2 * This file is part of the sigrok project.
4 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
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.
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.
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
23 #include "sigsession.h"
28 #include <QMouseEvent>
29 #include <QTextStream>
33 #include <boost/foreach.hpp>
35 using namespace boost;
38 const int SigView::SignalHeight = 50;
39 const int SigView::LabelMarginWidth = 70;
40 const int SigView::RulerHeight = 30;
42 const int SigView::MinorTickSubdivision = 4;
43 const int SigView::ScaleUnits[3] = {1, 2, 5};
45 const QString SigView::SIPrefixes[9] =
46 {"f", "p", "n", QChar(0x03BC), "m", "", "k", "M", "G"};
47 const int SigView::FirstSIPrefixPower = -15;
49 SigView::SigView(SigSession &session, QWidget *parent) :
55 connect(&_session, SIGNAL(dataUpdated()),
56 this, SLOT(dataUpdated()));
58 setMouseTracking(true);
59 setAutoFillBackground(false);
62 void SigView::initializeGL()
66 void SigView::resizeGL(int width, int height)
68 setupViewport(width, height);
71 void SigView::paintEvent(QPaintEvent *event)
75 const vector< shared_ptr<Signal> > &sigs =
76 _session.get_signals();
78 // Prepare for OpenGL rendering
80 glMatrixMode(GL_MODELVIEW);
83 setupViewport(width(), height());
85 qglClearColor(Qt::white);
86 glClear(GL_COLOR_BUFFER_BIT);
90 BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
94 const QRect signal_rect(LabelMarginWidth, offset,
95 width() - LabelMarginWidth, SignalHeight);
97 s->paint(*this, signal_rect, _scale, _offset);
99 offset += SignalHeight;
102 // Prepare for QPainter rendering
103 glMatrixMode(GL_MODELVIEW);
106 QPainter painter(this);
107 painter.setRenderHint(QPainter::Antialiasing);
110 offset = RulerHeight;
111 BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
115 const QRect label_rect(0, offset,
116 LabelMarginWidth, SignalHeight);
117 s->paint_label(painter, label_rect);
119 offset += SignalHeight;
128 void SigView::dataUpdated()
133 void SigView::mouseMoveEvent(QMouseEvent *event)
138 void SigView::mousePressEvent(QMouseEvent *event)
143 void SigView::mouseReleaseEvent(QMouseEvent *event)
147 const double cursor_offset = _offset + _scale * (double)event->x();
149 switch(event->button())
155 case Qt::RightButton:
160 _offset = cursor_offset - _scale * (double)event->x();
165 void SigView::setupViewport(int width, int height)
167 glViewport(0, 0, (GLint)width, (GLint)height);
168 glMatrixMode(GL_PROJECTION);
170 glOrtho(0, width, height, 0, -1, 1);
171 glMatrixMode(GL_MODELVIEW);
174 void SigView::paintRuler(QPainter &p)
176 const double MinSpacing = 80;
178 const double min_period = _scale * MinSpacing;
180 const int order = (int)floorf(log10f(min_period));
181 const double order_decimal = pow(10, order);
184 double tick_period = 0.0f;
188 tick_period = order_decimal * ScaleUnits[unit++];
189 } while(tick_period < min_period && unit < countof(ScaleUnits));
191 const int prefix = (order - FirstSIPrefixPower) / 3;
193 assert(prefix < countof(SIPrefixes));
195 const int text_height = p.boundingRect(0, 0, INT_MAX, INT_MAX,
196 Qt::AlignLeft | Qt::AlignTop, "8").height();
198 // Draw the tick marks
201 const double minor_tick_period = tick_period / MinorTickSubdivision;
202 const double first_major_division = floor(_offset / tick_period);
203 const double first_minor_division = ceil(_offset / minor_tick_period);
204 const double t0 = first_major_division * tick_period;
206 int division = (int)round(first_minor_division -
207 first_major_division * MinorTickSubdivision);
210 const double t = t0 + division * minor_tick_period;
211 const double x = (t - _offset) / _scale + LabelMarginWidth;
216 if(division % MinorTickSubdivision == 0)
221 ts << (t / order_decimal) << SIPrefixes[prefix] << "s";
222 p.drawText(x, 0, 0, text_height, Qt::AlignCenter | Qt::AlignTop |
223 Qt::TextDontClip, s);
224 p.drawLine(x, text_height, x, RulerHeight);
229 p.drawLine(x, (text_height + RulerHeight) / 2, x, RulerHeight);