~ubuntu-branches/ubuntu/gutsy/goocanvas/gutsy

/*

 * GooCanvas. Copyright (C) 2005 Damon Chaplin.

 * Released under the GNU LGPL license. See COPYING for details.

 *

 * goocanvaspolyline.h - polyline item, with optional arrows.

 */

#ifndef __GOO_CANVAS_POLYLINE_H__

#define __GOO_CANVAS_POLYLINE_H__

 

#include <gtk/gtk.h>

#include "goocanvasitemsimple.h"

 

G_BEGIN_DECLS

 

 

/**

 * GooCanvasPoints

 * @coords: the coordinates of the points, in pairs.

 * @num_points: the number of points.

 * @ref_count: the reference count of the struct.

 *

 * #GooCairoPoints represents an array of points.

 */

typedef struct {

  double *coords;

  int num_points;

  int ref_count;

} GooCanvasPoints;

 

#define GOO_TYPE_CANVAS_POINTS goo_canvas_points_get_type()

GType            goo_canvas_points_get_type (void);

GooCanvasPoints* goo_canvas_points_new      (int              num_points);

GooCanvasPoints* goo_canvas_points_ref      (GooCanvasPoints *points);

void             goo_canvas_points_unref    (GooCanvasPoints *points);

 

 

#define GOO_TYPE_CANVAS_POLYLINE            (goo_canvas_polyline_get_type ())

#define GOO_CANVAS_POLYLINE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GOO_TYPE_CANVAS_POLYLINE, GooCanvasPolyline))

#define GOO_CANVAS_POLYLINE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GOO_TYPE_CANVAS_POLYLINE, GooCanvasPolylineClass))

#define GOO_IS_CANVAS_POLYLINE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GOO_TYPE_CANVAS_POLYLINE))

#define GOO_IS_CANVAS_POLYLINE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GOO_TYPE_CANVAS_POLYLINE))

#define GOO_CANVAS_POLYLINE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GOO_TYPE_CANVAS_POLYLINE, GooCanvasPolylineClass))

 

#define NUM_ARROW_POINTS     5          /* number of points in an arrowhead */

 

typedef struct _GooCanvasPolylineArrowData GooCanvasPolylineArrowData;

struct _GooCanvasPolylineArrowData

{

  /* These are specified in multiples of the line width, e.g. if arrow_width

     is 2 the width of the arrow will be twice the width of the line. */

  gdouble arrow_width, arrow_length, arrow_tip_length;

 

  gdouble line_start[2], line_end[2];

  gdouble start_arrow_coords[NUM_ARROW_POINTS * 2];

  gdouble end_arrow_coords[NUM_ARROW_POINTS * 2];

};

 

 

typedef struct _GooCanvasPolyline       GooCanvasPolyline;

typedef struct _GooCanvasPolylineClass  GooCanvasPolylineClass;

 

/**

 * GooCanvasPolyline

 *

 * The #GooCanvasPolyline-struct struct contains private data only.

 */

struct _GooCanvasPolyline

{

  GooCanvasItemSimple parent;

 

  gdouble *coords;

 

  GooCanvasPolylineArrowData *arrow_data;

 

  guint num_points         : 16;

  guint close_path         : 1;

  guint start_arrow        : 1;

  guint end_arrow          : 1;

  guint reconfigure_arrows : 1;

};

 

struct _GooCanvasPolylineClass

{

  GooCanvasItemSimpleClass parent_class;

};

 

 

GType           goo_canvas_polyline_get_type      (void) G_GNUC_CONST;

GooCanvasItem*  goo_canvas_polyline_new           (GooCanvasItem *parent,

                                                   gboolean       close_path,

                                                   gint           num_points,

                                                   ...);

 

GooCanvasItem*  goo_canvas_polyline_new_line      (GooCanvasItem *parent,

                                                   gdouble        x1,

                                                   gdouble        y1,

                                                   gdouble        x2,

                                                   gdouble        y2,

                                                   const gchar   *first_property,

                                                   ...);

 

 

G_END_DECLS

 

#endif /* __GOO_CANVAS_POLYLINE_H__ */