topic Re: get user coordinates without going to application map page in Qt Maps SDK Questions

get user coordinates without going to application map page

rsharma — Tue, 25 Aug 2020 10:24:13 GMT

HI i want to get user location coordinates without going to its map page like this link i followed. It works only on map page

Get the path covered by user and display current location

So that i can show user history on map even when it switched to any other page of application.

Is their any way so that even when a user is not on map page my app get its coordinates.

This is the code i edited for map page only.

import QtQuick 2.6

import QtQuick.Controls 2.2

import Esri.ArcGISRuntime 100.6

Rectangle {

    id: rootRectangle

    clip: true

    width: 800

    height: 600

    readonly property int initialZoomScale: 8000

    property bool trackingEnabled: false

    property Point lastPosition: null

    // add a mapView component

    MapView {

        anchors.fill: parent

        Map {

            BasemapDarkGrayCanvasVector {}

        // set initial viewpoint near UCLA, Los Angeles

        ViewpointCenter {

            Point {

                x: -13185535.98

                y: 4037766.28

            targetScale: initialZoomScale

        Button {

            id: button

            text: trackingEnabled ? "Stop tracking" : "Start tracking"

            anchors.horizontalCenter: parent.horizontalCenter

            width: 200

            onClicked: trackingEnabled =! trackingEnabled

        // if tracking is enabled then show location history

        locationDisplay.onLocationChanged: {

            if (!trackingEnabled)

                return;

            if (lastPosition !== null) {

                polylineBuilder.addPoint(lastPosition);

            // update last position

            lastPosition = locationDisplay.location.position;

            console.log(JSON.stringify(lastPosition.json));

            // update the polyline

            locationHistoryLineOverlay.graphics.append(ArcGISRuntimeEnvironment.createObject("Graphic", {geometry: polylineBuilder.geometry}));

         console.log(JSON.stringify(polylineBuilder.geometry.json.paths));

        Component.onCompleted: {

            locationDisplay.autoPanMode = Enums.LocationDisplayAutoPanModeCompassNavigation;

             locationDisplay.start();

        GraphicsOverlay {

            id: locationHistoryLineOverlay

            SimpleRenderer {

                SimpleLineSymbol {

                    color: "blue"

                    style: Enums.SimpleLineSymbolStyleDash

                    width: 5

    }//End Mapview

    PolylineBuilder {

        id: polylineBuilder

        spatialReference: SpatialReference { wkid: 4326 }

Re: get user coordinates without going to application map page

rsharma — Tue, 25 Aug 2020 10:46:59 GMT

I get this link Position display—ArcGIS Runtime SDK for Qt | ArcGIS for Developers Is their any example for recording. tracklog etc

Re: get user coordinates without going to application map page

LucasDanzinger — Sat, 11 Dec 2021 08:00:27 GMT

You can use Qt's PositionSource type. The LocationDisplay is simply used to display the location on the map. If you just want to get the position from the device, PositionSource will do that for you.

PositionSource {
    Component.onCompleted: start();
    onPositionChanged: console.log("position changed", position.coordinate)
}‍‍‍‍

PositionSource QML Type | Qt Positioning 5.15.0

Re: get user coordinates without going to application map page

rsharma — Wed, 26 Aug 2020 04:33:34 GMT

It gives me error

module \"QtPositioning\" version 5.15 is not installed" so i import 5.11 version

I am using arcgis appstudio version 4.2

Query 1: Plus i want this to be happen on when user sign in on my property, so i will do that but how to put it in if condition to start on login if condition checking and how to stop it. like if user sign-out from the property. I will use the code on sign on click but how to stop on sign-out btn click

Re: get user coordinates without going to application map page

LucasDanzinger — Wed, 26 Aug 2020 13:54:38 GMT

AppStudio is based on 5.13 I believe, so you'll need to import an older version. Since I'm not sure which version of Qt maps to which version of QtPositioning, I'd try decreasing until you find a version that works For example, try importing version 5.13.

As for how to stop it, you can call the stop method on PostionSource - PositionSource QML Type | Qt Positioning 5.15.0