view layer/PianoScale.cpp @ 1135:628cd329c241 spectrogram-minor-refactor

Use a count of bins rather than min and max bins (because the name maxbin tells us nothing about whether the range is inclusive or not)
author Chris Cannam
date Wed, 03 Aug 2016 14:20:27 +0100
parents 5144d7185fb5
children 4d0ca1ab4cd0
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/* -*- 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 2006-2013 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.
*/

#include "PianoScale.h"

#include <QPainter>

#include <cmath>

#include "base/Pitch.h"

#include "LayerGeometryProvider.h"

void
PianoScale::paintPianoVertical(LayerGeometryProvider *v,
			       QPainter &paint,
			       QRect r,
			       double minf,
			       double maxf)
{
    int x0 = r.x(), y0 = r.y(), x1 = r.x() + r.width(), y1 = r.y() + r.height();

    paint.drawLine(x0, y0, x0, y1);

    int py = y1, ppy = y1;
    paint.setBrush(paint.pen().color());

    for (int i = 0; i < 128; ++i) {

	double f = Pitch::getFrequencyForPitch(i);
	int y = int(lrint(v->getYForFrequency(f, minf, maxf, true)));

	if (y < y0 - 2) break;
	if (y > y1 + 2) {
	    continue;
	}
	
	int n = (i % 12);
	
	if (n == 1) {
	    // C# -- fill the C from here
	    QColor col = Qt::gray;
	    if (i == 61) { // filling middle C
		col = Qt::blue;
		col = col.light(150);
	    }
	    if (ppy - y > 2) {
		paint.fillRect(x0 + 1,
			       y,
			       x1 - x0,
			       (py + ppy) / 2 - y,
			       col);
	    }
	}
	
	if (n == 1 || n == 3 || n == 6 || n == 8 || n == 10) {
	    // black notes
	    paint.drawLine(x0 + 1, y, x1, y);
	    int rh = ((py - y) / 4) * 2;
	    if (rh < 2) rh = 2;
	    paint.drawRect(x0 + 1, y - (py-y)/4, (x1 - x0) / 2, rh);
	} else if (n == 0 || n == 5) {
	    // C, F
	    if (py < y1) {
		paint.drawLine(x0 + 1, (y + py) / 2, x1, (y + py) / 2);
	    }
	}
	
	ppy = py;
	py = y;
    }
}