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[pulseview.git] / pv / views / trace / analogsignal.cpp
1 /*
2  * This file is part of the PulseView 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, see <http://www.gnu.org/licenses/>.
18  */
19
20 #include <extdef.h>
21
22 #include <cassert>
23 #include <cmath>
24 #include <cstdlib>
25 #include <limits>
26 #include <vector>
27
28 #include <QApplication>
29 #include <QCheckBox>
30 #include <QComboBox>
31 #include <QDebug>
32 #include <QFormLayout>
33 #include <QGridLayout>
34 #include <QLabel>
35 #include <QString>
36
37 #include "analogsignal.hpp"
38 #include "logicsignal.hpp"
39 #include "view.hpp"
40
41 #include "pv/util.hpp"
42 #include "pv/data/analog.hpp"
43 #include "pv/data/analogsegment.hpp"
44 #include "pv/data/logic.hpp"
45 #include "pv/data/logicsegment.hpp"
46 #include "pv/data/signalbase.hpp"
47 #include "pv/globalsettings.hpp"
48
49 #include <libsigrokcxx/libsigrokcxx.hpp>
50
51 using std::deque;
52 using std::div;
53 using std::div_t;
54 // Note that "using std::isnan;" is _not_ put here since that would break
55 // compilation on some platforms. Use "std::isnan()" instead in checks below.
56 using std::max;
57 using std::make_pair;
58 using std::min;
59 using std::numeric_limits;
60 using std::out_of_range;
61 using std::pair;
62 using std::shared_ptr;
63 using std::vector;
64
65 using pv::data::LogicSegment;
66 using pv::data::SignalBase;
67 using pv::util::SIPrefix;
68
69 namespace pv {
70 namespace views {
71 namespace trace {
72
73 const QColor AnalogSignal::SignalColors[4] = {
74         QColor(0xC4, 0xA0, 0x00),       // Yellow
75         QColor(0x87, 0x20, 0x7A),       // Magenta
76         QColor(0x20, 0x4A, 0x87),       // Blue
77         QColor(0x4E, 0x9A, 0x06)        // Green
78 };
79
80 const QPen AnalogSignal::AxisPen(QColor(0, 0, 0, 30 * 256 / 100), 2);
81 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
82 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
83
84 const QColor AnalogSignal::SamplingPointColor(0x77, 0x77, 0x77);
85 const QColor AnalogSignal::SamplingPointColorLo = QColor(200, 0, 0, 80 * 256 / 100);
86 const QColor AnalogSignal::SamplingPointColorNe = QColor(0,   0, 0, 80 * 256 / 100);
87 const QColor AnalogSignal::SamplingPointColorHi = QColor(0, 200, 0, 80 * 256 / 100);
88
89 const QColor AnalogSignal::ThresholdColor = QColor(0, 0, 0, 30 * 256 / 100);
90 const QColor AnalogSignal::ThresholdColorLo = QColor(255, 0, 0, 8 * 256 / 100);
91 const QColor AnalogSignal::ThresholdColorNe = QColor(0,   0, 0, 10 * 256 / 100);
92 const QColor AnalogSignal::ThresholdColorHi = QColor(0, 255, 0, 8 * 256 / 100);
93
94 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
95 const float AnalogSignal::EnvelopeThreshold = 64.0f;
96
97 const int AnalogSignal::MaximumVDivs = 10;
98 const int AnalogSignal::MinScaleIndex = -6;
99 const int AnalogSignal::MaxScaleIndex = 7;
100
101 const int AnalogSignal::InfoTextMarginRight = 20;
102 const int AnalogSignal::InfoTextMarginBottom = 5;
103
104 AnalogSignal::AnalogSignal(
105         pv::Session &session,
106         shared_ptr<data::SignalBase> base) :
107         Signal(session, base),
108         value_at_hover_pos_(std::numeric_limits<float>::quiet_NaN()),
109         scale_index_(4), // 20 per div
110         pos_vdivs_(1),
111         neg_vdivs_(1),
112         resolution_(0),
113         display_type_(DisplayBoth),
114         autoranging_(true)
115 {
116         axis_pen_ = AxisPen;
117
118         pv::data::Analog* analog_data =
119                 dynamic_cast<pv::data::Analog*>(data().get());
120
121         connect(analog_data, SIGNAL(min_max_changed(float, float)),
122                 this, SLOT(on_min_max_changed(float, float)));
123
124         GlobalSettings settings;
125         show_sampling_points_ =
126                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
127         fill_high_areas_ =
128                 settings.value(GlobalSettings::Key_View_FillSignalHighAreas).toBool();
129         high_fill_color_ = QColor::fromRgba(settings.value(
130                 GlobalSettings::Key_View_FillSignalHighAreaColor).value<uint32_t>());
131         show_analog_minor_grid_ =
132                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
133         conversion_threshold_disp_mode_ =
134                 settings.value(GlobalSettings::Key_View_ConversionThresholdDispMode).toInt();
135         div_height_ = settings.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
136
137         base_->set_color(SignalColors[base_->index() % countof(SignalColors)]);
138         update_scale();
139 }
140
141 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
142 {
143         return base_->analog_data();
144 }
145
146 std::map<QString, QVariant> AnalogSignal::save_settings() const
147 {
148         std::map<QString, QVariant> result;
149
150         result["pos_vdivs"] = pos_vdivs_;
151         result["neg_vdivs"] = neg_vdivs_;
152         result["scale_index"] = scale_index_;
153         result["display_type"] = display_type_;
154         result["autoranging"] = pos_vdivs_;
155         result["div_height"] = div_height_;
156
157         return result;
158 }
159
160 void AnalogSignal::restore_settings(std::map<QString, QVariant> settings)
161 {
162         auto entry = settings.find("pos_vdivs");
163         if (entry != settings.end())
164                 pos_vdivs_ = settings["pos_vdivs"].toInt();
165
166         entry = settings.find("neg_vdivs");
167         if (entry != settings.end())
168                 neg_vdivs_ = settings["neg_vdivs"].toInt();
169
170         entry = settings.find("scale_index");
171         if (entry != settings.end()) {
172                 scale_index_ = settings["scale_index"].toInt();
173                 update_scale();
174         }
175
176         entry = settings.find("display_type");
177         if (entry != settings.end())
178                 display_type_ = (DisplayType)(settings["display_type"].toInt());
179
180         entry = settings.find("autoranging");
181         if (entry != settings.end())
182                 autoranging_ = settings["autoranging"].toBool();
183
184         entry = settings.find("div_height");
185         if (entry != settings.end()) {
186                 const int old_height = div_height_;
187                 div_height_ = settings["div_height"].toInt();
188
189                 if ((div_height_ != old_height) && owner_) {
190                         // Call order is important, otherwise the lazy event handler won't work
191                         owner_->extents_changed(false, true);
192                         owner_->row_item_appearance_changed(false, true);
193                 }
194         }
195 }
196
197 pair<int, int> AnalogSignal::v_extents() const
198 {
199         const int ph = pos_vdivs_ * div_height_;
200         const int nh = neg_vdivs_ * div_height_;
201         return make_pair(-ph, nh);
202 }
203
204 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
205 {
206         if (!base_->enabled())
207                 return;
208
209         bool paint_thr_bg =
210                 conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Background;
211
212         const vector<double> thresholds = base_->get_conversion_thresholds();
