Implement MathSignal
[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 using pv::util::determine_value_prefix;
69
70 namespace pv {
71 namespace views {
72 namespace trace {
73
74 const QColor AnalogSignal::SignalColors[4] = {
75         QColor(0xC4, 0xA0, 0x00),       // Yellow
76         QColor(0x87, 0x20, 0x7A),       // Magenta
77         QColor(0x20, 0x4A, 0x87),       // Blue
78         QColor(0x4E, 0x9A, 0x06)        // Green
79 };
80
81 const QPen AnalogSignal::AxisPen(QColor(0, 0, 0, 30 * 256 / 100), 2);
82 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
83 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
84
85 const QColor AnalogSignal::SamplingPointColor(0x77, 0x77, 0x77);
86 const QColor AnalogSignal::SamplingPointColorLo = QColor(200, 0, 0, 80 * 256 / 100);
87 const QColor AnalogSignal::SamplingPointColorNe = QColor(0,   0, 0, 80 * 256 / 100);
88 const QColor AnalogSignal::SamplingPointColorHi = QColor(0, 200, 0, 80 * 256 / 100);
89
90 const QColor AnalogSignal::ThresholdColor = QColor(0, 0, 0, 30 * 256 / 100);
91 const QColor AnalogSignal::ThresholdColorLo = QColor(255, 0, 0, 8 * 256 / 100);
92 const QColor AnalogSignal::ThresholdColorNe = QColor(0,   0, 0, 10 * 256 / 100);
93 const QColor AnalogSignal::ThresholdColorHi = QColor(0, 255, 0, 8 * 256 / 100);
94
95 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
96 const float AnalogSignal::EnvelopeThreshold = 64.0f;
97
98 const int AnalogSignal::MaximumVDivs = 10;
99 const int AnalogSignal::MinScaleIndex = -6;  // 0.01 units/div
100 const int AnalogSignal::MaxScaleIndex = 10;  // 1000 units/div
101
102 const int AnalogSignal::InfoTextMarginRight = 20;
103 const int AnalogSignal::InfoTextMarginBottom = 5;
104
105 AnalogSignal::AnalogSignal(
106         pv::Session &session,
107         shared_ptr<data::SignalBase> base) :
108         Signal(session, base),
109         value_at_hover_pos_(std::numeric_limits<float>::quiet_NaN()),
110         scale_index_(4), // 20 per div
111         pos_vdivs_(1),
112         neg_vdivs_(1),
113         resolution_(0),
114         display_type_(DisplayBoth),
115         autoranging_(true)
116 {
117         axis_pen_ = AxisPen;
118
119         pv::data::Analog* analog_data =
120                 dynamic_cast<pv::data::Analog*>(data().get());
121
122         connect(analog_data, SIGNAL(min_max_changed(float, float)),
123                 this, SLOT(on_min_max_changed(float, float)));
124
125         GlobalSettings settings;
126         show_sampling_points_ =
127                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
128         fill_high_areas_ =
129                 settings.value(GlobalSettings::Key_View_FillSignalHighAreas).toBool();
130         high_fill_color_ = QColor::fromRgba(settings.value(
131                 GlobalSettings::Key_View_FillSignalHighAreaColor).value<uint32_t>());
132         show_analog_minor_grid_ =
133                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
134         conversion_threshold_disp_mode_ =
135                 settings.value(GlobalSettings::Key_View_ConversionThresholdDispMode).toInt();
136         div_height_ = settings.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
137
138         base_->set_color(SignalColors[base_->index() % countof(SignalColors)]);
139         update_scale();
140 }
141
142 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
143 {
144         return base_->analog_data();
145 }
146
147 std::map<QString, QVariant> AnalogSignal::save_settings() const
148 {
149         std::map<QString, QVariant> result;
150
151         result["pos_vdivs"] = pos_vdivs_;
152         result["neg_vdivs"] = neg_vdivs_;
153         result["scale_index"] = scale_index_;
154         result["display_type"] = display_type_;
155         result["autoranging"] = pos_vdivs_;
156         result["div_height"] = div_height_;
157
158         return result;
159 }
160
161 void AnalogSignal::restore_settings(std::map<QString, QVariant> settings)
162 {
163         auto entry = settings.find("pos_vdivs");
164         if (entry != settings.end())
165                 pos_vdivs_ = settings["pos_vdivs"].toInt();
166
167         entry = settings.find("neg_vdivs");
168         if (entry != settings.end())
169                 neg_vdivs_ = settings["neg_vdivs"].toInt();
170
171         entry = settings.find("scale_index");
172         if (entry != settings.end()) {
173                 scale_index_ = settings["scale_index"].toInt();
174                 update_scale();
175         }
176
177         entry = settings.find("display_type");
178         if (entry != settings.end())
179                 display_type_ = (DisplayType)(settings["display_type"].toInt());
180
181         entry = settings.find("autoranging");
182         if (entry != settings.end())
183                 autoranging_ = settings["autoranging"].toBool();
184
185         entry = settings.find("div_height");
186         if (entry != settings.end()) {
187                 const int old_height = div_height_;
188                 div_height_ = settings["div_height"].toInt();
189
190                 if ((div_height_ != old_height) && owner_) {
191                         // Call order is important, otherwise the lazy event handler won't work
192                         owner_->extents_changed(false, true);
193                         owner_->row_item_appearance_changed(false, true);
194                 }
195         }
196 }
197
198 pair<int, int> AnalogSignal::v_extents() const
199 {
200         const int ph = pos_vdivs_ * div_height_;
201         const int nh = neg_vdivs_ * div_height_;
202         return make_pair(-ph, nh);
203 }
204
205 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
206 {
207         if (!base_->enabled())
208                 return;
209
210         bool paint_thr_bg =
211                 conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Background;
212
213         const vector<double> thresholds = base_->get_conversion_thresholds();
214
215         // Only display thresholds if we have some and we show analog samples
216         if ((thresholds.size() > 0) && paint_thr_bg &&
217                 ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))) {
218
219                 const int visual_y = get_visual_y();
220                 const pair<int, int> extents = v_extents();
221                 const int top = visual_y + extents.first;
222                 const int btm = visual_y + extents.second;
223
224                 // Draw high/neutral/low areas
225                 if (thresholds.size() == 2) {
226                         int thr_lo = visual_y - thresholds[0] * scale_;
227                         int thr_hi = visual_y - thresholds[1] * scale_;
228                         thr_lo = min(max(thr_lo, top), btm);
229                         thr_hi = min(max(thr_hi, top), btm);
230
231                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr_hi - top),
232                                 QBrush(ThresholdColorHi));
233                         p.fillRect(QRectF(pp.left(), thr_hi, pp.width(), thr_lo - thr_hi),
