view layer/PaintAssistant.h @ 283:86a112b5b319

* Make it possible to "measure" a feature on the spectrogram by double-
  clicking in measure mode
* Make shift-click-drag (for zoom to region) work in measure mode as well
  as navigate mode.  It would be nice to be able to shift-doubleclick to
  zoom on a feature directly using a combination of these last two features,
  but that isn't possible yet.
* Make Del delete the measurement under the mouse pointer.

/* -*- 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