navigation.js Example File | Qt Quick Controls 5.12.11

- Qt 5.12
- Qt Quick Controls
- Qt Quick Controls - Wearable Demo
- navigation.js Example File
- Qt 5.12.11 Reference Documentation

# navigation.js Example File

wearable/qml/Navigation/navigation.js

     /****************************************************************************
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     ** This file is part of the examples of the Qt Toolkit.
     **
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     function requestNavigationRoute(rModel) {
         var xhr = new XMLHttpRequest;
         xhr.open("GET", "walk_route.json");
         xhr.onreadystatechange = function () {
             if (xhr.readyState === XMLHttpRequest.DONE) {
                 var a = JSON.parse(xhr.responseText);
                 var steps = a.routes[0].legs[0].steps;

                 for (var step in steps) {
                     var maneuver = steps[step].maneuver;
                     var duration = steps[step].duration;
                     var distance = steps[step].distance;

                     rModel.append({
                                           navInstruction: maneuver.instruction,
                                           navImage: getNavigationImage(
                                                         maneuver.type,
                                                         maneuver.modifier,
                                                         routeView.imageList),
                                           navAuxInfo: getAuxInfo(distance,
                                                                  duration)
                                       });
                 }
             }
         }
         xhr.send();
     }

     function getNavigationImage(maneuverType, maneuverModifier, imageList) {
         var imageToReturn;
         if (maneuverType === "depart") {
             imageToReturn = imageList[4];
         } else if (maneuverType === "arrive") {
             imageToReturn = imageList[5];
         } else if (maneuverType === "turn") {
             if (maneuverModifier.search("left") >= 0)
                 imageToReturn = imageList[1];
             else if (maneuverModifier.search("right") >= 0)
                 imageToReturn = imageList[2];
             else
                 imageToReturn = imageList[0];
         } else {
             if (maneuverModifier === "uturn") {
                 imageToReturn = imageList[3];
             } else {
                 imageToReturn = imageList[0];
             }
         }

         return imageToReturn;
     }

     function getAuxInfo(distInMeters, timeInSecs) {
         var distance = convertDistance(distInMeters);
         if (distance.length > 0)
             return "Distance: " + distance + "\nTime: " + formatSeconds(
                         timeInSecs);
         else
             return "";
     }

     function convertDistance(meter) {
         var dist = "";
         var feet = (meter * 0.3048).toPrecision(6);
         var miles = (meter * 0.000621371).toPrecision(6);

         if (Math.floor(miles) > 1) {
             dist += Math.floor(miles) + " mi";
             feet = ((miles - Math.floor(miles)) * 0.3048).toPrecision(6);
         }
         if (Math.floor(feet) > 1)
             dist += Math.floor(feet) + " ft";

         return dist
     }

     function formatSeconds(seconds) {
         var date = new Date(1970, 0, 1);
         date.setSeconds(seconds);
         return date.toTimeString().replace(/.*(\d{2}:\d{2}:\d{2}).*/, "$1");
     }