234                                 QBrush(ThresholdColorNe));
235                         p.fillRect(QRectF(pp.left(), thr_lo, pp.width(), btm - thr_lo),
236                                 QBrush(ThresholdColorLo));
237                 } else {
238                         int thr = visual_y - thresholds[0] * scale_;
239                         thr = min(max(thr, top), btm);
240
241                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr - top),
242                                 QBrush(ThresholdColorHi));
243                         p.fillRect(QRectF(pp.left(), thr, pp.width(), btm - thr),
244                                 QBrush(ThresholdColorLo));
245                 }
246
247                 paint_axis(p, pp, get_visual_y());
248         } else {
249                 Signal::paint_back(p, pp);
250                 paint_axis(p, pp, get_visual_y());
251         }
252 }
253
254 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
255 {
256         assert(base_->analog_data());
257         assert(owner_);
258
259         const int y = get_visual_y();
260
261         if (!base_->enabled())
262                 return;
263
264         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
265                 paint_grid(p, y, pp.left(), pp.right());
266
267                 shared_ptr<pv::data::AnalogSegment> segment = get_analog_segment_to_paint();
268                 if (!segment || (segment->get_sample_count() == 0))
269                         return;
270
271                 const double pixels_offset = pp.pixels_offset();
272                 const double samplerate = max(1.0, segment->samplerate());
273                 const pv::util::Timestamp& start_time = segment->start_time();
274                 const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
275                 const double samples_per_pixel = samplerate * pp.scale();
276                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
277                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
278
279                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
280                         (int64_t)0), last_sample);
281                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
282                         (int64_t)0), last_sample);
283
284                 if (samples_per_pixel < EnvelopeThreshold)
285                         paint_trace(p, segment, y, pp.left(), start_sample, end_sample,
286                                 pixels_offset, samples_per_pixel);
287                 else
288                         paint_envelope(p, segment, y, pp.left(), start_sample, end_sample,
289                                 pixels_offset, samples_per_pixel);
290         }
291
292         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
293                 paint_logic_mid(p, pp);
294 }
295
296 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
297 {
298         if (!enabled())
299                 return;
300
301         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
302                 const int y = get_visual_y();
303
304                 QString infotext;
305
306                 SIPrefix prefix;
307                 if (fabs(signal_max_) > fabs(signal_min_))
308                         prefix = determine_value_prefix(fabs(signal_max_));
309                 else
310                         prefix = determine_value_prefix(fabs(signal_min_));
311
312                 // Show the info section on the right side of the trace, including
313                 // the value at the hover point when the hover marker is enabled
314                 // and we have corresponding data available
315                 if (show_hover_marker_ && !std::isnan(value_at_hover_pos_)) {
316                         infotext = QString("[%1] %2 V/div")
317                                 .arg(format_value_si(value_at_hover_pos_, prefix, 3, "V", false))
318                                 .arg(resolution_);
319                 } else
320                         infotext = QString("%1 V/div").arg(resolution_);
321
322                 p.setPen(base_->color());
323                 p.setFont(QApplication::font());
324
325                 const QRectF bounding_rect = QRectF(pp.left(),
326                                 y + v_extents().first,
327                                 pp.width() - InfoTextMarginRight,
328                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
329
330                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
331         }
332
333         if (show_hover_marker_)
334                 paint_hover_marker(p);
335 }
336
337 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
338 {
339         bool was_antialiased = p.testRenderHint(QPainter::Antialiasing);
340         p.setRenderHint(QPainter::Antialiasing, false);
341
342         if (pos_vdivs_ > 0) {
343                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
344                 for (int i = 1; i <= pos_vdivs_; i++) {
345                         const float dy = i * div_height_;
346                         p.drawLine(QLineF(left, y - dy, right, y - dy));
347                 }
348         }
349
350         if ((pos_vdivs_ > 0) && show_analog_minor_grid_) {
351                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
352                 for (int i = 0; i < pos_vdivs_; i++) {
353                         const float dy = i * div_height_;
354                         const float dy25 = dy + (0.25 * div_height_);
355                         const float dy50 = dy + (0.50 * div_height_);
356                         const float dy75 = dy + (0.75 * div_height_);
357                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
358                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
359                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
360                 }
361         }
362
363         if (neg_vdivs_ > 0) {
364                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
365                 for (int i = 1; i <= neg_vdivs_; i++) {
366                         const float dy = i * div_height_;
367                         p.drawLine(QLineF(left, y + dy, right, y + dy));
368                 }
369         }
370
371         if ((pos_vdivs_ > 0) && show_analog_minor_grid_) {
372                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
373                 for (int i = 0; i < neg_vdivs_; i++) {
374                         const float dy = i * div_height_;
375                         const float dy25 = dy + (0.25 * div_height_);
376                         const float dy50 = dy + (0.50 * div_height_);
377                         const float dy75 = dy + (0.75 * div_height_);
378                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
379                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
380                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
381                 }
382         }
383
384         p.setRenderHint(QPainter::Antialiasing, was_antialiased);
