/*
 * Smithsonian Astrophysical Observatory, Cambridge, MA, USA
 * This code has been modified under the terms listed below and is made
 * available under the same terms.
 */

/*
 *	Copyright 1993-2004 George A Howlett.
 *
 *	Permission is hereby granted, free of charge, to any person obtaining
 *	a copy of this software and associated documentation files (the
 *	"Software"), to deal in the Software without restriction, including
 *	without limitation the rights to use, copy, modify, merge, publish,
 *	distribute, sublicense, and/or sell copies of the Software, and to
 *	permit persons to whom the Software is furnished to do so, subject to
 *	the following conditions:
 *
 *	The above copyright notice and this permission notice shall be
 *	included in all copies or substantial portions of the Software.
 *
 *	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *	EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *	NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *	LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *	OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *	WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef _BLT_GR_MARKER_POLYGON_H
#define _BLT_GR_MARKER_POLYGON_H

#include "bltGrMarker.h"

class PolygonMarker {
 public:
  GraphObj obj;			/* Must be first field in marker. */

  MarkerClass *classPtr;

  Tk_OptionTable optionTable;	/* Configuration specifications */
  Tcl_HashEntry *hashPtr;

  Blt_ChainLink link;

  const char* elemName;		/* Element associated with marker. Let's
				 * you link a marker to an element. The
				 * marker is drawn only if the element
				 * is also visible. */
  Axis2d axes;

  Point2d *worldPts;			/* Coordinate array to position
					 * marker. */

  int nWorldPts;			/* Number of points in above array */

  int drawUnder;			/* If non-zero, draw the marker
					 * underneath any elements. This can be
					 * a performance penalty because the
					 * graph must be redraw entirely each
					 * time the marker is redrawn. */

  int clipped;			/* Indicates if the marker is totally
				 * clipped by the plotting area. */

  int hide;
  unsigned int flags;		


  int xOffset, yOffset;		/* Pixel offset from graph position */

  int state;

  // derived

  Point2d *screenPts;			/* Array of points representing the
					 * polygon in screen coordinates. It's
					 * not used for drawing, but to generate
					 * the outlinePts and fillPts arrays
					 * that are the coordinates of the
					 * possibly clipped outline and filled
					 * polygon. */

  XColor* outline;
  XColor* outlineBg;
  XColor* fill;
  XColor* fillBg;

  Pixmap stipple;			/* Stipple pattern to fill the
					 * polygon. */
  int lineWidth;			/* Width of polygon outline. */
  int capStyle;
  int joinStyle;
  Blt_Dashes dashes;			/* List of dash values.  Indicates how
					 * to draw the dashed line.  If no dash
					 * values are provided, or the first
					 * value is zero, then the line is drawn
					 * solid. */

  GC outlineGC;			/* Graphics context to draw the outline
				 * of the polygon. */
  GC fillGC;				/* Graphics context to draw the filled
					 * polygon. */

  Point2d *fillPts;			/* Malloc'ed array of points used to
					 * draw the filled polygon. These points
					 * may form a degenerate polygon after
					 * clipping. */
  int nFillPts;			/* # points in the above array. */
  Segment2d *outlinePts;		/* Malloc'ed array of points.
					 * Represents individual line segments
					 * (2 points per segment) comprising the
					 * outline of the polygon.  The segments
					 * may not necessarily be closed or
					 * connected after clipping. */
  int nOutlinePts;			/* # points in the above array. */
  int xorr;
  int xorState;			/* State of the XOR drawing. Indicates
				 * if the marker is visible. We have to
				 * drawn it again to erase it. */
};

#endif