/*
 * 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 IMPIED, 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 ___BltGrAxis_h__
#define ___BltGrAxis_h__

#include <tk.h>

extern "C" {
#include "bltChain.h"
};

#include "bltGrMisc.h"
#include "bltGrText.h"
#include "bltGrPSOutput.h"

namespace Blt {
  class Graph;
  class Postscript;

  typedef struct {
    int axis;
    int t1;
    int t2;
    int label;
  } AxisInfo;

  typedef struct {
    const char* name;
    ClassId classId;
  } AxisName;

  extern AxisName axisNames[];

  typedef struct {
    Dashes dashes;
    int lineWidth;
    XColor* color;
    GC gc;
    Segment2d *segments;
    int nUsed;
    int nAllocated;
  } Grid;

  typedef struct {
    double min;
    double max;
    double range;
    double scale;
  } AxisRange;

  typedef struct {
    Point2d anchorPos;
    unsigned int width;
    unsigned int height;
    char string[1];
  } TickLabel;

  typedef struct {
    int nTicks;
    double values[1];
  } Ticks;

  typedef struct {
    double initial;
    double step;
    int nSteps;
  } TickSweep;

  typedef struct {
    const char** tags;
    int checkLimits;
    int exterior;
    int showGrid;
    int showGridMinor;
    int hide;
    int showTicks;

    double windowSize;
    const char *formatCmd;
    int descending;
    int labelOffset;
    TextStyleOptions limitsTextStyle;
    const char *limitsFormat;
    int lineWidth;
    int logScale;
    int looseMin;
    int looseMax;
    Ticks* t1UPtr;
    Ticks* t2UPtr;
    double reqMin;
    double reqMax;
    Tcl_Obj *scrollCmdObjPtr;
    int scrollUnits;
    double reqScrollMin;
    double reqScrollMax;
    double shiftBy;
    double reqStep;
    int reqNumMajorTicks;
    int reqNumMinorTicks;
    int tickLength;
    const char *title;
    int titleAlternate;

    XColor* activeFgColor;
    int activeRelief;
    Tk_3DBorder normalBg;
    int borderWidth;
    XColor* tickColor;
    Grid major;
    Grid minor;
    Tk_Justify titleJustify;
    int relief;
    double tickAngle;	
    Tk_Anchor reqTickAnchor;
    Tk_Font tickFont;
    Tk_Font titleFont;
    XColor* titleColor;
  } AxisOptions;

  class Axis {
  protected:
    Tk_OptionTable optionTable_;
    void* ops_;

  public:
    Graph* graphPtr_;
    ClassId classId_;
    const char* name_;
    const char* className_;

    Tcl_HashEntry* hashPtr_;
    int refCount_;
    int use_;
    int active_;		

    Blt_ChainLink link;
    Blt_Chain chain;

    Point2d titlePos_;
    unsigned short int titleWidth_;
    unsigned short int titleHeight_;	
    double min_;
    double max_;
    double scrollMin_;
    double scrollMax_;
    AxisRange valueRange_;
    AxisRange axisRange_;
    double prevMin_;
    double prevMax_;
    Ticks* t1Ptr_;
    Ticks* t2Ptr_;
    TickSweep minorSweep_;
    TickSweep majorSweep_;

    int margin_;
    Segment2d *segments_;
    int nSegments_;
    Blt_Chain tickLabels_;
    short int left_;
    short int right_;
    short int top_;
    short int bottom_;
    short int width_;
    short int height_;
    short int maxTickWidth_;
    short int maxTickHeight_; 
    Tk_Anchor tickAnchor_;
    GC tickGC_;
    GC activeTickGC_;
    double titleAngle_;	
    Tk_Anchor titleAnchor_;
    double screenScale_;
    int screenMin_;
    int screenRange_;

  protected:
    double niceNum(double, int);
    void setRange(AxisRange*, double, double);
    void makeGridLine(double, Segment2d*);
    void makeSegments(AxisInfo*);
    void resetTextStyles();
    void makeLine(int, Segment2d*);
    void makeTick(double, int, int, Segment2d*);
    void offsets(int, int, AxisInfo*);
    void updateScrollbar(Tcl_Interp*, Tcl_Obj*, int, int, int);

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

    Tk_OptionTable optionTable() {return optionTable_;}
    void* ops() {return ops_;}
    ClassId classId() {return classId_;}
    const char* className() {return className_;}

    int configure();
    void map(int, int);
    void draw(Drawable);
    void drawGrids(Drawable);
    void drawLimits(Drawable);
    void print(PSOutput*);
    void printGrids(PSOutput*);
    void printLimits(PSOutput*);

    void mapStacked(int, int);
    void mapGridlines();
    void setClass(ClassId);
    void logScale(double, double);
    void linearScale(double, double);
    void fixRange();
    int isHorizontal();
    void freeTickLabels();
    TickLabel* makeLabel(double);
    void getDataLimits(double, double);
    Ticks* generateTicks(TickSweep*);
    int inRange(double, AxisRange*);
    void getGeometry();

    double invHMap(double x);
    double invVMap(double y);
    double hMap(double x);
    double vMap(double y);
  };
};

#endif