BangleApps/apps/widgps/widget.js

(function(){
  let settings = require("Storage").readJSON("widgps.json", 1) || {
    crossIcon: true
  };

  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();
    return isGPSon;
  };

  WIDGETS.gps={area:"tr",width:24,draw:function() {
    g.reset();

    // check if we need to update the widget periodically
    if (Bangle.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 (!Bangle.isGPSOn() && interval !== undefined) {
      clearInterval(interval);
      interval = undefined;
    }
    if (settings.crossIcon) {
       if (Bangle.isGPSOn()) {
        const gpsObject = Bangle.getGPSFix();
        if (gpsObject && gpsObject.fix > 0) {
          g.setColor("#0F0"); // on and has fix = green
        } else {
          g.setColor("#FD0"); // on but no fix = amber
        }
      } else {
        g.setColor("#888"); // off = grey
      }
      g.drawImage(atob("GBiBAAAAAAAAAAAAAA//8B//+BgYGBgYGBgYGBgYGBgYGBgYGB//+B//+BgYGBgYGBgYGBgYGBgYGBgYGB//+A//8AAAAAAAAAAAAA=="), this.x, 2+this.y);
    } else { // marker icons
      if (Bangle.isGPSOn()) {
        const gpsObject = Bangle.getGPSFix();
        if (gpsObject && gpsObject.fix > 0) {
          g.drawImage(atob("GBjBAP//AAAAAAAAAAAAfgAA/wABw4ADAMAHAMAGPGAGPGAGPGAGPGADAMADAMADgcABgYABw4AAwwAAZgAAfgAAPAAAGAAAAAAAAAAAAAA="), this.x, 2+this.y); // on and has fix
        } else {
          g.drawImage(atob("GBjBAP//AAAAAAAAAAAIfgAN/4APgeAPAHAPgDAAPBgAfhgA5wwAwwwAwwwwwwAwZgAwfgAYPAAYGAAMAfAOAPAHgfAB/7AAfhAAAAAAAAA="), this.x, 2+this.y); // on but no fix
        }
      } else {
        g.drawImage(atob("GBjBAP//AAAAAAAAAAAAfgAY/wAcQ4AOAMAHAMAHjGAHxGAG4GAGcGADOMADHEADjgABhwABw4AAw8AAZuAAfnAAPDgAGBgAAAAAAAAAAAA="), this.x, 2+this.y); // off
      }
    }
  }};
})();