switch dark and bright themes, stub

flockompass.kv

@@ -44,13 +44,11 @@
                 centermark.lon = mapview.lon
                 selfmark.lat = app.gps_data.get('lat', 0)
                 selfmark.lon = app.gps_data.get('lon', 0)
-
             MapMarker:
                 source: 'assets/marker_self.png'
                 id: selfmark
                 anchor_x: 0.5
                 anchor_y: 0
-
             MapMarker:
                 source: 'assets/marker_dest.png'
                 id: centermark
@@ -88,11 +86,12 @@
     FloatLayout:
         canvas:
             Color:
-                rgba: rgba("#336645")
+                rgba: rgba(app.theme['bgcolor'])
             Rectangle:
                 size: self.size
         Image:
-            source: 'assets/needle_dark.png'
+            id: needle
+            source: app.theme['needle']
             pos_hint: {"center_x": 0.5, "center_y": 0.7}
             canvas.before:
                 PushMatrix
@@ -119,7 +118,7 @@
             pos_hint: {"center_x": 0.5, "center_y": 0.7}
             size_hint: 1, 1
         IconButton:
-            source: 'assets/to_map_dark.png'
+            source: app.theme['to_map']
             pos_hint: {"center_x": 0.1, "center_y": 0.95}
             size_hint: 0.2, 0.2
             on_press: root.manager.current = 'map';
@@ -153,6 +152,7 @@
             active: True
             background_color: rgba("#f3e8d2")
             color: rgba("#346645")
+            on_active: app.set_dark_theme(self.active)
         BackgroundLabel:
             text: "Compas smoothing"
             background_color: rgba("#f3e8d2")

main.py

@@ -62,6 +62,11 @@ class FlockompassApp(App):
     dashboard_dest = StringProperty("")
     dashboard_flock = StringProperty("")
 
+    theme = DictProperty(
+        {'needle': "assets/needle_dark.png",
+         'to_map': "assets/to_map_dark.png",
+         'bgcolor': "#336645"})
+
     def dump(self, dt):
         print(dt, self.gps_data, self.session_data)
 
@@ -109,6 +114,17 @@ class FlockompassApp(App):
         self.ms.ids.mapview.center_on(self.session_data['dest_lat'],
                                       self.session_data['dest_lon'])
 
+
+    def set_dark_theme(self, active):
+        if active:
+            self.theme = {'needle': "assets/needle_dark.png",
+                          'to_map': "assets/to_map_dark.png",
+                          'bgcolor': "#336645"}
+        else:
+            self.theme = {'needle': "assets/needle_bright.png",
+                          'to_map': "assets/to_map_bright.png",
+                          'bgcolor': "#f3e8d2"}
+
     def request_android_permissions(self):
         from android.permissions import request_permissions, Permission
 
@@ -247,22 +263,25 @@ class FlockompassApp(App):
         # setup app screens
         screen_manager = ScreenManager(transition=RiseInTransition())
 
+        # map screen
         self.ms = MapScreen(name='map')
         screen_manager.add_widget(self.ms)
 
-        self.cs = CompassScreen(name='compass')
-        self.cs._anim = None
-        self.cs._anim1 = None
-
-        screen_manager.add_widget(self.cs)
-
+        # settings screen
         self.ss = SettingsScreen(name='settings')
         screen_manager.add_widget(self.ss)
 
 
+        # compass screen
+
         # smoothing vars for compass
         self.last_angle = 0
 
+        self.cs = CompassScreen(name='compass')
+        self.cs._anim = None
+        self.cs._anim1 = None
+        screen_manager.add_widget(self.cs)
+
         #Clock.schedule_interval(self.dump, 2.0)
 
         return screen_manager