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[pulseview.git] / pv / view / 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 "pv/data/analog.hpp"
38 #include "pv/data/analogsegment.hpp"
39 #include "pv/data/logic.hpp"
40 #include "pv/data/logicsegment.hpp"
41 #include "pv/data/signalbase.hpp"
42 #include "pv/globalsettings.hpp"
43 #include "pv/view/logicsignal.hpp"
44 #include "pv/view/view.hpp"
45
46 #include <libsigrokcxx/libsigrokcxx.hpp>
47
48 using std::deque;
49 using std::div;
50 using std::div_t;
51 using std::max;
52 using std::make_pair;
53 using std::min;
54 using std::numeric_limits;
55 using std::pair;
56 using std::shared_ptr;
57 using std::vector;
58
59 namespace pv {
60 namespace views {
61 namespace TraceView {
62
63 const QColor AnalogSignal::SignalColours[4] = {
64         QColor(0xC4, 0xA0, 0x00),       // Yellow
65         QColor(0x87, 0x20, 0x7A),       // Magenta
66         QColor(0x20, 0x4A, 0x87),       // Blue
67         QColor(0x4E, 0x9A, 0x06)        // Green
68 };
69
70 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
71 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
72
73 const QColor AnalogSignal::SamplingPointColour(0x77, 0x77, 0x77);
74
75 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
76 const float AnalogSignal::EnvelopeThreshold = 64.0f;
77
78 const int AnalogSignal::MaximumVDivs = 10;
79 const int AnalogSignal::MinScaleIndex = -6;
80 const int AnalogSignal::MaxScaleIndex = 7;
81
82 const int AnalogSignal::InfoTextMarginRight = 20;
83 const int AnalogSignal::InfoTextMarginBottom = 5;
84
85 AnalogSignal::AnalogSignal(
86         pv::Session &session,
87         shared_ptr<data::SignalBase> base) :
88         Signal(session, base),
89         scale_index_(4), // 20 per div
90         scale_index_drag_offset_(0),
91         div_height_(3 * QFontMetrics(QApplication::font()).height()),
92         pos_vdivs_(1),
93         neg_vdivs_(1),
94         resolution_(0),
95         conversion_type_(data::SignalBase::NoConversion),
96         display_type_(DisplayBoth),
97         autoranging_(true)
98 {
99         pv::data::Analog* analog_data =
100                 dynamic_cast<pv::data::Analog*>(data().get());
101
102         connect(analog_data, SIGNAL(samples_added(QObject*, uint64_t, uint64_t)),
103                 this, SLOT(on_samples_added()));
104
105         base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]);
106         update_scale();
107 }
108
109 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
110 {
111         return base_->analog_data();
112 }
113
114 void AnalogSignal::save_settings(QSettings &settings) const
115 {
116         settings.setValue("pos_vdivs", pos_vdivs_);
117         settings.setValue("neg_vdivs", neg_vdivs_);
118         settings.setValue("scale_index", scale_index_);
119         settings.setValue("conversion_type", conversion_type_);
120         settings.setValue("display_type", display_type_);
121         settings.setValue("autoranging", autoranging_);
122 }
123
124 void AnalogSignal::restore_settings(QSettings &settings)
125 {
126         if (settings.contains("pos_vdivs"))
127                 pos_vdivs_ = settings.value("pos_vdivs").toInt();
128
129         if (settings.contains("neg_vdivs"))
130                 neg_vdivs_ = settings.value("neg_vdivs").toInt();
131
132         if (settings.contains("scale_index")) {
133                 scale_index_ = settings.value("scale_index").toInt();
134                 update_scale();
135         }
136
137         if (settings.contains("conversion_type")) {
138                 conversion_type_ = (data::SignalBase::ConversionType)(settings.value("conversion_type").toInt());
139                 update_conversion_type();
140         }
141
142         if (settings.contains("display_type"))
143                 display_type_ = (DisplayType)(settings.value("display_type").toInt());
144
145         if (settings.contains("autoranging"))
146                 autoranging_ = settings.value("autoranging").toBool();
147 }
148
149 pair<int, int> AnalogSignal::v_extents() const
150 {
151         const int ph = pos_vdivs_ * div_height_;
152         const int nh = neg_vdivs_ * div_height_;
153         return make_pair(-ph, nh);
154 }
155
156 int AnalogSignal::scale_handle_offset() const
157 {
158         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
159
160         return ((scale_index_drag_offset_ - scale_index_) * h / 4) - h / 2;
161 }
162
163 void AnalogSignal::scale_handle_dragged(int offset)
164 {
165         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
166
167         scale_index_ = scale_index_drag_offset_ - (offset + h / 2) / (h / 4);
168
169         update_scale();
170 }
171
172 void AnalogSignal::scale_handle_drag_release()
173 {
174         scale_index_drag_offset_ = scale_index_;
175         update_scale();
176 }
177
178 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
179 {
180         if (base_->enabled()) {
181                 Trace::paint_back(p, pp);
182                 paint_axis(p, pp, get_visual_y());
183         }
184 }
185
186 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
187 {
