dynamicaly set mapview lat,lon

flockompass.kv

@@ -20,10 +20,8 @@
 
         MapView:
             id: mapview
-            lat: 28.89335172
-            lon: 76.59449171
             zoom: 15
-
+            
             on_map_relocated: centermark.lat = mapview.lat; centermark.lon = mapview.lon
 
             MapMarker:
@@ -31,9 +29,6 @@
                 id: centermark
                 anchor_x: 0.2
                 anchor_y: 0.3
-                lat: 28.89335172
-                lon: 76.59449171
-
 
 
 <CompassScreen>:

main.py

@@ -12,15 +12,16 @@ from kivy_garden.mapview import MapView
 from kivy.vector import Vector
 from kivy.animation import Animation
 from math import floor
+import random
+
+#from LatLon23 import LatLon, Latitude, Longitude
 
 
 class MapScreen(Screen):
-    hue = NumericProperty(0)
-    mapview = MapView(zoom=11, lat=50.6394, lon=3.057)
-
+    mapview = MapView()
+    
 
 class CompassScreen(Screen):
-    hue = NumericProperty(0)
     x_calib = NumericProperty(0)
     y_calib = NumericProperty(0)
     z_calib = NumericProperty(0)
@@ -31,7 +32,7 @@ class CompassScreen(Screen):
 
     def enable(self):
         self.facade.enable()
-        Clock.schedule_interval(self.get_field, 1 / 20.)
+        Clock.schedule_interval(self.get_field, 1 / 5.)
 
     def disable(self):
         self.facade.disable()
@@ -76,10 +77,22 @@ class CompassScreen(Screen):
     @mainthread
     def on_location(self, **kwargs):
         print('aguas on location')
-        print(kwargs)
+        # print(kwargs)
+        
+        # p = LatLon(Latitude(kwargs['lat']),
+        #            Longitude(kwargs['lon']))
+
+        # destination_point = LatLon(Latitude(28.89335172),
+        #                            Longitude(76.59449171))
+        
         self.gps_location = '\n'.join([
             '{}={}'.format(k, v) for k, v in kwargs.items()])
+#        self.gps_location += str(p.heading_initial(destination_point))
 
+# bearing = atan2(sin(long2-long1)*cos(lat2), cos(lat1)*sin(lat2)-sin(lat1)*cos(lat2)*cos(long2-long1))
+#     bearing = degrees(bearing)
+#     bearing = (bearing + 360) % 360
+# https://stackoverflow.com/questions/4913349/haversine-formula-in-python-bearing-and-distance-between-two-gps-points#4913653
     @mainthread
     def on_status(self, stype, status):
         print('aguas on status')
@@ -90,6 +103,22 @@ class CompassScreen(Screen):
 
 class FlockompassApp(App):
 
+    lat = 19.3419
+    lon = -99.1499
+
+    def move_around(self, t):
+        self.lat += random.uniform(-0.01,0.01)
+        self.lon += random.uniform(-0.01,0.01)        
+
+        self.ms.ids.mapview.center_on(self.lat, self.lon)
+
+        # where the marker's at
+        print(
+            self.ms.ids.centermark.lat,
+            self.ms.ids.centermark.lon
+            )
+
+    
     def request_android_permissions(self):
         from android.permissions import request_permissions, Permission
 
@@ -106,9 +135,13 @@ class FlockompassApp(App):
     def build(self):
 
         root = ScreenManager(transition=RiseInTransition())
-        root.add_widget(MapScreen(name='map'))
+        self.ms = MapScreen(name='map')
+        root.add_widget(self.ms)
+
+        
         cs = CompassScreen(name='compass')
         cs._anim = None
+        cs.p = None
         
         try:
             gps.configure(on_location=cs.on_location,
@@ -122,8 +155,12 @@ class FlockompassApp(App):
             print("gps.py: Android detected. Requesting permissions")
             self.request_android_permissions()
 
+        
+
         root.add_widget(cs)
 
+        Clock.schedule_interval(self.move_around, 2.0)
+
         return root