/*
 * 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 __BltGrElemLine_h__
#define __BltGrElemLine_h__

#include <tk.h>

#include "bltGrElem.h"
#include "bltGrPenLine.h"

typedef struct {
  Point2d *screenPts;
  int nScreenPts;
  int *styleMap;
  int *map;
} MapInfo;

typedef struct {
  Point2d *points;
  int length;
  int *map;
} GraphPoints;

typedef struct {
  int start;
  GraphPoints screenPts;
} bltTrace;

typedef struct {
  Weight weight;
  LinePen* penPtr;
  GraphPoints symbolPts;
  GraphSegments xeb;
  GraphSegments yeb;
  int symbolSize;
  int errorBarCapWidth;
} LineStyle;

typedef struct {
  Element* elemPtr;
  const char* label;
  char** tags;
  Axis* xAxis;
  Axis* yAxis;
  ElemCoords coords;
  ElemValues* w;
  ElemValues* xError;
  ElemValues* yError;
  ElemValues* xHigh;
  ElemValues* xLow;
  ElemValues* yHigh;
  ElemValues* yLow;
  int hide;
  int legendRelief;
  Blt_Chain stylePalette;
  LinePen *builtinPenPtr;
  LinePen *activePenPtr;
  LinePen *normalPenPtr;
  LinePenOptions builtinPen;

  // derived
  Tk_3DBorder fillBg;
  int reqMaxSymbols;
  double rTolerance;
  int scaleSymbols;
  int reqSmooth;
  int penDir;
} LineElementOptions;

class LineElement : public Element {
 public:
  enum PenDirection {INCREASING, DECREASING, BOTH_DIRECTIONS};
  enum Smoothing {LINEAR, STEP, CUBIC, QUADRATIC, CATROM};

 protected:
  LinePen* builtinPenPtr;
  Smoothing smooth_;
  Point2d *fillPts_;
  int nFillPts_;
  GraphPoints symbolPts_;
  GraphPoints activePts_;
  GraphSegments xeb_;
  GraphSegments yeb_;
  int symbolInterval_;
  int symbolCounter_;
  Blt_Chain traces_;

 protected:
  int scaleSymbol(int);
  void getScreenPoints(MapInfo*);
  void reducePoints(MapInfo*, double);
  void generateSteps(MapInfo*);
  void generateSpline(MapInfo*);
  void generateParametricSpline(MapInfo*);
  void mapSymbols(MapInfo*);
  void mapActiveSymbols();
  void mergePens(LineStyle**);
  int outCode(Region2d*, Point2d*);
  int clipSegment(Region2d*, int, int, Point2d*, Point2d*);
  void saveTrace(int, int, MapInfo*);
  void freeTraces();
  void mapTraces(MapInfo*);
  void mapFillArea(MapInfo*);
  void mapErrorBars(LineStyle**);
  void resetLine();
  int closestTrace();
  void closestPoint(ClosestSearch*);
  void drawCircles(Display*, Drawable, LinePen*, int, Point2d*, int);
  void drawSquares(Display*, Drawable, LinePen*, int, Point2d*, int);
  void drawSymbols(Drawable, LinePen*, int, int, Point2d*);
  void drawTraces(Drawable, LinePen*);
  void drawValues(Drawable, LinePen*, int, Point2d*, int*);
  void setLineAttributes(PostScript*, LinePen*);
  void printTraces(PostScript*, LinePen*);
  void printValues(PostScript*, LinePen*, int, Point2d*, int*);
  void printSymbols(PostScript*, LinePen*, int, int, Point2d*);
  double distanceToLine(int, int, Point2d*, Point2d*, Point2d*);
  double distanceToX(int, int, Point2d*, Point2d*, Point2d*);
  double distanceToY(int, int, Point2d*, Point2d*, Point2d*);
  void getSymbolPostScriptInfo(PostScript*, LinePen*, int);
  int simplify(Point2d*, int, int, double, int*);
  double findSplit(Point2d*, int, int, int*);

 public:
  LineElement(Graph*, const char*, Tcl_HashEntry*);
  virtual ~LineElement();

  ClassId classId() {return CID_ELEM_LINE;}
  const char* className() {return "LineElement";}
  const char* typeName() {return "line";}

  int configure();
  void map();
  void extents(Region2d*);
  void closest();
  void draw(Drawable);
  void drawActive(Drawable);
  void drawSymbol(Drawable, int, int, int);
  void print(PostScript*);
  void printActive(PostScript*);
  void printSymbol(PostScript*, double, double, int);
};

#endif