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/* Dia -- an diagram creation/manipulation program
* Copyright (C) 1999 Alexander Larsson
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef POLYSHAPE_H
#define POLYSHAPE_H
#include "diatypes.h"
#include "object.h"
#include "boundingbox.h"
#define HANDLE_CORNER (HANDLE_CUSTOM1)
/*!
* \brief Helper class for polygon shaped objects
*
* This is a subclass of DiaObject used to help implementing objects
* that form a polygon-like shape of line-segments.
*
* \extends _DiaObject
*/
struct _PolyShape {
/* DiaObject must be first because this is a 'subclass' of it. */
DiaObject object;
int numpoints; /* >= 3 */
Point *points;
ElementBBExtras extra_spacing;
};
void polyshape_update_data(PolyShape *poly);
void polyshape_update_boundingbox(PolyShape *poly);
void polyshape_init(PolyShape *poly, int num_points);
void polyshape_set_points(PolyShape *poly, int num_points, Point *points);
void polyshape_destroy(PolyShape *poly);
void polyshape_copy(PolyShape *from, PolyShape *to);
void polyshape_save(PolyShape *poly, ObjectNode obj_node, DiaContext *ctx);
void polyshape_load(PolyShape *poly, ObjectNode obj_node, DiaContext *ctx); /* NOTE: Does object_init() */
ObjectChange *polyshape_add_point(PolyShape *poly, int segment, Point *point);
ObjectChange *polyshape_remove_point(PolyShape *poly, int point);
ObjectChange *polyshape_move_handle(PolyShape *poly, Handle *id,
Point *to, ConnectionPoint *cp,
HandleMoveReason reason,
ModifierKeys modifiers);
ObjectChange *polyshape_move(PolyShape *poly, Point *to);
real polyshape_distance_from(PolyShape *poly, Point *point,
real line_width);
Handle *polyshape_closest_handle(PolyShape *poly, Point *point);
int polyshape_closest_segment(PolyShape *poly, Point *point,
real line_width);
#define POLYSHAPE_COMMON_PROPERTIES \
OBJECT_COMMON_PROPERTIES, \
{ "poly_points", PROP_TYPE_POINTARRAY, 0, "polyshape points", NULL} \
#define POLYSHAPE_COMMON_PROPERTIES_OFFSETS \
OBJECT_COMMON_PROPERTIES_OFFSETS, \
{ "poly_points", PROP_TYPE_POINTARRAY, \
offsetof(PolyShape,points), offsetof(PolyShape,numpoints)} \
#endif /* POLY_CONN_H */
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