view data/model/TabularModel.h @ 1394:9ef1cc26024c

Add Range01 normalisation method to ColumnOp. This is the normalisation that is actually used in the Colour 3D Plot layer historically when column normalisation is enabled (not Max1 after all).

/* -*- 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 2008 QMUL.
    
    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 _TABULAR_MODEL_H_
#define _TABULAR_MODEL_H_

#include <QVariant>
#include <QString>

class Command;

/**
 * TabularModel is an abstract base class for models that support
 * direct access to data in a tabular form.  A model that implements
 * TabularModel may be displayed and, perhaps, edited in a data
 * spreadsheet window.
 *
 * This is very like a cut-down QAbstractItemModel.  It assumes a
 * relationship between row number and frame time.
 */

class TabularModel
{
public:
    virtual ~TabularModel() { }

    virtual int getRowCount() const = 0;
    virtual int getColumnCount() const = 0;

    virtual QString getHeading(int column) const = 0;

    enum { SortRole = Qt::UserRole };
    enum SortType { SortNumeric, SortAlphabetical };

    virtual QVariant getData(int row, int column, int role) const = 0;
    virtual bool isColumnTimeValue(int col) const = 0;
    virtual SortType getSortType(int col) const = 0;

    virtual sv_frame_t getFrameForRow(int row) const = 0;
    virtual int getRowForFrame(sv_frame_t frame) const = 0;

    virtual bool isEditable() const { return false; }
    virtual Command *getSetDataCommand(int /* row */, int /* column */, const QVariant &, int /* role */) { return 0; }
    virtual Command *getInsertRowCommand(int /* beforeRow */) { return 0; }
    virtual Command *getRemoveRowCommand(int /* row */) { return 0; }
};

#endif