188         assert(base_->analog_data());
189         assert(owner_);
190
191         const int y = get_visual_y();
192
193         if (!base_->enabled())
194                 return;
195
196         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
197                 paint_grid(p, y, pp.left(), pp.right());
198
199                 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
200                         base_->analog_data()->analog_segments();
201                 if (segments.empty())
202                         return;
203
204                 const shared_ptr<pv::data::AnalogSegment> &segment =
205                         segments.front();
206
207                 const double pixels_offset = pp.pixels_offset();
208                 const double samplerate = max(1.0, segment->samplerate());
209                 const pv::util::Timestamp& start_time = segment->start_time();
210                 const int64_t last_sample = segment->get_sample_count() - 1;
211                 const double samples_per_pixel = samplerate * pp.scale();
212                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
213                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
214
215                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
216                         (int64_t)0), last_sample);
217                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
218                         (int64_t)0), last_sample);
219
220                 if (samples_per_pixel < EnvelopeThreshold)
221                         paint_trace(p, segment, y, pp.left(),
222                                 start_sample, end_sample,
223                                 pixels_offset, samples_per_pixel);
224                 else
225                         paint_envelope(p, segment, y, pp.left(),
226                                 start_sample, end_sample,
227                                 pixels_offset, samples_per_pixel);
228         }
229
230         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth)) {
231                 if (((conversion_type_ == data::SignalBase::A2LConversionByTreshold) ||
232                         (conversion_type_ == data::SignalBase::A2LConversionBySchmittTrigger))) {
233
234                         paint_logic_mid(p, pp);
235                 }
236         }
237 }
238
239 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
240 {
241         if (!enabled())
242                 return;
243
244         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
245                 const int y = get_visual_y();
246
247                 // Show the info section on the right side of the trace
248                 const QString infotext = QString("%1 V/div").arg(resolution_);
249
250                 p.setPen(base_->colour());
251                 p.setFont(QApplication::font());
252
253                 const QRectF bounding_rect = QRectF(pp.left(),
254                                 y + v_extents().first,
255                                 pp.width() - InfoTextMarginRight,
256                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
257
258                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
259         }
260 }
261
262 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
263 {
264         p.setRenderHint(QPainter::Antialiasing, false);
265
266         GlobalSettings settings;
267         const bool show_analog_minor_grid =
268                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
269
270         if (pos_vdivs_ > 0) {
271                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
272                 for (int i = 1; i <= pos_vdivs_; i++) {
273                         const float dy = i * div_height_;
274                         p.drawLine(QLineF(left, y - dy, right, y - dy));
275                 }
276         }
277
278         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
279                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
280                 for (int i = 0; i < pos_vdivs_; i++) {
281                         const float dy = i * div_height_;
282                         const float dy25 = dy + (0.25 * div_height_);
283                         const float dy50 = dy + (0.50 * div_height_);
284                         const float dy75 = dy + (0.75 * div_height_);
285                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
286                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
287                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
288                 }
289         }
290
291         if (neg_vdivs_ > 0) {
292                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
293                 for (int i = 1; i <= neg_vdivs_; i++) {
294                         const float dy = i * div_height_;
295                         p.drawLine(QLineF(left, y + dy, right, y + dy));
296                 }
297         }
298
299         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
300                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
301                 for (int i = 0; i < neg_vdivs_; i++) {
