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/**************************************************************************
* 文件名 ：
* =======================================================================
* 创 建 者 ：田小帆
* 创建日期 ：
* 邮 箱 ：
* Q Q ：
* 公 司 ：
* 功能描述 ：
*
* ======================================================================
* 修改者 ：
* 修改日期 ：
* 修改内容 ：
* ======================================================================
*
***************************************************************************/
# pragma once
# include <private/qgeofiletilecache_p.h>
# include <QSqlDatabase>
class TiQGeoFileTileCache : public QGeoFileTileCache
{
public :
TiQGeoFileTileCache ( const QString & directory = QString ( ) , QObject * parent = nullptr ) ;
~ TiQGeoFileTileCache ( ) ;
QSharedPointer < QGeoTileTexture > get ( const QGeoTileSpec & spec ) override ;
void insert ( const QGeoTileSpec & spec , const QByteArray & bytes , const QString & format ,
QAbstractGeoTileCache : : CacheAreas areas = QAbstractGeoTileCache : : AllCaches ) override ;
private :
void addToSqlite ( const QGeoTileSpec & spec , const QString & format , const QByteArray & bytes ) ;
QSharedPointer < QGeoTileTexture > getFromSqlite ( const QGeoTileSpec & spec ) ;
//由于qtlocation提供的qhash计算出现错误的机率较大,因此我们自已计算hash
static quint64 getTileHash ( int type , int x , int y , int z ) ;
bool openSqlite ( const QString & connectId ) ;
private :
QSqlDatabase * m_db = nullptr ;
bool m_valid = false ;
QString m_dbName = " TiMapCache.db " ;
} ;