112 lines
3.0 KiB
C++
112 lines
3.0 KiB
C++
/* This file is part of FlowCanvas.
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* Copyright (C) 2007-2009 David Robillard <http://drobilla.net>
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*
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* FlowCanvas is free software; you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* FlowCanvas is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <list>
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#include <boost/weak_ptr.hpp>
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#include <libgnomecanvasmm.h>
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#include "Connectable.hpp"
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#include "Connection.hpp"
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using std::list;
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namespace FlowCanvas {
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/** Update the location of all connections to/from this item if we've moved */
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void
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Connectable::move_connections()
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{
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for (list<boost::weak_ptr<Connection> >::iterator i = _connections.begin(); i != _connections.end(); i++) {
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boost::shared_ptr<Connection> c = i->lock();
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if (c) {
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c->update_location();
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}
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}
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}
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/** Add a Connection to this item.
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*
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* A reference to the connection is not retained (only a weak_ptr is stored).
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*/
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void
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Connectable::add_connection(boost::shared_ptr<Connection> connection)
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{
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/*if (is_output())
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assert(connection->source().lock().get() == this);
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else if (is_input())
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assert(connection->dest().lock().get() == this);*/
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assert(connection->source().lock().get() == this
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|| connection->dest().lock().get() == this);
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for (list<boost::weak_ptr<Connection> >::iterator i = _connections.begin(); i != _connections.end(); i++) {
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boost::shared_ptr<Connection> c = (*i).lock();
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if (c && c == connection)
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return;
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}
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_connections.push_back(connection);
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}
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/** Remove a Connection from this item.
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*
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* Cuts all references to @a c held by the Connectable.
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*/
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void
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Connectable::remove_connection(boost::shared_ptr<Connection> c)
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{
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for (list<boost::weak_ptr<Connection> >::iterator i = _connections.begin(); i != _connections.end(); i++) {
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boost::shared_ptr<Connection> connection = i->lock();
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if (connection && connection == c) {
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_connections.erase(i);
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break;
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}
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}
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}
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void
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Connectable::raise_connections()
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{
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for (list<boost::weak_ptr<Connection> >::iterator i = _connections.begin(); i != _connections.end(); ++i) {
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boost::shared_ptr<Connection> connection = (*i).lock();
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if (connection)
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connection->raise_to_top();
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}
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}
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bool
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Connectable::is_connected_to(boost::shared_ptr<Connectable> other)
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{
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for (list<boost::weak_ptr<Connection> >::iterator i = _connections.begin(); i != _connections.end(); ++i) {
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boost::shared_ptr<Connection> connection = (*i).lock();
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if (connection->source().lock() == other || connection->dest().lock() == other)
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return true;
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}
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return false;
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}
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} // namespace FlowCanvas
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