213
214         // Only display thresholds if we have some and we show analog samples
215         if ((thresholds.size() > 0) && paint_thr_bg &&
216                 ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))) {
217
218                 const int visual_y = get_visual_y();
219                 const pair<int, int> extents = v_extents();
220                 const int top = visual_y + extents.first;
221                 const int btm = visual_y + extents.second;
222
223                 // Draw high/neutral/low areas
224                 if (thresholds.size() == 2) {
225                         int thr_lo = visual_y - thresholds[0] * scale_;
226                         int thr_hi = visual_y - thresholds[1] * scale_;
227                         thr_lo = min(max(thr_lo, top), btm);
228                         thr_hi = min(max(thr_hi, top), btm);
229
230                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr_hi - top),
231                                 QBrush(ThresholdColorHi));
232                         p.fillRect(QRectF(pp.left(), thr_hi, pp.width(), thr_lo - thr_hi),
233                                 QBrush(ThresholdColorNe));
234                         p.fillRect(QRectF(pp.left(), thr_lo, pp.width(), btm - thr_lo),
235                                 QBrush(ThresholdColorLo));
236                 } else {
237                         int thr = visual_y - thresholds[0] * scale_;
238                         thr = min(max(thr, top), btm);
239
240                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr - top),
241                                 QBrush(ThresholdColorHi));
242                         p.fillRect(QRectF(pp.left(), thr, pp.width(), btm - thr),
243                                 QBrush(ThresholdColorLo));
244                 }
245
246                 paint_axis(p, pp, get_visual_y());
247         } else {
248                 Signal::paint_back(p, pp);
249                 paint_axis(p, pp, get_visual_y());
250         }
251 }
252
253 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
254 {
255         assert(base_->analog_data());
256         assert(owner_);
257
258         const int y = get_visual_y();
259
260         if (!base_->enabled())
261                 return;
262
263         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
264                 paint_grid(p, y, pp.left(), pp.right());
265
266                 shared_ptr<pv::data::AnalogSegment> segment = get_analog_segment_to_paint();
267                 if (!segment || (segment->get_sample_count() == 0))
268                         return;
269
270                 const double pixels_offset = pp.pixels_offset();
271                 const double samplerate = max(1.0, segment->samplerate());
272                 const pv::util::Timestamp& start_time = segment->start_time();
273                 const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
274                 const double samples_per_pixel = samplerate * pp.scale();
275                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
276                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
277
278                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
279                         (int64_t)0), last_sample);
280                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
281                         (int64_t)0), last_sample);
282
283                 if (samples_per_pixel < EnvelopeThreshold)
284                         paint_trace(p, segment, y, pp.left(), start_sample, end_sample,
285                                 pixels_offset, samples_per_pixel);
286                 else
287                         paint_envelope(p, segment, y, pp.left(), start_sample, end_sample,
288                                 pixels_offset, samples_per_pixel);
289         }
290
291         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
292                 paint_logic_mid(p, pp);
293 }
294
295 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
296 {
297         if (!enabled())
298                 return;
299
300         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
301                 const int y = get_visual_y();
302
303                 QString infotext;
304
305                 // Show the info section on the right side of the trace, including
306                 // the value at the hover point when the hover marker is enabled
307                 // and we have corresponding data available
308                 if (show_hover_marker_ && !std::isnan(value_at_hover_pos_)) {
309                         infotext = QString("[%1] %2 V/div")
310                                 .arg(format_value_si(value_at_hover_pos_, SIPrefix::unspecified, 2, "V", false))
311                                 .arg(resolution_);
312                 } else
313                         infotext = QString("%1 V/div").arg(resolution_);
314
315                 p.setPen(base_->color());
316                 p.setFont(QApplication::font());
317
318                 const QRectF bounding_rect = QRectF(pp.left(),
319                                 y + v_extents().first,
320                                 pp.width() - InfoTextMarginRight,
321                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
322
323                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
324         }
325
326         if (show_hover_marker_)
327                 paint_hover_marker(p);
328 }
329
330 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
331 {
332         bool was_antialiased = p.testRenderHint(QPainter::Antialiasing);
333         p.setRenderHint(QPainter::Antialiasing, false);
334
335         if (pos_vdivs_ > 0) {
336                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
337                 for (int i = 1; i <= pos_vdivs_; i++) {
338                         const float dy = i * div_height_;
339                         p.drawLine(QLineF(left, y - dy, right, y - dy));
340                 }
341         }
342
343         if ((pos_vdivs_ > 0) && show_analog_minor_grid_) {
344                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
345                 for (int i = 0; i < pos_vdivs_; i++) {
346                         const float dy = i * div_height_;
347                         const float dy25 = dy + (0.25 * div_height_);
348                         const float dy50 = dy + (0.50 * div_height_);
349                         const float dy75 = dy + (0.75 * div_height_);
350                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
351                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
352                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
353                 }
354         }
355
356         if (neg_vdivs_ > 0) {
357                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
358                 for (int i = 1; i <= neg_vdivs_; i++) {
359                         const float dy = i * div_height_;
360                         p.drawLine(QLineF(left, y + dy, right, y + dy));
361                 }
362         }
363
364         if ((pos_vdivs_ > 0) && show_analog_minor_grid_) {
365                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
366                 for (int i = 0; i < neg_vdivs_; i++) {
