Add app to show location of others using the app

apps/shownearby/ChangeLog

@@ -0,0 +1 @@
+0.01: New App!

apps/shownearby/app-icon.js

@@ -0,0 +1 @@
+require("heatshrink").decompress(atob("mEw4UA///rkcr+W8H5Ie8/4AKIgf//gLIh5XBERILBEhAuBGA0BqtUEIMP+ALEqoABBY8FqtlBZEV0ulBYPABYkBq2WBYN/+A7Egtqq2lyt/KYsF1VaBZEWBYdfO4pRCAANXR4oLKgNq1Nq0upKgP0BYuq0uqBY4JBBYV/6hSEBYZIBqoLJrQLJQoILEKYgACBZ4jGsoLJyoLKAAJrIAIOUQZGWBYtaTYQLCqizIAANQBZ7jDAQOpoALDfYYCCBQYLBtVWa4NaIwZICq2WBYNpFwgABitlOgOVFwipDsuVUoYAEKI4xEqp0EAHg="))

apps/shownearby/app.js

@@ -0,0 +1,86 @@
+var m = require("openstmap");
+var HASWIDGETS = true;
+var y1,y2;
+var fix = {};
+
+function redraw() {
+  g.setClipRect(0,y1,g.getWidth()-1,y2);
+  m.draw();
+  if (fix.fix) drawMarker(fix,"#f00");
+  if (WIDGETS["gpsrec"] && WIDGETS["gpsrec"].plotTrack) {
+    g.flip(); // force immediate draw on double-buffered screens - track will update later
+    g.setColor(0.75,0.2,0);
+    WIDGETS["gpsrec"].plotTrack(m);
+  }
+  g.setClipRect(0,0,g.getWidth()-1,g.getHeight()-1);
+}
+
+function drawMarker(pt, col) {
+  var p = m.latLonToXY(pt.lat, pt.lon);
+  g.setColor(col).fillRect(p.x-3, p.y-3, p.x+3, p.y+3);
+}
+
+var fix;
+Bangle.on('GPS',function(f) {
+  fix=f;
+  g.reset().clearRect(0,y1,g.getWidth()-1,y1+8).setFont("6x8").setFontAlign(0,0);
+  var txt = fix.satellites+" satellites";
+  if (!fix.fix)
+    txt += " - NO FIX";
+  g.drawString(txt,g.getWidth()/2,y1 + 4);
+  if (fix.fix) drawMarker(fix,"#f00");
+  if (fix.fix) {
+    var fdata = new Float32Array([f.lat,f.lon]);
+    NRF.setAdvertising({},{
+      phy:"coded",
+      connectable:false,
+      scannable:false,
+      showName:false,
+      manufacturer:0x0590,
+      manufacturerData:fdata.buffer
+    });
+  }
+});
+Bangle.setGPSPower(1, "app");
+
+if (HASWIDGETS) {
+  Bangle.loadWidgets();
+  Bangle.drawWidgets();
+  y1 = 24;
+  var hasBottomRow = Object.keys(WIDGETS).some(w=>WIDGETS[w].area[0]=="b");
+  y2 = g.getHeight() - (hasBottomRow ? 24 : 1);
+} else {
+  y1=0;
+  y2=g.getHeight()-1;
+}
+
+redraw();
+
+function recenter() {
+  if (!fix.fix) return;
+  m.lat = fix.lat;
+  m.lon = fix.lon;
+  redraw();
+}
+
+setWatch(recenter, global.BTN2?BTN2:BTN1, {repeat:true});
+
+var hasScrolled = false;
+Bangle.on('drag',e=>{
+  if (e.b) {
+    g.setClipRect(0,y1,g.getWidth()-1,y2);
+    g.scroll(e.dx,e.dy);
+    m.scroll(e.dx,e.dy);
+    g.setClipRect(0,0,g.getWidth()-1,g.getHeight()-1);
+    hasScrolled = true;
+  } else if (hasScrolled) {
+    hasScrolled = false;
+    redraw();
+  }
+});
+
+// Start scanning
+NRF.setScan(function(d) {
+  var latLon = new Float32Array(d.manufacturerData);
+  drawMarker({lat:latLon[0], lon:latLon[1]},"#0f0");
+},{phy:"coded",filters: [{ manufacturerData:{0x0590:{}} }]});

apps/shownearby/metadata.json

@@ -0,0 +1,14 @@
+{
+  "id": "shownearby",
+  "name": "Show Nearby",
+  "version": "0.01",
+  "description": "Uses BLE long range advertising, advertises current location and shows the position of other watches running the app (Needs firmware 2v14.63 or later and Open Street Map installed)",
+  "icon": "app.png",
+  "tags": "outdoors,gps",
+  "supports": ["BANGLEJS2"],
+  "dependencies" : { "openstmap":"app" },
+  "storage": [
+    {"name":"shownearby.app.js","url":"app.js"},
+    {"name":"shownearby.img","url":"app-icon.js","evaluate":true}
+  ]
+}