add: setLastLake()

app/lib/server_requests/init_state.dart

@@ -3,13 +3,13 @@ import 'dart:async';
 import 'dart:convert';
 import 'dart:typed_data';
 import 'package:app/consts.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 
 import '../consts.dart';
 import '../data_classes.dart';
 import '../server_requests/fetch_markers.dart';
 import '../server_requests/fetch_relation.dart';
 
-
 /// initialiseState makes three requests to the server, one requesting
 /// measurements for the selected relation, the other requesting the relation,
 /// and the last requesting the list of all system lakes
@@ -31,6 +31,7 @@ Future<void> initialiseState(bool fetchSearchOptions) async {
       markerListFuture = fetchMeasurements().then((fetchResult) {
         List<Measurement> measurements = fetchResult.measurements;
         serverConnection = fetchResult.connected;
+        setLastLake();
 
         // Return measurements
         return measurements;
@@ -87,4 +88,9 @@ Future<void> initSearchOptions() async {
   } catch (e) {
     print("Failed to fetch lake names: $e");
   }
+}
+
+Future<void> setLastLake() async {
+  final prefs = await SharedPreferences.getInstance();
+  await prefs.setString('lastLake', selectedLake);
 }
\ No newline at end of file

app/lib/widgets/choropleth_map.dart

@@ -17,15 +17,15 @@ class ChoroplethMap extends StatefulWidget {
 
   final Uint8List relation;
   final List<Measurement> measurements;
-  final void Function(int _selectedIndex) onSelectionChanged;
+  final void Function(int selectedIndex) onSelectionChanged;
 
   @override
-  ChoroplethMapState createState() => ChoroplethMapState();
+  _ChoroplethMapState createState() => _ChoroplethMapState();
 }
 
-class ChoroplethMapState extends State<ChoroplethMap> {
-  int _selectedIndex = -1;            // Subdivision/map tile index
-  late MapShapeSource _dataSource;
+class _ChoroplethMapState extends State<ChoroplethMap> {
+  int selectedIndex = -1;            // Subdivision/map tile index
+  late MapShapeSource dataSource;
   late final MapZoomPanBehavior _zoomPanBehavior = MapZoomPanBehavior();
   final List<SubDiv> _subdivisions = <SubDiv>[];
 
@@ -40,7 +40,7 @@ class ChoroplethMapState extends State<ChoroplethMap> {
     };
 
     // Initialise data source
-    _dataSource = MapShapeSource.memory(
+    dataSource = MapShapeSource.memory(
       widget.relation,
       shapeDataField: 'sub_div_id',
       dataCount: _subdivisions.length,
@@ -88,17 +88,17 @@ class ChoroplethMapState extends State<ChoroplethMap> {
           child: SfMaps(
             layers: [
               MapShapeLayer(
-                source: _dataSource,
+                source: dataSource,
                 zoomPanBehavior: _zoomPanBehavior,
                 strokeColor: Colors.blue.shade50,
                 strokeWidth: 1,
                 // Shape selection
-                selectedIndex: _selectedIndex,
+                selectedIndex: selectedIndex,
                 onSelectionChanged: (int index) {
                   setState(() {
-                    _selectedIndex = index;
+                    selectedIndex = index;
                   });
-                  widget.onSelectionChanged(_selectedIndex);
+                  widget.onSelectionChanged(selectedIndex);
                 },
               ),
             ],

server/map_handler/get_measurements.py

@@ -138,7 +138,8 @@ def fill_remaining_subdivisions(lake_name: str, sub_div_ids: list):
                     'CenLatitude': center_lat,
                     'CenLongitude': center_lng,
                     'Accuracy': None,
-                    'Color': calculateColor(ice_stats[0]['Total ice (m)']),  # Calculate ice thickness based on total ice, temporary
+                    # Calculate ice thickness based on total ice, temporary
+                    'Color': calculateColor(ice_stats[0]['Total ice (m)']),
                     'IceStats': ice_stats,
                 }