Session: Use a monotonic clock to measure acquisition time.
[pulseview.git] / 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 <QFormLayout>
32 #include <QGridLayout>
33 #include <QLabel>
34 #include <QString>
35
36 #include "analogsignal.hpp"
37 #include "logicsignal.hpp"
38 #include "view.hpp"
39
40 #include "pv/data/analog.hpp"
41 #include "pv/data/analogsegment.hpp"
42 #include "pv/data/logic.hpp"
43 #include "pv/data/logicsegment.hpp"
44 #include "pv/data/signalbase.hpp"
45 #include "pv/globalsettings.hpp"
46
47 #include <libsigrokcxx/libsigrokcxx.hpp>
48
49 using std::deque;
50 using std::div;
51 using std::div_t;
52 using std::max;
53 using std::make_pair;
54 using std::min;
55 using std::numeric_limits;
56 using std::pair;
57 using std::shared_ptr;
58 using std::vector;
59
60 namespace pv {
61 namespace views {
62 namespace trace {
63
64 const QColor AnalogSignal::SignalColours[4] = {
65         QColor(0xC4, 0xA0, 0x00),       // Yellow
66         QColor(0x87, 0x20, 0x7A),       // Magenta
67         QColor(0x20, 0x4A, 0x87),       // Blue
68         QColor(0x4E, 0x9A, 0x06)        // Green
69 };
70
71 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
72 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
73
74 const QColor AnalogSignal::SamplingPointColour(0x77, 0x77, 0x77);
75
76 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
77 const float AnalogSignal::EnvelopeThreshold = 64.0f;
78
79 const int AnalogSignal::MaximumVDivs = 10;
80 const int AnalogSignal::MinScaleIndex = -6;
81 const int AnalogSignal::MaxScaleIndex = 7;
82
83 const int AnalogSignal::InfoTextMarginRight = 20;
84 const int AnalogSignal::InfoTextMarginBottom = 5;
85
86 AnalogSignal::AnalogSignal(
87         pv::Session &session,
88         shared_ptr<data::SignalBase> base) :
89         Signal(session, base),
90         scale_index_(4), // 20 per div
91         scale_index_drag_offset_(0),
92         pos_vdivs_(1),
93         neg_vdivs_(1),
94         resolution_(0),
95         display_type_(DisplayBoth),
96         autoranging_(true)
97 {
98         pv::data::Analog* analog_data =
99                 dynamic_cast<pv::data::Analog*>(data().get());
100
101         connect(analog_data, SIGNAL(samples_added(QObject*, uint64_t, uint64_t)),
102                 this, SLOT(on_samples_added()));
103
104         GlobalSettings gs;
105         div_height_ = gs.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
106
107         base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]);
108         update_scale();
109 }
110
111 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
112 {
113         return base_->analog_data();
114 }
115
116 void AnalogSignal::save_settings(QSettings &settings) const
117 {
118         settings.setValue("pos_vdivs", pos_vdivs_);
119         settings.setValue("neg_vdivs", neg_vdivs_);
120         settings.setValue("scale_index", scale_index_);
121         settings.setValue("display_type", display_type_);
122         settings.setValue("autoranging", autoranging_);
123         settings.setValue("div_height", div_height_);
124 }
125
126 void AnalogSignal::restore_settings(QSettings &settings)
127 {
128         if (settings.contains("pos_vdivs"))
129                 pos_vdivs_ = settings.value("pos_vdivs").toInt();
130
131         if (settings.contains("neg_vdivs"))
132                 neg_vdivs_ = settings.value("neg_vdivs").toInt();
133
134         if (settings.contains("scale_index")) {
135                 scale_index_ = settings.value("scale_index").toInt();
136                 update_scale();
137         }
138
139         if (settings.contains("display_type"))
140                 display_type_ = (DisplayType)(settings.value("display_type").toInt());
141
142         if (settings.contains("autoranging"))
143                 autoranging_ = settings.value("autoranging").toBool();
144
145         if (settings.contains("div_height")) {
146                 const int old_height = div_height_;
147                 div_height_ = settings.value("div_height").toInt();
148
149                 if ((div_height_ != old_height) && owner_) {
150                         // Call order is important, otherwise the lazy event handler won't work
151                         owner_->extents_changed(false, true);
152                         owner_->row_item_appearance_changed(false, true);
153                 }
154         }
155 }
156
157 pair<int, int> AnalogSignal::v_extents() const
158 {
159         const int ph = pos_vdivs_ * div_height_;
160         const int nh = neg_vdivs_ * div_height_;
161         return make_pair(-ph, nh);
162 }
163
