1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/* -*- 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 2006-2018 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 "HorizontalFrequencyScale.h"
#include "HorizontalScaleProvider.h"
#include "LayerGeometryProvider.h"
#include "base/ScaleTickIntervals.h"
#include <QPainter>
#include <cmath>
namespace sv {
int
HorizontalFrequencyScale::getHeight(LayerGeometryProvider *,
QPainter &paint)
{
return paint.fontMetrics().height() + 10;
}
void
HorizontalFrequencyScale::paintScale(LayerGeometryProvider *v,
const HorizontalScaleProvider *p,
QPainter &paint,
QRect r,
bool logarithmic)
{
int x0 = r.x(), y0 = r.y(), x1 = r.x() + r.width(), y1 = r.y() + r.height();
paint.drawLine(x0, y0, x1, y0);
double f0 = p->getFrequencyForX(v, x0 ? x0 : 1);
double f1 = p->getFrequencyForX(v, x1);
int n = 20;
auto ticks =
logarithmic ?
ScaleTickIntervals::logarithmic({ f0, f1, n }) :
ScaleTickIntervals::linear({ f0, f1, n });
n = int(ticks.size());
int marginx = -1;
for (int i = 0; i < n; ++i) {
double val = ticks[i].value;
QString label = QString::fromStdString(ticks[i].label);
int tw = paint.fontMetrics().horizontalAdvance(label);
int x = int(round(p->getXForFrequency(v, val)));
if (x < marginx) continue;
//!!! todo: pixel scaling (here & elsewhere in these classes)
paint.drawLine(x, y0, x, y1);
paint.drawText(x + 5, y0 + paint.fontMetrics().ascent() + 5, label);
marginx = x + tw + 10;
}
}
} // end namespace sv
|
