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6fa02541 JH |
1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include "sigview.h" | |
22 | ||
009e1503 | 23 | #include "sigsession.h" |
e3f65ace JH |
24 | #include "signal.h" |
25 | ||
e9c41f8c JH |
26 | #include "extdef.h" |
27 | ||
7cd5faf8 | 28 | #include <QMouseEvent> |
22016ad3 | 29 | #include <QTextStream> |
7cd5faf8 | 30 | |
e9c41f8c JH |
31 | #include <math.h> |
32 | ||
e3f65ace JH |
33 | #include <boost/foreach.hpp> |
34 | ||
35 | using namespace boost; | |
36 | using namespace std; | |
37 | ||
38 | const int SigView::SignalHeight = 50; | |
3e46726a | 39 | const int SigView::LabelMarginWidth = 70; |
e9c41f8c JH |
40 | const int SigView::RulerHeight = 30; |
41 | ||
42 | const int SigView::ScaleUnits[3] = {1, 2, 5}; | |
009e1503 | 43 | |
22016ad3 JH |
44 | const QString SigView::SIPrefixes[9] = |
45 | {"f", "p", "n", QChar(0x03BC), "m", "", "k", "M", "G"}; | |
46 | const int SigView::FirstSIPrefixPower = -15; | |
47 | ||
009e1503 JH |
48 | SigView::SigView(SigSession &session, QWidget *parent) : |
49 | QGLWidget(parent), | |
3b18c57d | 50 | _session(session), |
fb0d32cb | 51 | _scale(1e-6), |
3b18c57d | 52 | _offset(0) |
6fa02541 | 53 | { |
009e1503 JH |
54 | connect(&_session, SIGNAL(dataUpdated()), |
55 | this, SLOT(dataUpdated())); | |
56 | ||
d7002724 | 57 | setMouseTracking(true); |
3e46726a | 58 | setAutoFillBackground(false); |
d7002724 JH |
59 | } |
60 | ||
61 | void SigView::initializeGL() | |
62 | { | |
d7002724 JH |
63 | } |
64 | ||
65 | void SigView::resizeGL(int width, int height) | |
66 | { | |
3e46726a | 67 | setupViewport(width, height); |
d7002724 JH |
68 | } |
69 | ||
3e46726a | 70 | void SigView::paintEvent(QPaintEvent *event) |
d7002724 | 71 | { |
3e46726a | 72 | int offset; |
e3f65ace | 73 | |
e3f65ace JH |
74 | const vector< shared_ptr<Signal> > &sigs = |
75 | _session.get_signals(); | |
3e46726a JH |
76 | |
77 | // Prepare for OpenGL rendering | |
78 | makeCurrent(); | |
79 | glMatrixMode(GL_MODELVIEW); | |
80 | glPushMatrix(); | |
81 | ||
82 | setupViewport(width(), height()); | |
83 | ||
84 | qglClearColor(Qt::white); | |
85 | glClear(GL_COLOR_BUFFER_BIT); | |
86 | ||
87 | // Plot the signal | |
e9c41f8c | 88 | offset = RulerHeight; |
3e46726a JH |
89 | BOOST_FOREACH(const shared_ptr<Signal> s, sigs) |
90 | { | |
91 | assert(s); | |
92 | ||
93 | const QRect signal_rect(LabelMarginWidth, offset, | |
94 | width() - LabelMarginWidth, SignalHeight); | |
95 | ||
96 | s->paint(*this, signal_rect, _scale, _offset); | |
97 | ||
98 | offset += SignalHeight; | |
99 | } | |
100 | ||
101 | // Prepare for QPainter rendering | |
102 | glMatrixMode(GL_MODELVIEW); | |
103 | glPopMatrix(); | |
104 | ||
105 | QPainter painter(this); | |
106 | painter.setRenderHint(QPainter::Antialiasing); | |
107 | ||
e9c41f8c JH |
108 | // Paint the labels |
109 | offset = RulerHeight; | |
e3f65ace JH |
110 | BOOST_FOREACH(const shared_ptr<Signal> s, sigs) |
111 | { | |
112 | assert(s); | |
3e46726a JH |
113 | |
114 | const QRect label_rect(0, offset, | |
115 | LabelMarginWidth, SignalHeight); | |
116 | s->paint_label(painter, label_rect); | |