367                         const float dy = i * div_height_;
368                         const float dy25 = dy + (0.25 * div_height_);
369                         const float dy50 = dy + (0.50 * div_height_);
370                         const float dy75 = dy + (0.75 * div_height_);
371                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
372                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
373                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
374                 }
375         }
376
377         p.setRenderHint(QPainter::Antialiasing, was_antialiased);
378 }
379
380 void AnalogSignal::paint_trace(QPainter &p,
381         const shared_ptr<pv::data::AnalogSegment> &segment,
382         int y, int left, const int64_t start, const int64_t end,
383         const double pixels_offset, const double samples_per_pixel)
384 {
385         if (end <= start)
386                 return;
387
388         bool paint_thr_dots =
389                 (base_->get_conversion_type() != data::SignalBase::NoConversion) &&
390                 (conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Dots);
391
392         vector<double> thresholds;
393         if (paint_thr_dots)
394                 thresholds = base_->get_conversion_thresholds();
395
396         // Calculate and paint the sampling points if enabled and useful
397         GlobalSettings settings;
398         const bool show_sampling_points =
399                 (show_sampling_points_ || paint_thr_dots) && (samples_per_pixel < 0.25);
400
401         p.setPen(base_->color());
402
403         const int64_t points_count = end - start + 1;
404
405         QPointF *points = new QPointF[points_count];
406         QPointF *point = points;
407
408         vector<QRectF> sampling_points[3];
409
410         int64_t sample_count = min(points_count, TracePaintBlockSize);
411         int64_t block_sample = 0;
412         float *sample_block = new float[TracePaintBlockSize];
413         segment->get_samples(start, start + sample_count, sample_block);
414
415         if (show_hover_marker_)
416                 reset_pixel_values();
417
418         const int w = 2;
419         for (int64_t sample = start; sample <= end; sample++, block_sample++) {
420
421                 // Fetch next block of samples if we finished the current one
422                 if (block_sample == TracePaintBlockSize) {
423                         block_sample = 0;
424                         sample_count = min(points_count - sample, TracePaintBlockSize);
425                         segment->get_samples(sample, sample + sample_count, sample_block);
426                 }
427
428                 const float abs_x = sample / samples_per_pixel - pixels_offset;
429                 const float x = left + abs_x;
430
431                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
432
433                 // Generate the pixel<->value lookup table for the mouse hover
434                 if (show_hover_marker_)
435                         process_next_sample_value(abs_x, sample_block[block_sample]);
436
437                 // Create the sampling points if needed
438                 if (show_sampling_points) {
439                         int idx = 0;  // Neutral
440
441                         if (paint_thr_dots) {
442                                 if (thresholds.size() == 1)
443                                         idx = (sample_block[block_sample] >= thresholds[0]) ? 2 : 1;
444                                 else if (thresholds.size() == 2) {
445                                         if (sample_block[block_sample] > thresholds[1])
446                                                 idx = 2;  // High
447                                         else if (sample_block[block_sample] < thresholds[0])
448                                                 idx = 1;  // Low
449                                 }
450                         }
451
452                         sampling_points[idx].emplace_back(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
453                 }
454         }
455         delete[] sample_block;
456
457         // QPainter::drawPolyline() is slow, let's paint the lines ourselves
458         for (int64_t i = 1; i < points_count; i++)
459                 p.drawLine(points[i - 1], points[i]);
460
461         if (show_sampling_points) {
462                 if (paint_thr_dots) {
463                         p.setPen(SamplingPointColorNe);
464                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
465                         p.setPen(SamplingPointColorLo);
466                         p.drawRects(sampling_points[1].data(), sampling_points[1].size());
467                         p.setPen(SamplingPointColorHi);
468                         p.drawRects(sampling_points[2].data(), sampling_points[2].size());
469                 } else {
470                         p.setPen(SamplingPointColor);
471                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
472                 }
473         }
474
475         delete[] points;
476 }
477
478 void AnalogSignal::paint_envelope(QPainter &p,
479         const shared_ptr<pv::data::AnalogSegment> &segment,
480         int y, int left, const int64_t start, const int64_t end,
481         const double pixels_offset, const double samples_per_pixel)
482 {
483         using pv::data::AnalogSegment;
484
485         // Note: Envelope painting currently doesn't generate a pixel<->value lookup table
486         if (show_hover_marker_)
487                 reset_pixel_values();
488
489         AnalogSegment::EnvelopeSection e;
490         segment->get_envelope_section(e, start, end, samples_per_pixel);
491
492         if (e.length < 2)
493                 return;
494
495         p.setPen(QPen(Qt::NoPen));
496         p.setBrush(base_->color());
497
498         QRectF *const rects = new QRectF[e.length];
499         QRectF *rect = rects;
500
501         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
502                 const float x = ((e.scale * sample + e.start) /
503                         samples_per_pixel - pixels_offset) + left;
504
505                 const AnalogSegment::EnvelopeSample *const s = e.samples + sample;
506
507                 // We overlap this sample with the next so that vertical
508                 // gaps do not appear during steep rising or falling edges
509                 const float b = y - max(s->max, (s + 1)->min) * scale_;
510                 const float t = y - min(s->min, (s + 1)->max) * scale_;
511
512                 float h = b - t;
513                 if (h >= 0.0f && h <= 1.0f)
514                         h = 1.0f;
515                 if (h <= 0.0f && h >= -1.0f)
516                         h = -1.0f;
517
518                 *rect++ = QRectF(x, t, 1.0f, h);
519         }
520
521         p.drawRects(rects, e.length);
522
523         delete[] rects;
524         delete[] e.samples;
525 }
526
527 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
528 {
529         QLineF *line;
530
531         vector< pair<int64_t, bool> > edges;
532
533         assert(base_);
534
535         const int y = get_visual_y();
536
537         if (!base_->enabled() || !base_->logic_data())
538                 return;
539
540         const int signal_margin =