385 }
386
387 void AnalogSignal::paint_trace(QPainter &p,
388         const shared_ptr<pv::data::AnalogSegment> &segment,
389         int y, int left, const int64_t start, const int64_t end,
390         const double pixels_offset, const double samples_per_pixel)
391 {
392         if (end <= start)
393                 return;
394
395         bool paint_thr_dots =
396                 (base_->get_conversion_type() != data::SignalBase::NoConversion) &&
397                 (conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Dots);
398
399         vector<double> thresholds;
400         if (paint_thr_dots)
401                 thresholds = base_->get_conversion_thresholds();
402
403         // Calculate and paint the sampling points if enabled and useful
404         GlobalSettings settings;
405         const bool show_sampling_points =
406                 (show_sampling_points_ || paint_thr_dots) && (samples_per_pixel < 0.25);
407
408         p.setPen(base_->color());
409
410         const int64_t points_count = end - start + 1;
411
412         QPointF *points = new QPointF[points_count];
413         QPointF *point = points;
414
415         vector<QRectF> sampling_points[3];
416
417         int64_t sample_count = min(points_count, TracePaintBlockSize);
418         int64_t block_sample = 0;
419         float *sample_block = new float[TracePaintBlockSize];
420         segment->get_samples(start, start + sample_count, sample_block);
421
422         if (show_hover_marker_)
423                 reset_pixel_values();
424
425         const int w = 2;
426         for (int64_t sample = start; sample <= end; sample++, block_sample++) {
427
428                 // Fetch next block of samples if we finished the current one
429                 if (block_sample == TracePaintBlockSize) {
430                         block_sample = 0;
431                         sample_count = min(points_count - sample, TracePaintBlockSize);
432                         segment->get_samples(sample, sample + sample_count, sample_block);
433                 }
434
435                 const float abs_x = sample / samples_per_pixel - pixels_offset;
436                 const float x = left + abs_x;
437
438                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
439
440                 // Generate the pixel<->value lookup table for the mouse hover
441                 if (show_hover_marker_)
442                         process_next_sample_value(abs_x, sample_block[block_sample]);
443
444                 // Create the sampling points if needed
445                 if (show_sampling_points) {
446                         int idx = 0;  // Neutral
447
448                         if (paint_thr_dots) {
449                                 if (thresholds.size() == 1)
450                                         idx = (sample_block[block_sample] >= thresholds[0]) ? 2 : 1;
451                                 else if (thresholds.size() == 2) {
452                                         if (sample_block[block_sample] > thresholds[1])
453                                                 idx = 2;  // High
454                                         else if (sample_block[block_sample] < thresholds[0])
455                                                 idx = 1;  // Low
456                                 }
457                         }
458
459                         sampling_points[idx].emplace_back(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
460                 }
461         }
462         delete[] sample_block;
463
464         // QPainter::drawPolyline() is slow, let's paint the lines ourselves
465         for (int64_t i = 1; i < points_count; i++)
466                 p.drawLine(points[i - 1], points[i]);
467
468         if (show_sampling_points) {
469                 if (paint_thr_dots) {
470                         p.setPen(SamplingPointColorNe);
471                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
472                         p.setPen(SamplingPointColorLo);
473                         p.drawRects(sampling_points[1].data(), sampling_points[1].size());
474                         p.setPen(SamplingPointColorHi);
475                         p.drawRects(sampling_points[2].data(), sampling_points[2].size());
476                 } else {
477                         p.setPen(SamplingPointColor);
478                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
479                 }
480         }
481
482         delete[] points;
483 }
484
485 void AnalogSignal::paint_envelope(QPainter &p,
486         const shared_ptr<pv::data::AnalogSegment> &segment,
487         int y, int left, const int64_t start, const int64_t end,
488         const double pixels_offset, const double samples_per_pixel)
489 {
490         using pv::data::AnalogSegment;
491
492         // Note: Envelope painting currently doesn't generate a pixel<->value lookup table
493         if (show_hover_marker_)
494                 reset_pixel_values();
495
496         AnalogSegment::EnvelopeSection e;
497         segment->get_envelope_section(e, start, end, samples_per_pixel);
498
499         if (e.length < 2)
500                 return;
501
502         p.setPen(QPen(Qt::NoPen));
503         p.setBrush(base_->color());
504
505         QRectF *const rects = new QRectF[e.length];
506         QRectF *rect = rects;
507
508         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
509                 const float x = ((e.scale * sample + e.start) /
510                         samples_per_pixel - pixels_offset) + left;
511
512                 const AnalogSegment::EnvelopeSample *const s = e.samples + sample;
513
514                 // We overlap this sample with the next so that vertical
515                 // gaps do not appear during steep rising or falling edges
516                 const float b = y - max(s->max, (s + 1)->min) * scale_;
517                 const float t = y - min(s->min, (s + 1)->max) * scale_;
518
519                 float h = b - t;
520                 if (h >= 0.0f && h <= 1.0f)
521                         h = 1.0f;
522                 if (h <= 0.0f && h >= -1.0f)
523                         h = -1.0f;
524
525                 *rect++ = QRectF(x, t, 1.0f, h);
526         }
527
528         p.drawRects(rects, e.length);
529
530         delete[] rects;
531         delete[] e.samples;
532 }
533
534 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
535 {
536         QLineF *line;
537
538         vector< pair<int64_t, bool> > edges;
539
540         assert(base_);
541
542         const int y = get_visual_y();
543
544         if (!base_->enabled() || !base_->logic_data())
545                 return;
546
547         const int signal_margin =
548                 QFontMetrics(QApplication::font()).height() / 2;
549
550         const int ph = min(pos_vdivs_, 1) * div_height_;
551         const int nh = min(neg_vdivs_, 1) * div_height_;
552         const float high_offset = y - ph + signal_margin + 0.5f;
553         const float low_offset = y + nh - signal_margin - 0.5f;
554         const float signal_height = low_offset - high_offset;
