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/* Dia -- an diagram creation/manipulation program
* Copyright (C) 1998 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 CONNECTION_H
#define CONNECTION_H
#include "diatypes.h"
#include "object.h"
#include "boundingbox.h"
/*!
* \brief Base class for simple (straight) lines connecting object
*
* This is a subclass of DiaObject used to help implementing objects
* of a line-like type.
*
* \extends _DiaObject
*/
struct _Connection {
DiaObject object; /*!< inheritance */
Point endpoints[2]; /*!< start and end position */
Handle endpoint_handles[2]; /*!< start and end handles */
LineBBExtras extra_spacing; /*!< calcualted bounding box */
};
void connection_update_handles(Connection *conn);
void connection_update_boundingbox(Connection *conn);
void connection_init(Connection *conn,
int num_handles, int num_connections);
void connection_destroy(Connection *conn);
void connection_copy(Connection *from, Connection *to);
void connection_save(Connection *conn, ObjectNode obj_node, DiaContext *ctx);
void connection_load(Connection *conn, ObjectNode obj_node, DiaContext *ctx);
ObjectChange* connection_move_handle(Connection *conn, HandleId id,
Point *to, ConnectionPoint* cp,
HandleMoveReason reason,
ModifierKeys modifiers);
void connection_adjust_for_autogap(Connection *conn);
/* base property stuff... */
#define CONNECTION_COMMON_PROPERTIES \
OBJECT_COMMON_PROPERTIES, \
{ "conn_endpoints", PROP_TYPE_ENDPOINTS, 0, "Connection endpoints", NULL}
#define CONNECTION_COMMON_PROPERTIES_OFFSETS \
OBJECT_COMMON_PROPERTIES_OFFSETS, \
{ "conn_endpoints", PROP_TYPE_ENDPOINTS, offsetof(Connection,endpoints)}
#endif /* CONNECTION_H */
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