widgps: add intervall to update the widget

Periodically update so the always on display does show current GPS fix

apps/widgps/ChangeLog

@@ -3,3 +3,4 @@
 0.03: Fix positioning
 0.04: Show GPS fix status
 0.05: Don't poll for GPS status, override setGPSPower handler (fix #1456)
+0.06: Periodically update so the always on display does show current GPS fix

apps/widgps/metadata.json

@@ -1,7 +1,7 @@
 {
   "id": "widgps",
   "name": "GPS Widget",
-  "version": "0.05",
+  "version": "0.06",
   "description": "Tiny widget to show the power and fix status of the GPS",
   "icon": "widget.png",
   "type": "widget",

apps/widgps/widget.js

@@ -1,9 +1,19 @@
 (function(){
+  var interval;
+
   // override setGPSPower so we know if GPS is on or off
   var oldSetGPSPower = Bangle.setGPSPower;
   Bangle.setGPSPower = function(on,id) {
     var isGPSon = oldSetGPSPower(on,id);
     WIDGETS.gps.draw();
+    if (isGPSon && interval === undefined) {
+      interval = setInterval(function() {
+        WIDGETS.gps.draw(WIDGETS.gps);
+      }, 10*1000); // update every 10 seconds to show gps fix/no fix
+    } else if (!isGPSon && interval !== undefined) {
+      clearInterval(interval);
+      interval = undefined;
+    }
     return isGPSon;
   }