[WIP] Turn device list into buttons

companion/app.py

 from kivy.app import App
+from kivy.logger import Logger
 from kivy.properties import ObjectProperty
+from kivy.uix.button import Button
 from kivy.uix.widget import Widget
 
 from bluetooth import MynitBluetooth
 
 class DeviceListWidget(Widget):
-    app = ObjectProperty()
+    device_buttons = None
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        self._devices_buttons_map = {}
+
+    def update_device_buttons(self, devices):
+        Logger.debug("Updating device buttons")
+        self._devices_buttons_map = devices
+
+        self.device_buttons.clear_widgets()
+        for label, device in self._devices_buttons_map.items():
+            Logger.debug("Adding button for %s" % label)
+            btn = Button(text=label)
+            self.device_buttons.add_widget(btn)
+
 
 class MynitCompanionApp(App):
     def __init__(self, *args, **kwargs):
@@ -14,7 +32,8 @@ class MynitCompanionApp(App):
         self._bluetooth = MynitBluetooth(self)
 
     def update_device_list(self, devices):
-        pass
+        self.widget.update_device_buttons({device.getAddress(): device for device in devices})
 
     def build(self):
-        return DeviceListWidget(app=self)
+        self.widget = DeviceListWidget()
+        return self.widget

companion/bluetooth.py

@@ -20,11 +20,12 @@ class MynitBluetooth(BluetoothDispatcher):
         self._characteristics = None, None
 
         Logger.info("Starting BLE scanning")
-        self.start_scan(filters=[ServiceUUIDFilter(_UART_SERVICE_UUID)])
+#        self.start_scan(filters=[ServiceUUIDFilter(_UART_SERVICE_UUID)])
+        self.start_scan()
 
     def on_device(self, device, rssi, advertisement):
         Logger.debug("BLE device discovered: %s" % device.getAddress())
-
+        self.stop_scan()
         if device not in self._available_devices:
             Logger.info("New BLE device discovered: %s" % device.getAddress())
             self._available_devices.add(device)

companion/mynitcompanion.kv

 #:kivy 1.0.9
 
 <DeviceListWidget>:
-    cols: 1
+    device_buttons: device_buttons
+
+    BoxLayout:
+        Label:
+            text: "Device List"
+
+        BoxLayout:
+            id: device_buttons
 
-    Label:
-        text: str(root.app._bluetooth._available_devices)