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, see <http://www.gnu.org/licenses/>.
27 #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;
54 const QColor AnalogSignal::SignalColours[4] = {
55 QColor(0xC4, 0xA0, 0x00), // Yellow
56 QColor(0x87, 0x20, 0x7A), // Magenta
57 QColor(0x20, 0x4A, 0x87), // Blue
58 QColor(0x4E, 0x9A, 0x06) // Green
61 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40*256/100);
62 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20*256/100);
64 const float AnalogSignal::EnvelopeThreshold = 256.0f;
66 const int AnalogSignal::MaximumVDivs = 10;
67 const int AnalogSignal::MinScaleIndex = -6;
68 const int AnalogSignal::MaxScaleIndex = 7;
70 const int AnalogSignal::InfoTextMarginRight = 20;
71 const int AnalogSignal::InfoTextMarginBottom = 5;
73 AnalogSignal::AnalogSignal(
75 shared_ptr<data::SignalBase> base) :
76 Signal(session, base),
77 scale_index_(4), // 20 per div
78 scale_index_drag_offset_(0),
79 div_height_(3 * QFontMetrics(QApplication::font()).height()),
85 base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]);
89 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
91 return base_->analog_data();
94 void AnalogSignal::save_settings(QSettings &settings) const
96 settings.setValue("pos_vdivs", pos_vdivs_);
97 settings.setValue("neg_vdivs", neg_vdivs_);
98 settings.setValue("scale_index", scale_index_);
99 settings.setValue("autoranging", autoranging_);
102 void AnalogSignal::restore_settings(QSettings &settings)
104 if (settings.contains("pos_vdivs"))
105 pos_vdivs_ = settings.value("pos_vdivs").toInt();
107 if (settings.contains("neg_vdivs"))
108 neg_vdivs_ = settings.value("neg_vdivs").toInt();
110 if (settings.contains("scale_index")) {
111 scale_index_ = settings.value("scale_index").toInt();
115 if (settings.contains("autoranging"))
116 autoranging_ = settings.value("autoranging").toBool();
119 std::pair<int, int> AnalogSignal::v_extents() const
121 const int ph = pos_vdivs_ * div_height_;
122 const int nh = neg_vdivs_ * div_height_;
123 return make_pair(-ph, nh);
126 int AnalogSignal::scale_handle_offset() const
128 const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
130 return ((scale_index_drag_offset_ - scale_index_) *
134 void AnalogSignal::scale_handle_dragged(int offset)
136 const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
138 scale_index_ = scale_index_drag_offset_ -
139 (offset + h / 2) / (h / 4);
144 void AnalogSignal::scale_handle_drag_release()
146 scale_index_drag_offset_ = scale_index_;
150 void AnalogSignal::paint_back(QPainter &p, const ViewItemPaintParams &pp)
152 if (base_->enabled()) {
153 Trace::paint_back(p, pp);
154 paint_axis(p, pp, get_visual_y());
158 void AnalogSignal::paint_mid(QPainter &p, const ViewItemPaintParams &pp)
160 assert(base_->analog_data());
163 const int y = get_visual_y();
165 if (!base_->enabled())
168 paint_grid(p, y, pp.left(), pp.right());
170 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
171 base_->analog_data()->analog_segments();
172 if (segments.empty())
175 const shared_ptr<pv::data::AnalogSegment> &segment =
178 const double pixels_offset = pp.pixels_offset();
179 const double samplerate = max(1.0, segment->samplerate());
180 const pv::util::Timestamp& start_time = segment->start_time();
181 const int64_t last_sample = segment->get_sample_count() - 1;
182 const double samples_per_pixel = samplerate * pp.scale();
183 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
184 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
186 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
187 (int64_t)0), last_sample);
188 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
189 (int64_t)0), last_sample);
191 if (samples_per_pixel < EnvelopeThreshold)
192 paint_trace(p, segment, y, pp.left(),
193 start_sample, end_sample,
194 pixels_offset, samples_per_pixel);
196 paint_envelope(p, segment, y, pp.left(),
197 start_sample, end_sample,
198 pixels_offset, samples_per_pixel);
201 void AnalogSignal::paint_fore(QPainter &p, const ViewItemPaintParams &pp)
