Partial polling implementation

eu.ichibi.Lumos.json

@@ -5,11 +5,11 @@
     "sdk" : "org.gnome.Sdk",
     "command" : "lumos",
     "finish-args" : [
-        "--share=network",
         "--share=ipc",
         "--socket=fallback-x11",
         "--device=dri",
-        "--socket=wayland"
+        "--socket=wayland",
+        "--system-talk-name=net.hadess.SensorProxy"
     ],
     "cleanup" : [
         "/include",

src/meson.build

@@ -30,6 +30,7 @@ lumos_sources = [
   '__init__.py',
   'main.py',
   'window.py',
+  'sensors_polling_timer.py',
   'widgets/widgets_loader.py',
   'widgets/time_priority_page.py',
   'widgets/aperture_priority_page.py',

src/sensors_polling_timer.py

@@ -0,0 +1,43 @@
+from gi.repository import Gio, GLib
+from threading import Timer
+
+# window.py
+#
+# Copyright 2024 Daniele Verducci
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+
+# A timer for polling the light sensor via DBus.
+# Checks the sensor at a specific interval and runs a callback only when an update is detected.
+#
+# Usage:
+# Instantiate it, then call run(interval_in_seconds, callback_function)
+# To stop it, call cancel()
+class SensorsPollingTimer(Timer):
+	def run(self):
+		# Setup
+		bus = Gio.bus_get_sync(Gio.BusType.SYSTEM, None)
+		self.proxy = Gio.DBusProxy.new_sync(bus,Gio.DBusProxyFlags.NONE,None,'net.hadess.SensorProxy','/net/hadess/SensorProxy','org.freedesktop.DBus.Properties', None)
+		self.oldValue = None
+
+		# Loop
+		while not self.finished.wait(self.interval):
+			value = self.proxy.Get('(ss)', 'net.hadess.SensorProxy', 'LightLevel')
+			if (self.oldValue != value):
+				self.oldValue = value
+				self.function(value)    # Invoke callback
+

src/window.py

@@ -19,6 +19,7 @@
 
 from gi.repository import Adw
 from gi.repository import Gtk
+from .sensors_polling_timer import SensorsPollingTimer
 
 @Gtk.Template(resource_path='/eu/ichibi/Lumos/window.ui')
 class LumosWindow(Adw.ApplicationWindow):
@@ -28,3 +29,11 @@ class LumosWindow(Adw.ApplicationWindow):
 
     def __init__(self, **kwargs):
         super().__init__(**kwargs)
+
+        # Start polling sensors
+        self.sensorsPollingTimer = SensorsPollingTimer(1, self.onSensorRead)
+        self.sensorsPollingTimer.run()
+
+    def onSensorRead(self, value):
+        # Called when the light value changed
+	    print("Read {} lux".format(value))