text: /****************************************************************************
  **
  ** Copyright (C) 2015 The Qt Company Ltd.
  ** Contact: http://www.qt.io/licensing/
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  ** This file is part of the demonstration applications of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL21$
  ** Commercial License Usage
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  ** accordance with the commercial license agreement provided with the
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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