src/adg/adg-trail.h

   1 /* ADG - Automatic Drawing Generation
   2  * Copyright (C) 2007-2021  Nicola Fontana <ntd at entidi.it>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA  02110-1301, USA.
  18  */
  19
  20
  21 #if !defined(__ADG_H__)
  22 #error "Only <adg.h> can be included directly."
  23 #endif
  24
  25
  26 #ifndef __ADG_TRAIL_H__
  27 #define __ADG_TRAIL_H__
  28
  29
  30 G_BEGIN_DECLS
  31
  32 #define ADG_TYPE_TRAIL             (adg_trail_get_type())
  33 #define ADG_TRAIL(obj)             (G_TYPE_CHECK_INSTANCE_CAST((obj), ADG_TYPE_TRAIL, AdgTrail))
  34 #define ADG_TRAIL_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST((klass), ADG_TYPE_TRAIL, AdgTrailClass))
  35 #define ADG_IS_TRAIL(obj)          (G_TYPE_CHECK_INSTANCE_TYPE((obj), ADG_TYPE_TRAIL))
  36 #define ADG_IS_TRAIL_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE((klass), ADG_TYPE_TRAIL))
  37 #define ADG_TRAIL_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS((obj), ADG_TYPE_TRAIL, AdgTrailClass))
  38
  39
  40 typedef struct _AdgTrail        AdgTrail;
  41 typedef struct _AdgTrailClass   AdgTrailClass;
  42 typedef cairo_path_t * (*AdgTrailCallback) (AdgTrail *trail, gpointer user_data);
  43
  44 struct _AdgTrail {
  45     /*< private >*/
  46     AdgModel        parent;
  47 };
  48
  49 struct _AdgTrailClass {
  50     /*< private >*/
  51     AdgModelClass   parent_class;
  52
  53     /*< public >*/
  54     /* Virtual table */
  55     cairo_path_t *  (*get_cairo_path)           (AdgTrail        *trail);
  56 };
  57
  58
  59 GType               adg_trail_get_type          (void);
  60 AdgTrail *          adg_trail_new               (AdgTrailCallback callback,
  61                                                  gpointer         user_data);
  62
  63 const cairo_path_t *adg_trail_get_cairo_path    (AdgTrail        *trail);
  64 cairo_path_t *      adg_trail_cairo_path        (AdgTrail        *trail);
  65 guint               adg_trail_n_segments        (AdgTrail        *trail);
  66 gboolean            adg_trail_put_segment       (AdgTrail        *trail,
  67                                                  guint            n_segment,
  68                                                  CpmlSegment     *segment);
  69 const CpmlExtents * adg_trail_get_extents       (AdgTrail        *trail);
  70 void                adg_trail_dump              (AdgTrail        *trail);
  71 void                adg_trail_set_max_angle     (AdgTrail        *trail,
  72                                                  gdouble          angle);
  73 gdouble             adg_trail_get_max_angle     (AdgTrail        *trail);
  74
  75 G_END_DECLS
  76
  77
  78 #endif /* __ADG_TRAIL_H__ */