lib/connection.h

   1 /* Dia -- an diagram creation/manipulation program
   2  * Copyright (C) 1998 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 CONNECTION_H
  19 #define CONNECTION_H
  20
  21 #include "diatypes.h"
  22 #include "object.h"
  23 #include "boundingbox.h"
  24
  25 /* This is a subclass of DiaObject used to help implementing objects
  26  * of a line-like type. */
  27 struct _Connection {
  28   /* DiaObject must be first because this is a 'subclass' of it. */
  29   DiaObject object;
  30
  31   Point endpoints[2];
  32   Handle endpoint_handles[2];
  33   LineBBExtras extra_spacing;
  34 };
  35
  36 void connection_update_handles(Connection *conn);
  37 void connection_update_boundingbox(Connection *conn);
  38 void connection_init(Connection *conn,
  39                      int num_handles, int num_connections);
  40 void connection_destroy(Connection *conn);
  41 void connection_copy(Connection *from, Connection *to);
  42 void connection_save(Connection *conn, ObjectNode obj_node);
  43 void connection_load(Connection *conn, ObjectNode obj_node);
  44 ObjectChange* connection_move_handle(Connection *conn, HandleId id,
  45                                      Point *to, ConnectionPoint* cp,
  46                                      HandleMoveReason reason,
  47                                      ModifierKeys modifiers);
  48
  49 /* base property stuff... */
  50 #define CONNECTION_COMMON_PROPERTIES \
  51   OBJECT_COMMON_PROPERTIES, \
  52   { "conn_endpoints", PROP_TYPE_ENDPOINTS, 0, "Connection endpoints", NULL}
  53
  54 #define CONNECTION_COMMON_PROPERTIES_OFFSETS \
  55   OBJECT_COMMON_PROPERTIES_OFFSETS, \
  56   { "conn_endpoints", PROP_TYPE_ENDPOINTS, offsetof(Connection,endpoints)}
  57
  58 #endif /* CONNECTION_H */