541                 QFontMetrics(QApplication::font()).height() / 2;
542
543         const int ph = min(pos_vdivs_, 1) * div_height_;
544         const int nh = min(neg_vdivs_, 1) * div_height_;
545         const float high_offset = y - ph + signal_margin + 0.5f;
546         const float low_offset = y + nh - signal_margin - 0.5f;
547         const float signal_height = low_offset - high_offset;
548
549         shared_ptr<pv::data::LogicSegment> segment = get_logic_segment_to_paint();
550         if (!segment || (segment->get_sample_count() == 0))
551                 return;
552
553         double samplerate = segment->samplerate();
554
555         // Show sample rate as 1Hz when it is unknown
556         if (samplerate == 0.0)
557                 samplerate = 1.0;
558
559         const double pixels_offset = pp.pixels_offset();
560         const pv::util::Timestamp& start_time = segment->start_time();
561         const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
562         const double samples_per_pixel = samplerate * pp.scale();
563         const double pixels_per_sample = 1 / samples_per_pixel;
564         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
565         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
566
567         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
568                 (int64_t)0), last_sample);
569         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
570                 (int64_t)0), last_sample);
571
572         segment->get_subsampled_edges(edges, start_sample, end_sample,
573                 samples_per_pixel / LogicSignal::Oversampling, 0);
574         assert(edges.size() >= 2);
575
576         const float first_sample_x =
577                 pp.left() + (edges.front().first / samples_per_pixel - pixels_offset);
578         const float last_sample_x =
579                 pp.left() + (edges.back().first / samples_per_pixel - pixels_offset);
580
581         // Check whether we need to paint the sampling points
582         const bool show_sampling_points = show_sampling_points_ && (samples_per_pixel < 0.25);
583         vector<QRectF> sampling_points;
584         float sampling_point_x = first_sample_x;
585         int64_t sampling_point_sample = start_sample;
586         const int w = 2;
587
588         if (show_sampling_points)
589                 sampling_points.reserve(end_sample - start_sample + 1);
590
591         vector<QRectF> high_rects;
592         float rising_edge_x;
593         bool rising_edge_seen = false;
594
595         // Paint the edges
596         const unsigned int edge_count = edges.size() - 2;
597         QLineF *const edge_lines = new QLineF[edge_count];
598         line = edge_lines;
599
600         if (edges.front().second) {
601                 // Beginning of trace is high
602                 rising_edge_x = first_sample_x;
603                 rising_edge_seen = true;
604         }
605
606         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
607                 // Note: multiple edges occupying a single pixel are represented by an edge
608                 // with undefined logic level. This means that only the first falling edge
609                 // after a rising edge corresponds to said rising edge - and vice versa. If
610                 // more edges with the same logic level follow, they denote multiple edges.
611
612                 const float x = pp.left() + ((*i).first / samples_per_pixel - pixels_offset);
613                 *line++ = QLineF(x, high_offset, x, low_offset);
614
615                 if (fill_high_areas_) {
616                         // Any edge terminates a high area
617                         if (rising_edge_seen) {
618                                 const int width = x - rising_edge_x;
619                                 if (width > 0)
620                                         high_rects.emplace_back(rising_edge_x, high_offset,
621                                                 width, signal_height);
622                                 rising_edge_seen = false;
623                         }
624
625                         // Only rising edges start high areas
626                         if ((*i).second) {
627                                 rising_edge_x = x;
628                                 rising_edge_seen = true;
629                         }
630                 }
631
632                 if (show_sampling_points)
633                         while (sampling_point_sample < (*i).first) {
634                                 const float y = (*i).second ? low_offset : high_offset;
635                                 sampling_points.emplace_back(
636                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
637                                 sampling_point_sample++;
638                                 sampling_point_x += pixels_per_sample;
639                         };
640         }
641
642         // Calculate the sample points from the last edge to the end of the trace
643         if (show_sampling_points)
644                 while ((uint64_t)sampling_point_sample <= end_sample) {
645                         // Signal changed after the last edge, so the level is inverted
646                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
647                         sampling_points.emplace_back(
648                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
649                         sampling_point_sample++;
650                         sampling_point_x += pixels_per_sample;
651                 };
652
653         if (fill_high_areas_) {
654                 // Add last high rectangle if the signal is still high at the end of the trace
655                 if (rising_edge_seen && (edges.cend() - 1)->second)
656                         high_rects.emplace_back(rising_edge_x, high_offset,
657                                 last_sample_x - rising_edge_x, signal_height);
658
659                 p.setPen(high_fill_color_);
660                 p.setBrush(high_fill_color_);
661                 p.drawRects((const QRectF*)(high_rects.data()), high_rects.size());
662         }
663
664         p.setPen(LogicSignal::EdgeColor);
665         p.drawLines(edge_lines, edge_count);
666         delete[] edge_lines;
667
668         // Paint the caps
669         const unsigned int max_cap_line_count = edges.size();
670         QLineF *const cap_lines = new QLineF[max_cap_line_count];
671
672         p.setPen(LogicSignal::HighColor);
673         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
674                 pixels_offset, pp.left(), high_offset);
675         p.setPen(LogicSignal::LowColor);
676         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
677                 pixels_offset, pp.left(), low_offset);
678
679         delete[] cap_lines;
680
681         // Paint the sampling points
682         if (show_sampling_points) {
683                 p.setPen(SamplingPointColor);
684                 p.drawRects(sampling_points.data(), sampling_points.size());
685         }
686 }
687
688 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
689         vector< pair<int64_t, bool> > &edges, bool level,
690         double samples_per_pixel, double pixels_offset, float x_offset,
691         float y_offset)
