view base/Playable.h @ 1374:8db84bd61eaa

Some work to make spectrum layers (and slice layers generally) zoomable in the frequency axis. Also fixes a number of view id mixups in SliceLayer which broke offset calculations for the x axis scale.

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006 Chris Cannam.
    
    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.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef _PLAYABLE_H_
#define _PLAYABLE_H_

#include <QString>

class Playable
{
public:
    virtual ~Playable() { }
    
    virtual bool canPlay() const { return false; }
    virtual QString getDefaultPlayClipId() const { return ""; }
    virtual bool getDefaultPlayAudible() const { return true; }
};

#endif