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/*
* UltraStar Deluxe - Karaoke Game
*
* UltraStar Deluxe is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include <cstddef>
#include "control.hpp"
namespace usdx
{
Control::Control(Control *owner)
: owner(owner)
{
if (owner) {
owner->add_slave(this);
}
}
Control::~Control()
{
// you need the next iterator to be able to produce the next value after
// removing it (each control, will be issue a request to remove it self
// from the list)
for (std::list<const Control*>::iterator next = slaves.begin(),
it = next++; it != slaves.end(); it = next++) {
delete *it;
}
slaves.clear();
// remove object from owners list, to avoid double free
set_owner(NULL);
}
void Control::set_owner(Control *owner)
{
if (this->owner != owner) {
if (this->owner) {
this->owner->remove_slave(this);
}
this->owner = owner;
if (this->owner) {
this->owner->add_slave(this);
}
}
}
const Control* Control::get_owner(void) const
{
return owner;
}
void Control::add_slave(const Control *new_slave)
{
slaves.push_back(new_slave);
}
void Control::remove_slave(const Control *slave)
{
slaves.remove(slave);
}
}
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