center map on current location

flockompass.kv

@@ -18,6 +18,10 @@
                 ActionPrevious:
                     title: 'Social Cycling'
                     with_previous: False
+                ActionButton:
+                    important: False
+                    text: 'go to current loc'
+                    on_press: app.center_map_on_gps()                    
                 ActionButton:
                     important: True
                     text: 'we ride together'

main.py

@@ -82,8 +82,17 @@ class FlockompassApp(App):
             self.fbearing = self.needle_angle + degrees(self.fbearing)
             self.fbearing = (self.fbearing + 360) % 360
 
+    def center_map_on_gps(self):
+        self.ms.ids.mapview.center_on(self.gps_data['lat'],
+                                      self.gps_data['lon'])
+
+
     def get_field(self, dt):
-        needle_angle = 7
+        """
+        get magnetic field for compass
+        """
+
+        needle_angle = 0
         if self.cs.facade.field != (None, None, None):
             self.x_calib, self.y_calib, self.z_calib = self.cs.facade.field
             x, y, z = self.cs.facade.field
@@ -102,13 +111,13 @@ class FlockompassApp(App):
         if self.cs._anim:
             self.cs._anim.stop(self)
         self.cs._anim = Animation(needle_angle=needle_angle,
-                                  d=0.2,
-                                  t='out_quad')
+                                  d=0.1,
+                                  t='out_elastic')
         self.cs._anim.start(self)
 
     def compass_enable(self):
         self.cs.facade.enable()
-        Clock.schedule_interval(self.get_field, 1 / 5.0)
+        Clock.schedule_interval(self.get_field, 1 / 10.0)
 
     def compass_disable(self):
         self.cs.facade.disable()