692 {
693         QLineF *line = lines;
694
695         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
696                 if ((*i).second == level) {
697                         *line++ = QLineF(
698                                 ((*i).first / samples_per_pixel -
699                                         pixels_offset) + x_offset, y_offset,
700                                 ((*(i+1)).first / samples_per_pixel -
701                                         pixels_offset) + x_offset, y_offset);
702                 }
703
704         p.drawLines(lines, line - lines);
705 }
706
707 shared_ptr<pv::data::AnalogSegment> AnalogSignal::get_analog_segment_to_paint() const
708 {
709         shared_ptr<pv::data::AnalogSegment> segment;
710
711         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
712                 base_->analog_data()->analog_segments();
713
714         if (!segments.empty()) {
715                 if (segment_display_mode_ == ShowLastSegmentOnly)
716                         segment = segments.back();
717
718                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
719                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
720                         try {
721                                 segment = segments.at(current_segment_);
722                         } catch (out_of_range&) {
723                                 qDebug() << "Current analog segment out of range for signal" << base_->name() << ":" << current_segment_;
724                         }
725                 }
726         }
727
728         return segment;
729 }
730
731 shared_ptr<pv::data::LogicSegment> AnalogSignal::get_logic_segment_to_paint() const
732 {
733         shared_ptr<pv::data::LogicSegment> segment;
734
735         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
736                 base_->logic_data()->logic_segments();
737
738         if (!segments.empty()) {
739                 if (segment_display_mode_ == ShowLastSegmentOnly)
740                         segment = segments.back();
741
742                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
743                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
744                         try {
745                                 segment = segments.at(current_segment_);
746                         } catch (out_of_range&) {
747                                 qDebug() << "Current logic segment out of range for signal" << base_->name() << ":" << current_segment_;
748                         }
749                 }
750         }
751
752         return segment;
753 }
754
755 float AnalogSignal::get_resolution(int scale_index)
756 {
757         const float seq[] = {1.0f, 2.0f, 5.0f};
758
759         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
760         const div_t d = div((int)(scale_index + countof(seq) * offset),
761                 countof(seq));
762
763         return powf(10.0f, d.quot - offset) * seq[d.rem];
764 }
765
766 void AnalogSignal::update_scale()
767 {
768         resolution_ = get_resolution(scale_index_);
769         scale_ = div_height_ / resolution_;
770 }
771
772 void AnalogSignal::update_conversion_widgets()
773 {
774         SignalBase::ConversionType conv_type = base_->get_conversion_type();
775
776         // Enable or disable widgets depending on conversion state
777         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
778         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
779
780         conv_threshold_cb_->clear();
781
782         vector < pair<QString, int> > presets = base_->get_conversion_presets();
783
784         // Prevent the combo box from firing the "edit text changed" signal
785         // as that would involuntarily select the first entry
786         conv_threshold_cb_->blockSignals(true);
787
788         // Set available options depending on chosen conversion
789         for (pair<QString, int>& preset : presets)
790                 conv_threshold_cb_->addItem(preset.first, preset.second);
791
792         map < QString, QVariant > options = base_->get_conversion_options();
793
794         if (conv_type == SignalBase::A2LConversionByThreshold) {
795                 const vector<double> thresholds = base_->get_conversion_thresholds(
796                                 SignalBase::A2LConversionByThreshold, true);
797                 conv_threshold_cb_->addItem(
798                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
799         }
800
801         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
802                 const vector<double> thresholds = base_->get_conversion_thresholds(
803                                 SignalBase::A2LConversionBySchmittTrigger, true);
804                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
805                                 QString::number(thresholds[0], 'f', 1),
806                                 QString::number(thresholds[1], 'f', 1)), -1);
807         }
808
809         int preset_id = base_->get_current_conversion_preset();
810         conv_threshold_cb_->setCurrentIndex(
811                         conv_threshold_cb_->findData(preset_id));
812
813         conv_threshold_cb_->blockSignals(false);
814 }
815
816 vector<data::LogicSegment::EdgePair> AnalogSignal::get_nearest_level_changes(uint64_t sample_pos)
817 {
818         assert(base_);
819         assert(owner_);
820
821         // Return if there's no logic data or we're showing only the analog trace
822         if (!base_->logic_data() || (display_type_ == DisplayAnalog))
823                 return vector<data::LogicSegment::EdgePair>();
824
825         if (sample_pos == 0)
826                 return vector<LogicSegment::EdgePair>();
827
828         shared_ptr<LogicSegment> segment = get_logic_segment_to_paint();
829         if (!segment || (segment->get_sample_count() == 0))
830                 return vector<LogicSegment::EdgePair>();
831
832         const View *view = owner_->view();
833         assert(view);
834         const double samples_per_pixel = base_->get_samplerate() * view->scale();
835
836         vector<LogicSegment::EdgePair> edges;
837
838         segment->get_surrounding_edges(edges, sample_pos,
839                 samples_per_pixel / LogicSignal::Oversampling, 0);
840
841         if (edges.empty())
842                 return vector<LogicSegment::EdgePair>();
843
844         return edges;
845 }
846
847 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
848 {
849         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
850                 base_->analog_data()->analog_segments();
851
852         if (segments.empty())
853                 return;
854
855         double signal_min_ = 0, signal_max_ = 0;
856         double min = 0, max = 0;
857
858         for (const shared_ptr<pv::data::AnalogSegment>& segment : segments) {
859                 pair<double, double> mm = segment->get_min_max();
860                 min = std::min(min, mm.first);
861                 max = std::max(max, mm.second);
862         }
863
864         if ((min == signal_min_) && (max == signal_max_) && !force_update)
865                 return;
866
867         signal_min_ = min;
868         signal_max_ = max;
869
870         // If we're allowed to alter the div assignment...
