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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 | ||
cdf7bea7 JH |
21 | #include "view.h" |
22 | #include "viewport.h" | |
6fa02541 | 23 | |
cdf7bea7 JH |
24 | #include "../../sigsession.h" |
25 | #include "../../signal.h" | |
e3f65ace | 26 | |
cdf7bea7 | 27 | #include "../../extdef.h" |
e9c41f8c | 28 | |
7cd5faf8 | 29 | #include <QMouseEvent> |
22016ad3 | 30 | #include <QTextStream> |
7cd5faf8 | 31 | |
e9c41f8c JH |
32 | #include <math.h> |
33 | ||
e3f65ace JH |
34 | #include <boost/foreach.hpp> |
35 | ||
36 | using namespace boost; | |
37 | using namespace std; | |
38 | ||
cdf7bea7 JH |
39 | namespace pv { |
40 | namespace view { | |
e9c41f8c | 41 | |
cdf7bea7 | 42 | const int Viewport::SignalHeight = 50; |
009e1503 | 43 | |
cdf7bea7 JH |
44 | const int Viewport::MinorTickSubdivision = 4; |
45 | const int Viewport::ScaleUnits[3] = {1, 2, 5}; | |
46 | ||
47 | const QString Viewport::SIPrefixes[9] = | |
22016ad3 | 48 | {"f", "p", "n", QChar(0x03BC), "m", "", "k", "M", "G"}; |
cdf7bea7 | 49 | const int Viewport::FirstSIPrefixPower = -15; |
22016ad3 | 50 | |
cdf7bea7 | 51 | Viewport::Viewport(View &parent) : |
adb4b10c JH |
52 | QGLWidget(&parent), |
53 | _view(parent) | |
6fa02541 | 54 | { |
d7002724 | 55 | setMouseTracking(true); |
3e46726a | 56 | setAutoFillBackground(false); |
d7002724 JH |
57 | } |
58 | ||
cdf7bea7 | 59 | int Viewport::get_total_height() const |
a429590b | 60 | { |
adb4b10c JH |
61 | int height = 0; |
62 | BOOST_FOREACH(const shared_ptr<Signal> s, | |
1d19ef83 | 63 | _view.session().get_signals()) { |
adb4b10c JH |
64 | assert(s); |
65 | height += SignalHeight; | |
66 | } | |
67 | ||
68 | return height; | |
a429590b JH |
69 | } |
70 | ||
cdf7bea7 | 71 | void Viewport::initializeGL() |
d7002724 | 72 | { |
d7002724 JH |
73 | } |
74 | ||
cdf7bea7 | 75 | void Viewport::resizeGL(int width, int height) |
d7002724 | 76 | { |
04abfae9 | 77 | setup_viewport(width, height); |
d7002724 JH |
78 | } |
79 | ||
cdf7bea7 | 80 | void Viewport::paintEvent(QPaintEvent *event) |
d7002724 | 81 | { |
3e46726a | 82 | int offset; |
e3f65ace | 83 | |
e3f65ace | 84 | const vector< shared_ptr<Signal> > &sigs = |
1d19ef83 | 85 | _view.session().get_signals(); |
3e46726a JH |
86 | |
87 | // Prepare for OpenGL rendering | |
88 | makeCurrent(); | |
89 | glMatrixMode(GL_MODELVIEW); | |
90 | glPushMatrix(); | |
91 | ||
04abfae9 | 92 | setup_viewport(width(), height()); |
3e46726a JH |
93 | |
94 | qglClearColor(Qt::white); | |
95 | glClear(GL_COLOR_BUFFER_BIT); | |
96 | ||
97 | // Plot the signal | |
aeed8b41 | 98 | glEnable(GL_SCISSOR_TEST); |
cdf7bea7 JH |
99 | glScissor(View::LabelMarginWidth, 0, width(), height()); |
100 | offset = View::RulerHeight - _view.v_offset(); | |
3e46726a JH |
101 | BOOST_FOREACH(const shared_ptr<Signal> s, sigs) |
102 | { | |
103 | assert(s); | |
104 | ||
cdf7bea7 JH |
105 | const QRect signal_rect(View::LabelMarginWidth, offset, |
106 | width() - View::LabelMarginWidth, SignalHeight); | |
3e46726a | 107 | |
adb4b10c | 108 | s->paint(*this, signal_rect, _view.scale(), _view.offset()); |
3e46726a JH |
109 | |
110 | offset += SignalHeight; | |
111 | } | |
112 | ||
aeed8b41 JH |
113 | glDisable(GL_SCISSOR_TEST); |
114 | ||
3e46726a JH |
115 | // Prepare for QPainter rendering |
116 | glMatrixMode(GL_MODELVIEW); | |
117 | glPopMatrix(); | |
118 | ||
119 | QPainter painter(this); | |
120 | painter.setRenderHint(QPainter::Antialiasing); | |
121 | ||
e9c41f8c | 122 | // Paint the labels |
cdf7bea7 | 123 | offset = View::RulerHeight - _view.v_offset(); |
e3f65ace JH |
124 | BOOST_FOREACH(const shared_ptr<Signal> s, sigs) |
125 | { | |
126 | assert(s); | |
3e46726a JH |
127 | |
128 | const QRect label_rect(0, offset, | |
cdf7bea7 | 129 | View::LabelMarginWidth, SignalHeight); |
3e46726a JH |
130 | s->paint_label(painter, label_rect); |
131 | ||
132 | offset += SignalHeight; | |
e3f65ace | 133 | } |
3e46726a | 134 | |
e9c41f8c | 135 | // Paint the ruler |
04abfae9 | 136 | paint_ruler(painter); |
e9c41f8c | 137 | |
3e46726a | 138 | painter.end(); |
6fa02541 | 139 | } |
