qgsvectortileloader.h

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/***************************************************************************
  qgsvectortileloader.h
  --------------------------------------
  Date                 : March 2020
  Copyright            : (C) 2020 by Martin Dobias
  Email                : wonder dot sk at gmail dot com
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
 
#ifndef QGSVECTORTILELOADER_H
#define QGSVECTORTILELOADER_H
 
#define SIP_NO_FILE
 
class QByteArray;
 
#include "qgsvectortilerenderer.h"
#include "qgshttpheaders.h"
 
class QgsVectorTileRawData
{
  public:
    QgsVectorTileRawData( QgsTileXYZ tileID = QgsTileXYZ(), const QByteArray &raw = QByteArray() )
      : id( tileID ), data( raw ) {}
 
    QgsTileXYZ id;
    QByteArray data;
};
 
 
class QNetworkReply;
class QEventLoop;
 
class QgsMbTiles;
 
class QgsTileDownloadManagerReply;
 
class QgsVectorTileLoader : public QObject
{
    Q_OBJECT
  public:
 
    static QList<QgsVectorTileRawData> blockingFetchTileRawData( const QString &sourceType,
        const QString &sourcePath,
        const QgsTileMatrix &tileMatrix,
        const QPointF &viewCenter,
        const QgsTileRange &range,
        const QString &authid,
        const QgsHttpHeaders &headers,
        QgsFeedback *feedback = nullptr );
 
    static QByteArray loadFromNetwork( const QgsTileXYZ &id,
                                       const QgsTileMatrix &tileMatrix,
                                       const QString &requestUrl,
                                       const QString &authid,
                                       const QgsHttpHeaders &headers,
                                       QgsFeedback *feedback = nullptr );
    static QByteArray loadFromMBTiles( const QgsTileXYZ &id, QgsMbTiles &mbTileReader, QgsFeedback *feedback = nullptr );
 
    //
    // non-static stuff
    //
 
    QgsVectorTileLoader( const QString &uri, const QgsTileMatrix &tileMatrix, const QgsTileRange &range, const QPointF &viewCenter,
                         const QString &authid, const QgsHttpHeaders &headers, QgsFeedback *feedback );
    ~QgsVectorTileLoader();
 
    void downloadBlocking();
 
    QString error() const;
 
  private:
    void loadFromNetworkAsync( const QgsTileXYZ &id, const QgsTileMatrix &tileMatrix, const QString &requestUrl );
 
  private slots:
    void tileReplyFinished();
    void canceled();
 
  signals:
    void tileRequestFinished( const QgsVectorTileRawData &rawTile );
 
  private:
    std::unique_ptr<QEventLoop> mEventLoop;
    QgsFeedback *mFeedback;
 
    QString mAuthCfg;
    QgsHttpHeaders mHeaders;
 
    QList<QgsTileDownloadManagerReply *> mReplies;
 
    QString mError;
 
};
 
#endif // QGSVECTORTILELOADER_H