tabellipse.h

linux下一款GIS程序源码

// tabellipse.h: interface for the TABEllipse class.
//
/*---------------------------------------------------------------------
 *                      class TABEllipse
 *
 * Feature class to handle the MapInfo ellipse types:
 *
 *     TAB_GEOM_ELLIPSE_C      0x19
 *     TAB_GEOM_ELLIPSE        0x1a
 *
 * An ellipse is defined by the coords of its 2 opposite corners (the MBR)
 *
 * Feature geometry can be either an UGKPoint defining the center of the
 * ellipse, or an UGKPolygon defining the ellipse itself.
 *
 * When an ellipse is read, the returned geometry is a UGKPolygon representing
 * the ellipse with 2 degrees line segments.
 *
 * In the case of the UGKPoint, then the X/Y Radius MUST be set, but.  
 * However with an UGKPolygon, if the X/Y radius are not set (== 0) then
 * the MBR of the polygon will be used to define the ellipse parameters 
 * and the center of the MBR is used as the center of the ellipse... 
 * (i.e. the polygon vertices themselves will be ignored).
 *--------------------------------------------------------------------*/

#ifndef  TABEllipse_H
#define  TABEllipse_H

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

class TABEllipse : 
	public TABFeature, 
	public TABFeaturePen, 
	public TABFeatureBrush  
{
public:
	TABEllipse(UGKFeatureDefn *poDefnIn);
	virtual ~TABEllipse();

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

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

    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);

    // MapInfo-specific attributes... made available through public vars
    // for now.
    double      m_dCenterX;
    double      m_dCenterY;
    double      m_dXRadius;
    double      m_dYRadius;

};

#endif