555
556         shared_ptr<pv::data::LogicSegment> segment = get_logic_segment_to_paint();
557         if (!segment || (segment->get_sample_count() == 0))
558                 return;
559
560         double samplerate = segment->samplerate();
561
562         // Show sample rate as 1Hz when it is unknown
563         if (samplerate == 0.0)
564                 samplerate = 1.0;
565
566         const double pixels_offset = pp.pixels_offset();
567         const pv::util::Timestamp& start_time = segment->start_time();
568         const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
569         const double samples_per_pixel = samplerate * pp.scale();
570         const double pixels_per_sample = 1 / samples_per_pixel;
571         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
572         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
573
574         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
575                 (int64_t)0), last_sample);
576         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
577                 (int64_t)0), last_sample);
578
579         segment->get_subsampled_edges(edges, start_sample, end_sample,
580                 samples_per_pixel / LogicSignal::Oversampling, 0);
581         assert(edges.size() >= 2);
582
583         const float first_sample_x =
584                 pp.left() + (edges.front().first / samples_per_pixel - pixels_offset);
585         const float last_sample_x =
586                 pp.left() + (edges.back().first / samples_per_pixel - pixels_offset);
587
588         // Check whether we need to paint the sampling points
589         const bool show_sampling_points = show_sampling_points_ && (samples_per_pixel < 0.25);
590         vector<QRectF> sampling_points;
591         float sampling_point_x = first_sample_x;
592         int64_t sampling_point_sample = start_sample;
593         const int w = 2;
594
595         if (show_sampling_points)
596                 sampling_points.reserve(end_sample - start_sample + 1);
597
598         vector<QRectF> high_rects;
599         float rising_edge_x;
600         bool rising_edge_seen = false;
601
602         // Paint the edges
603         const unsigned int edge_count = edges.size() - 2;
604         QLineF *const edge_lines = new QLineF[edge_count];
605         line = edge_lines;
606
607         if (edges.front().second) {
608                 // Beginning of trace is high
609                 rising_edge_x = first_sample_x;
610                 rising_edge_seen = true;
611         }
612
613         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
614                 // Note: multiple edges occupying a single pixel are represented by an edge
615                 // with undefined logic level. This means that only the first falling edge
616                 // after a rising edge corresponds to said rising edge - and vice versa. If
617                 // more edges with the same logic level follow, they denote multiple edges.
618
619                 const float x = pp.left() + ((*i).first / samples_per_pixel - pixels_offset);
620                 *line++ = QLineF(x, high_offset, x, low_offset);
621
622                 if (fill_high_areas_) {
623                         // Any edge terminates a high area
624                         if (rising_edge_seen) {
625                                 const int width = x - rising_edge_x;
626                                 if (width > 0)
627                                         high_rects.emplace_back(rising_edge_x, high_offset,
628                                                 width, signal_height);
629                                 rising_edge_seen = false;
630                         }
631
632                         // Only rising edges start high areas
633                         if ((*i).second) {
634                                 rising_edge_x = x;
635                                 rising_edge_seen = true;
636                         }
637                 }
638
639                 if (show_sampling_points)
640                         while (sampling_point_sample < (*i).first) {
641                                 const float y = (*i).second ? low_offset : high_offset;
642                                 sampling_points.emplace_back(
643                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
644                                 sampling_point_sample++;
645                                 sampling_point_x += pixels_per_sample;
646                         };
647         }
648
649         // Calculate the sample points from the last edge to the end of the trace
650         if (show_sampling_points)
651                 while ((uint64_t)sampling_point_sample <= end_sample) {
652                         // Signal changed after the last edge, so the level is inverted
653                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
654                         sampling_points.emplace_back(
655                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
656                         sampling_point_sample++;
657                         sampling_point_x += pixels_per_sample;
658                 };
659
660         if (fill_high_areas_) {
661                 // Add last high rectangle if the signal is still high at the end of the trace
662                 if (rising_edge_seen && (edges.cend() - 1)->second)
663                         high_rects.emplace_back(rising_edge_x, high_offset,
664                                 last_sample_x - rising_edge_x, signal_height);
665
666                 p.setPen(high_fill_color_);
667                 p.setBrush(high_fill_color_);
668                 p.drawRects((const QRectF*)(high_rects.data()), high_rects.size());
669         }
670
671         p.setPen(LogicSignal::EdgeColor);
672         p.drawLines(edge_lines, edge_count);
673         delete[] edge_lines;
674
675         // Paint the caps
676         const unsigned int max_cap_line_count = edges.size();
677         QLineF *const cap_lines = new QLineF[max_cap_line_count];
678
679         p.setPen(LogicSignal::HighColor);
680         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
681                 pixels_offset, pp.left(), high_offset);
682         p.setPen(LogicSignal::LowColor);
683         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
684                 pixels_offset, pp.left(), low_offset);
685
686         delete[] cap_lines;
687
688         // Paint the sampling points
689         if (show_sampling_points) {
690                 p.setPen(SamplingPointColor);
691                 p.drawRects(sampling_points.data(), sampling_points.size());
692         }
693 }
694
695 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
696         vector< pair<int64_t, bool> > &edges, bool level,
697         double samples_per_pixel, double pixels_offset, float x_offset,
698         float y_offset)
699 {
700         QLineF *line = lines;
701
702         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
703                 if ((*i).second == level) {
