Qt 5.11 | Qt Quick Controls 2 | Qt Quick Controls 2 - Wearable Demo | navigation.js Example File

Qt 5.11.3 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");
      }