lib/polyshape.h

   1 /* Dia -- an diagram creation/manipulation program
   2  * Copyright (C) 1999 Alexander Larsson
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program 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
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17  */
  18 #ifndef POLYSHAPE_H
  19 #define POLYSHAPE_H
  20
  21 #include "diatypes.h"
  22 #include "object.h"
  23 #include "boundingbox.h"
  24
  25 #define HANDLE_CORNER (HANDLE_CUSTOM1)
  26
  27 /* This is a subclass of DiaObject used to help implementing objects
  28  * that form a polygon-like shape of line-segments.
  29  */
  30 struct _PolyShape {
  31   /* DiaObject must be first because this is a 'subclass' of it. */
  32   DiaObject object;
  33
  34   int numpoints; /* >= 3 */
  35   Point *points;
  36
  37   ElementBBExtras extra_spacing;
  38 };
  39
  40 void polyshape_update_data(PolyShape *poly);
  41 void polyshape_update_boundingbox(PolyShape *poly);
  42 void polyshape_simple_draw(PolyShape *poly, DiaRenderer *renderer, real width);
  43 void polyshape_init(PolyShape *poly, int num_points);
  44 void polyshape_set_points(PolyShape *poly, int num_points, Point *points);
  45 void polyshape_destroy(PolyShape *poly);
  46 void polyshape_copy(PolyShape *from, PolyShape *to);
  47 void polyshape_save(PolyShape *poly, ObjectNode obj_node);
  48 void polyshape_load(PolyShape *poly, ObjectNode obj_node);  /* NOTE: Does object_init() */
  49 ObjectChange *polyshape_add_point(PolyShape *poly, int segment, Point *point);
  50 ObjectChange *polyshape_remove_point(PolyShape *poly, int point);
  51 ObjectChange *polyshape_move_handle(PolyShape *poly, Handle *id,
  52                                     Point *to, ConnectionPoint *cp,
  53                                     HandleMoveReason reason,
  54                                     ModifierKeys modifiers);
  55 ObjectChange *polyshape_move(PolyShape *poly, Point *to);
  56 real polyshape_distance_from(PolyShape *poly, Point *point,
  57                              real line_width);
  58 Handle *polyshape_closest_handle(PolyShape *poly, Point *point);
  59 int polyshape_closest_segment(PolyShape *poly, Point *point,
  60                               real line_width);
  61
  62 #define POLYSHAPE_COMMON_PROPERTIES \
  63   OBJECT_COMMON_PROPERTIES, \
  64   { "poly_points", PROP_TYPE_POINTARRAY, 0, "polyshape points", NULL} \
  65
  66 #define POLYSHAPE_COMMON_PROPERTIES_OFFSETS \
  67   OBJECT_COMMON_PROPERTIES_OFFSETS, \
  68   { "poly_points", PROP_TYPE_POINTARRAY, \
  69      offsetof(PolyShape,points), offsetof(PolyShape,numpoints)} \
  70
  71 #endif /* POLY_CONN_H */