Weather Info

[emrullahozdemir]

Hi, im using qt creator and i am designing gui for home automation and i want to add to main window ( core gui ) weather info ( should be always updated and should get location info from gps ) I searched the internet and i found qml things but my gui is not qml. How i can do this?

[CKurdu]

Hi Emrullah,
You can use qgeopositioninfo and qgeopositioninfosource classes and you can use QWidget based controls and Qt network facilities to get weather info from any weather service ( yahoo, openweathermap, etc).

[emrullahozdemir]

Thanks for the replying! Actually i want to add this xhtml code (http://www.mgm.gov.tr/sunum/tahmin-klasik-5070.aspx?m=ANKARA&basla=1&bitir=5&rC=111&rZ=fff) to my mainwindow. How can i do this?

[CKurdu]

Your weather service is returning png. Below code shows the image. For your first question, you need a reverse geolocation service to define the location of the city in Turkey. Like https://locationiq.com/#demo.

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    man = new QNetworkAccessManager();
    connect(man,&QNetworkAccessManager::finished,this,&MainWindow::rfinished);

    req = new QNetworkRequest(QUrl("https://www.mgm.gov.tr/sunum/tahmin-klasik-5070.aspx?m=ANKARA&basla=1&bitir=5&rC=111&rZ=fff"));
    rep = man->get(*req);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::rfinished(QNetworkReply *prep)
{
   if(prep->error() != QNetworkReply::NoError)
   {
       prep->deleteLater();
       return;
   }
   QFile image("weather.png");
   if(!image.open(QIODevice::WriteOnly))
   {
       prep->deleteLater();
       return;
   }
   QByteArray result = prep->readAll();
   image.write(result);
   image.close();
   QImage img("weather.png");
   ui->label->setPixmap(QPixmap::fromImage(img));

   prep->deleteLater();
}

[Pablo J. Rogina]

@emrullahozdemir from CKurdu example, you need to make the hard-code city value (i.e. ANKARA) variable, if not weather will always display for such location...

req = new QNetworkRequest(QUrl("https://www.mgm.gov.tr/sunum/tahmin-klasik-5070.aspx?m=ANKARA&basla=1&bitir=5&rC=111&rZ=fff"));

[emrullahozdemir]

@CKurdu it says "man", "req" and "rep" was not declared in this scope

[Pablo J. Rogina]

@emrullahozdemir said in Weather Info:

it says "man", "req" and "rep" was not declared in this scope

That's pure C++ issue. Are you able to get them in scope? Think about members of MainWindow class for instance...

[emrullahozdemir]

can i show the info in webview? load(url) doesnt work.