1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/* 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.
*/
/*!
* \file connectionpoint.h -- Connection Points together with Handles allow to connect objects
* \ingroup ObjectConnects
*/
#ifndef CONNECTIONPOINT_H
#define CONNECTIONPOINT_H
#include "diatypes.h"
#include <glib.h>
#include "geometry.h"
/*! \brief Connections directions, used as hints to e.g. zigzaglines
* Ordered this way to let *2 be rotate clockwise, /2 rotate counterclockwise.
* Used as bits
* \ingroup ObjectConnects
*/
typedef enum {
DIR_NONE = 0,
DIR_NORTH = (1<<0),
DIR_EAST = (1<<1),
DIR_SOUTH = (1<<2),
DIR_WEST = (1<<3),
/* Convenience directions */
DIR_NORTHEAST = (DIR_NORTH|DIR_EAST),
DIR_SOUTHEAST = (DIR_SOUTH|DIR_EAST),
DIR_NORTHWEST = (DIR_NORTH|DIR_WEST),
DIR_SOUTHWEST = (DIR_SOUTH|DIR_WEST),
DIR_ALL = (DIR_NORTH|DIR_SOUTH|DIR_EAST|DIR_WEST)
} ConnectionPointDirection;
/*!
* \brief Additional behaviour flags for connection points
* \ingroup ObjectConnects
*/
typedef enum {
CP_FLAG_ANYPLACE = (1<<0), /*!< Set if this connpoint is the one that
is connected to when a connection is
dropped on an object. */
CP_FLAG_AUTOGAP = (1<<1), /*!< Set if this connpoint is internal
and so should force a gap on the lines. */
/*! Most non-connection objects want exactly one CP with this, in the middle. */
CP_FLAGS_MAIN = (CP_FLAG_ANYPLACE|CP_FLAG_AUTOGAP) /*!< Use this for the central CP that
takes connections from all over the
object and has autogap. */
} ConnectionPointFlags;
/*!
* \brief To connect object with other objects handles
* \ingroup ObjectConnects
*/
struct _ConnectionPoint {
Point pos; /*!< position of this connection point */
DiaObject *object; /*!< pointer to the object having this point */
GList *connected; /*!< list of 'DiaObject *' connected to this point*/
guint8 directions; /*!< Directions that this connection point is open to */
guint8 flags; /*!< Flags set for this connpoint. See CP_FLAGS_* above. */
};
/**
* \brief Returns the available directions on a slope.
* The right-hand side of the line is assumed to be within the object,
* and thus not available.
* \ingroup ObjectConnects
*/
gint find_slope_directions(Point from, Point to);
/*!
* \brief Update the object-settable parts of a connectionpoints.
* @param p A ConnectionPoint pointer (non-NULL).
* @param x The x coordinate of the connectionpoint.
* @param y The y coordinate of the connectionpoint.
* @param dirs The directions that are open for connections on this point.
* \ingroup ObjectConnects
*/
void connpoint_update(ConnectionPoint *p, real x, real y, gint dirs);
/*!
* \brief Adaptive rendering to the boundary of the connected object
* \ingroup ObjectConnects
*/
gboolean connpoint_is_autogap(ConnectionPoint *cp);
#endif /* CONNECTIONPOINT_H */
|
