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