164 int AnalogSignal::scale_handle_offset() const
165 {
166         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
167
168         return ((scale_index_drag_offset_ - scale_index_) * h / 4) - h / 2;
169 }
170
171 void AnalogSignal::scale_handle_dragged(int offset)
172 {
173         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
174
175         scale_index_ = scale_index_drag_offset_ - (offset + h / 2) / (h / 4);
176
177         update_scale();
178 }
179
180 void AnalogSignal::scale_handle_drag_release()
181 {
182         scale_index_drag_offset_ = scale_index_;
183         update_scale();
184 }
185
186 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
187 {
188         if (base_->enabled()) {
189                 Trace::paint_back(p, pp);
190                 paint_axis(p, pp, get_visual_y());
191         }
192 }
193
194 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
195 {
196         assert(base_->analog_data());
197         assert(owner_);
198
199         const int y = get_visual_y();
200
201         if (!base_->enabled())
202                 return;
203
204         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
205                 paint_grid(p, y, pp.left(), pp.right());
206
207                 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
208                         base_->analog_data()->analog_segments();
209                 if (segments.empty())
210                         return;
211
212                 const shared_ptr<pv::data::AnalogSegment> &segment =
213                         segments.front();
214
215                 const double pixels_offset = pp.pixels_offset();
216                 const double samplerate = max(1.0, segment->samplerate());
217                 const pv::util::Timestamp& start_time = segment->start_time();
218                 const int64_t last_sample = segment->get_sample_count() - 1;
219                 const double samples_per_pixel = samplerate * pp.scale();
220                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
221                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
222
223                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
224                         (int64_t)0), last_sample);
225                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
226                         (int64_t)0), last_sample);
227
228                 if (samples_per_pixel < EnvelopeThreshold)
229                         paint_trace(p, segment, y, pp.left(),
230                                 start_sample, end_sample,
231                                 pixels_offset, samples_per_pixel);
232                 else
233                         paint_envelope(p, segment, y, pp.left(),
234                                 start_sample, end_sample,
235                                 pixels_offset, samples_per_pixel);
236         }
237
238         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth)) {
239                 const data::SignalBase::ConversionType conv_type =
240                         base_->get_conversion_type();
241
242                 if (((conv_type == data::SignalBase::A2LConversionByTreshold) ||
243                         (conv_type == data::SignalBase::A2LConversionBySchmittTrigger))) {
244
245                         paint_logic_mid(p, pp);
246                 }
247         }
248 }
249
250 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
251 {
252         if (!enabled())
253                 return;
254
255         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
256                 const int y = get_visual_y();
257
258                 // Show the info section on the right side of the trace
259                 const QString infotext = QString("%1 V/div").arg(resolution_);
260
261                 p.setPen(base_->colour());
262                 p.setFont(QApplication::font());
263
264                 const QRectF bounding_rect = QRectF(pp.left(),
265                                 y + v_extents().first,
266                                 pp.width() - InfoTextMarginRight,
267                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
268
269                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
270         }
271 }
272
273 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
274 {
275         p.setRenderHint(QPainter::Antialiasing, false);
276
277         GlobalSettings settings;
278         const bool show_analog_minor_grid =
279                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
280
281         if (pos_vdivs_ > 0) {
282                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
