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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 JH |
42 | const int Viewport::MinorTickSubdivision = 4; |
43 | const int Viewport::ScaleUnits[3] = {1, 2, 5}; | |
44 | ||
45 | const QString Viewport::SIPrefixes[9] = | |
22016ad3 | 46 | {"f", "p", "n", QChar(0x03BC), "m", "", "k", "M", "G"}; |
cdf7bea7 | 47 | const int Viewport::FirstSIPrefixPower = -15; |
22016ad3 | 48 | |
cdf7bea7 | 49 | Viewport::Viewport(View &parent) : |
adb4b10c JH |
50 | QGLWidget(&parent), |
51 | _view(parent) | |
6fa02541 | 52 | { |
d7002724 | 53 | setMouseTracking(true); |
3e46726a | 54 | setAutoFillBackground(false); |
d7002724 JH |
55 | } |
56 | ||
cdf7bea7 | 57 | int Viewport::get_total_height() const |
a429590b | 58 | { |
adb4b10c JH |
59 | int height = 0; |
60 | BOOST_FOREACH(const shared_ptr<Signal> s, | |
1d19ef83 | 61 | _view.session().get_signals()) { |
adb4b10c | 62 | assert(s); |
1d8dca91 | 63 | height += View::SignalHeight; |
adb4b10c JH |
64 | } |
65 | ||
66 | return height; | |
a429590b JH |
67 | } |
68 | ||
cdf7bea7 | 69 | void Viewport::initializeGL() |
d7002724 | 70 | { |
d7002724 JH |
71 | } |
72 | ||
cdf7bea7 | 73 | void Viewport::resizeGL(int width, int height) |
d7002724 | 74 | { |
04abfae9 | 75 | setup_viewport(width, height); |
d7002724 JH |
76 | } |
77 | ||
cdf7bea7 | 78 | void Viewport::paintEvent(QPaintEvent *event) |
d7002724 | 79 | { |
3e46726a | 80 | int offset; |
e3f65ace | 81 | |
e3f65ace | 82 | const vector< shared_ptr<Signal> > &sigs = |
1d19ef83 | 83 | _view.session().get_signals(); |
3e46726a JH |
84 | |
85 | // Prepare for OpenGL rendering | |
86 | makeCurrent(); | |
87 | glMatrixMode(GL_MODELVIEW); | |
88 | glPushMatrix(); | |
89 | ||
04abfae9 | 90 | setup_viewport(width(), height()); |
3e46726a JH |
91 | |
92 | qglClearColor(Qt::white); | |
93 | glClear(GL_COLOR_BUFFER_BIT); | |
94 | ||
95 | // Plot the signal | |
aeed8b41 | 96 | glEnable(GL_SCISSOR_TEST); |
1d8dca91 | 97 | glScissor(0, 0, width(), height()); |
cdf7bea7 | 98 | offset = View::RulerHeight - _view.v_offset(); |
3e46726a JH |
99 | BOOST_FOREACH(const shared_ptr<Signal> s, sigs) |
100 | { | |
101 | assert(s); | |
102 | ||
1d8dca91 JH |
103 | const QRect signal_rect(0, offset, |
104 | width(), View::SignalHeight); | |
3e46726a | 105 | |
adb4b10c | 106 | s->paint(*this, signal_rect, _view.scale(), _view.offset()); |
3e46726a | 107 | |
1d8dca91 | 108 | offset += View::SignalHeight; |
3e46726a JH |
109 | } |
110 | ||
aeed8b41 JH |
111 | glDisable(GL_SCISSOR_TEST); |
112 | ||
3e46726a JH |
113 | // Prepare for QPainter rendering |
114 | glMatrixMode(GL_MODELVIEW); | |
115 | glPopMatrix(); | |
116 | ||
117 | QPainter painter(this); | |
118 | painter.setRenderHint(QPainter::Antialiasing); | |
119 | ||
e9c41f8c | 120 | // Paint the ruler |
04abfae9 | 121 | paint_ruler(painter); |
e9c41f8c | 122 | |
3e46726a | 123 | painter.end(); |
6fa02541 | 124 | } |
009e1503 | 125 | |
cdf7bea7 | 126 | void Viewport::mousePressEvent(QMouseEvent *event) |
7cd5faf8 JH |
127 | { |
128 | assert(event); | |
1dd95c70 JH |
129 | |
130 | _mouse_down_point = event->pos(); | |
adb4b10c | 131 | _mouse_down_offset = _view.offset(); |
7cd5faf8 JH |
132 | } |
133 | ||
cdf7bea7 | 134 | void Viewport::mouseMoveEvent(QMouseEvent *event) |
7cd5faf8 JH |
135 | { |
136 | assert(event); | |
1dd95c70 JH |
137 | |
138 | if(event->buttons() & Qt::LeftButton) | |
139 | { | |
adb4b10c JH |
140 | _view.set_scale_offset(_view.scale(), |
