Viewer3DTileReply.h

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#pragma once
 
#include <QtCore/QObject>
#include <QtCore/QPointer>
#include <QtCore/qcontainerfwd.h>
 
#include "Viewer3DTileInfo.h"
 
struct QGCCacheTile;
class QNetworkAccessManager;
class QNetworkReply;
class QTimer;
 
class Viewer3DTileReply : public QObject
{
    Q_OBJECT
 
    friend class Viewer3DTileReplyTest;
 
public:
    using TileInfo_t = Viewer3DTileInfo;
 
    explicit Viewer3DTileReply(int zoomLevel, int tileX, int tileY, int mapId, const QString &mapType, QNetworkAccessManager *networkManager, QObject *parent = nullptr);
    ~Viewer3DTileReply();
 
signals:
    void tileDone(TileInfo_t);
    void tileEmpty(TileInfo_t);
    void tileGiveUp(TileInfo_t);
 
private:
    void _prepareDownload();
    void _onRequestFinished();
    void _onRequestError();
    void _onTimeout();
    void _onCacheHit(QGCCacheTile *tile);
    void _onCacheMiss();
    void _disconnectReply();
    bool _isBingEmptyTile() const;
 
    static constexpr int kTimeoutMs   = 10000;
    static constexpr int kMaxRetries  = 5;
 
    QNetworkAccessManager *_networkManager = nullptr;
    // QPointer: the reply is parented to the network manager and may be
    // destroyed before us during ~Viewer3DTileQuery child cleanup.
    QPointer<QNetworkReply> _reply;
    QTimer *_timeoutTimer = nullptr;
 
    TileInfo_t _tile;
    int _timeoutCounter = 0;
 
    static QByteArray _bingNoTileImage;
};