Merge commit '0b821003340a9b821326d67e7474eb2e24f7ecec' as 'tkblt'

1 files changed, 184 insertions, 0 deletions

diff --git a/tkblt/generic/tkbltGrElemLine.h b/tkblt/generic/tkbltGrElemLine.h
new file mode 100644
index 0000000..f937615
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+++ b/tkblt/generic/tkbltGrElemLine.h
@@ -0,0 +1,184 @@
+/*
+ * 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