283                 for (int i = 1; i <= pos_vdivs_; i++) {
284                         const float dy = i * div_height_;
285                         p.drawLine(QLineF(left, y - dy, right, y - dy));
286                 }
287         }
288
289         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
290                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
291                 for (int i = 0; i < pos_vdivs_; i++) {
292                         const float dy = i * div_height_;
293                         const float dy25 = dy + (0.25 * div_height_);
294                         const float dy50 = dy + (0.50 * div_height_);
295                         const float dy75 = dy + (0.75 * div_height_);
296                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
297                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
298                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
299                 }
300         }
301
302         if (neg_vdivs_ > 0) {
303                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
304                 for (int i = 1; i <= neg_vdivs_; i++) {
305                         const float dy = i * div_height_;
306                         p.drawLine(QLineF(left, y + dy, right, y + dy));
307                 }
308         }
309
310         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
311                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
312                 for (int i = 0; i < neg_vdivs_; i++) {
313                         const float dy = i * div_height_;
314                         const float dy25 = dy + (0.25 * div_height_);
315                         const float dy50 = dy + (0.50 * div_height_);
316                         const float dy75 = dy + (0.75 * div_height_);
317                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
318                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
319                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
320                 }
321         }
322
323         p.setRenderHint(QPainter::Antialiasing, true);
324 }
325
326 void AnalogSignal::paint_trace(QPainter &p,
327         const shared_ptr<pv::data::AnalogSegment> &segment,
328         int y, int left, const int64_t start, const int64_t end,
329         const double pixels_offset, const double samples_per_pixel)
330 {
331         if (end <= start)
332                 return;
333
334         // Calculate and paint the sampling points if enabled and useful
335         GlobalSettings settings;
336         const bool show_sampling_points =
337                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
338                 (samples_per_pixel < 0.25);
339
340         p.setPen(base_->colour());
341
342         const int64_t points_count = end - start;
343
344         QPointF *points = new QPointF[points_count];
345         QPointF *point = points;
346
347         QRectF *sampling_points = nullptr;
348         if (show_sampling_points)
349                  sampling_points = new QRectF[points_count];
350         QRectF *sampling_point = sampling_points;
351
352         int64_t sample_count = min(points_count, TracePaintBlockSize);
353         int64_t block_sample = 0;
354         float *sample_block = new float[TracePaintBlockSize];
355         segment->get_samples(start, start + sample_count, sample_block);
356
357         const int w = 2;
358         for (int64_t sample = start; sample != end; sample++, block_sample++) {
359
360                 if (block_sample == TracePaintBlockSize) {
361                         block_sample = 0;
362                         sample_count = min(points_count - sample, TracePaintBlockSize);
363                         segment->get_samples(sample, sample + sample_count, sample_block);
364                 }
365
366                 const float x = (sample / samples_per_pixel -
367                         pixels_offset) + left;
368
369                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
370
371                 if (show_sampling_points)
372                         *sampling_point++ =
373                                 QRectF(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
374         }
375         delete[] sample_block;
376
377         p.drawPolyline(points, points_count);
378
379         if (show_sampling_points) {
380                 p.setPen(SamplingPointColour);
381                 p.drawRects(sampling_points, points_count);
382                 delete[] sampling_points;
383         }
384
385         delete[] points;
386 }
387