009e1503 | 140 | |
cdf7bea7 | 141 | void Viewport::mousePressEvent(QMouseEvent *event) |
7cd5faf8 JH |
142 | { |
143 | assert(event); | |
1dd95c70 JH |
144 | |
145 | _mouse_down_point = event->pos(); | |
adb4b10c | 146 | _mouse_down_offset = _view.offset(); |
7cd5faf8 JH |
147 | } |
148 | ||
cdf7bea7 | 149 | void Viewport::mouseMoveEvent(QMouseEvent *event) |
7cd5faf8 JH |
150 | { |
151 | assert(event); | |
1dd95c70 JH |
152 | |
153 | if(event->buttons() & Qt::LeftButton) | |
154 | { | |
adb4b10c JH |
155 | _view.set_scale_offset(_view.scale(), |
156 | _mouse_down_offset + | |
157 | (_mouse_down_point - event->pos()).x() * | |
158 | _view.scale()); | |
1dd95c70 | 159 | } |
7cd5faf8 JH |
160 | } |
161 | ||
cdf7bea7 | 162 | void Viewport::mouseReleaseEvent(QMouseEvent *event) |
7cd5faf8 JH |
163 | { |
164 | assert(event); | |
1dd95c70 | 165 | } |
7cd5faf8 | 166 | |
cdf7bea7 | 167 | void Viewport::wheelEvent(QWheelEvent *event) |
1dd95c70 JH |
168 | { |
169 | assert(event); | |
adb4b10c | 170 | _view.zoom(event->delta() / 120, event->x() - |
cdf7bea7 | 171 | View::LabelMarginWidth); |
7cd5faf8 JH |
172 | } |
173 | ||
cdf7bea7 | 174 | void Viewport::setup_viewport(int width, int height) |
3e46726a JH |
175 | { |
176 | glViewport(0, 0, (GLint)width, (GLint)height); | |
177 | glMatrixMode(GL_PROJECTION); | |
178 | glLoadIdentity(); | |
179 | glOrtho(0, width, height, 0, -1, 1); | |
180 | glMatrixMode(GL_MODELVIEW); | |
181 | } | |
e9c41f8c | 182 | |
cdf7bea7 | 183 | void Viewport::paint_ruler(QPainter &p) |
e9c41f8c | 184 | { |
22016ad3 | 185 | const double MinSpacing = 80; |
e9c41f8c | 186 | |
adb4b10c | 187 | const double min_period = _view.scale() * MinSpacing; |
e9c41f8c | 188 | |
22016ad3 JH |
189 | const int order = (int)floorf(log10f(min_period)); |
190 | const double order_decimal = pow(10, order); | |
191 | ||
192 | int unit = 0; | |
193 | double tick_period = 0.0f; | |
194 | ||
195 | do | |
e9c41f8c | 196 | { |
22016ad3 JH |
197 | tick_period = order_decimal * ScaleUnits[unit++]; |
198 | } while(tick_period < min_period && unit < countof(ScaleUnits)); | |
e9c41f8c | 199 | |
22016ad3 JH |
200 | const int prefix = (order - FirstSIPrefixPower) / 3; |
201 | assert(prefix >= 0); | |
202 | assert(prefix < countof(SIPrefixes)); | |
e9c41f8c | 203 | |
22016ad3 JH |
204 | const int text_height = p.boundingRect(0, 0, INT_MAX, INT_MAX, |
205 | Qt::AlignLeft | Qt::AlignTop, "8").height(); | |
e9c41f8c | 206 | |
22016ad3 | 207 | // Draw the tick marks |
e9c41f8c JH |
208 | p.setPen(Qt::black); |
209 | ||
438440ea | 210 | const double minor_tick_period = tick_period / MinorTickSubdivision; |
adb4b10c JH |
211 | const double first_major_division = |
212 | floor(_view.offset() / tick_period); | |
213 | const double first_minor_division = | |
214 | ceil(_view.offset() / minor_tick_period); | |
438440ea JH |
215 | const double t0 = first_major_division * tick_period; |
216 | ||
217 | int division = (int)round(first_minor_division - | |
218 | first_major_division * MinorTickSubdivision); | |
219 | while(1) | |
e9c41f8c | 220 | { |
438440ea | 221 | const double t = t0 + division * minor_tick_period; |
adb4b10c | 222 | const double x = (t - _view.offset()) / _view.scale() + |
cdf7bea7 | 223 | View::LabelMarginWidth; |
438440ea JH |
224 | |
225 | if(x >= width()) | |
226 | break; | |
227 | ||
228 | if(division % MinorTickSubdivision == 0) | |
229 | { | |
230 | // Draw a major tick | |
231 | QString s; | |
232 | QTextStream ts(&s); | |
233 | ts << (t / order_decimal) << SIPrefixes[prefix] << "s"; | |
234 | p.drawText(x, 0, 0, text_height, Qt::AlignCenter | Qt::AlignTop | | |
235 | Qt::TextDontClip, s); | |
cdf7bea7 | 236 | p.drawLine(x, text_height, x, View::RulerHeight); |
438440ea JH |
237 | } |
238 | else | |
239 | { | |
240 | // Draw a minor tick | |
adb4b10c | 241 | p.drawLine(x, |
cdf7bea7 JH |
242 | (text_height + View::RulerHeight) / 2, x, |
243 | View::RulerHeight); | |
438440ea JH |
244 | } |
245 | ||
246 | division++; | |
e9c41f8c JH |
247 | } |
248 | } | |
cdf7bea7 JH |
249 | |
250 | } // namespace view | |
251 | } // namespace pv |