Change setting on xsession switch

tuxedo-touchpad-switch.cpp

@@ -145,6 +145,25 @@ void send_events_handler(GSettings *settings, const char* key, __attribute__((un
     }
 }
 
+void  properties_changed_handler(__attribute__((unused)) GDBusProxy *proxy, GVariant *changed_properties, __attribute__((unused)) GStrv invalidated_properties, __attribute__((unused)) gpointer user_data) {
+    if (g_variant_is_of_type(changed_properties, G_VARIANT_TYPE_VARDICT)) {
+        GVariantDict changed_properties_dict;
+        gboolean sessionIsActive;
+
+        g_variant_dict_init (&changed_properties_dict, changed_properties);
+        if (g_variant_dict_lookup (&changed_properties_dict, "SessionIsActive", "b", &sessionIsActive)) {
+            if (sessionIsActive) {
+                GSettings *touchpad_settings = g_settings_new("org.gnome.desktop.peripherals.touchpad");
+                if (!touchpad_settings) {
+                    cerr << "properties_changed_handler(...): g_settings_new(...) failed." << endl;
+                    return;
+                }
+                send_events_handler(touchpad_settings, "send-events", NULL);
+            }
+        }
+    }
+}
+
 int main() {
     // Currently this programm works on desktop environments using Gnome settings only (Gnome/Budgie/Cinnamon/etc.).
     // A KDE configuration version will be developt once this works flawless.
@@ -158,26 +177,43 @@ int main() {
         return EXIT_FAILURE;
     }
     
+    
     // sync on config change
     if (g_signal_connect(touchpad_settings, "changed::send-events", G_CALLBACK(send_events_handler), NULL) < 1) {
         cerr << "main(...): g_signal_connect(...) failed." << endl;
         return EXIT_FAILURE;
     }
     
+    
     // sync on start
     send_events_handler(touchpad_settings, "send-events", NULL);
     
-    // TODO sync on xsession change
+    
+    // sync on xsession change
+    GDBusProxy *session_manager_properties = g_dbus_proxy_new_for_bus_sync(G_BUS_TYPE_SESSION, G_DBUS_PROXY_FLAGS_NONE, NULL, "org.gnome.SessionManager", "/org/gnome/SessionManager", "org.gnome.SessionManager", NULL, NULL);
+    if (session_manager_properties == NULL) {
+        cerr << "main(...): g_dbus_proxy_new_for_bus_sync(...) failed." << endl;
+        return EXIT_FAILURE;
+    }
+    
+    if (g_signal_connect(session_manager_properties, "g-properties-changed", G_CALLBACK(properties_changed_handler), NULL) < 1) {
+        cerr << "main(...): g_signal_connect(...) failed." << endl;
+        g_object_unref(session_manager_properties);
+        return EXIT_FAILURE;
+    }
+    
     
     // start empty glib mainloop, required for glib signals to be catched
     GMainLoop *app = g_main_loop_new(NULL, TRUE);
     if (!app) {
         cerr << "main(...): g_main_loop_new(...) failed." << endl;
+        g_object_unref(session_manager_properties);
         return EXIT_FAILURE;
     }
     
     g_main_loop_run(app);
     // g_main_loop_run should not return
     cerr << "main(...): g_main_loop_run(...) failed." << endl;
+    g_object_unref(session_manager_properties);
     return EXIT_FAILURE;
 }