Initial version with "auto quit"

Quit the application after a user settable period of time based on a timeout value from the settings.

source/QuitTimer.mc

@@ -0,0 +1,56 @@
+//-----------------------------------------------------------------------------------
+//
+// Distributed under MIT Licence
+//   See https://github.com/house-of-abbey/GarminHomeAssistant/blob/main/LICENSE.
+//
+//-----------------------------------------------------------------------------------
+//
+// GarminHomeAssistant is a Garmin IQ application written in Monkey C and routinely
+// tested on a Venu 2 device. The source code is provided at:
+//            https://github.com/house-of-abbey/GarminHomeAssistant.
+//
+// J D Abbey & P A Abbey, 28 December 2022
+//
+//
+// Description:
+//
+// Quit the application after a period of inactivity in order to save the battery.
+//
+//-----------------------------------------------------------------------------------
+
+using Toybox.Lang;
+using Toybox.Timer;
+using Toybox.Application.Properties;
+using Toybox.WatchUi;
+
+class QuitTimer extends Timer.Timer {
+    private var api_timeout;
+    
+    function initialize() {
+        Timer.Timer.initialize();
+        // Timer needs delay in milliseconds.
+        api_timeout = (Properties.getValue("app_timeout") as Lang.Number) * 1000;
+    }
+
+    function exitApp() as Void {
+        if (Globals.scDebug) {
+            System.println("QuitTimer exitApp(): Exiting");
+        }
+         // This will exit the system cleanly from any point within an app.
+        System.exit();
+    }
+
+    function begin() {
+        if (api_timeout > 0) {
+            start(method(:exitApp), api_timeout, false);
+        }
+    }
+
+    function reset() {
+        if (Globals.scDebug) {
+            System.println("QuitTimer reset(): Restarted quit timer");
+        }
+        stop();
+        begin();
+    }
+}