1 /* Dia -- an diagram creation/manipulation program
2 * Copyright (C) 1998 Alexander Larsson
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.
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.
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.
18 #ifndef CONNECTIONPOINT_H
19 #define CONNECTIONPOINT_H
24 #define CONNECTIONPOINT_SIZE 5
25 #define CHANGED_TRESHOLD 0.001
30 /* Connections directions, used as hints to zigzaglines */
31 /* Ordered this way to let *2 be rotate clockwise, /2 rotate counterclockwise.
38 /* Convenience directions */
39 #define DIR_NORTHEAST DIR_NORTH|DIR_EAST
40 #define DIR_SOUTHEAST DIR_SOUTH|DIR_EAST
41 #define DIR_NORTHWEST DIR_NORTH|DIR_WEST
42 #define DIR_SOUTHWEST DIR_SOUTH|DIR_WEST
44 #define DIR_ALL DIR_NORTH|DIR_SOUTH|DIR_EAST|DIR_WEST
46 struct _ConnectionPoint
{
47 Point pos
; /* position of this connection point */
48 Point last_pos
; /* Used by update_connections_xxx only. */
49 DiaObject
*object
; /* pointer to the object having this point */
50 GList
*connected
; /* list of 'DiaObject *' connected to this point*/
51 gchar directions
; /* Directions that this connection point is open to */
52 gchar
*name
; /* Name of this connpoint, NULL means uses number only.*/
55 /* Returns the available directions on a slope.
56 * The right-hand side of the line is assumed to be within the object,
57 * and thus not available. */
58 gint
find_slope_directions(Point from
, Point to
);
59 /** Update the object-settable parts of a connectionpoints.
60 * p: A ConnectionPoint pointer (non-NULL).
61 * x: The x coordinate of the connectionpoint.
62 * y: The y coordinate of the connectionpoint.
63 * dirs: The directions that are open for connections on this point.
65 void connpoint_update(ConnectionPoint
*p
, real x
, real y
, gint dirs
);
67 #endif /* CONNECTIONPOINT_H */