388 void AnalogSignal::paint_envelope(QPainter &p,
389         const shared_ptr<pv::data::AnalogSegment> &segment,
390         int y, int left, const int64_t start, const int64_t end,
391         const double pixels_offset, const double samples_per_pixel)
392 {
393         using pv::data::AnalogSegment;
394
395         AnalogSegment::EnvelopeSection e;
396         segment->get_envelope_section(e, start, end, samples_per_pixel);
397
398         if (e.length < 2)
399                 return;
400
401         p.setPen(QPen(Qt::NoPen));
402         p.setBrush(base_->colour());
403
404         QRectF *const rects = new QRectF[e.length];
405         QRectF *rect = rects;
406
407         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
408                 const float x = ((e.scale * sample + e.start) /
409                         samples_per_pixel - pixels_offset) + left;
410                 const AnalogSegment::EnvelopeSample *const s =
411                         e.samples + sample;
412
413                 // We overlap this sample with the next so that vertical
414                 // gaps do not appear during steep rising or falling edges
415                 const float b = y - max(s->max, (s + 1)->min) * scale_;
416                 const float t = y - min(s->min, (s + 1)->max) * scale_;
417
418                 float h = b - t;
419                 if (h >= 0.0f && h <= 1.0f)
420                         h = 1.0f;
421                 if (h <= 0.0f && h >= -1.0f)
422                         h = -1.0f;
423
424                 *rect++ = QRectF(x, t, 1.0f, h);
425         }
426
427         p.drawRects(rects, e.length);
428
429         delete[] rects;
430         delete[] e.samples;
431 }
432
433 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
434 {
435         QLineF *line;
436
437         vector< pair<int64_t, bool> > edges;
438
439         assert(base_);
440
441         const int y = get_visual_y();
442
443         if (!base_->enabled() || !base_->logic_data())
444                 return;
445
446         const int signal_margin =
447                 QFontMetrics(QApplication::font()).height() / 2;
448
449         const int ph = min(pos_vdivs_, 1) * div_height_;
450         const int nh = min(neg_vdivs_, 1) * div_height_;
451         const float high_offset = y - ph + signal_margin + 0.5f;
452         const float low_offset = y + nh - signal_margin - 0.5f;
453
454         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
455                 base_->logic_data()->logic_segments();
456
457         if (segments.empty())
458                 return;
459
460         const shared_ptr<pv::data::LogicSegment> &segment =
461                 segments.front();
462
463         double samplerate = segment->samplerate();
464
465         // Show sample rate as 1Hz when it is unknown
466         if (samplerate == 0.0)
467                 samplerate = 1.0;
468
469         const double pixels_offset = pp.pixels_offset();
470         const pv::util::Timestamp& start_time = segment->start_time();
471         const int64_t last_sample = segment->get_sample_count() - 1;
472         const double samples_per_pixel = samplerate * pp.scale();
473         const double pixels_per_sample = 1 / samples_per_pixel;
474         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
475         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
476
477         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
478                 (int64_t)0), last_sample);
479         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
480                 (int64_t)0), last_sample);
481
482         segment->get_subsampled_edges(edges, start_sample, end_sample,
483                 samples_per_pixel / LogicSignal::Oversampling, 0);
484         assert(edges.size() >= 2);
485
486         // Check whether we need to paint the sampling points
487         GlobalSettings settings;
488         const bool show_sampling_points =
489                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
490                 (samples_per_pixel < 0.25);
491
492         vector<QRectF> sampling_points;
493         float sampling_point_x = 0.0f;
494         int64_t sampling_point_sample = start_sample;
495         const int w = 2;
496
497         if (show_sampling_points) {
498                 sampling_points.reserve(end_sample - start_sample + 1);
499                 sampling_point_x = (edges.cbegin()->first / samples_per_pixel - pixels_offset) + pp.left();
500         }
501
502         // Paint the edges
503         const unsigned int edge_count = edges.size() - 2;
504         QLineF *const edge_lines = new QLineF[edge_count];