704                         *line++ = QLineF(
705                                 ((*i).first / samples_per_pixel -
706                                         pixels_offset) + x_offset, y_offset,
707                                 ((*(i+1)).first / samples_per_pixel -
708                                         pixels_offset) + x_offset, y_offset);
709                 }
710
711         p.drawLines(lines, line - lines);
712 }
713
714 shared_ptr<pv::data::AnalogSegment> AnalogSignal::get_analog_segment_to_paint() const
715 {
716         shared_ptr<pv::data::AnalogSegment> segment;
717
718         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
719                 base_->analog_data()->analog_segments();
720
721         if (!segments.empty()) {
722                 if (segment_display_mode_ == ShowLastSegmentOnly)
723                         segment = segments.back();
724
725                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
726                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
727                         try {
728                                 segment = segments.at(current_segment_);
729                         } catch (out_of_range&) {
730                                 qDebug() << "Current analog segment out of range for signal" << base_->name() << ":" << current_segment_;
731                         }
732                 }
733         }
734
735         return segment;
736 }
737
738 shared_ptr<pv::data::LogicSegment> AnalogSignal::get_logic_segment_to_paint() const
739 {
740         shared_ptr<pv::data::LogicSegment> segment;
741
742         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
743                 base_->logic_data()->logic_segments();
744
745         if (!segments.empty()) {
746                 if (segment_display_mode_ == ShowLastSegmentOnly)
747                         segment = segments.back();
748
749                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
750                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
751                         try {
752                                 segment = segments.at(current_segment_);
753                         } catch (out_of_range&) {
754                                 qDebug() << "Current logic segment out of range for signal" << base_->name() << ":" << current_segment_;
755                         }
756                 }
757         }
758
759         return segment;
760 }
761
762 float AnalogSignal::get_resolution(int scale_index)
763 {
764         const float seq[] = {1.0f, 2.0f, 5.0f};
765
766         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
767         const div_t d = div((int)(scale_index + countof(seq) * offset),
768                 countof(seq));
769
770         return powf(10.0f, d.quot - offset) * seq[d.rem];
771 }
772
773 void AnalogSignal::update_scale()
774 {
775         resolution_ = get_resolution(scale_index_);
776         scale_ = div_height_ / resolution_;
777 }
778
779 void AnalogSignal::update_conversion_widgets()
780 {
781         SignalBase::ConversionType conv_type = base_->get_conversion_type();
782
783         // Enable or disable widgets depending on conversion state
784         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
785         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
786
787         conv_threshold_cb_->clear();
788
789         vector < pair<QString, int> > presets = base_->get_conversion_presets();
790
791         // Prevent the combo box from firing the "edit text changed" signal
792         // as that would involuntarily select the first entry
793         conv_threshold_cb_->blockSignals(true);
794
795         // Set available options depending on chosen conversion
796         for (pair<QString, int>& preset : presets)
797                 conv_threshold_cb_->addItem(preset.first, preset.second);
798
799         map < QString, QVariant > options = base_->get_conversion_options();
800
801         if (conv_type == SignalBase::A2LConversionByThreshold) {
802                 const vector<double> thresholds = base_->get_conversion_thresholds(
803                                 SignalBase::A2LConversionByThreshold, true);
804                 conv_threshold_cb_->addItem(
805                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
806         }
807
808         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
809                 const vector<double> thresholds = base_->get_conversion_thresholds(
810                                 SignalBase::A2LConversionBySchmittTrigger, true);
811                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
812                                 QString::number(thresholds[0], 'f', 1),
813                                 QString::number(thresholds[1], 'f', 1)), -1);
814         }
815
816         int preset_id = base_->get_current_conversion_preset();
817         conv_threshold_cb_->setCurrentIndex(
818                         conv_threshold_cb_->findData(preset_id));
819
820         conv_threshold_cb_->blockSignals(false);
821 }
822
823 vector<data::LogicSegment::EdgePair> AnalogSignal::get_nearest_level_changes(uint64_t sample_pos)
824 {
825         assert(base_);
826         assert(owner_);
827
828         // Return if there's no logic data or we're showing only the analog trace
829         if (!base_->logic_data() || (display_type_ == DisplayAnalog))
830                 return vector<data::LogicSegment::EdgePair>();
831
832         if (sample_pos == 0)
833                 return vector<LogicSegment::EdgePair>();
834
835         shared_ptr<LogicSegment> segment = get_logic_segment_to_paint();
836         if (!segment || (segment->get_sample_count() == 0))
837                 return vector<LogicSegment::EdgePair>();
838
839         const View *view = owner_->view();
840         assert(view);
841         const double samples_per_pixel = base_->get_samplerate() * view->scale();
842
843         vector<LogicSegment::EdgePair> edges;
844
845         segment->get_surrounding_edges(edges, sample_pos,
846                 samples_per_pixel / LogicSignal::Oversampling, 0);
847
848         if (edges.empty())
849                 return vector<LogicSegment::EdgePair>();
850
851         return edges;
852 }
853
854 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
855 {
856         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
857                 base_->analog_data()->analog_segments();
858
859         if (segments.empty())
860                 return;
861
862         double min = 0, max = 0;
863
864         for (const shared_ptr<pv::data::AnalogSegment>& segment : segments) {
865                 pair<double, double> mm = segment->get_min_max();
866                 min = std::min(min, mm.first);
867                 max = std::max(max, mm.second);
868         }
869
870         if ((min == signal_min_) && (max == signal_max_) && !force_update)
871                 return;
872
873         signal_min_ = min;
874         signal_max_ = max;
875
876         // If we're allowed to alter the div assignment...
