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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 | ||
7ae27594 JH |
38 | const double SigView::MaxScale = 1e9; |
39 | const double SigView::MinScale = 1e-15; | |
40 | ||
e3f65ace | 41 | const int SigView::SignalHeight = 50; |
3e46726a | 42 | const int SigView::LabelMarginWidth = 70; |
e9c41f8c JH |
43 | const int SigView::RulerHeight = 30; |
44 | ||
438440ea | 45 | const int SigView::MinorTickSubdivision = 4; |
e9c41f8c | 46 | const int SigView::ScaleUnits[3] = {1, 2, 5}; |
009e1503 | 47 | |
22016ad3 JH |
48 | const QString SigView::SIPrefixes[9] = |
49 | {"f", "p", "n", QChar(0x03BC), "m", "", "k", "M", "G"}; | |
50 | const int SigView::FirstSIPrefixPower = -15; | |
51 | ||
009e1503 JH |
52 | SigView::SigView(SigSession &session, QWidget *parent) : |
53 | QGLWidget(parent), | |
3b18c57d | 54 | _session(session), |
fb0d32cb | 55 | _scale(1e-6), |
3b18c57d | 56 | _offset(0) |
6fa02541 | 57 | { |
04abfae9 JH |
58 | connect(&_session, SIGNAL(data_updated()), |
59 | this, SLOT(data_updated())); | |
009e1503 | 60 | |
d7002724 | 61 | setMouseTracking(true); |
3e46726a | 62 | setAutoFillBackground(false); |
d7002724 JH |
63 | } |
64 | ||
a429590b JH |
65 | void SigView::zoom(double steps) |
66 | { | |
67 | zoom(steps, (width() - LabelMarginWidth) / 2); | |
68 | } | |
69 | ||
d7002724 JH |
70 | void SigView::initializeGL() |
71 | { | |
d7002724 JH |
72 | } |
73 | ||
74 | void SigView::resizeGL(int width, int height) | |
75 | { | |
04abfae9 | 76 | setup_viewport(width, height); |
d7002724 JH |
77 | } |
78 | ||
3e46726a | 79 | void SigView::paintEvent(QPaintEvent *event) |
d7002724 | 80 | { |
3e46726a | 81 | int offset; |
e3f65ace | 82 | |
e3f65ace JH |
83 | const vector< shared_ptr<Signal> > &sigs = |
84 | _session.get_signals(); | |
3e46726a JH |
85 | |
86 | // Prepare for OpenGL rendering | |
87 | makeCurrent(); | |
88 | glMatrixMode(GL_MODELVIEW); | |
89 | glPushMatrix(); | |
90 | ||
04abfae9 | 91 | setup_viewport(width(), height()); |
3e46726a JH |
92 | |
93 | qglClearColor(Qt::white); | |
94 | glClear(GL_COLOR_BUFFER_BIT); | |
95 | ||
96 | // Plot the signal | |
aeed8b41 JH |
97 | glEnable(GL_SCISSOR_TEST); |
98 | glScissor(LabelMarginWidth, 0, width(), height()); | |
e9c41f8c | 99 | offset = RulerHeight; |
3e46726a JH |
100 | BOOST_FOREACH(const shared_ptr<Signal> s, sigs) |
101 | { | |
102 | assert(s); | |
103 | ||
104 | const QRect signal_rect(LabelMarginWidth, offset, | |
105 | width() - LabelMarginWidth, SignalHeight); | |
106 | ||
107 | s->paint(*this, signal_rect, _scale, _offset); | |
108 | ||
109 | offset += SignalHeight; | |
110 | } | |
111 | ||
aeed8b41 JH |
112 | glDisable(GL_SCISSOR_TEST); |
113 | ||
3e46726a JH |
114 | // Prepare for QPainter rendering |
115 | glMatrixMode(GL_MODELVIEW); | |
116 | glPopMatrix(); | |
117 | ||
118 | QPainter painter(this); | |
119 | painter.setRenderHint(QPainter::Antialiasing); | |
120 | ||
e9c41f8c JH |
121 | // Paint the labels |
122 | offset = RulerHeight; | |
e3f65ace JH |
123 | BOOST_FOREACH(const shared_ptr<Signal> s, sigs) |
124 | { | |
125 | assert(s); | |
3e46726a JH |
126 | |
127 | const QRect label_rect(0, offset, | |
128 | LabelMarginWidth, SignalHeight); | |
129 | s->paint_label(painter, label_rect); | |
130 | ||
131 | offset += SignalHeight; | |
e3f65ace | 132 | } |
3e46726a | 133 | |
e9c41f8c | 134 | // Paint the ruler |
04abfae9 | 135 | paint_ruler(painter); |
e9c41f8c | 136 | |
3e46726a | 137 | painter.end(); |
6fa02541 | 138 | } |
009e1503 | 139 | |
04abfae9 | 140 | void SigView::data_updated() |
009e1503 | 141 | { |
e3f65ace | 142 | update(); |
009e1503 JH |
143 | } |
144 | ||
1dd95c70 | 145 | void SigView::mousePressEvent(QMouseEvent *event) |
7cd5faf8 JH |
146 | { |
147 | assert(event); | |
1dd95c70 JH |
148 | |
