Qt Reference Documentation

# slippymap.h Example File

demos/embedded/lightmaps/slippymap.h

     /****************************************************************************
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     ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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     ** Contact: Nokia Corporation (qt-info@nokia.com)
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     ** This file is part of the demonstration applications of the Qt Toolkit.
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     ** $QT_BEGIN_LICENSE:LGPL$
     ** GNU Lesser General Public License Usage
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     ** file. Please review the following information to ensure the GNU Lesser
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     ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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     ** GNU General Public License Usage
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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