141 | _mouse_down_offset + | |
142 | (_mouse_down_point - event->pos()).x() * | |
143 | _view.scale()); | |
1dd95c70 | 144 | } |
7cd5faf8 JH |
145 | } |
146 | ||
cdf7bea7 | 147 | void Viewport::mouseReleaseEvent(QMouseEvent *event) |
7cd5faf8 JH |
148 | { |
149 | assert(event); | |
1dd95c70 | 150 | } |
7cd5faf8 | 151 | |
cdf7bea7 | 152 | void Viewport::wheelEvent(QWheelEvent *event) |
1dd95c70 JH |
153 | { |
154 | assert(event); | |
1d8dca91 | 155 | _view.zoom(event->delta() / 120, event->x()); |
7cd5faf8 JH |
156 | } |
157 | ||
cdf7bea7 | 158 | void Viewport::setup_viewport(int width, int height) |
3e46726a JH |
159 | { |
160 | glViewport(0, 0, (GLint)width, (GLint)height); | |
161 | glMatrixMode(GL_PROJECTION); | |
162 | glLoadIdentity(); | |
163 | glOrtho(0, width, height, 0, -1, 1); | |
164 | glMatrixMode(GL_MODELVIEW); | |
165 | } | |
e9c41f8c | 166 | |
cdf7bea7 | 167 | void Viewport::paint_ruler(QPainter &p) |
e9c41f8c | 168 | { |
22016ad3 | 169 | const double MinSpacing = 80; |
e9c41f8c | 170 | |
adb4b10c | 171 | const double min_period = _view.scale() * MinSpacing; |
e9c41f8c | 172 | |
22016ad3 JH |
173 | const int order = (int)floorf(log10f(min_period)); |
174 | const double order_decimal = pow(10, order); | |
175 | ||
176 | int unit = 0; | |
177 | double tick_period = 0.0f; | |
178 | ||
179 | do | |
e9c41f8c | 180 | { |
22016ad3 JH |
181 | tick_period = order_decimal * ScaleUnits[unit++]; |
182 | } while(tick_period < min_period && unit < countof(ScaleUnits)); | |
e9c41f8c | 183 | |
22016ad3 JH |
184 | const int prefix = (order - FirstSIPrefixPower) / 3; |
185 | assert(prefix >= 0); | |
186 | assert(prefix < countof(SIPrefixes)); | |
e9c41f8c | 187 | |
22016ad3 JH |
188 | const int text_height = p.boundingRect(0, 0, INT_MAX, INT_MAX, |
189 | Qt::AlignLeft | Qt::AlignTop, "8").height(); | |
e9c41f8c | 190 | |
22016ad3 | 191 | // Draw the tick marks |
e9c41f8c JH |
192 | p.setPen(Qt::black); |
193 | ||
438440ea | 194 | const double minor_tick_period = tick_period / MinorTickSubdivision; |
adb4b10c JH |
195 | const double first_major_division = |
196 | floor(_view.offset() / tick_period); | |
197 | const double first_minor_division = | |
198 | ceil(_view.offset() / minor_tick_period); | |
438440ea JH |
199 | const double t0 = first_major_division * tick_period; |
200 | ||
201 | int division = (int)round(first_minor_division - | |
202 | first_major_division * MinorTickSubdivision); | |
203 | while(1) | |
e9c41f8c | 204 | { |
438440ea | 205 | const double t = t0 + division * minor_tick_period; |
1d8dca91 | 206 | const double x = (t - _view.offset()) / _view.scale(); |
438440ea JH |
207 | |
208 | if(x >= width()) | |
209 | break; | |
210 | ||
211 | if(division % MinorTickSubdivision == 0) | |
212 | { | |
213 | // Draw a major tick | |
214 | QString s; | |
215 | QTextStream ts(&s); | |
216 | ts << (t / order_decimal) << SIPrefixes[prefix] << "s"; | |
217 | p.drawText(x, 0, 0, text_height, Qt::AlignCenter | Qt::AlignTop | | |
218 | Qt::TextDontClip, s); | |
cdf7bea7 | 219 | p.drawLine(x, text_height, x, View::RulerHeight); |
438440ea JH |
220 | } |
221 | else | |
222 | { | |
223 | // Draw a minor tick | |
adb4b10c | 224 | p.drawLine(x, |
cdf7bea7 JH |
225 | (text_height + View::RulerHeight) / 2, x, |
226 | View::RulerHeight); | |
438440ea JH |
227 | } |
228 | ||
229 | division++; | |
e9c41f8c JH |
230 | } |
231 | } | |
cdf7bea7 JH |
232 | |
233 | } // namespace view | |
234 | } // namespace pv |