hide button if no gps data is present on the log

Author: bonchan

css/main.css

@@ -1205,6 +1205,10 @@ html:not(.has-log) #status-bar {
     display: none;
 }
 
+html:not(.has-gps) .btn-gpx-export {
+    display: none;
+}
+
 #status-bar .bookmark-1,
 #status-bar .bookmark-2,
 #status-bar .bookmark-3,

js/flightlog.js

@@ -1059,6 +1059,10 @@ function FlightLog(logData) {
 
         return true;
     };
+
+    this.hasGpsData = function() {
+        return this.getStats().frame.G ? true : false;;
+    };
 }
 
 FlightLog.prototype.accRawToGs = function(value) {

js/main.js

@@ -408,6 +408,8 @@ function BlackboxLogViewer() {
         seekBar.setActivity(activity.times, activity.avgThrottle, activity.hasEvent);
 
         seekBar.repaint();
+
+        html.toggleClass("has-gps", flightLog.hasGpsData());
     }
 
     function setGraphState(newState) {

js/webworkers/gpx-export-worker.js

@@ -1,18 +1,19 @@
 importScripts("/node_modules/lodash/lodash.min.js");
 
 onmessage = function (event) {
-  const header = `<?xml version="1.0" encoding="UTF-8"?>
-    <gpx xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.topografix.com/GPX/1/1" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd" xmlns:gpx_style="http://www.topografix.com/GPX/gpx_style/0/2" 
-    version="1.1" 
-    creator="https://github.com/betaflight/blackbox-log-viewer">
-    <metadata>
-        <author>
-            <name>Betaflight Blackbox Explorer</name>
-            <link href="https://github.com/betaflight/blackbox-log-viewer"></link>
-        </author>
-    </metadata>`;
-
-  const footer = "</gpx>";
+  const header = `
+<?xml version="1.0" encoding="UTF-8"?>
+<gpx xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.topografix.com/GPX/1/1" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd" xmlns:gpx_style="http://www.topografix.com/GPX/gpx_style/0/2" 
+  version="1.1" 
+  creator="https://github.com/betaflight/blackbox-log-viewer">
+  <metadata>
+    <author>
+      <name>Betaflight Blackbox Explorer</name>
+      <link href="https://github.com/betaflight/blackbox-log-viewer"></link>
+    </author>
+  </metadata>`;
+
+  const footer = `</gpx>`;
 
   const timeIndex = event.data.fieldNames.indexOf("time");
   const latIndex = event.data.fieldNames.indexOf("GPS_coord[0]");
@@ -49,12 +50,11 @@ onmessage = function (event) {
     }
   }
 
-  let trk = 
-  `<trk>
-    <name>new</name>
-    <type>Flight</type>
+  let trk = `
+  <trk>
     <trkseg>${trkpts}</trkseg>
-   </trk>`;
+  </trk>
+`;
 
   postMessage(header + "\n" + trk + "\n" + footer);
 };