206 const int y = get_visual_y();
208 // Show the info section on the right side of the trace
209 const QString infotext = QString("%1 V/div").arg(resolution_);
211 p.setPen(base_->colour());
212 p.setFont(QApplication::font());
214 const QRectF bounding_rect = QRectF(pp.left(),
215 y + v_extents().first,
216 pp.width() - InfoTextMarginRight,
217 v_extents().second - v_extents().first - InfoTextMarginBottom);
219 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
222 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
224 p.setRenderHint(QPainter::Antialiasing, false);
226 if (pos_vdivs_ > 0) {
227 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
228 for (int i = 1; i <= pos_vdivs_; i++) {
229 const float dy = i * div_height_;
230 p.drawLine(QLineF(left, y - dy, right, y - dy));
233 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
234 for (int i = 0; i < pos_vdivs_; i++) {
235 const float dy = i * div_height_;
236 const float dy25 = dy + (0.25 * div_height_);
237 const float dy50 = dy + (0.50 * div_height_);
238 const float dy75 = dy + (0.75 * div_height_);
239 p.drawLine(QLineF(left, y - dy25, right, y - dy25));
240 p.drawLine(QLineF(left, y - dy50, right, y - dy50));
241 p.drawLine(QLineF(left, y - dy75, right, y - dy75));
245 if (neg_vdivs_ > 0) {
246 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
247 for (int i = 1; i <= neg_vdivs_; i++) {
248 const float dy = i * div_height_;
249 p.drawLine(QLineF(left, y + dy, right, y + dy));
252 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
253 for (int i = 0; i < neg_vdivs_; i++) {
254 const float dy = i * div_height_;
255 const float dy25 = dy + (0.25 * div_height_);
256 const float dy50 = dy + (0.50 * div_height_);
257 const float dy75 = dy + (0.75 * div_height_);
258 p.drawLine(QLineF(left, y + dy25, right, y + dy25));
259 p.drawLine(QLineF(left, y + dy50, right, y + dy50));
260 p.drawLine(QLineF(left, y + dy75, right, y + dy75));
264 p.setRenderHint(QPainter::Antialiasing, true);
267 void AnalogSignal::paint_trace(QPainter &p,
268 const shared_ptr<pv::data::AnalogSegment> &segment,
269 int y, int left, const int64_t start, const int64_t end,
270 const double pixels_offset, const double samples_per_pixel)
272 p.setPen(base_->colour());
274 QPointF *points = new QPointF[end - start];
275 QPointF *point = points;
277 pv::data::SegmentAnalogDataIterator* it =
278 segment->begin_sample_iteration(start);
280 for (int64_t sample = start; sample != end; sample++) {
281 const float x = (sample / samples_per_pixel -
282 pixels_offset) + left;
284 *point++ = QPointF(x, y - *((float*)it->value) * scale_);
285 segment->continue_sample_iteration(it, 1);
287 segment->end_sample_iteration(it);
289 p.drawPolyline(points, point - points);
294 void AnalogSignal::paint_envelope(QPainter &p,
295 const shared_ptr<pv::data::AnalogSegment> &segment,
296 int y, int left, const int64_t start, const int64_t end,
297 const double pixels_offset, const double samples_per_pixel)
299 using pv::data::AnalogSegment;
301 AnalogSegment::EnvelopeSection e;
302 segment->get_envelope_section(e, start, end, samples_per_pixel);
307 p.setPen(QPen(Qt::NoPen));
308 p.setBrush(base_->colour());
310 QRectF *const rects = new QRectF[e.length];
311 QRectF *rect = rects;
313 for (uint64_t sample = 0; sample < e.length-1; sample++) {
314 const float x = ((e.scale * sample + e.start) /
315 samples_per_pixel - pixels_offset) + left;
316 const AnalogSegment::EnvelopeSample *const s =
319 // We overlap this sample with the next so that vertical
320 // gaps do not appear during steep rising or falling edges
321 const float b = y - max(s->max, (s+1)->min) * scale_;
322 const float t = y - min(s->min, (s+1)->max) * scale_;
325 if (h >= 0.0f && h <= 1.0f)
327 if (h <= 0.0f && h >= -1.0f)
330 *rect++ = QRectF(x, t, 1.0f, h);
333 p.drawRects(rects, e.length);
339 float AnalogSignal::get_resolution(int scale_index)
341 const float seq[] = {1.0f, 2.0f, 5.0f};
343 const int offset = std::numeric_limits<int>::max() / (2 * countof(seq));
344 const std::div_t d = std::div(
