- Qt 5.5
- Qt Positioning
- Weather Info (C++/QML)
- appmodel.h Example File
- Qt 5.5.1 Reference Documentation

# appmodel.h Example File

weatherinfo/appmodel.h

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** You may use this file under the terms of the BSD license as follows:
    **
    ** "Redistribution and use in source and binary forms, with or without
    ** modification, are permitted provided that the following conditions are
    ** met:
    **   * Redistributions of source code must retain the above copyright
    **     notice, this list of conditions and the following disclaimer.
    **   * Redistributions in binary form must reproduce the above copyright
    **     notice, this list of conditions and the following disclaimer in
    **     the documentation and/or other materials provided with the
    **     distribution.
    **   * Neither the name of The Qt Company Ltd nor the names of its
    **     contributors may be used to endorse or promote products derived
    **     from this software without specific prior written permission.
    **
    **
    ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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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