871         if (!keep_divs) {
872                 // Use all divs for the positive range if there are no negative values
873                 if ((min == 0) && (neg_vdivs_ > 0)) {
874                         pos_vdivs_ += neg_vdivs_;
875                         neg_vdivs_ = 0;
876                 }
877
878                 // Split up the divs if there are negative values but no negative divs
879                 if ((min < 0) && (neg_vdivs_ == 0)) {
880                         neg_vdivs_ = pos_vdivs_ / 2;
881                         pos_vdivs_ -= neg_vdivs_;
882                 }
883         }
884
885         // If there is still no positive div when we need it, add one
886         // (this can happen when pos_vdivs==neg_vdivs==0)
887         if ((max > 0) && (pos_vdivs_ == 0)) {
888                 pos_vdivs_ = 1;
889                 owner_->extents_changed(false, true);
890         }
891
892         // If there is still no negative div when we need it, add one
893         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
894         if ((min < 0) && (neg_vdivs_ == 0)) {
895                 neg_vdivs_ = 1;
896                 owner_->extents_changed(false, true);
897         }
898
899         double min_value_per_div;
900         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
901                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
902         else if (pos_vdivs_ > 0)
903                 min_value_per_div = max / pos_vdivs_;
904         else
905                 min_value_per_div = -min / neg_vdivs_;
906
907         // Find first scale value that is bigger than the value we need
908         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
909                 if (get_resolution(i) > min_value_per_div) {
910                         scale_index_ = i;
911                         break;
912                 }
913
914         update_scale();
915 }
916
917 void AnalogSignal::reset_pixel_values()
918 {
919         value_at_pixel_pos_.clear();
920         current_pixel_pos_ = -1;
921         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
922 }
923
924 void AnalogSignal::process_next_sample_value(float x, float value)
925 {
926         // Note: NAN is used to indicate the non-existance of a value at this pixel
927
928         if (std::isnan(prev_value_at_pixel_)) {
929                 if (x < 0) {
930                         min_value_at_pixel_ = value;
931                         max_value_at_pixel_ = value;
932                         prev_value_at_pixel_ = value;
933                         current_pixel_pos_ = x;
934                 } else
935                         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
936         }
937
938         const int pixel_pos = (int)(x + 0.5);
939
940         if (pixel_pos > current_pixel_pos_) {
941                 if (pixel_pos - current_pixel_pos_ == 1) {
942                         if (std::isnan(prev_value_at_pixel_)) {
943                                 value_at_pixel_pos_.push_back(prev_value_at_pixel_);
944                         } else {
945                                 // Average the min/max range to create one value for the previous pixel
946                                 const float avg = (min_value_at_pixel_ + max_value_at_pixel_) / 2;
947                                 value_at_pixel_pos_.push_back(avg);
948                         }
949                 } else {
950                         // Interpolate values to create values for the intermediate pixels
951                         const float start_value = prev_value_at_pixel_;
952                         const float end_value = value;
953                         const int steps = fabs(pixel_pos - current_pixel_pos_);
954                         const double gradient = (end_value - start_value) / steps;
955                         for (int i = 0; i < steps; i++) {
956                                 if (current_pixel_pos_ + i < 0)
957                                         continue;
958                                 value_at_pixel_pos_.push_back(start_value + i * gradient);
959                         }
960                 }
961
962                 min_value_at_pixel_ = value;
963                 max_value_at_pixel_ = value;
964                 prev_value_at_pixel_ = value;
965                 current_pixel_pos_ = pixel_pos;
966         } else {
967                 // Another sample for the same pixel
968                 if (value < min_value_at_pixel_)
969                         min_value_at_pixel_ = value;
970                 if (value > max_value_at_pixel_)
971                         max_value_at_pixel_ = value;
972         }
973 }
974
975 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
976 {
977         // Add the standard options
978         Signal::populate_popup_form(parent, form);
979
980         QFormLayout *const layout = new QFormLayout;
981
982         // Add div-related settings
983         pvdiv_sb_ = new QSpinBox(parent);
984         pvdiv_sb_->setRange(0, MaximumVDivs);
985         pvdiv_sb_->setValue(pos_vdivs_);
986         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
987                 this, SLOT(on_pos_vdivs_changed(int)));
988         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
989
990         nvdiv_sb_ = new QSpinBox(parent);
991         nvdiv_sb_->setRange(0, MaximumVDivs);
992         nvdiv_sb_->setValue(neg_vdivs_);
993         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
994                 this, SLOT(on_neg_vdivs_changed(int)));
995         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
996
997         div_height_sb_ = new QSpinBox(parent);
998         div_height_sb_->setRange(20, 1000);
999         div_height_sb_->setSingleStep(5);
1000         div_height_sb_->setSuffix(tr(" pixels"));
1001         div_height_sb_->setValue(div_height_);
1002         connect(div_height_sb_, SIGNAL(valueChanged(int)),
1003                 this, SLOT(on_div_height_changed(int)));
1004         layout->addRow(tr("Div height"), div_height_sb_);
1005
1006         // Add the vertical resolution
1007         resolution_cb_ = new QComboBox(parent);
1008
1009         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
1010                 const QString label = QString("%1").arg(get_resolution(i));
1011                 resolution_cb_->insertItem(0, label, QVariant(i));
1012         }
1013
1014         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
1015         resolution_cb_->setCurrentIndex(cur_idx);
1016
1017         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
1018                 this, SLOT(on_resolution_changed(int)));
1019
