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geocode() form QGeoCodingManager class not returning anything after passing an address.



  • Hey guys! I feel like I almost have geocode() working but I pass an address to geocode() and it returns an empty list ( longitude gets set to -1 below). Any tips would be greatly appreciated!
    #include "mapactions.h"
    #include <QGeoPositionInfoSource>
    #include <QGeoServiceProvider>
    #include <QGeoCodeReply>
    #include <QGeoCodingManager>
    #include <QGeoAddress>
    #include <QGeoCoordinate>
    #include <QGeoLocation>
    #include <QGeoShape>

    void MapFunctions::getmyaddress()
    {
    // QMap<QString,QVariant> params;
    // params["osm.geocoding.host"] = "https://nominatim.openstreetmap.org";
    QGeoServiceProvider* geoSrv = new QGeoServiceProvider( "osm");
    QGeoCodingManager *geoCoder = geoSrv->geocodingManager();
    QGeoAddress addr;
    addr.setCountry( "Canada" );
    addr.setCity("Toronto");
    QGeoCodeReply *geoCode = geoCoder->geocode(addr);
    if(geoCode->error()!= geoCode->NoError)
    {
    latitude = 14;
    }
    if((geoCode->locations()).isEmpty())
    {
    longitude =-1.0;
    return;
    }
    longitude = (geoCode->locations()).first().coordinate().longitude();
    latitude = (geoCode->locations()).first().coordinate().latitude();
    }


  • Lifetime Qt Champion

    Please read the documentation - the call only starts the geocoding. You have to connect to the appropriate signals.



  • This post is deleted!


  • @Christian-Ehrlicher Hey, thanks for the reply! I tried implementing the slot handleFinish() but the values I'm getting are wonky, however, the list is no longer empty! I feel like the issue could be due to me making QGeoCodeReply *geoCode public as I was unsure how to pass it to the slot. Any tips are greatly appreciated!
    69ea174d-8825-43eb-bb49-94d3479935d7-image.png


  • Lifetime Qt Champion

    Sorry but this code is neither correct in any way nor does it compile at all. Please learn basic c++ and take a look at the Qt signals/slots examples.



  • @Christian-Ehrlicher Ok, thankyou for your help. I have reviewed my code and reviewed the documentation. The slots and signals are now recognized but I am still not getting reasonable values. The issue is that neither slots are being called. If you could point me in the right direction that would be great.06de09d3-349b-42cf-8f48-2326feea308d-image.png


  • Lifetime Qt Champion

    @CaptainJuice Are you sure handleError is not called? How did you check that?

    Also, please post your code as text, not screen-shots.



  • @jsulm Sorry about that, will make sure to change that next time. I know it never enters either one of handleError() or handleFinish() because in my QML i have,

    Component.onCompleted: {
    MapFunctions.getmyaddress();
    console.log("Coordinate:", MapFunctions.getlatitude());
    console.log("Coordinate:", MapFunctions.getlongitude());
    }

    for the application window. If I set values in those handle() functions they do not get reflected in the console log. For example I set longitude= 14 in handleFinish() and I comment out the other code and this has no effect on the output. For handleError() the values do not get set to -1 so it doesn't get called.


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