matrixvlayout.h

LINUX下的混音软件

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

/*
    Rosegarden
    A MIDI and audio sequencer and musical notation editor.

    This program is Copyright 2000-2007
        Guillaume Laurent   <[e-mail]>,
        Chris Cannam        <[e-mail]>,
        Richard Bown        <[e-mail]>

    The moral rights of Guillaume Laurent, Chris Cannam, and Richard
    Bown to claim authorship of this work have been asserted.

    Other copyrights also apply to some parts of this work.  Please
    see the AUTHORS file and individual file headers for details.

    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 _RG_MATRIXVLAYOUT_H_
#define _RG_MATRIXVLAYOUT_H_

#include "base/LayoutEngine.h"
#include "base/Event.h"




namespace Rosegarden
{

class Staff;


class MatrixVLayout : public VerticalLayoutEngine
{
public:
    MatrixVLayout();

    virtual ~MatrixVLayout();

    /**
     * Resets internal data stores for all staffs
     */
    virtual void reset();

    /**
     * Resets internal data stores for a specific staff
     */
    virtual void resetStaff(Staff &staff,
                            timeT = 0,
                            timeT = 0);

    /**
     * Precomputes layout data for a single staff, updating any
     * internal data stores associated with that staff and updating
     * any layout-related properties in the events on the staff's
     * segment.
     */
    virtual void scanStaff(Staff &staff,
                           timeT = 0,
                           timeT = 0);

    /**
     * Computes any layout data that may depend on the results of
     * scanning more than one staff.  This may mean doing most of
     * the layout (likely for horizontal layout) or nothing at all
     * (likely for vertical layout).
     */
    virtual void finishLayout(timeT = 0,
                              timeT = 0);

    static const int minMIDIPitch;
    static const int maxMIDIPitch;

protected:
    //--------------- Data members ---------------------------------


};


}

#endif