LocationToElevation synchronic

AnatBen_Israel — Sun, 10 Dec 2017 10:03:24 GMT

Hello,

Is there a way to call LocationToElevation synchronically?

Something like the "await" in C# that will bypass the need to always wait for the slot...

It makes calculations so complicated when there is, for example, a loop in which each iteration needs the elevation.

Thanks

Re: LocationToElevation synchronic

LukeSmallwood — Fri, 15 Dec 2017 14:28:26 GMT

Hi Anat, I hope you are well. Unfortunately, we do not currently have a synchronous version of this call. One approach that might work for you is to create a QEventLoop which you can run to wait until the operation completes.

I've included some code below that shows how that could work - any questions, let me know:

        auto startTaskId = surface->locationToElevation(loc).taskId();

        QEventLoop loop;

        loop.connect(surface, &Surface::locationToElevationCompleted, this, [this, &loop, startTaskId](QUuid taskId, double elevation)

            if (taskId != startTaskId)

                return;

            qDebug() << elevation;

            loop.quit();

});

        loop.connect(surface, &Surface::errorOccurred, &loop, &QEventLoop::quit);

        loop.exec();

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LocationToElevation synchronic

Re: LocationToElevation synchronic