view layer/PaintAssistant.h @ 349:369a197737c7

* Various fixes to object lifetime management, particularly in the spectrum
  layer and for notification of main model deletion.
  The main purpose of this is to improve the behaviour of the spectrum, but I
  think it may also help with #1840922 Various crashes in Layer Summary window.

/* -*- 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 2006-2007 Chris Cannam and 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 _PAINT_ASSISTANT_H_
#define _PAINT_ASSISTANT_H_

#include <QRect>
#include <vector>

class QPainter;

class PaintAssistant
{
public:
    enum Scale { LinearScale, MeterScale, dBScale };

    static void paintVerticalLevelScale(QPainter &p, QRect rect,
                                        float minVal, float maxVal,
                                        Scale scale, int &multRtn,
                                        std::vector<int> *markCoordRtns = 0);

    static int getYForValue(Scale scale, float value,
                            float minVal, float maxVal,
                            int minY, int height);
};

#endif