+#ifdef APPCORE_WATCH_AVAILABLE
+ /**
+ * Invoked at every second
+ */
+ virtual void OnTimeTick(WatchTime&) {}
+
+ /**
+ * Invoked at every second in ambient mode
+ */
+ virtual void OnAmbientTick(WatchTime&) {}
+
+ /**
+ * Invoked when the device enters or exits ambient mode
+ */
+ virtual void OnAmbientChanged(bool ambient) {}
+#endif
+