1020         QGridLayout *const vdiv_layout = new QGridLayout;
1021         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
1022         vdiv_layout->addWidget(resolution_cb_, 0, 0);
1023         vdiv_layout->addWidget(vdiv_unit, 0, 1);
1024
1025         layout->addRow(tr("Vertical resolution"), vdiv_layout);
1026
1027         // Add the autoranging checkbox
1028         QCheckBox* autoranging_cb = new QCheckBox();
1029         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
1030
1031         connect(autoranging_cb, SIGNAL(stateChanged(int)),
1032                 this, SLOT(on_autoranging_changed(int)));
1033
1034         layout->addRow(tr("Autoranging"), autoranging_cb);
1035
1036         // Add the conversion type dropdown
1037         conversion_cb_ = new QComboBox();
1038
1039         conversion_cb_->addItem(tr("none"),
1040                 SignalBase::NoConversion);
1041         conversion_cb_->addItem(tr("to logic via threshold"),
1042                 SignalBase::A2LConversionByThreshold);
1043         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
1044                 SignalBase::A2LConversionBySchmittTrigger);
1045
1046         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
1047         conversion_cb_->setCurrentIndex(cur_idx);
1048
1049         layout->addRow(tr("Conversion"), conversion_cb_);
1050
1051         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
1052                 this, SLOT(on_conversion_changed(int)));
1053
1054     // Add the conversion threshold settings
1055     conv_threshold_cb_ = new QComboBox();
1056     conv_threshold_cb_->setEditable(true);
1057
1058     layout->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
1059
1060     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
1061             this, SLOT(on_conv_threshold_changed(int)));
1062     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString&)),
1063             this, SLOT(on_conv_threshold_changed()));  // index will be -1
1064
1065         // Add the display type dropdown
1066         display_type_cb_ = new QComboBox();
1067
1068         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
1069         display_type_cb_->addItem(tr("converted"), DisplayConverted);
1070         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
1071
1072         cur_idx = display_type_cb_->findData(QVariant(display_type_));
1073         display_type_cb_->setCurrentIndex(cur_idx);
1074
1075         layout->addRow(tr("Show traces for"), display_type_cb_);
1076
1077         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
1078                 this, SLOT(on_display_type_changed(int)));
1079
1080         // Update the conversion widget contents and states
1081         update_conversion_widgets();
1082
1083         form->addRow(layout);
1084 }
1085
1086 void AnalogSignal::hover_point_changed(const QPoint &hp)
1087 {
1088         Signal::hover_point_changed(hp);
1089
1090         // Note: Even though the view area begins at 0, we exclude 0 because
1091         // that's also the value given when the cursor is over the header to the
1092         // left of the trace paint area
1093         if (hp.x() <= 0) {
1094                 value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
1095         } else {
1096                 if ((size_t)hp.x() < value_at_pixel_pos_.size())
1097                         value_at_hover_pos_ = value_at_pixel_pos_.at(hp.x());
1098                 else
1099                         value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
1100         }
1101 }
1102
1103 void AnalogSignal::on_setting_changed(const QString &key, const QVariant &value)
1104 {
1105         Signal::on_setting_changed(key, value);
1106
1107         if (key == GlobalSettings::Key_View_ShowSamplingPoints)
1108                 show_sampling_points_ = value.toBool();
1109
1110         if (key == GlobalSettings::Key_View_FillSignalHighAreas)
1111                 fill_high_areas_ = value.toBool();
1112
1113         if (key == GlobalSettings::Key_View_FillSignalHighAreaColor)
1114                 high_fill_color_ = QColor::fromRgba(value.value<uint32_t>());
1115
1116         if (key == GlobalSettings::Key_View_ShowAnalogMinorGrid)
1117                 show_analog_minor_grid_ = value.toBool();
1118
1119         if (key == GlobalSettings::Key_View_ConversionThresholdDispMode) {
1120                 conversion_threshold_disp_mode_ = value.toInt();
1121
1122                 if (owner_)
1123                         owner_->row_item_appearance_changed(false, true);
1124         }
1125 }
1126
1127 void AnalogSignal::on_min_max_changed(float min, float max)
1128 {
1129         (void)min;
1130         (void)max;
1131
1132         if (autoranging_)
1133                 perform_autoranging(false, false);
1134 }
1135
1136 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
1137 {
1138         if (vdivs == pos_vdivs_)
1139                 return;
1140
1141         pos_vdivs_ = vdivs;
1142
1143         // There has to be at least one div, positive or negative
1144         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
1145                 pos_vdivs_ = 1;
1146                 if (pvdiv_sb_)
1147                         pvdiv_sb_->setValue(pos_vdivs_);
1148         }
1149
1150         if (autoranging_) {
1151                 perform_autoranging(true, true);
1152
1153                 // It could be that a positive or negative div was added, so update
1154                 if (pvdiv_sb_) {
1155                         pvdiv_sb_->setValue(pos_vdivs_);
1156                         nvdiv_sb_->setValue(neg_vdivs_);
1157                 }
1158         }
1159
1160         if (owner_) {
1161                 // Call order is important, otherwise the lazy event handler won't work
1162                 owner_->extents_changed(false, true);
1163                 owner_->row_item_appearance_changed(false, true);
1164         }
1165 }
1166
1167 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
1168 {
1169         if (vdivs == neg_vdivs_)
1170                 return;
1171
1172         neg_vdivs_ = vdivs;
1173
1174         // There has to be at least one div, positive or negative
1175         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
1176                 pos_vdivs_ = 1;
1177                 if (pvdiv_sb_)
1178                         pvdiv_sb_->setValue(pos_vdivs_);
1179         }
1180
1181         if (autoranging_) {
1182                 perform_autoranging(true, true);
1183
1184                 // It could be that a positive or negative div was added, so update
1185                 if (pvdiv_sb_) {
1186                         pvdiv_sb_->setValue(pos_vdivs_);
