qgeotilefetcher_p.h

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// Copyright (C) 2015 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QGEOTILEFETCHER_H
#define QGEOTILEFETCHER_H
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
 
#include <QObject>
#include <QtLocation/private/qlocationglobal_p.h>
#include <QtLocation/private/qabstractgeotilecache_p.h>
 
QT_BEGIN_NAMESPACE
 
class QGeoMapRequestOptions;
class QGeoTileFetcherPrivate;
class QGeoTiledMappingManagerEngine;
class QGeoTiledMapReply;
class QGeoTileSpec;
 
class Q_LOCATION_EXPORT QGeoTileFetcher : public QObject
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QGeoTileFetcher)
 
public:
    QGeoTileFetcher(QGeoMappingManagerEngine *parent);
    virtual ~QGeoTileFetcher();
 
public Q_SLOTS:
    void updateTileRequests(const QSet<QGeoTileSpec> &tilesAdded, const QSet<QGeoTileSpec> &tilesRemoved);
 
private Q_SLOTS:
    void cancelTileRequests(const QSet<QGeoTileSpec> &tiles);
    void requestNextTile();
    void finished();
 
Q_SIGNALS:
    void tileFinished(const QGeoTileSpec &spec, const QByteArray &bytes, const QString &format);
    void tileError(const QGeoTileSpec &spec, const QString &errorString);
 
protected:
    QGeoTileFetcher(QGeoTileFetcherPrivate &dd, QGeoMappingManagerEngine *parent);
 
    void timerEvent(QTimerEvent *event) override;
    QAbstractGeoTileCache::CacheAreas cacheHint() const;
    virtual bool initialized() const;
    virtual bool fetchingEnabled() const;
 
private:
 
    virtual QGeoTiledMapReply *getTileImage(const QGeoTileSpec &spec) = 0;
    virtual void handleReply(QGeoTiledMapReply *reply, const QGeoTileSpec &spec);
 
    Q_DISABLE_COPY(QGeoTileFetcher)
    friend class QGeoTiledMappingManagerEngine;
};
 
QT_END_NAMESPACE
 
#endif