2 * This file is part of the PulseView 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
28 #include <QApplication>
30 #include <QFormLayout>
31 #include <QGridLayout>
36 #include "analogsignal.hpp"
37 #include "pv/data/analog.hpp"
38 #include "pv/data/analogsegment.hpp"
39 #include "pv/data/signalbase.hpp"
40 #include "pv/view/view.hpp"
42 #include <libsigrokcxx/libsigrokcxx.hpp>
47 using std::shared_ptr;
53 const QColor AnalogSignal::SignalColours[4] = {
54 QColor(0xC4, 0xA0, 0x00), // Yellow
55 QColor(0x87, 0x20, 0x7A), // Magenta
56 QColor(0x20, 0x4A, 0x87), // Blue
57 QColor(0x4E, 0x9A, 0x06) // Green
60 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40*256/100);
61 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20*256/100);
63 const float AnalogSignal::EnvelopeThreshold = 256.0f;
65 const int AnalogSignal::MaximumVDivs = 10;
66 const int AnalogSignal::MinScaleIndex = -6;
67 const int AnalogSignal::MaxScaleIndex = 7;
69 const int AnalogSignal::InfoTextMarginRight = 20;
70 const int AnalogSignal::InfoTextMarginBottom = 5;
72 AnalogSignal::AnalogSignal(
74 shared_ptr<data::SignalBase> channel,
75 shared_ptr<data::Analog> data) :
76 Signal(session, channel),
78 scale_index_(4), // 20 per div
79 scale_index_drag_offset_(0),
80 div_height_(3 * QFontMetrics(QApplication::font()).height()),
84 channel_->set_colour(SignalColours[channel_->index() % countof(SignalColours)]);
88 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
93 shared_ptr<pv::data::Analog> AnalogSignal::analog_data() const
98 std::pair<int, int> AnalogSignal::v_extents() const
100 const int h = vdivs_ * div_height_;
101 return make_pair(-h, h);
104 int AnalogSignal::scale_handle_offset() const
106 const int h = vdivs_ * div_height_;
108 return ((scale_index_drag_offset_ - scale_index_) *
112 void AnalogSignal::scale_handle_dragged(int offset)
114 const int h = vdivs_ * div_height_;
116 scale_index_ = scale_index_drag_offset_ -
117 (offset + h / 2) / (h / 4);
122 void AnalogSignal::scale_handle_drag_release()
124 scale_index_drag_offset_ = scale_index_;
128 void AnalogSignal::paint_back(QPainter &p, const ViewItemPaintParams &pp)
130 if (channel_->enabled()) {
131 Trace::paint_back(p, pp);
132 paint_axis(p, pp, get_visual_y());
136 void AnalogSignal::paint_mid(QPainter &p, const ViewItemPaintParams &pp)
141 const int y = get_visual_y();
143 if (!channel_->enabled())
146 paint_grid(p, y, pp.left(), pp.right());
148 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
149 data_->analog_segments();
150 if (segments.empty())
153 const shared_ptr<pv::data::AnalogSegment> &segment =
156 const double pixels_offset = pp.pixels_offset();
157 const double samplerate = max(1.0, segment->samplerate());
158 const pv::util::Timestamp& start_time = segment->start_time();
159 const int64_t last_sample = segment->get_sample_count() - 1;
160 const double samples_per_pixel = samplerate * pp.scale();
161 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
162 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
164 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
165 (int64_t)0), last_sample);
166 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
167 (int64_t)0), last_sample);
169 if (samples_per_pixel < EnvelopeThreshold)
170 paint_trace(p, segment, y, pp.left(),
171 start_sample, end_sample,
172 pixels_offset, samples_per_pixel);
174 paint_envelope(p, segment, y, pp.left(),
175 start_sample, end_sample,
176 pixels_offset, samples_per_pixel);
179 void AnalogSignal::paint_fore(QPainter &p, const ViewItemPaintParams &pp)
184 const int y = get_visual_y();
186 // Show the info section on the right side of the trace
187 const QString infotext = QString("%1 V/div").arg(resolution_);
189 p.setPen(channel_->colour());
190 p.setFont(QApplication::font());
192 const QRectF bounding_rect = QRectF(pp.left(),
193 y + v_extents().first,
194 pp.width() - InfoTextMarginRight,
195 v_extents().second - v_extents().first - InfoTextMarginBottom);
197 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
200 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
202 p.setRenderHint(QPainter::Antialiasing, false);
204 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
205 for (int i = 1; i <= vdivs_; i++) {
206 const float dy = i * div_height_;
207 p.drawLine(QLineF(left, y - dy, right, y - dy));
208 p.drawLine(QLineF(left, y + dy, right, y + dy));
211 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
212 for (int i = 0; i < vdivs_; i++) {