117 | ||
118 | offset += SignalHeight; | |
e3f65ace | 119 | } |
3e46726a | 120 | |
e9c41f8c JH |
121 | // Paint the ruler |
122 | paintRuler(painter); | |
123 | ||
3e46726a | 124 | painter.end(); |
6fa02541 | 125 | } |
009e1503 JH |
126 | |
127 | void SigView::dataUpdated() | |
128 | { | |
e3f65ace | 129 | update(); |
009e1503 JH |
130 | } |
131 | ||
7cd5faf8 JH |
132 | void SigView::mouseMoveEvent(QMouseEvent *event) |
133 | { | |
134 | assert(event); | |
135 | } | |
136 | ||
137 | void SigView::mousePressEvent(QMouseEvent *event) | |
138 | { | |
139 | assert(event); | |
140 | } | |
141 | ||
142 | void SigView::mouseReleaseEvent(QMouseEvent *event) | |
143 | { | |
144 | assert(event); | |
145 | ||
fb0d32cb JH |
146 | const double cursor_offset = _offset + _scale * (double)event->x(); |
147 | ||
7cd5faf8 JH |
148 | switch(event->button()) |
149 | { | |
150 | case Qt::LeftButton: | |
fb0d32cb | 151 | _scale *= 2.0 / 3.0; |
7cd5faf8 JH |
152 | break; |
153 | ||
154 | case Qt::RightButton: | |
fb0d32cb | 155 | _scale *= 3.0 / 2.0; |
7cd5faf8 JH |
156 | break; |
157 | } | |
158 | ||
fb0d32cb JH |
159 | _offset = cursor_offset - _scale * (double)event->x(); |
160 | ||
3e46726a | 161 | update(); |
7cd5faf8 JH |
162 | } |
163 | ||
3e46726a JH |
164 | void SigView::setupViewport(int width, int height) |
165 | { | |
166 | glViewport(0, 0, (GLint)width, (GLint)height); | |
167 | glMatrixMode(GL_PROJECTION); | |
168 | glLoadIdentity(); | |
169 | glOrtho(0, width, height, 0, -1, 1); | |
170 | glMatrixMode(GL_MODELVIEW); | |
171 | } | |
e9c41f8c JH |
172 | |
173 | void SigView::paintRuler(QPainter &p) | |
174 | { | |
22016ad3 | 175 | const double MinSpacing = 80; |
e9c41f8c | 176 | |
e9c41f8c JH |
177 | const double min_period = _scale * MinSpacing; |
178 | ||
22016ad3 JH |
179 | const int order = (int)floorf(log10f(min_period)); |
180 | const double order_decimal = pow(10, order); | |
181 | ||
182 | int unit = 0; | |
183 | double tick_period = 0.0f; | |
184 | ||
185 | do | |
e9c41f8c | 186 | { |
22016ad3 JH |
187 | tick_period = order_decimal * ScaleUnits[unit++]; |
188 | } while(tick_period < min_period && unit < countof(ScaleUnits)); | |
e9c41f8c | 189 | |
22016ad3 JH |
190 | const int prefix = (order - FirstSIPrefixPower) / 3; |
191 | assert(prefix >= 0); | |
192 | assert(prefix < countof(SIPrefixes)); | |
e9c41f8c | 193 | |
22016ad3 JH |
194 | const int text_height = p.boundingRect(0, 0, INT_MAX, INT_MAX, |
195 | Qt::AlignLeft | Qt::AlignTop, "8").height(); | |
e9c41f8c | 196 | |
22016ad3 | 197 | // Draw the tick marks |
e9c41f8c JH |
198 | p.setPen(Qt::black); |
199 | ||
22016ad3 JH |
200 | double t = ceil(_offset / tick_period) * tick_period; |
201 | double x = 0.0; | |
202 | while((x = (t - _offset) / _scale + LabelMarginWidth) < width()) | |
e9c41f8c | 203 | { |
22016ad3 JH |
204 | QString s; |
205 | QTextStream ts(&s); | |
206 | ts << (t / order_decimal) << SIPrefixes[prefix] << "s"; | |
207 | p.drawText(x, 0, 0, text_height, Qt::AlignCenter | Qt::AlignTop | | |
208 | Qt::TextDontClip, s); | |
209 | p.drawLine(x, text_height, x, RulerHeight); | |
210 | t += tick_period; | |
e9c41f8c JH |
211 | } |
212 | } |