Qt 5.11 | Qt Positioning | GeoFlickr (QML) | GeoTab.qml Example File

Qt 5.11.3 Reference Documentation

# GeoTab.qml Example File

geoflickr/flickrmobile/GeoTab.qml

      /****************************************************************************
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      ** Copyright (C) 2017 The Qt Company Ltd.
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      ** This file is part of the examples of the Qt Toolkit.
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      ** Alternatively, you may use this file under the terms of the BSD license
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      import QtQuick 2.0
      import QtPositioning 5.2

      Rectangle {
          id: container
          property int maxX: parent.width; property int maxY: parent.height
          property variant coordinate

          Binding {
              target: container
              property: "coordinate"
              value: positionSource.position.coordinate
          }

          width: 300; height: 130
          color: "blue"
          opacity: 0.7
          border.color: "black"
          border.width: 1
          radius: 5
          gradient: Gradient {
              GradientStop {position: 0.0; color: "grey"}
              GradientStop {position: 1.0; color: "black"}
          }
          MouseArea {
              anchors.fill: parent
              drag.target: parent
              drag.axis: Drag.XandYAxis
              drag.minimumX: -(parent.width * (2/3)); drag.maximumX: parent.maxX - (parent.width/3)
              drag.minimumY: -(parent.height/2); drag.maximumY: parent.maxY - (parent.height/2)
          }
          Button {
              id: locateButton
              text: "Locate & update"
              anchors {left: parent.left; leftMargin: 5}
              y: 3; height: 32; width: parent.width - 10
              onClicked: {
                  if (positionSource.supportedPositioningMethods ===
                          PositionSource.NoPositioningMethods) {
                      positionSource.nmeaSource = "nmealog.txt";
                      sourceText.text = "(filesource): " + printableMethod(positionSource.supportedPositioningMethods);
                  }
                  positionSource.update();
              }
          }
          PositionSource {
              id: positionSource
              onPositionChanged: { planet.source = "images/sun.png"; }

              onSourceErrorChanged: {
                  if (sourceError == PositionSource.NoError)
                      return

                  console.log("Source error: " + sourceError)
                  activityText.fadeOut = true
                  stop()
              }

              onUpdateTimeout: {
                  activityText.fadeOut = true
              }
          }
          function printableMethod(method) {
              if (method === PositionSource.SatellitePositioningMethods)
                  return "Satellite";
              else if (method === PositionSource.NoPositioningMethods)
                  return "Not available"
              else if (method === PositionSource.NonSatellitePositioningMethods)
                  return "Non-satellite"
              else if (method === PositionSource.AllPositioningMethods)
                  return "Multiple"
              return "source error";
          }

          Grid {
              id: locationGrid
              columns: 2
              anchors {left: parent.left; leftMargin: 5; top: locateButton.bottom; topMargin: 5}
              spacing: 5
              Text {color: "white"; font.bold: true
                  text: "Lat:"; style: Text.Raised; styleColor: "black"
              }
              Text {id: latitudeValue; color: "white"; font.bold: true
                  text: positionSource.position.coordinate.latitude; style: Text.Raised; styleColor: "black";
              }
              Text {color: "white"; font.bold: true
                  text: "Lon:"; style: Text.Raised; styleColor: "black"
              }
              Text {id: longitudeValue; color: "white"; font.bold: true
                  text: positionSource.position.coordinate.longitude; style: Text.Raised; styleColor: "black"
              }
          }
          Image {
              id: planet
              anchors {top: locationGrid.bottom; left: parent.left; leftMargin: locationGrid.anchors.leftMargin}
              source: "images/moon.png"
              width: 30; height: 30
          }
          Text {id: sourceText; color: "white"; font.bold: true;
              anchors {left: planet.right; leftMargin: 5; verticalCenter: planet.verticalCenter}
              text: "Source: " + printableMethod(positionSource.supportedPositioningMethods); style: Text.Raised; styleColor: "black";
          }

          Text {
              id: activityText; color: "white"; font.bold: true;
              anchors { top: planet.bottom; horizontalCenter: parent.horizontalCenter }
              property bool fadeOut: false

              text: {
                  if (fadeOut)
                      return qsTr("Timeout occurred!");
                  else if (positionSource.active)
                      return qsTr("Retrieving update...")
                  else
                      return ""
              }

              Timer {
                  id: fadeoutTimer; repeat: false; interval: 3000; running: activityText.fadeOut
                  onTriggered: { activityText.fadeOut = false; }
              }
          }
      }