tabmapheaderblock.h

linux下一款GIS程序源码

// tabmapheaderblock.h: interface for the TABMAPHeaderBlock class.
//
/*---------------------------------------------------------------------
 *                      class TABMAPHeaderBlock
 *
 * Class to handle Read/Write operation on .MAP Header Blocks 
 *--------------------------------------------------------------------*/

#ifndef  TABMAPHeaderBlock_H
#define  TABMAPHeaderBlock_H


#include "tabrawbinblock.h"

class TABMAPHeaderBlock : public TABRawBinBlock  
{
protected:
	TABProjInfo m_sProj;
public:
	TABMAPHeaderBlock(TABAccess eAccessMode = TABRead);
	virtual ~TABMAPHeaderBlock();

    virtual int CommitToFile();

    virtual int InitBlockFromData(UGKByte *pabyBuf, int nSize, 
                              UGKBool bMakeCopy = TRUE,
                              FILE *fpSrc = NULL, int nOffset = 0);

	virtual int InitNewBlock(FILE *fpSrc, int nBlockSize, int nFileOffset=0);

	virtual int GetBlockClass() { return TABMAP_HEADER_BLOCK; };

	int         Int2Coordsys(UGKInt32 nX, UGKInt32 nY, double &dX, double &dY);
    int         Coordsys2Int(double dX, double dY, UGKInt32 &nX, UGKInt32 &nY, 
                             UGKBool bIgnoreOverflow=FALSE);
    int         ComprInt2Coordsys(UGKInt32 nCenterX, UGKInt32 nCenterY, 
                                  int nDeltaX, int nDeltaY, 
                                  double &dX, double &dY);
    int         Int2CoordsysDist(UGKInt32 nX, UGKInt32 nY, double &dX, double &dY);
    int         Coordsys2IntDist(double dX, double dY, UGKInt32 &nX, UGKInt32 &nY);
    int         SetCoordsysBounds(double dXMin, double dYMin, 
                                  double dXMax, double dYMax);

    int         GetMapObjectSize(int nObjType);
    UGKBool       MapObjectUsesCoordBlock(int nObjType);

    int         GetProjInfo(TABProjInfo *psProjInfo);
    int         SetProjInfo(TABProjInfo *psProjInfo);

	virtual void Dump(FILE *fpOut = NULL);

    // Instead of having over 30 get/set methods, we'll make all data 
    // members public and we will initialize them in the overloaded
    // LoadFromFile().  For this reason, this class should be used with care.

    UGKInt16      m_nMAPVersionNumber;
    UGKInt16      m_nBlockSize;
    
    double      m_dCoordsys2DistUnits;
    UGKInt32      m_nXMin;
    UGKInt32      m_nYMin;
    UGKInt32      m_nXMax;
    UGKInt32      m_nYMax;
    UGKBool       m_bIntBoundsOverflow;  // Set to TRUE if coordinates 
                                       // outside of bounds were written

    UGKInt32      m_nFirstIndexBlock;
    UGKInt32      m_nFirstGarbageBlock;
    UGKInt32      m_nFirstToolBlock;
    UGKInt32      m_numPointObjects;  //点对象数目
    UGKInt32      m_numLineObjects;   //线对象数目
    UGKInt32      m_numRegionObjects; //区域对象数目
    UGKInt32      m_numTextObjects;   //文本对象数目
    UGKInt32      m_nMaxCoordBufSize;  

    UGKByte       m_nDistUnitsCode;       // See Appendix F
    UGKByte       m_nMaxSpIndexDepth;     //索引树的深度
    UGKByte       m_nCoordPrecision;      // Num. decimal places on coord.
    UGKByte       m_nCoordOriginQuadrant;
    UGKByte       m_nReflectXAxisCoord;
    UGKByte       m_nMaxObjLenArrayId;     // See gabyObjLenArray[]
    UGKByte       m_numPenDefs;
    UGKByte       m_numBrushDefs;
    UGKByte       m_numSymbolDefs;
    UGKByte       m_numFontDefs;
    UGKInt16      m_numMapToolBlocks;

    double      m_XScale;
    double      m_YScale;
    double      m_XDispl;
    double      m_YDispl;
};

#endif