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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 POLY_CONN_H
#define POLY_CONN_H
#include "diatypes.h"
#include "object.h"
#include "boundingbox.h"
#define HANDLE_CORNER (HANDLE_CUSTOM1)
/*!
* \brief helper for implementing polyline connections
*
* This is a subclass of DiaObject used to help implementing objects
* that connect points with polygonal line-segments.
*
* \extends _DiaObject
*/
struct _PolyConn {
/* DiaObject must be first because this is a 'subclass' of it. */
DiaObject object;
int numpoints; /* >= 2 */
Point *points;
PolyBBExtras extra_spacing;
};
void polyconn_update_data(PolyConn *poly);
void polyconn_update_boundingbox(PolyConn *poly);
void polyconn_init(PolyConn *poly, int num_points);
void polyconn_set_points(PolyConn *poly, int num_points, Point *points);
void polyconn_destroy(PolyConn *poly);
void polyconn_copy(PolyConn *from, PolyConn *to);
void polyconn_save(PolyConn *poly, ObjectNode obj_node, DiaContext *ctx);
void polyconn_load(PolyConn *poly, ObjectNode obj_node, DiaContext *ctx); /* NOTE: Does object_init() */
ObjectChange *polyconn_add_point(PolyConn *poly, int segment, Point *point);
ObjectChange *polyconn_remove_point(PolyConn *poly, int point);
ObjectChange *polyconn_move_handle(PolyConn *poly, Handle *id,
Point *to, ConnectionPoint *cp,
HandleMoveReason reason,
ModifierKeys modifiers);
ObjectChange *polyconn_move(PolyConn *poly, Point *to);
real polyconn_distance_from(PolyConn *poly, Point *point,
real line_width);
Handle *polyconn_closest_handle(PolyConn *poly, Point *point);
int polyconn_closest_segment(PolyConn *poly, Point *point,
real line_width);
/* base property stuff... */
#define POLYCONN_COMMON_PROPERTIES \
OBJECT_COMMON_PROPERTIES, \
{ "poly_points", PROP_TYPE_POINTARRAY, 0, "polconn points", NULL} \
#define POLYCONN_COMMON_PROPERTIES_OFFSETS \
OBJECT_COMMON_PROPERTIES_OFFSETS, \
{ "poly_points", PROP_TYPE_POINTARRAY, \
offsetof(PolyConn,points), offsetof(PolyConn,numpoints)} \
#endif /* POLY_CONN_H */
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