213 const float dy = i * div_height_;
214 const float dy25 = dy + (0.25 * div_height_);
215 const float dy50 = dy + (0.50 * div_height_);
216 const float dy75 = dy + (0.75 * div_height_);
217 p.drawLine(QLineF(left, y - dy25, right, y - dy25));
218 p.drawLine(QLineF(left, y + dy25, right, y + dy25));
219 p.drawLine(QLineF(left, y - dy50, right, y - dy50));
220 p.drawLine(QLineF(left, y + dy50, right, y + dy50));
221 p.drawLine(QLineF(left, y - dy75, right, y - dy75));
222 p.drawLine(QLineF(left, y + dy75, right, y + dy75));
225 p.setRenderHint(QPainter::Antialiasing, true);
228 void AnalogSignal::paint_trace(QPainter &p,
229 const shared_ptr<pv::data::AnalogSegment> &segment,
230 int y, int left, const int64_t start, const int64_t end,
231 const double pixels_offset, const double samples_per_pixel)
233 const int64_t sample_count = end - start;
235 const float *const samples = segment->get_samples(start, end);
238 p.setPen(channel_->colour());
240 QPointF *points = new QPointF[sample_count];
241 QPointF *point = points;
243 for (int64_t sample = start; sample != end; sample++) {
244 const float x = (sample / samples_per_pixel -
245 pixels_offset) + left;
246 *point++ = QPointF(x,
247 y - samples[sample - start] * scale_);
250 p.drawPolyline(points, point - points);
256 void AnalogSignal::paint_envelope(QPainter &p,
257 const shared_ptr<pv::data::AnalogSegment> &segment,
258 int y, int left, const int64_t start, const int64_t end,
259 const double pixels_offset, const double samples_per_pixel)
261 using pv::data::AnalogSegment;
263 AnalogSegment::EnvelopeSection e;
264 segment->get_envelope_section(e, start, end, samples_per_pixel);
269 p.setPen(QPen(Qt::NoPen));
270 p.setBrush(channel_->colour());
272 QRectF *const rects = new QRectF[e.length];
273 QRectF *rect = rects;
275 for (uint64_t sample = 0; sample < e.length-1; sample++) {
276 const float x = ((e.scale * sample + e.start) /
277 samples_per_pixel - pixels_offset) + left;
278 const AnalogSegment::EnvelopeSample *const s =
281 // We overlap this sample with the next so that vertical
282 // gaps do not appear during steep rising or falling edges
283 const float b = y - max(s->max, (s+1)->min) * scale_;
284 const float t = y - min(s->min, (s+1)->max) * scale_;
287 if (h >= 0.0f && h <= 1.0f)
289 if (h <= 0.0f && h >= -1.0f)
292 *rect++ = QRectF(x, t, 1.0f, h);
295 p.drawRects(rects, e.length);
301 float AnalogSignal::get_resolution(int scale_index)
303 const float seq[] = {1.0f, 2.0f, 5.0f};
305 const int offset = std::numeric_limits<int>::max() / (2 * countof(seq));
306 const std::div_t d = std::div(
307 (int)(scale_index + countof(seq) * offset),
310 return powf(10.0f, d.quot - offset) * seq[d.rem];
313 void AnalogSignal::update_scale()
315 resolution_ = get_resolution(scale_index_);
316 scale_ = div_height_ / resolution_;
319 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
321 // Add the standard options
322 Signal::populate_popup_form(parent, form);
324 QFormLayout *const layout = new QFormLayout;
326 // Add the number of vdivs
327 QSpinBox *vdiv_sb = new QSpinBox(parent);
328 vdiv_sb->setRange(1, MaximumVDivs);
329 vdiv_sb->setValue(vdivs_);
330 connect(vdiv_sb, SIGNAL(valueChanged(int)),
331 this, SLOT(on_vdivs_changed(int)));
332 layout->addRow(tr("Number of vertical divs"), vdiv_sb);
334 // Add the vertical resolution
335 resolution_cb_ = new QComboBox(parent);
337 for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
338 const QString label = QString("%1").arg(get_resolution(i));
339 resolution_cb_->insertItem(0, label, QVariant(i));
342 const int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
343 resolution_cb_->setCurrentIndex(cur_idx);
345 connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
346 this, SLOT(on_resolution_changed(int)));
348 QGridLayout *const vdiv_layout = new QGridLayout;
349 QLabel *const vdiv_unit = new QLabel(tr("V/div"));
350 vdiv_layout->addWidget(resolution_cb_, 0, 0);
351 vdiv_layout->addWidget(vdiv_unit, 0, 1);
353 layout->addRow(tr("Vertical resolution"), vdiv_layout);
355 form->addRow(layout);
358 void AnalogSignal::on_vdivs_changed(int vdivs)
363 // Call order is important, otherwise the lazy event handler won't work
364 owner_->extents_changed(false, true);
365 owner_->row_item_appearance_changed(false, true);
369 void AnalogSignal::on_resolution_changed(int index)
371 scale_index_ = resolution_cb_->itemData(index).toInt();
375 owner_->row_item_appearance_changed(false, true);