505         line = edge_lines;
506
507         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
508                 const float x = ((*i).first / samples_per_pixel -
509                         pixels_offset) + pp.left();
510                 *line++ = QLineF(x, high_offset, x, low_offset);
511
512                 if (show_sampling_points)
513                         while (sampling_point_sample < (*i).first) {
514                                 const float y = (*i).second ? low_offset : high_offset;
515                                 sampling_points.emplace_back(
516                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
517                                 sampling_point_sample++;
518                                 sampling_point_x += pixels_per_sample;
519                         };
520         }
521
522         // Calculate the sample points from the last edge to the end of the trace
523         if (show_sampling_points)
524                 while ((uint64_t)sampling_point_sample <= end_sample) {
525                         // Signal changed after the last edge, so the level is inverted
526                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
527                         sampling_points.emplace_back(
528                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
529                         sampling_point_sample++;
530                         sampling_point_x += pixels_per_sample;
531                 };
532
533         p.setPen(LogicSignal::EdgeColour);
534         p.drawLines(edge_lines, edge_count);
535         delete[] edge_lines;
536
537         // Paint the caps
538         const unsigned int max_cap_line_count = edges.size();
539         QLineF *const cap_lines = new QLineF[max_cap_line_count];
540
541         p.setPen(LogicSignal::HighColour);
542         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
543                 pixels_offset, pp.left(), high_offset);
544         p.setPen(LogicSignal::LowColour);
545         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
546                 pixels_offset, pp.left(), low_offset);
547
548         delete[] cap_lines;
549
550         // Paint the sampling points
551         if (show_sampling_points) {
552                 p.setPen(SamplingPointColour);
553                 p.drawRects(sampling_points.data(), sampling_points.size());
554         }
555 }
556
557 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
558         vector< pair<int64_t, bool> > &edges, bool level,
559         double samples_per_pixel, double pixels_offset, float x_offset,
560         float y_offset)
561 {
562         QLineF *line = lines;
563
564         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
565                 if ((*i).second == level) {
566                         *line++ = QLineF(
567                                 ((*i).first / samples_per_pixel -
568                                         pixels_offset) + x_offset, y_offset,
569                                 ((*(i+1)).first / samples_per_pixel -
570                                         pixels_offset) + x_offset, y_offset);
571                 }
572
573         p.drawLines(lines, line - lines);
574 }
575
576 float AnalogSignal::get_resolution(int scale_index)
577 {
578         const float seq[] = {1.0f, 2.0f, 5.0f};
579
580         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
581         const div_t d = div((int)(scale_index + countof(seq) * offset),
582                 countof(seq));
583
584         return powf(10.0f, d.quot - offset) * seq[d.rem];
585 }
586
587 void AnalogSignal::update_scale()
588 {
589         resolution_ = get_resolution(scale_index_);
590         scale_ = div_height_ / resolution_;
591 }
592
593 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
594 {
595         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
596                 base_->analog_data()->analog_segments();
597
598         if (segments.empty())
599                 return;
600
601         static double prev_min = 0, prev_max = 0;
602         double min = 0, max = 0;
603
604         for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
605                 pair<double, double> mm = segment->get_min_max();
606                 min = std::min(min, mm.first);
607                 max = std::max(max, mm.second);
608         }
609
610         if ((min == prev_min) && (max == prev_max) && !force_update)
611                 return;
612
613         prev_min = min;
614         prev_max = max;
615
616         // If we're allowed to alter the div assignment...
