tabmaptoolblock.h

linux下一款GIS程序源码

// tabmaptoolblock.h: interface for the TABMAPToolBlock class.
//
/*---------------------------------------------------------------------
 *                      class TABMAPToolBlock
 *
 * Class to handle Read/Write operation on .MAP Drawing Tool Blocks (Type 05)
 *
 * In addition to handling the I/O, this class also maintains the list 
 * of Tool definitions in memory.
 *--------------------------------------------------------------------*/

#ifndef  TABMAPToolBlock_H
#define  TABMAPToolBlock_H


#include "tabrawbinblock.h"
#include "tabbinblockmanager.h"

class TABMAPToolBlock : public TABRawBinBlock  
{
protected:
    int         m_numDataBytes; /* Excluding first 8 bytes header */
    UGKInt32      m_nNextToolBlock;
    int         m_numBlocksInChain;

	TABBinBlockManager *m_poBlockManagerRef;

public:
	TABMAPToolBlock(TABAccess eAccessMode = TABRead);
	virtual ~TABMAPToolBlock();

    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 CommitToFile();

	virtual int GetBlockClass() { return TABMAP_TOOL_BLOCK; };

    void        SetMAPBlockManagerRef(TABBinBlockManager *poBlockManager);
    virtual int ReadBytes(int numBytes, UGKByte *pabyDstBuf);
    virtual int WriteBytes(int nBytesToWrite, UGKByte *pBuf);

	void        SetNextToolBlock(UGKInt32 nNextCoordBlockAddress);

    UGKBool       EndOfChain();
    int         GetNumBlocksInChain() { return m_numBlocksInChain; };

	int         CheckAvailableSpace(int nToolType);

	virtual void Dump(FILE *fpOut = NULL);
};

#endif