show distance to destination, and icon

buildozer.spec

@@ -36,7 +36,7 @@ version = 0.1
 
 # (list) Application requirements
 # comma separated e.g. requirements = sqlite3,kivy
-requirements = hostpython3, python3, kivy, plyer, android, mapview, requests, urllib3, chardet, idna
+requirements = hostpython3, python3, kivy, plyer, android, mapview, requests, urllib3, chardet, idna, geopy, geographiclib
 
 # (str) Custom source folders for requirements
 # Sets custom source for any requirements with recipes
@@ -49,7 +49,7 @@ requirements = hostpython3, python3, kivy, plyer, android, mapview, requests, ur
 presplash.filename = ./presplash.png
 
 # (str) Icon of the application
-#icon.filename = %(source.dir)s/data/icon.png
+icon.filename = ./icon.png
 
 # (str) Supported orientation (one of landscape, sensorLandscape, portrait or all)
 orientation = portrait

flockompass.kv

@@ -58,13 +58,18 @@
                     important: True
                     text: 'set destination'
                     on_press: root.manager.current = 'map';
-
         FloatLayout:
             canvas:
                 Color:
                     rgb: .9, .9, .9
                 Rectangle:
                     size: self.size
+            Label:
+                text: app.dest_distance
+                color: 0, 0, 0.3, 1
+                size_hint: 0.5, 0.1
+                pos: 0, 0.1
+                font_size: '40sp'
             Image:
                 source: 'needle.png'
                 canvas.before:

main.py

@@ -1,7 +1,7 @@
 from plyer import gps
 from kivy.app import App
 from kivy.clock import Clock
-from kivy.properties import DictProperty, NumericProperty
+from kivy.properties import DictProperty, NumericProperty, StringProperty
 from kivy.clock import mainthread
 from kivy.utils import platform
 from kivy_garden.mapview import MapView
@@ -12,6 +12,8 @@ from kivy.vector import Vector
 from kivy.animation import Animation
 from math import atan2, sin, cos, degrees, floor
 
+from geopy.distance import geodesic
+
 
 class MapScreen(Screen):
     pass
@@ -28,6 +30,8 @@ class FlockompassApp(App):
     needle_angle = NumericProperty(0)
     fbearing = NumericProperty(0)
 
+    dest_distance = StringProperty("")    
+
     def dump(self, dt):
         print(dt, self.gps_data, self.session_data)
 
@@ -60,6 +64,7 @@ class FlockompassApp(App):
     @mainthread
     def on_location(self, **kwargs):
         self.gps_data = kwargs
+        self.dump(1)
         
         if ('dest_lat' not in self.session_data
             and
@@ -82,6 +87,11 @@ class FlockompassApp(App):
             self.fbearing = self.needle_angle - degrees(self.fbearing)
             self.fbearing = (self.fbearing + 360) % 360
 
+            self.dest_distance = "D: %0.1f km" % geodesic(
+                (self.gps_data['lat'], self.gps_data['lon']),
+                (self.session_data['dest_lat'], self.session_data['dest_lon'])).kilometers
+            print(self.dest_distance)
+            
     def center_map_on_gps(self):
         self.ms.ids.mapview.center_on(self.gps_data['lat'],
                                       self.gps_data['lon'])
@@ -96,7 +106,7 @@ class FlockompassApp(App):
         if self.cs.facade.field != (None, None, None):
             x, y, z = self.cs.facade.field
             
-            smoothingFactor = 0.9
+            smoothingFactor = 0.5
             angle = atan2(y, x)
             self.last_angle = smoothingFactor * self.last_angle  + (1 - smoothingFactor) * angle