define source in items own kv files. implement basic gps permissions

forestmapview.kv

@@ -1,6 +1,7 @@
 #:import MapView kivy_garden.mapview.MapView
 #:import GpsBlinker gpsblinker.GpsBlinker
 #:include gpsblinker.kv
+#:include treemarker.kv
 
 <ForestMapView>:
     lat: 42.131331

forestmapview.py

@@ -41,7 +41,7 @@ class ForestMapView(MapView):
         # Create TreeMarker
         name = tree[0]
         lat, lon = tree[1], tree[2]
-        treemarker = TreeMarker(lat=lat, lon=lon, source='assets/images/markers/tree.png')
+        treemarker = TreeMarker(lat=lat, lon=lon)
         treemarker.tree_data = treemarker
         
         # Add TreeMarker to the map

gpshelper.py

@@ -1,12 +1,66 @@
 from kivy.app import App
+from kivy.utils import platform
+from kivymd.uix.dialog import MDDialog
 
 class GpsHelper():
+    has_centered_map = False
+
     def run(self):
         # Start blinking the GpsBlinker
         
         # Get a reference to GpsBlinker, then call blink()
-        #gps_blinker = App.get_running_app().root.ids.mapview.ids.blinker
+        #gps_blinker = App.get_running_app().root.ids.forestmapview.ids.blinker
         #gps_blinker.blink()
         
-        # Request permission on Android
-        pass
+        # Request permissions on Android
+        if platform == 'android':
+            from android.permissions import Permission, request_permissions
+            def callback(permission, results):
+                if all([res for res in results]):
+                    print("Got all permissions")
+                    from plyer import gps
+                    gps.configure(on_location=self.update_blinker_position,
+                                  on_status=self.on_auth_status)
+                    gps.start(minTime=1000, minDistance=0)
+                else:
+                    print("Did not get all permissions")
+
+            request_permissions([Permission.ACCESS_COARSE_LOCATION,
+                                 Permission.ACCESS_FINE_LOCATION], callback)
+
+        # Configure GPS
+        if platform == 'ios':
+            from plyer import gps
+            gps.configure(on_location=self.update_blinker_position,
+                          on_status=self.on_auth_status)
+            gps.start(minTime=1000, minDistance=0)
+
+
+    def update_blinker_position(self, *args, **kwargs):
+        my_lat = kwargs['lat']
+        my_lon = kwargs['lon']
+        print("GPS POSITION", my_lat, my_lon)
+        # Update GpsBlinker position
+        gps_blinker = App.get_running_app().root.ids.mapview.ids.blinker
+        gps_blinker.lat = my_lat
+        gps_blinker.lon = my_lon
+
+        # Center map on gps
+        if not self.has_centered_map:
+            map = App.get_running_app().root.ids.mapview
+            map.center_on(my_lat, my_lon)
+            self.has_centered_map = True
+
+
+    def on_auth_status(self, general_status, status_message):
+        if general_status == 'provider-enabled':
+            pass
+        else:
+            self.open_gps_access_popup()
+
+    def open_gps_access_popup(self):
+        dialog = MDDialog(title="GPS Error", text="You need to enable GPS access for the app to function properly")
+        dialog.size_hint = [.8, .8]
+        dialog.pos_hint = {'center_x': .5, 'center_y': .5}
+        dialog.open()
+

main.kv

@@ -2,4 +2,4 @@
 
 ForestMapView:
     orientation: 'vertical'
-    id: mapview
+    id: forestmapview