877         if (!keep_divs) {
878                 // Use all divs for the positive range if there are no negative values
879                 if ((min == 0) && (neg_vdivs_ > 0)) {
880                         pos_vdivs_ += neg_vdivs_;
881                         neg_vdivs_ = 0;
882                 }
883
884                 // Split up the divs if there are negative values but no negative divs
885                 if ((min < 0) && (neg_vdivs_ == 0)) {
886                         neg_vdivs_ = pos_vdivs_ / 2;
887                         pos_vdivs_ -= neg_vdivs_;
888                 }
889         }
890
891         // If there is still no positive div when we need it, add one
892         // (this can happen when pos_vdivs==neg_vdivs==0)
893         if ((max > 0) && (pos_vdivs_ == 0)) {
894                 pos_vdivs_ = 1;
895                 owner_->extents_changed(false, true);
896         }
897
898         // If there is still no negative div when we need it, add one
899         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
900         if ((min < 0) && (neg_vdivs_ == 0)) {
901                 neg_vdivs_ = 1;
902                 owner_->extents_changed(false, true);
903         }
904
905         double min_value_per_div;
906         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
907                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
908         else if (pos_vdivs_ > 0)
909                 min_value_per_div = max / pos_vdivs_;
910         else
911                 min_value_per_div = -min / neg_vdivs_;
912
913         // Find first scale value that is bigger than the value we need
914         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
915                 if (get_resolution(i) > min_value_per_div) {
916                         scale_index_ = i;
917                         break;
918                 }
919
920         update_scale();
921 }
922
923 void AnalogSignal::reset_pixel_values()
924 {
925         value_at_pixel_pos_.clear();
926         current_pixel_pos_ = -1;
927         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
928 }
929
930 void AnalogSignal::process_next_sample_value(float x, float value)
931 {
932         // Note: NAN is used to indicate the non-existance of a value at this pixel
933
934         if (std::isnan(prev_value_at_pixel_)) {
935                 if (x < 0) {
936                         min_value_at_pixel_ = value;
937                         max_value_at_pixel_ = value;
938                         prev_value_at_pixel_ = value;
939                         current_pixel_pos_ = x;
940                 } else
941                         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
942         }
943
944         const int pixel_pos = (int)(x + 0.5);
945
946         if (pixel_pos > current_pixel_pos_) {
947                 if (pixel_pos - current_pixel_pos_ == 1) {
948                         if (std::isnan(prev_value_at_pixel_)) {
949                                 value_at_pixel_pos_.push_back(prev_value_at_pixel_);
950                         } else {
951                                 // Average the min/max range to create one value for the previous pixel
952                                 const float avg = (min_value_at_pixel_ + max_value_at_pixel_) / 2;
953                                 value_at_pixel_pos_.push_back(avg);
954                         }
955                 } else {
956                         // Interpolate values to create values for the intermediate pixels
957                         const float start_value = prev_value_at_pixel_;
958                         const float end_value = value;
959                         const int steps = fabs(pixel_pos - current_pixel_pos_);
960                         const double gradient = (end_value - start_value) / steps;
961                         for (int i = 0; i < steps; i++) {
962                                 if (current_pixel_pos_ + i < 0)
963                                         continue;
964                                 value_at_pixel_pos_.push_back(start_value + i * gradient);
965                         }
966                 }
967
968                 min_value_at_pixel_ = value;
969                 max_value_at_pixel_ = value;
970                 prev_value_at_pixel_ = value;
971                 current_pixel_pos_ = pixel_pos;
972         } else {
973                 // Another sample for the same pixel
974                 if (value < min_value_at_pixel_)
975                         min_value_at_pixel_ = value;
976                 if (value > max_value_at_pixel_)
977                         max_value_at_pixel_ = value;
978         }
979 }
980
981 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
982 {
983         // Add the standard options
984         Signal::populate_popup_form(parent, form);
985
986         // Add div-related settings
987         pvdiv_sb_ = new QSpinBox(parent);
988         pvdiv_sb_->setRange(0, MaximumVDivs);
989         pvdiv_sb_->setValue(pos_vdivs_);
990         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
991                 this, SLOT(on_pos_vdivs_changed(int)));
992         form->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
993
994         nvdiv_sb_ = new QSpinBox(parent);
995         nvdiv_sb_->setRange(0, MaximumVDivs);
996         nvdiv_sb_->setValue(neg_vdivs_);
997         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
998                 this, SLOT(on_neg_vdivs_changed(int)));
999         form->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
1000
1001         div_height_sb_ = new QSpinBox(parent);
1002         div_height_sb_->setRange(20, 1000);
1003         div_height_sb_->setSingleStep(5);
1004         div_height_sb_->setSuffix(tr(" pixels"));
1005         div_height_sb_->setValue(div_height_);
1006         connect(div_height_sb_, SIGNAL(valueChanged(int)),
1007                 this, SLOT(on_div_height_changed(int)));
1008         form->addRow(tr("Div height"), div_height_sb_);
1009
1010         // Add the vertical resolution
1011         resolution_cb_ = new QComboBox(parent);
1012
1013         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
1014                 const QString label = QString("%1").arg(get_resolution(i));
1015                 resolution_cb_->insertItem(0, label, QVariant(i));
1016         }
1017
1018         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
1019         resolution_cb_->setCurrentIndex(cur_idx);
1020
1021         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
1022                 this, SLOT(on_resolution_changed(int)));
1023
1024         QGridLayout *const vdiv_layout = new QGridLayout;