617         if (!keep_divs) {
618                 // Use all divs for the positive range if there are no negative values
619                 if ((min == 0) && (neg_vdivs_ > 0)) {
620                         pos_vdivs_ += neg_vdivs_;
621                         neg_vdivs_ = 0;
622                 }
623
624                 // Split up the divs if there are negative values but no negative divs
625                 if ((min < 0) && (neg_vdivs_ == 0)) {
626                         neg_vdivs_ = pos_vdivs_ / 2;
627                         pos_vdivs_ -= neg_vdivs_;
628                 }
629         }
630
631         // If there is still no positive div when we need it, add one
632         // (this can happen when pos_vdivs==neg_vdivs==0)
633         if ((max > 0) && (pos_vdivs_ == 0)) {
634                 pos_vdivs_ = 1;
635                 owner_->extents_changed(false, true);
636         }
637
638         // If there is still no negative div when we need it, add one
639         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
640         if ((min < 0) && (neg_vdivs_ == 0)) {
641                 neg_vdivs_ = 1;
642                 owner_->extents_changed(false, true);
643         }
644
645         double min_value_per_div;
646         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
647                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
648         else if (pos_vdivs_ > 0)
649                 min_value_per_div = max / pos_vdivs_;
650         else
651                 min_value_per_div = -min / neg_vdivs_;
652
653         // Find first scale value that is bigger than the value we need
654         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
655                 if (get_resolution(i) > min_value_per_div) {
656                         scale_index_ = i;
657                         break;
658                 }
659
660         update_scale();
661 }
662
663 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
664 {
665         // Add the standard options
666         Signal::populate_popup_form(parent, form);
667
668         QFormLayout *const layout = new QFormLayout;
669
670         // Add div-related settings
671         pvdiv_sb_ = new QSpinBox(parent);
672         pvdiv_sb_->setRange(0, MaximumVDivs);
673         pvdiv_sb_->setValue(pos_vdivs_);
674         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
675                 this, SLOT(on_pos_vdivs_changed(int)));
676         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
677
678         nvdiv_sb_ = new QSpinBox(parent);
679         nvdiv_sb_->setRange(0, MaximumVDivs);
680         nvdiv_sb_->setValue(neg_vdivs_);
681         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
682                 this, SLOT(on_neg_vdivs_changed(int)));
683         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
684
685         div_height_sb_ = new QSpinBox(parent);
686         div_height_sb_->setRange(20, 1000);
687         div_height_sb_->setSingleStep(5);
688         div_height_sb_->setSuffix(tr(" pixels"));
689         div_height_sb_->setValue(div_height_);
690         connect(div_height_sb_, SIGNAL(valueChanged(int)),
691                 this, SLOT(on_div_height_changed(int)));
692         layout->addRow(tr("Div height"), div_height_sb_);
693
694         // Add the vertical resolution
695         resolution_cb_ = new QComboBox(parent);
696
697         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
698                 const QString label = QString("%1").arg(get_resolution(i));
699                 resolution_cb_->insertItem(0, label, QVariant(i));
700         }
701
702         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
703         resolution_cb_->setCurrentIndex(cur_idx);
704
705         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
706                 this, SLOT(on_resolution_changed(int)));
707
708         QGridLayout *const vdiv_layout = new QGridLayout;
709         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
710         vdiv_layout->addWidget(resolution_cb_, 0, 0);
711         vdiv_layout->addWidget(vdiv_unit, 0, 1);
712
713         layout->addRow(tr("Vertical resolution"), vdiv_layout);
714
715         // Add the autoranging checkbox
716         QCheckBox* autoranging_cb = new QCheckBox();
717         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
718
719         connect(autoranging_cb, SIGNAL(stateChanged(int)),
720                 this, SLOT(on_autoranging_changed(int)));
721
722         layout->addRow(tr("Autoranging"), autoranging_cb);
723
724         // Add the conversion type dropdown
725         conversion_cb_ = new QComboBox();
726
727         conversion_cb_->addItem("none", data::SignalBase::NoConversion);
728         conversion_cb_->addItem("to logic via threshold", data::SignalBase::A2LConversionByTreshold);
729         conversion_cb_->addItem("to logic via schmitt-trigger", data::SignalBase::A2LConversionBySchmittTrigger);
730
731         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
732         conversion_cb_->setCurrentIndex(cur_idx);
733
734         layout->addRow(tr("Conversion"), conversion_cb_);
