Qt 4.8: slippymap.h Example File (demos/embedded/lightmaps/slippymap.h)

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# slippymap.h Example File

demos/embedded/lightmaps/slippymap.h

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the demonstration applications of the Qt Toolkit.
     **
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     ** Alternatively, this file may be used under the terms of the GNU Lesser
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     ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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     ** GNU General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License version 3.0 as published by the Free Software
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     #ifndef SLIPPYMAP_H
     #define SLIPPYMAP_H

     #include <QNetworkAccessManager>
     #include <QPixmap>
     #include <QUrl>

     class QNetworkReply;
     class QPainter;

     class SlippyMap: public QObject
     {
         Q_OBJECT

     public:
         SlippyMap(QObject *parent = 0);
         void invalidate();
         void render(QPainter *p, const QRect &rect);
         void pan(const QPoint &delta);

         int width;
         int height;
         int zoom;
         qreal latitude;
         qreal longitude;

     signals:
         void updated(const QRect &rect);

     private slots:
         void handleNetworkData(QNetworkReply *reply);
         void download();

     protected:
         QRect tileRect(const QPoint &tp);

     private:
         QPoint m_offset;
         QRect m_tilesRect;
         QPixmap m_emptyTile;
         QHash<QPoint, QPixmap> m_tilePixmaps;
         QNetworkAccessManager m_manager;
         QUrl m_url;
     };

     #endif