1025         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
1026         vdiv_layout->addWidget(resolution_cb_, 0, 0);
1027         vdiv_layout->addWidget(vdiv_unit, 0, 1);
1028
1029         form->addRow(tr("Vertical resolution"), vdiv_layout);
1030
1031         // Add the autoranging checkbox
1032         QCheckBox* autoranging_cb = new QCheckBox();
1033         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
1034
1035         connect(autoranging_cb, SIGNAL(stateChanged(int)),
1036                 this, SLOT(on_autoranging_changed(int)));
1037
1038         form->addRow(tr("Autoranging"), autoranging_cb);
1039
1040         // Add the conversion type dropdown
1041         conversion_cb_ = new QComboBox();
1042
1043         conversion_cb_->addItem(tr("none"),
1044                 SignalBase::NoConversion);
1045         conversion_cb_->addItem(tr("to logic via threshold"),
1046                 SignalBase::A2LConversionByThreshold);
1047         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
1048                 SignalBase::A2LConversionBySchmittTrigger);
1049
1050         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
1051         conversion_cb_->setCurrentIndex(cur_idx);
1052
1053         form->addRow(tr("Conversion"), conversion_cb_);
1054
1055         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
1056                 this, SLOT(on_conversion_changed(int)));
1057
1058     // Add the conversion threshold settings
1059     conv_threshold_cb_ = new QComboBox();
1060     conv_threshold_cb_->setEditable(true);
1061
1062     form->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
1063
1064     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
1065             this, SLOT(on_conv_threshold_changed(int)));
1066     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString&)),
1067             this, SLOT(on_conv_threshold_changed()));  // index will be -1
1068
1069         // Add the display type dropdown
1070         display_type_cb_ = new QComboBox();
1071
1072         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
1073         display_type_cb_->addItem(tr("converted"), DisplayConverted);
1074         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
1075
1076         cur_idx = display_type_cb_->findData(QVariant(display_type_));
1077         display_type_cb_->setCurrentIndex(cur_idx);
1078
1079         form->addRow(tr("Show traces for"), display_type_cb_);
1080
1081         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
1082                 this, SLOT(on_display_type_changed(int)));
1083
1084         // Update the conversion widget contents and states
1085         update_conversion_widgets();
1086 }
1087
1088 void AnalogSignal::hover_point_changed(const QPoint &hp)
1089 {
1090         Signal::hover_point_changed(hp);
1091
1092         // Note: Even though the view area begins at 0, we exclude 0 because
1093         // that's also the value given when the cursor is over the header to the
1094         // left of the trace paint area
1095         if (hp.x() <= 0) {
1096                 value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
1097         } else {
1098                 if ((size_t)hp.x() < value_at_pixel_pos_.size())
1099                         value_at_hover_pos_ = value_at_pixel_pos_.at(hp.x());
1100                 else
1101                         value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
1102         }
1103 }
1104
1105 void AnalogSignal::on_setting_changed(const QString &key, const QVariant &value)
1106 {
1107         Signal::on_setting_changed(key, value);
1108
1109         if (key == GlobalSettings::Key_View_ShowSamplingPoints)
1110                 show_sampling_points_ = value.toBool();
1111
1112         if (key == GlobalSettings::Key_View_FillSignalHighAreas)
1113                 fill_high_areas_ = value.toBool();
1114
1115         if (key == GlobalSettings::Key_View_FillSignalHighAreaColor)
1116                 high_fill_color_ = QColor::fromRgba(value.value<uint32_t>());
1117
1118         if (key == GlobalSettings::Key_View_ShowAnalogMinorGrid)
1119                 show_analog_minor_grid_ = value.toBool();
1120
1121         if (key == GlobalSettings::Key_View_ConversionThresholdDispMode) {
1122                 conversion_threshold_disp_mode_ = value.toInt();
1123
1124                 if (owner_)
1125                         owner_->row_item_appearance_changed(false, true);
1126         }
1127 }
1128
1129 void AnalogSignal::on_min_max_changed(float min, float max)
1130 {
1131         if (autoranging_)
1132                 perform_autoranging(false, false);
1133         else {
1134                 if (min < signal_min_) signal_min_ = min;
1135                 if (max > signal_max_) signal_max_ = max;
1136         }
1137 }
1138
1139 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
1140 {
1141         if (vdivs == pos_vdivs_)
1142                 return;
1143
1144         pos_vdivs_ = vdivs;
1145
1146         // There has to be at least one div, positive or negative
1147         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
1148                 pos_vdivs_ = 1;
1149                 if (pvdiv_sb_)
1150                         pvdiv_sb_->setValue(pos_vdivs_);
1151         }
1152
1153         if (autoranging_) {
1154                 perform_autoranging(true, true);
1155
1156                 // It could be that a positive or negative div was added, so update
1157                 if (pvdiv_sb_) {
1158                         pvdiv_sb_->setValue(pos_vdivs_);
1159                         nvdiv_sb_->setValue(neg_vdivs_);
1160                 }
1161         }
1162
1163         if (owner_) {
1164                 // Call order is important, otherwise the lazy event handler won't work
1165                 owner_->extents_changed(false, true);
1166                 owner_->row_item_appearance_changed(false, true);
1167         }
1168 }
1169
1170 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
1171 {
1172         if (vdivs == neg_vdivs_)
1173                 return;
1174
1175         neg_vdivs_ = vdivs;
1176
1177         // There has to be at least one div, positive or negative
1178         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
1179                 pos_vdivs_ = 1;
1180                 if (pvdiv_sb_)
1181                         pvdiv_sb_->setValue(pos_vdivs_);
1182         }
1183
1184         if (autoranging_) {
1185                 perform_autoranging(true, true);
1186
1187                 // It could be that a positive or negative div was added, so update
1188                 if (pvdiv_sb_) {
1189                         pvdiv_sb_->setValue(pos_vdivs_);