735
736         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
737                 this, SLOT(on_conversion_changed(int)));
738
739         // Add the display type dropdown
740         display_type_cb_ = new QComboBox();
741
742         display_type_cb_->addItem(tr("Analog"), DisplayAnalog);
743         display_type_cb_->addItem(tr("Converted"), DisplayConverted);
744         display_type_cb_->addItem(tr("Both"), DisplayBoth);
745
746         cur_idx = display_type_cb_->findData(QVariant(display_type_));
747         display_type_cb_->setCurrentIndex(cur_idx);
748
749         layout->addRow(tr("Traces to show:"), display_type_cb_);
750
751         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
752                 this, SLOT(on_display_type_changed(int)));
753
754         form->addRow(layout);
755 }
756
757 void AnalogSignal::on_samples_added()
758 {
759         perform_autoranging(false, false);
760 }
761
762 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
763 {
764         if (vdivs == pos_vdivs_)
765                 return;
766
767         pos_vdivs_ = vdivs;
768
769         // There has to be at least one div, positive or negative
770         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
771                 pos_vdivs_ = 1;
772                 if (pvdiv_sb_)
773                         pvdiv_sb_->setValue(pos_vdivs_);
774         }
775
776         if (autoranging_) {
777                 perform_autoranging(true, true);
778
779                 // It could be that a positive or negative div was added, so update
780                 if (pvdiv_sb_) {
781                         pvdiv_sb_->setValue(pos_vdivs_);
782                         nvdiv_sb_->setValue(neg_vdivs_);
783                 }
784         }
785
786         if (owner_) {
787                 // Call order is important, otherwise the lazy event handler won't work
788                 owner_->extents_changed(false, true);
789                 owner_->row_item_appearance_changed(false, true);
790         }
791 }
792
793 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
794 {
795         if (vdivs == neg_vdivs_)
796                 return;
797
798         neg_vdivs_ = vdivs;
799
800         // There has to be at least one div, positive or negative
801         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
802                 pos_vdivs_ = 1;
803                 if (pvdiv_sb_)
804                         pvdiv_sb_->setValue(pos_vdivs_);
805         }
806
807         if (autoranging_) {
808                 perform_autoranging(true, true);
809
810                 // It could be that a positive or negative div was added, so update
811                 if (pvdiv_sb_) {
812                         pvdiv_sb_->setValue(pos_vdivs_);
813                         nvdiv_sb_->setValue(neg_vdivs_);
814                 }
815         }
816
817         if (owner_) {
818                 // Call order is important, otherwise the lazy event handler won't work
819                 owner_->extents_changed(false, true);
820                 owner_->row_item_appearance_changed(false, true);
821         }
822 }
823
824 void AnalogSignal::on_div_height_changed(int height)
825 {
826         div_height_ = height;
827         update_scale();
828
829         if (owner_) {
830                 // Call order is important, otherwise the lazy event handler won't work
831                 owner_->extents_changed(false, true);
832                 owner_->row_item_appearance_changed(false, true);
833         }
834 }
835
836 void AnalogSignal::on_resolution_changed(int index)
837 {
838         scale_index_ = resolution_cb_->itemData(index).toInt();
839         update_scale();
840
841         if (owner_)
842                 owner_->row_item_appearance_changed(false, true);
843 }
844
845 void AnalogSignal::on_autoranging_changed(int state)
846 {
847         autoranging_ = (state == Qt::Checked);
848
849         if (autoranging_)
850                 perform_autoranging(false, true);
851
852         if (owner_) {
853                 // Call order is important, otherwise the lazy event handler won't work
854                 owner_->extents_changed(false, true);
855                 owner_->row_item_appearance_changed(false, true);
856         }
857 }
858
859 void AnalogSignal::on_conversion_changed(int index)
860 {
861         data::SignalBase::ConversionType old_conv_type =
862                 base_->get_conversion_type();
863
864         data::SignalBase::ConversionType conv_type =
865                 (data::SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
866
867         if (conv_type != old_conv_type) {
868                 base_->set_conversion_type(conv_type);
869
870                 if (owner_)
871                         owner_->row_item_appearance_changed(false, true);
872         }
873 }
874
875 void AnalogSignal::on_display_type_changed(int index)
876 {
877         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
878
879         if (owner_)
880                 owner_->row_item_appearance_changed(false, true);
881 }
882
883 } // namespace trace
884 } // namespace views
885 } // namespace pv