149 | _mouse_down_point = event->pos(); | |
150 | _mouse_down_offset = _offset; | |
7cd5faf8 JH |
151 | } |
152 | ||
1dd95c70 | 153 | void SigView::mouseMoveEvent(QMouseEvent *event) |
7cd5faf8 JH |
154 | { |
155 | assert(event); | |
1dd95c70 JH |
156 | |
157 | if(event->buttons() & Qt::LeftButton) | |
158 | { | |
159 | _offset = _mouse_down_offset + (_mouse_down_point - event->pos()).x() * _scale; | |
160 | update(); | |
161 | } | |
7cd5faf8 JH |
162 | } |
163 | ||
164 | void SigView::mouseReleaseEvent(QMouseEvent *event) | |
165 | { | |
166 | assert(event); | |
1dd95c70 | 167 | } |
7cd5faf8 | 168 | |
1dd95c70 JH |
169 | void SigView::wheelEvent(QWheelEvent *event) |
170 | { | |
171 | assert(event); | |
a429590b | 172 | zoom(event->delta() / 120, event->x() - LabelMarginWidth); |
7cd5faf8 JH |
173 | } |
174 | ||
04abfae9 | 175 | void SigView::setup_viewport(int width, int height) |
3e46726a JH |
176 | { |
177 | glViewport(0, 0, (GLint)width, (GLint)height); | |
178 | glMatrixMode(GL_PROJECTION); | |
179 | glLoadIdentity(); | |
180 | glOrtho(0, width, height, 0, -1, 1); | |
181 | glMatrixMode(GL_MODELVIEW); | |
182 | } | |
e9c41f8c | 183 | |
04abfae9 | 184 | void SigView::paint_ruler(QPainter &p) |
e9c41f8c | 185 | { |
22016ad3 | 186 | const double MinSpacing = 80; |
e9c41f8c | 187 | |
e9c41f8c JH |
188 | const double min_period = _scale * MinSpacing; |
189 | ||
22016ad3 JH |
190 | const int order = (int)floorf(log10f(min_period)); |
191 | const double order_decimal = pow(10, order); | |
192 | ||
193 | int unit = 0; | |
194 | double tick_period = 0.0f; | |
195 | ||
196 | do | |
e9c41f8c | 197 | { |
22016ad3 JH |
198 | tick_period = order_decimal * ScaleUnits[unit++]; |
199 | } while(tick_period < min_period && unit < countof(ScaleUnits)); | |
e9c41f8c | 200 | |
22016ad3 JH |
201 | const int prefix = (order - FirstSIPrefixPower) / 3; |
202 | assert(prefix >= 0); | |
203 | assert(prefix < countof(SIPrefixes)); | |
e9c41f8c | 204 | |
22016ad3 JH |
205 | const int text_height = p.boundingRect(0, 0, INT_MAX, INT_MAX, |
206 | Qt::AlignLeft | Qt::AlignTop, "8").height(); | |
e9c41f8c | 207 | |
22016ad3 | 208 | // Draw the tick marks |
e9c41f8c JH |
209 | p.setPen(Qt::black); |
210 | ||
438440ea JH |
211 | const double minor_tick_period = tick_period / MinorTickSubdivision; |
212 | const double first_major_division = floor(_offset / tick_period); | |
213 | const double first_minor_division = ceil(_offset / minor_tick_period); | |
214 | const double t0 = first_major_division * tick_period; | |
215 | ||
216 | int division = (int)round(first_minor_division - | |
217 | first_major_division * MinorTickSubdivision); | |
218 | while(1) | |
e9c41f8c | 219 | { |
438440ea JH |
220 | const double t = t0 + division * minor_tick_period; |
221 | const double x = (t - _offset) / _scale + LabelMarginWidth; | |
222 | ||
223 | if(x >= width()) | |
224 | break; | |
225 | ||
226 | if(division % MinorTickSubdivision == 0) | |
227 | { | |
228 | // Draw a major tick | |
229 | QString s; | |
230 | QTextStream ts(&s); | |
231 | ts << (t / order_decimal) << SIPrefixes[prefix] << "s"; | |
232 | p.drawText(x, 0, 0, text_height, Qt::AlignCenter | Qt::AlignTop | | |
233 | Qt::TextDontClip, s); | |
234 | p.drawLine(x, text_height, x, RulerHeight); | |
235 | } | |
236 | else | |
237 | { | |
238 | // Draw a minor tick | |
239 | p.drawLine(x, (text_height + RulerHeight) / 2, x, RulerHeight); | |
240 | } | |
241 | ||
242 | division++; | |
e9c41f8c JH |
243 | } |
244 | } | |
a429590b JH |
245 | |
246 | void SigView::zoom(double steps, int offset) | |
247 | { | |
248 | const double cursor_offset = _offset + _scale * offset; | |
249 | _scale *= pow(3.0/2.0, -steps); | |
250 | _scale = max(min(_scale, MaxScale), MinScale); | |
251 | _offset = cursor_offset - _scale * offset; | |
252 | update(); | |
253 | } |