tabregion.h

linux下一款GIS程序源码

// tabregion.h: interface for the TABRegion class.
//
/*---------------------------------------------------------------------
 *                      class TABRegion
 *
 * Feature class to handle the MapInfo region types:
 *
 *     TAB_GEOM_REGION_C         0x0d
 *     TAB_GEOM_REGION           0x0e
 *     TAB_GEOM_V450_REGION_C    0x2e
 *     TAB_GEOM_V450_REGION      0x2f
 *
 * Feature geometry will be returned as UGKPolygon (with a single ring)
 * or UGKMultiPolygon (for multiple rings).
 *
 * REGIONs with multiple rings are returned as UGKMultiPolygon instead of
 * as UGKPolygons since UGKPolygons require that the first ring be the
 * outer ring, and the other all be inner rings, but this is not guaranteed
 * inside MapInfo files.  However, when writing features, UGKPolygons with
 * multiple rings will be accepted without problem.
 *--------------------------------------------------------------------*/

#ifndef  TABRegion_H
#define  TABRegion_H


#include "tabfeaturepen.h"
#include "tabfeature.h"
#include "tabfeaturebrush.h"
#include "ugkpolygon.h"
#include "ugklinearring.h"

class TABRegion : 
	public TABFeature, 
	public TABFeaturePen, 
	public TABFeatureBrush  
{
		UGKBool       m_bSmooth;
private:
	UGKBool       m_bCenterIsSet;
	double      m_dCenterX, m_dCenterY;

    int     ComputeNumRings(TABMAPCoordSecHdr **ppasSecHdrs, 
                            TABMAPFile *poMAPFile);
    int     AppendSecHdrs(UGKPolygon *poPolygon,
                          TABMAPCoordSecHdr * &pasSecHdrs,
                          TABMAPFile *poMAPFile,
                          int &iLastRing);
public:
	TABRegion(UGKFeatureDefn *poDefnIn);
	virtual ~TABRegion();

    virtual TABFeatureClass GetFeatureClass() { return TABFCRegion; };
    virtual int             ValidateMapInfoType(TABMAPFile *poMapFile = NULL);

	virtual TABFeature *CloneTABFeature(UGKFeatureDefn *poNewDefn = NULL );

    int                 GetNumRings();
    UGKLinearRing      *GetRingRef(int nRequestedRingIndex);
    UGKBool               IsInteriorRing(int nRequestedRingIndex);

    virtual int ReadGeometryFromMAPFile(TABMAPFile *poMapFile, TABMAPObjHdr *);
    virtual int WriteGeometryToMAPFile(TABMAPFile *poMapFile, TABMAPObjHdr *);

    virtual int ReadGeometryFromMIFFile(MIDDATAFile *fp);
    virtual int WriteGeometryToMIFFile(MIDDATAFile *fp);

	virtual const char *GetStyleString();

	virtual void DumpMIF(FILE *fpOut = NULL);

    int         GetCenter(double &dX, double &dY);
    void        SetCenter(double dX, double dY);
};

#endif