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 2006-2013 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 "LinearColourScale.h"
17 #include "ColourScaleLayer.h"
18
19 #include <QPainter>
20
21 #include <cmath>
22
23 #include "LayerGeometryProvider.h"
24
25 int
getWidth(LayerGeometryProvider *,QPainter & paint)26 LinearColourScale::getWidth(LayerGeometryProvider *,
27 QPainter &paint)
28 {
29 // Qt 5.13 deprecates QFontMetrics::width(), but its suggested
30 // replacement (horizontalAdvance) was only added in Qt 5.11
31 // which is too new for us
32 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
33
34 return paint.fontMetrics().width("-000.00") + 15;
35 }
36
37 void
paintVertical(LayerGeometryProvider * v,const ColourScaleLayer * layer,QPainter & paint,int,double min,double max)38 LinearColourScale::paintVertical(LayerGeometryProvider *v,
39 const ColourScaleLayer *layer,
40 QPainter &paint,
41 int /* x0 */,
42 double min,
43 double max)
44 {
45 int h = v->getPaintHeight();
46
47 int n = 10;
48
49 double val = min;
50 double inc = (max - val) / n;
51
52 const int buflen = 40;
53 char buffer[buflen];
54
55 int boxx = 5, boxy = 5;
56 if (layer->getScaleUnits() != "") {
57 boxy += paint.fontMetrics().height();
58 }
59 int boxw = 10, boxh = h - boxy - 5;
60
61 int tx = 5 + boxx + boxw;
62 paint.drawRect(boxx, boxy, boxw, boxh);
63
64 paint.save();
65 for (int y = 0; y < boxh; ++y) {
66 double val = ((boxh - y) * (max - min)) / boxh + min;
67 paint.setPen(layer->getColourForValue(v, val));
68 paint.drawLine(boxx + 1, y + boxy + 1, boxx + boxw, y + boxy + 1);
69 }
70 paint.restore();
71
72 // double round = 1.f;
73 int dp = 0;
74 if (inc > 0) {
75 int prec = int(trunc(log10(inc)));
76 prec -= 1;
77 if (prec < 0) dp = -prec;
78 // round = powf(10.f, prec);
79 //#ifdef DEBUG_TIME_VALUE_LAYER
80 // cerr << "inc = " << inc << ", round = " << round << ", dp = " << dp << endl;
81 //#endif
82 }
83
84 for (int i = 0; i < n; ++i) {
85
86 int y, ty;
87
88 y = boxy + int(boxh - ((val - min) * boxh) / (max - min));
89
90 ty = y - paint.fontMetrics().height() +
91 paint.fontMetrics().ascent() + 2;
92
93 snprintf(buffer, buflen, "%.*f", dp, val);
94 QString label = QString(buffer);
95
96 paint.drawLine(boxx + boxw - boxw/3, y, boxx + boxw, y);
97 paint.drawText(tx, ty, label);
98
99 val += inc;
100 }
101 }
102