1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
2
3 /*
4 Sonic Visualiser
5 An audio file viewer and annotation editor.
6 Centre for Digital Music, Queen Mary, University of London.
7 This file copyright 2006-2018 Chris Cannam and QMUL.
8
9 This program is free software; you can redistribute it and/or
10 modify it under the terms of the GNU General Public License as
11 published by the Free Software Foundation; either version 2 of the
12 License, or (at your option) any later version. See the file
13 COPYING included with this distribution for more information.
14 */
15
16 #include "LinearNumericalScale.h"
17 #include "VerticalScaleLayer.h"
18 #include "LayerGeometryProvider.h"
19
20 #include <QPainter>
21
22 #include <cmath>
23
24 #include "base/ScaleTickIntervals.h"
25
26 int
getWidth(LayerGeometryProvider *,QPainter & paint)27 LinearNumericalScale::getWidth(LayerGeometryProvider *,
28 QPainter &paint)
29 {
30 // Qt 5.13 deprecates QFontMetrics::width(), but its suggested
31 // replacement (horizontalAdvance) was only added in Qt 5.11
32 // which is too new for us
33 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
34
35 return paint.fontMetrics().width("-000.00") + 10;
36 }
37
38 void
paintVertical(LayerGeometryProvider * v,const VerticalScaleLayer * layer,QPainter & paint,int x0,double minf,double maxf)39 LinearNumericalScale::paintVertical(LayerGeometryProvider *v,
40 const VerticalScaleLayer *layer,
41 QPainter &paint,
42 int x0,
43 double minf,
44 double maxf)
45 {
46 int n = 10;
47 auto ticks = ScaleTickIntervals::linear({ minf, maxf, n });
48 n = int(ticks.size());
49
50 int w = getWidth(v, paint) + x0;
51
52 int prevy = -1;
53
54 for (int i = 0; i < n; ++i) {
55
56 int y, ty;
57 bool drawText = true;
58
59 if (i == n-1 &&
60 v->getPaintHeight() < paint.fontMetrics().height() * (n*2)) {
61 if (layer->getScaleUnits() != "") drawText = false;
62 }
63
64 double val = ticks[i].value;
65 QString label = QString::fromStdString(ticks[i].label);
66
67 y = layer->getYForValue(v, val);
68
69 ty = y - paint.fontMetrics().height() + paint.fontMetrics().ascent() + 2;
70
71 if (prevy >= 0 && (prevy - y) < paint.fontMetrics().height()) {
72 continue;
73 }
74
75 paint.drawLine(w - 5, y, w, y);
76
77 if (drawText) {
78 paint.drawText(w - paint.fontMetrics().width(label) - 6,
79 ty, label);
80 }
81
82 prevy = y;
83 }
84 }
85