) {
print('[DataProviderTileProvider] getImage called for \\${coords.z}/\\${coords.x}/\\${coords.y}');
return DataProviderImage(coords, options);
}
}
class DataProviderImage extends ImageProvider<DataProviderImage> {
final TileCoordinates coords;
final TileLayer options;
DataProviderImage(this.coords, this.options);
@override
Future<DataProviderImage> obtainKey(ImageConfiguration configuration) {
return SynchronousFuture<DataProviderImage>(this);
}
@override
ImageStreamCompleter load(
DataProviderImage key,
Future<ui.Codec> Function(Uint8List, {int? cacheWidth, int? cacheHeight}) decode) {
return MultiFrameImageStreamCompleter(
codec: _loadAsync(key, decode),
scale: 1.0,
);
}
Future<ui.Codec> _loadAsync(DataProviderImage key, Future<ui.Codec> Function(Uint8List, {int? cacheWidth, int? cacheHeight}) decode) async {
final z = key.coords.z;
final x = key.coords.x;
final y = key.coords.y;
print('[_loadAsync] Called for $z/$x/$y');
try {
final bytes = await MapDataProvider().getTile(z: z, x: x, y: y);
print('[_loadAsync] Got bytes for $z/$x/$y: length=\\${bytes.length}');
if (bytes.isEmpty) throw Exception("Empty image bytes for $z/$x/$y");
return await decode(Uint8List.fromList(bytes));
} catch (e) {
// Optionally: provide an error tile
print('[MapView] Failed to load OSM tile for $z/$x/$y: $e');
// Return a blank pixel or a fallback error tile of your design
return await decode(Uint8List.fromList(_transparentPng));
}
}
// A tiny 1x1 transparent PNG
static const List<int> _transparentPng = [
137,80,78,71,13,10,26,10,0,0,0,13,73,72,68,82,
0,0,0,1,0,0,0,1,8,6,0,0,0,31,21,196,137,
0,0,0,10,73,68,65,84,8,153,99,0,1,0,0,5,
0,1,13,10,42,100,0,0,0,0,73,69,78,68,174,66,
96,130];
}
import 'tile_provider_with_cache.dart';
// --- Smart marker widget for camera with single/double tap distinction
class _CameraMapMarker extends StatefulWidget {
@@ -292,10 +238,32 @@ class _MapViewState extends State<MapView> {
),
children: [
TileLayer(
tileProvider: DataProviderTileProvider(),
urlTemplate: 'unused-{z}-{x}-{y}', // Required by flutter_map for tile addressing
tileProvider: TileProviderWithCache(
onTileCacheUpdated: () { if (mounted) setState(() {}); },
),
urlTemplate: 'unused-{z}-{x}-{y}',
tileSize: 256,
// Any other TileLayer customization as needed
tileBuilder: (ctx, tileWidget, tileImage) {
try {
final str = tileImage.toString();
final regex = RegExp(r'TileCoordinate\((\d+), (\d+), (\d+)\)');
final match = regex.firstMatch(str);
if (match != null) {
final x = match.group(1);
final y = match.group(2);
final z = match.group(3);
final key = '$z/$x/$y';
final bytes = TileProviderWithCache.tileCache[key];
if (bytes != null && bytes.isNotEmpty) {
return Image.memory(bytes, gaplessPlayback: true, fit: BoxFit.cover);
}
}
return Image.asset('assets/transparent_1x1.png', gaplessPlayback: true, fit: BoxFit.cover);
} catch (e) {
print('tileBuilder error: $e for tileImage: ${tileImage.toString()}');
return tileWidget;
}
}
),
PolygonLayer(polygons: overlays),
MarkerLayer(markers: markers),