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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.
*/
#include <config.h>
#include <stdio.h>
#include <string.h> /* memcpy() */
#include <assert.h>
#include "connection.h"
#include "message.h"
ObjectChange*
connection_move_handle(Connection *conn, HandleId id,
Point *to, ConnectionPoint *cp,
HandleMoveReason reason, ModifierKeys modifiers)
{
switch(id) {
case HANDLE_MOVE_STARTPOINT:
conn->endpoints[0] = *to;
break;
case HANDLE_MOVE_ENDPOINT:
conn->endpoints[1] = *to;
break;
default:
message_error("Internal error in connection_move_handle.\n");
break;
}
return NULL;
}
void
connection_update_handles(Connection *conn)
{
conn->endpoint_handles[0].id = HANDLE_MOVE_STARTPOINT;
conn->endpoint_handles[0].pos = conn->endpoints[0];
conn->endpoint_handles[1].id = HANDLE_MOVE_ENDPOINT;
conn->endpoint_handles[1].pos = conn->endpoints[1];
}
void
connection_update_boundingbox(Connection *conn)
{
assert(conn != NULL);
line_bbox(&conn->endpoints[0],&conn->endpoints[1],
&conn->extra_spacing,&conn->object.bounding_box);
}
/* Needs to have at least 2 handles
The two first of each are used. */
void
connection_init(Connection *conn, int num_handles, int num_connections)
{
DiaObject *obj;
int i;
obj = &conn->object;
assert(num_handles>=2);
object_init(obj, num_handles, num_connections);
assert(obj->handles!=NULL);
for (i=0;i<2;i++) {
obj->handles[i] = &conn->endpoint_handles[i];
obj->handles[i]->type = HANDLE_MAJOR_CONTROL;
obj->handles[i]->connect_type = HANDLE_CONNECTABLE;
obj->handles[i]->connected_to = NULL;
}
}
void
connection_copy(Connection *from, Connection *to)
{
int i;
DiaObject *toobj;
DiaObject *fromobj;
toobj = &to->object;
fromobj = &from->object;
object_copy(fromobj, toobj);
for (i=0;i<2;i++) {
to->endpoints[i] = from->endpoints[i];
}
for (i=0;i<2;i++) {
/* handles: */
to->endpoint_handles[i] = from->endpoint_handles[i];
to->endpoint_handles[i].connected_to = NULL;
toobj->handles[i] = &to->endpoint_handles[i];
}
memcpy(&to->extra_spacing,&from->extra_spacing,sizeof(to->extra_spacing));
}
void
connection_destroy(Connection *conn)
{
object_destroy(&conn->object);
}
void
connection_save(Connection *conn, ObjectNode obj_node)
{
AttributeNode attr;
object_save(&conn->object, obj_node);
attr = new_attribute(obj_node, "conn_endpoints");
data_add_point(attr, &conn->endpoints[0]);
data_add_point(attr, &conn->endpoints[1]);
}
void
connection_load(Connection *conn, ObjectNode obj_node)
{
AttributeNode attr;
DataNode data;
object_load(&conn->object, obj_node);
attr = object_find_attribute(obj_node, "conn_endpoints");
if (attr != NULL) {
data = attribute_first_data(attr);
data_point( data , &conn->endpoints[0] );
data = data_next(data);
data_point( data , &conn->endpoints[1] );
}
}
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