345 (int)(scale_index + countof(seq) * offset),
348 return powf(10.0f, d.quot - offset) * seq[d.rem];
351 void AnalogSignal::update_scale()
353 resolution_ = get_resolution(scale_index_);
354 scale_ = div_height_ / resolution_;
357 void AnalogSignal::perform_autoranging(bool force_update)
359 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
360 base_->analog_data()->analog_segments();
362 if (segments.empty())
365 static double prev_min = 0, prev_max = 0;
366 double min = 0, max = 0;
368 for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
369 std::pair<double, double> mm = segment->get_min_max();
370 min = std::min(min, mm.first);
371 max = std::max(max, mm.second);
374 if ((min == prev_min) && (max == prev_max) && !force_update)
380 // Use all divs for the positive range if there are no negative values
381 if ((min == 0) && (neg_vdivs_ > 0)) {
382 pos_vdivs_ += neg_vdivs_;
386 double min_value_per_div;
387 if ((pos_vdivs_ > 0) && (neg_vdivs_ > 0))
388 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
389 else if (pos_vdivs_ > 0)
390 min_value_per_div = max / pos_vdivs_;
392 min_value_per_div = -min / neg_vdivs_;
394 // Find first scale value that is bigger than the value we need
395 for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
396 if (get_resolution(i) > min_value_per_div) {
404 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
406 // Add the standard options
407 Signal::populate_popup_form(parent, form);
409 QFormLayout *const layout = new QFormLayout;
411 // Add the number of vdivs
412 QSpinBox *pvdiv_sb = new QSpinBox(parent);
413 pvdiv_sb->setRange(0, MaximumVDivs);
414 pvdiv_sb->setValue(pos_vdivs_);
415 connect(pvdiv_sb, SIGNAL(valueChanged(int)),
416 this, SLOT(on_pos_vdivs_changed(int)));
417 layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb);
419 QSpinBox *nvdiv_sb = new QSpinBox(parent);
420 nvdiv_sb->setRange(0, MaximumVDivs);
421 nvdiv_sb->setValue(neg_vdivs_);
422 connect(nvdiv_sb, SIGNAL(valueChanged(int)),
423 this, SLOT(on_neg_vdivs_changed(int)));
424 layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb);
426 // Add the vertical resolution
427 resolution_cb_ = new QComboBox(parent);
429 for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
430 const QString label = QString("%1").arg(get_resolution(i));
431 resolution_cb_->insertItem(0, label, QVariant(i));
434 const int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
435 resolution_cb_->setCurrentIndex(cur_idx);
437 connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
438 this, SLOT(on_resolution_changed(int)));
440 QGridLayout *const vdiv_layout = new QGridLayout;
441 QLabel *const vdiv_unit = new QLabel(tr("V/div"));
442 vdiv_layout->addWidget(resolution_cb_, 0, 0);
443 vdiv_layout->addWidget(vdiv_unit, 0, 1);
445 layout->addRow(tr("Vertical resolution"), vdiv_layout);
447 // Add the autoranging checkbox
448 QCheckBox* autoranging_cb = new QCheckBox();
449 autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
451 connect(autoranging_cb, SIGNAL(stateChanged(int)),
452 this, SLOT(on_autoranging_changed(int)));
454 layout->addRow(tr("Autoranging"), autoranging_cb);
456 form->addRow(layout);
459 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
464 perform_autoranging(true);
467 // Call order is important, otherwise the lazy event handler won't work
468 owner_->extents_changed(false, true);
469 owner_->row_item_appearance_changed(false, true);
473 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
478 perform_autoranging(true);
481 // Call order is important, otherwise the lazy event handler won't work
482 owner_->extents_changed(false, true);
483 owner_->row_item_appearance_changed(false, true);
487 void AnalogSignal::on_resolution_changed(int index)
489 scale_index_ = resolution_cb_->itemData(index).toInt();
493 owner_->row_item_appearance_changed(false, true);
496 void AnalogSignal::on_autoranging_changed(int state)
498 autoranging_ = (state == Qt::Checked);
501 perform_autoranging(true);
504 owner_->row_item_appearance_changed(false, true);
507 } // namespace TraceView