non/sequencer/src/event.C

/*******************************************************************************/
/* Copyright (C) 2007-2008 Jonathan Moore Liles                                */
/*                                                                             */
/* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
/*******************************************************************************/

/* Higher level event interface, supporting doublely-linked list,
   marking, selection, and linking of note pairs. */

#include "event.H"
#include <stdio.h>
#include <string.h>

void
event::_init ( void )
{
    _link = _next = _prev = NULL;
    _selected = 0;
}

event::event ( void )
{
    _init();
}

event::~event ( void )
{
    _link = _next = _prev = NULL;
}

/* copy constructor */
event::event ( const event &e ) : midievent( e )
{
    _link = _next = _prev = NULL;
    _selected = e._selected;
}

event::event ( const midievent &e ) : midievent( e )
{
    _init();
}


void
event::link ( event *event )
{
    if ( event == NULL )
    {
        if ( _link )
        {
            _link->_link = NULL;
            _link = NULL;
        }
        return;
    }

    _link = event;
    _link->_link = this;
}

event *
event::link ( void ) const
{
    return _link;
}

bool
event::linked ( void ) const
{
    return _link != NULL;
}

void
event::select ( void )
{
    _selected = 1;

    if ( _link )
        _link->_selected = 1;
}

void
event::deselect ( void )
{
    _selected = 0;

    if ( _link )
        _link->_selected = 0;
}

bool
event::selected ( int n ) const
{
    return _selected == n;
}

bool
event::selected ( void ) const
{
    return _selected == 1;
}

/* override this so we can update linked event */
void
event::note ( char note )
{
    midievent::note( note );

    if ( _link )
        _link->midievent::note( note );
}

/* stupid C++ makes us override the all polymorphic functions... */
unsigned char
event::note ( void ) const
{
    return midievent::note();
}

tick_t
event::note_duration ( void ) const
{
    return _link ? _link->timestamp() - timestamp() : 0;
}

void
event::note_duration ( tick_t l )
{
    if ( _link )
        _link->timestamp( timestamp() + l );
}