Qt 5.9 | Qt Positioning | Weather Info (C++/QML) | appmodel.h Example File

Qt 5.9.4 Reference Documentation

# appmodel.h Example File

weatherinfo/appmodel.h

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      #ifndef APPMODEL_H
      #define APPMODEL_H

      #include <QtCore/QObject>
      #include <QtCore/QString>
      #include <QtNetwork/QNetworkReply>
      #include <QtQml/QQmlListProperty>

      #include <QtPositioning/QGeoPositionInfoSource>

      class WeatherData : public QObject {
          Q_OBJECT
          Q_PROPERTY(QString dayOfWeek
                     READ dayOfWeek WRITE setDayOfWeek
                     NOTIFY dataChanged)
          Q_PROPERTY(QString weatherIcon
                     READ weatherIcon WRITE setWeatherIcon
                     NOTIFY dataChanged)
          Q_PROPERTY(QString weatherDescription
                     READ weatherDescription WRITE setWeatherDescription
                     NOTIFY dataChanged)
          Q_PROPERTY(QString temperature
                     READ temperature WRITE setTemperature
                     NOTIFY dataChanged)

      public:
          explicit WeatherData(QObject *parent = 0);
          WeatherData(const WeatherData &other);

          QString dayOfWeek() const;
          QString weatherIcon() const;
          QString weatherDescription() const;
          QString temperature() const;

          void setDayOfWeek(const QString &value);
          void setWeatherIcon(const QString &value);
          void setWeatherDescription(const QString &value);
          void setTemperature(const QString &value);

      signals:
          void dataChanged();
      private:
          QString m_dayOfWeek;
          QString m_weather;
          QString m_weatherDescription;
          QString m_temperature;
      };

      Q_DECLARE_METATYPE(WeatherData)

      class AppModelPrivate;
      class AppModel : public QObject
      {
          Q_OBJECT
          Q_PROPERTY(bool ready
                     READ ready
                     NOTIFY readyChanged)
          Q_PROPERTY(bool hasSource
                     READ hasSource
                     NOTIFY readyChanged)
          Q_PROPERTY(bool hasValidCity
                     READ hasValidCity
                     NOTIFY cityChanged)
          Q_PROPERTY(bool hasValidWeather
                     READ hasValidWeather
                     NOTIFY weatherChanged)
          Q_PROPERTY(bool useGps
                     READ useGps WRITE setUseGps
                     NOTIFY useGpsChanged)
          Q_PROPERTY(QString city
                     READ city WRITE setCity
                     NOTIFY cityChanged)
          Q_PROPERTY(WeatherData *weather
                     READ weather
                     NOTIFY weatherChanged)
          Q_PROPERTY(QQmlListProperty<WeatherData> forecast
                     READ forecast
                     NOTIFY weatherChanged)

      public:
          explicit AppModel(QObject *parent = 0);
          ~AppModel();

          bool ready() const;
          bool hasSource() const;
          bool useGps() const;
          bool hasValidCity() const;
          bool hasValidWeather() const;
          void setUseGps(bool value);
          void hadError(bool tryAgain);

          QString city() const;
          void setCity(const QString &value);

          WeatherData *weather() const;
          QQmlListProperty<WeatherData> forecast() const;

      public slots:
          Q_INVOKABLE void refreshWeather();

      private slots:
          void queryCity();
          void networkSessionOpened();
          void positionUpdated(QGeoPositionInfo gpsPos);
          void positionError(QGeoPositionInfoSource::Error e);
          // these would have QNetworkReply* params but for the signalmapper
          void handleGeoNetworkData(QObject *networkReply);
          void handleWeatherNetworkData(QObject *networkReply);
          void handleForecastNetworkData(QObject *networkReply);

      signals:
          void readyChanged();
          void useGpsChanged();
          void cityChanged();
          void weatherChanged();

      private:
          AppModelPrivate *d;

      };

      #endif // APPMODEL_H