1187                         nvdiv_sb_->setValue(neg_vdivs_);
1188                 }
1189         }
1190
1191         if (owner_) {
1192                 // Call order is important, otherwise the lazy event handler won't work
1193                 owner_->extents_changed(false, true);
1194                 owner_->row_item_appearance_changed(false, true);
1195         }
1196 }
1197
1198 void AnalogSignal::on_div_height_changed(int height)
1199 {
1200         div_height_ = height;
1201         update_scale();
1202
1203         if (owner_) {
1204                 // Call order is important, otherwise the lazy event handler won't work
1205                 owner_->extents_changed(false, true);
1206                 owner_->row_item_appearance_changed(false, true);
1207         }
1208 }
1209
1210 void AnalogSignal::on_resolution_changed(int index)
1211 {
1212         scale_index_ = resolution_cb_->itemData(index).toInt();
1213         update_scale();
1214
1215         if (owner_)
1216                 owner_->row_item_appearance_changed(false, true);
1217 }
1218
1219 void AnalogSignal::on_autoranging_changed(int state)
1220 {
1221         autoranging_ = (state == Qt::Checked);
1222
1223         if (autoranging_)
1224                 perform_autoranging(false, true);
1225
1226         if (owner_) {
1227                 // Call order is important, otherwise the lazy event handler won't work
1228                 owner_->extents_changed(false, true);
1229                 owner_->row_item_appearance_changed(false, true);
1230         }
1231 }
1232
1233 void AnalogSignal::on_conversion_changed(int index)
1234 {
1235         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
1236
1237         SignalBase::ConversionType conv_type =
1238                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
1239
1240         if (conv_type != old_conv_type) {
1241                 base_->set_conversion_type(conv_type);
1242                 update_conversion_widgets();
1243
1244                 if (owner_)
1245                         owner_->row_item_appearance_changed(false, true);
1246         }
1247 }
1248
1249 void AnalogSignal::on_conv_threshold_changed(int index)
1250 {
1251         SignalBase::ConversionType conv_type = base_->get_conversion_type();
1252
1253         // Note: index is set to -1 if the text in the combo box matches none of
1254         // the entries in the combo box
1255
1256         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
1257                 return;
1258
1259         // The combo box entry with the custom value has user_data set to -1
1260         const int user_data = conv_threshold_cb_->findText(
1261                         conv_threshold_cb_->currentText());
1262
1263         const bool use_custom_thr = (index == -1) || (user_data == -1);
1264
1265         if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
1266                 // Not one of the preset values, try to parse the combo box text
1267                 // Note: Regex loosely based on
1268                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
1269                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1270                 QString re2 = "([a-zA-Z]*)"; // SI unit
1271                 QRegExp regex(re1 + re2);
1272
1273                 const QString text = conv_threshold_cb_->currentText();
1274                 if (!regex.exactMatch(text))
1275                         return;  // String doesn't match the regex
1276
1277                 QStringList tokens = regex.capturedTexts();
1278
1279                 // For now, we simply assume that the unit is volt without modifiers
1280                 const double thr = tokens.at(1).toDouble();
1281
1282                 // Only restart the conversion if the threshold was updated.
1283                 // We're starting a delayed conversion because the user may still be
1284                 // typing and the UI would lag if we kept on restarting it immediately
1285                 if (base_->set_conversion_option("threshold_value", thr))
1286                         base_->start_conversion(true);
1287         }
1288
1289         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
1290                 // Not one of the preset values, try to parse the combo box text
1291                 // Note: Regex loosely based on
1292                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
1293                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1294                 QString re2 = "([a-zA-Z]*)"; // SI unit
1295                 QString re3 = "\\/"; // Forward slash, not captured
1296                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1297                 QString re5 = "([a-zA-Z]*)"; // SI unit
1298                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
1299
1300                 const QString text = conv_threshold_cb_->currentText();
1301                 if (!regex.exactMatch(text))
1302                         return;  // String doesn't match the regex
1303
1304                 QStringList tokens = regex.capturedTexts();
1305
1306                 // For now, we simply assume that the unit is volt without modifiers
1307                 const double low_thr = tokens.at(1).toDouble();
1308                 const double high_thr = tokens.at(3).toDouble();
1309
1310                 // Only restart the conversion if one of the options was updated.
1311                 // We're starting a delayed conversion because the user may still be
1312                 // typing and the UI would lag if we kept on restarting it immediately
1313                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1314                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1315                 if (o1 || o2)
1316                         base_->start_conversion(true);  // Start delayed conversion
1317         }
1318
1319         base_->set_conversion_preset((SignalBase::ConversionPreset)index);
1320
1321         // Immediately start the conversion if we're not using custom values
1322         // (i.e. we're using one of the presets)
1323         if (!use_custom_thr)
1324                 base_->start_conversion();
1325 }
1326
1327 void AnalogSignal::on_delayed_conversion_starter()
1328 {
1329         base_->start_conversion();
1330 }
1331
1332 void AnalogSignal::on_display_type_changed(int index)
1333 {
1334         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1335
1336         if (owner_)
1337                 owner_->row_item_appearance_changed(false, true);
1338 }
1339
1340 } // namespace trace
1341 } // namespace views
1342 } // namespace pv