1190                         nvdiv_sb_->setValue(neg_vdivs_);
1191                 }
1192         }
1193
1194         if (owner_) {
1195                 // Call order is important, otherwise the lazy event handler won't work
1196                 owner_->extents_changed(false, true);
1197                 owner_->row_item_appearance_changed(false, true);
1198         }
1199 }
1200
1201 void AnalogSignal::on_div_height_changed(int height)
1202 {
1203         div_height_ = height;
1204         update_scale();
1205
1206         if (owner_) {
1207                 // Call order is important, otherwise the lazy event handler won't work
1208                 owner_->extents_changed(false, true);
1209                 owner_->row_item_appearance_changed(false, true);
1210         }
1211 }
1212
1213 void AnalogSignal::on_resolution_changed(int index)
1214 {
1215         scale_index_ = resolution_cb_->itemData(index).toInt();
1216         update_scale();
1217
1218         if (owner_)
1219                 owner_->row_item_appearance_changed(false, true);
1220 }
1221
1222 void AnalogSignal::on_autoranging_changed(int state)
1223 {
1224         autoranging_ = (state == Qt::Checked);
1225
1226         if (autoranging_)
1227                 perform_autoranging(false, true);
1228
1229         if (owner_) {
1230                 // Call order is important, otherwise the lazy event handler won't work
1231                 owner_->extents_changed(false, true);
1232                 owner_->row_item_appearance_changed(false, true);
1233         }
1234 }
1235
1236 void AnalogSignal::on_conversion_changed(int index)
1237 {
1238         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
1239
1240         SignalBase::ConversionType conv_type =
1241                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
1242
1243         if (conv_type != old_conv_type) {
1244                 base_->set_conversion_type(conv_type);
1245                 update_conversion_widgets();
1246
1247                 if (owner_)
1248                         owner_->row_item_appearance_changed(false, true);
1249         }
1250 }
1251
1252 void AnalogSignal::on_conv_threshold_changed(int index)
1253 {
1254         SignalBase::ConversionType conv_type = base_->get_conversion_type();
1255
1256         // Note: index is set to -1 if the text in the combo box matches none of
1257         // the entries in the combo box
1258
1259         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
1260                 return;
1261
1262         // The combo box entry with the custom value has user_data set to -1
1263         const int user_data = conv_threshold_cb_->findText(
1264                         conv_threshold_cb_->currentText());
1265
1266         const bool use_custom_thr = (index == -1) || (user_data == -1);
1267
1268         if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
1269                 // Not one of the preset values, try to parse the combo box text
1270                 // Note: Regex loosely based on
1271                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
1272                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1273                 QString re2 = "([a-zA-Z]*)"; // SI unit
1274                 QRegExp regex(re1 + re2);
1275
1276                 const QString text = conv_threshold_cb_->currentText();
1277                 if (!regex.exactMatch(text))
1278                         return;  // String doesn't match the regex
1279
1280                 QStringList tokens = regex.capturedTexts();
1281
1282                 // For now, we simply assume that the unit is volt without modifiers
1283                 const double thr = tokens.at(1).toDouble();
1284
1285                 // Only restart the conversion if the threshold was updated.
1286                 // We're starting a delayed conversion because the user may still be
1287                 // typing and the UI would lag if we kept on restarting it immediately
1288                 if (base_->set_conversion_option("threshold_value", thr))
1289                         base_->start_conversion(true);
1290         }
1291
1292         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
1293                 // Not one of the preset values, try to parse the combo box text
1294                 // Note: Regex loosely based on
1295                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
1296                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1297                 QString re2 = "([a-zA-Z]*)"; // SI unit
1298                 QString re3 = "\\/"; // Forward slash, not captured
1299                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1300                 QString re5 = "([a-zA-Z]*)"; // SI unit
1301                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
1302
1303                 const QString text = conv_threshold_cb_->currentText();
1304                 if (!regex.exactMatch(text))
1305                         return;  // String doesn't match the regex
1306
1307                 QStringList tokens = regex.capturedTexts();
1308
1309                 // For now, we simply assume that the unit is volt without modifiers
1310                 const double low_thr = tokens.at(1).toDouble();
1311                 const double high_thr = tokens.at(3).toDouble();
1312
1313                 // Only restart the conversion if one of the options was updated.
1314                 // We're starting a delayed conversion because the user may still be
1315                 // typing and the UI would lag if we kept on restarting it immediately
1316                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1317                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1318                 if (o1 || o2)
1319                         base_->start_conversion(true);  // Start delayed conversion
1320         }
1321
1322         base_->set_conversion_preset((SignalBase::ConversionPreset)index);
1323
1324         // Immediately start the conversion if we're not using custom values
1325         // (i.e. we're using one of the presets)
1326         if (!use_custom_thr)
1327                 base_->start_conversion();
1328 }
1329
1330 void AnalogSignal::on_delayed_conversion_starter()
1331 {
1332         base_->start_conversion();
1333 }
1334
1335 void AnalogSignal::on_display_type_changed(int index)
1336 {
1337         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1338
1339         if (owner_)
1340                 owner_->row_item_appearance_changed(false, true);
1341 }
1342
1343 } // namespace trace
1344 } // namespace views
1345 } // namespace pv