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.