#ifndef __XGALAXY_H__
#define __XGALAXY_H__

#include <gtk/gtk.h>
#include <pthread.h>
#include "galaxy.h"

typedef struct {
        double  mass;
        Vector  c; /* coordinate */
        Vector  v; /* velocity */
} StarEntry;

typedef struct {
	Vector  d;
    	double	w;
} Quaternion;

typedef struct {
	GtkWidget	*window;

	GtkWidget	*deltaField;
	GtkWidget	*errorField;
	GtkWidget	*dataField;

	GtkWidget	*dataEnergyField;
	GtkWidget	*dataImpulseField;
	GtkWidget	*dataMomentField;

	GtkWidget	*resEnergyField;
	GtkWidget	*resImpulseField;
	GtkWidget	*resMomentField;
	GtkWidget	*resDeltaField;
	GtkWidget	*resTimeField;
	GtkWidget	*resField;

	GtkWidget	*notebook;

	GtkWidget	*XSlider;
	GtkWidget	*YSlider;
	GtkWidget	*ZSlider;
	double		Xangle;
	double		Yangle;
	double		Zangle;
	Quaternion		angle;
	double		Scale;

	GtkWidget	*drawing_area;
	GdkPixmap 	*pixmap;

	GtkWidget	*buttonRun;
	GtkWidget	*buttonPause;

	Galaxy		galaxy;
	
	char		*filename;

	u_int32_t	nentry;	
	u_int32_t	lenentry;	
	Star 		*entry;
	Star 		*tmpentry;


	/* state */
	volatile u_int32_t
		runing:1,
		paused:1,
		request_to_exit:1,
		page_active:4,
		trace:1,
		locksignal:1,
		drawaxis:1,
		unused:22;

	double	scaleX;	
	double	scaleY;

	pthread_mutex_t  mutex;
	pthread_t	 thread;	

	double	runTime;

	double beginx;
	double beginy;
	Quaternion motion;
} XGlalaxyStruct;

#define XG_TIME_TICK	(20)

extern XGlalaxyStruct XGalaxy;

/*entry*/
void freeStarEntry();
void addEntry(Star *star);
void deleteEntry(u_int32_t i);
void editEntry(u_int32_t i, int col, double val);
void cntEntry();

void galaxy_set_title();
/* menu action */
gboolean show_resCList( GtkWidget *w, GdkEventExpose *event, gpointer   data );
void clearData( GtkWidget *w, gpointer   data );
void saveAsFile( GtkWidget *w, gpointer   data );
void saveFile( GtkWidget *w, gpointer   data );
void openFile( GtkWidget *w, gpointer   data );
void showAbout(  GtkWidget *w, gpointer   data );
void actionRun( GtkWidget *w, gpointer   data );
void actionPause( GtkWidget *w, gpointer   data );
void actionStop( GtkWidget *w, gpointer   data );

/* graphics */
gint expose_event( GtkWidget *widget, GdkEventExpose *event );
gint configure_event( GtkWidget *widget, GdkEventConfigure *event );
void angle_changed(GtkRange *range, gpointer user_data);
void fitGalaxy();
void drawGalaxy();
void drawStars();
void drawAxis();
void clearDraw();
void DrawDisk(GdkGC   *gc, double CenterX, double CenterY, double Radius, double Feather, double brightness);
void antialiasedLine(GdkGC   *gc, int x0, int y0, int x1, int y1, GdkColor *color);
gboolean mouse_motion_notify(GtkWidget      *widget, GdkEventMotion *event);

/*quaternions*/
void vector_vmul(Vector *res, Vector *a, Vector *b);
double vector_smul(Vector *a, Vector *b);
void vector_mul(Vector *res, Vector *a, double b);
void quater_vmul(Quaternion *res, Quaternion *a, Quaternion *b);
void quater_inverse(Quaternion *res, Quaternion *a);
void rotate(Vector *res, Vector *v, Quaternion *q);
void quater_normalize(Quaternion *q);
double vector_length(Vector *v);
void vector_normal(Vector *v);
void vector_add(Vector *res, Vector *a, Vector *b);
void vector_sub(Vector *res, Vector *a, Vector *b);
double quater_length(Quaternion *a);
void quater_to_matrix( Quaternion *q, double m[3][3]  );
void matrix_to_quater(  double m[3][3], Quaternion *q );
void quater_to_angles( Quaternion *q, Vector *a);
#endif