appmodel.h Example File

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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