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+/*
+ * 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 "tkbltGraph.h"
+#include "tkbltGrElem.h"
+#include "tkbltGrPenLine.h"
+
+namespace Blt {
+
+ 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;
+ 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_;
+ Chain* traces_;
+
+ void drawCircle(Display*, Drawable, LinePen*, int, Point2d*, int);
+ void drawSquare(Display*, Drawable, LinePen*, int, Point2d*, int);
+ void drawSCross(Display*, Drawable, LinePen*, int, Point2d*, int);
+ void drawCross(Display*, Drawable, LinePen*, int, Point2d*, int);
+ void drawDiamond(Display*, Drawable, LinePen*, int, Point2d*, int);
+ void drawArrow(Display*, Drawable, LinePen*, int, Point2d*, int);
+
+ 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 reset();
+ int closestTrace();
+ void closestPoint(ClosestSearch*);
+ void drawSymbols(Drawable, LinePen*, int, int, Point2d*);
+ void drawTraces(Drawable, LinePen*);
+ void drawValues(Drawable, LinePen*, int, Point2d*, int*);
+ void setLineAttributes(PSOutput*, LinePen*);
+ void printTraces(PSOutput*, LinePen*);
+ void printValues(PSOutput*, LinePen*, int, Point2d*, int*);
+ void printSymbols(PSOutput*, 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*);
+ int simplify(Point2d*, int, int, double, int*);
+ double findSplit(Point2d*, int, int, int*);
+
+ int naturalSpline(Point2d*, int, Point2d*, int);
+ int quadraticSpline(Point2d*, int, Point2d*, int);
+ int naturalParametricSpline(Point2d*, int, Region2d*, int, Point2d*, int);
+ int catromParametricSpline(Point2d*, int, Point2d*, 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(PSOutput*);
+ void printActive(PSOutput*);
+ void printSymbol(PSOutput*, double, double, int);
+ };
+};
+
+#endif