302                         const float dy = i * div_height_;
303                         const float dy25 = dy + (0.25 * div_height_);
304                         const float dy50 = dy + (0.50 * div_height_);
305                         const float dy75 = dy + (0.75 * div_height_);
306                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
307                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
308                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
309                 }
310         }
311
312         p.setRenderHint(QPainter::Antialiasing, true);
313 }
314
315 void AnalogSignal::paint_trace(QPainter &p,
316         const shared_ptr<pv::data::AnalogSegment> &segment,
317         int y, int left, const int64_t start, const int64_t end,
318         const double pixels_offset, const double samples_per_pixel)
319 {
320         if (end <= start)
321                 return;
322
323         // Calculate and paint the sampling points if enabled and useful
324         GlobalSettings settings;
325         const bool show_sampling_points =
326                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
327                 (samples_per_pixel < 0.25);
328
329         p.setPen(base_->colour());
330
331         const int64_t points_count = end - start;
332
333         QPointF *points = new QPointF[points_count];
334         QPointF *point = points;
335
336         QRectF *sampling_points = nullptr;
337         if (show_sampling_points)
338                  sampling_points = new QRectF[points_count];
339         QRectF *sampling_point = sampling_points;
340
341         int64_t sample_count = min(points_count, TracePaintBlockSize);
342         int64_t block_sample = 0;
343         const float *sample_block = segment->get_samples(start, start + sample_count);
344
345         const int w = 2;
346         for (int64_t sample = start; sample != end; sample++, block_sample++) {
347
348                 if (block_sample == TracePaintBlockSize) {
349                         block_sample = 0;
350                         delete[] sample_block;
351                         sample_count = min(points_count - sample, TracePaintBlockSize);
352                         sample_block = segment->get_samples(sample, sample + sample_count);
353                 }
354
355                 const float x = (sample / samples_per_pixel -
356                         pixels_offset) + left;
357
358                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
359
360                 if (show_sampling_points)
361                         *sampling_point++ =
362                                 QRectF(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
363         }
364         delete[] sample_block;
365
366         p.drawPolyline(points, points_count);
367
368         if (show_sampling_points) {
369                 p.setPen(SamplingPointColour);
370                 p.drawRects(sampling_points, points_count);
371                 delete[] sampling_points;
372         }
373
374         delete[] points;
375 }
376
377 void AnalogSignal::paint_envelope(QPainter &p,
378         const shared_ptr<pv::data::AnalogSegment> &segment,
379         int y, int left, const int64_t start, const int64_t end,
380         const double pixels_offset, const double samples_per_pixel)
381 {
382         using pv::data::AnalogSegment;
383
384         AnalogSegment::EnvelopeSection e;
385         segment->get_envelope_section(e, start, end, samples_per_pixel);
386
387         if (e.length < 2)
388                 return;
389
390         p.setPen(QPen(Qt::NoPen));
391         p.setBrush(base_->colour());
392
393         QRectF *const rects = new QRectF[e.length];
394         QRectF *rect = rects;
395
396         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
397                 const float x = ((e.scale * sample + e.start) /
398                         samples_per_pixel - pixels_offset) + left;
399                 const AnalogSegment::EnvelopeSample *const s =
400                         e.samples + sample;
401
402                 // We overlap this sample with the next so that vertical
403                 // gaps do not appear during steep rising or falling edges
404                 const float b = y - max(s->max, (s + 1)->min) * scale_;
405                 const float t = y - min(s->min, (s + 1)->max) * scale_;
406
407                 float h = b - t;
408                 if (h >= 0.0f && h <= 1.0f)
409                         h = 1.0f;
410                 if (h <= 0.0f && h >= -1.0f)
411                         h = -1.0f;
412
413                 *rect++ = QRectF(x, t, 1.0f, h);
414         }
415
416         p.drawRects(rects, e.length);
417
418         delete[] rects;
419         delete[] e.samples;
420 }
421
422 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
423 {
424         QLineF *line;
425
426         vector< pair<int64_t, bool> > edges;
427
428         assert(base_);
429
430         const int y = get_visual_y();
431
432         if (!base_->enabled() || !base_->logic_data())
433                 return;
434
435         const int signal_margin =
436                 QFontMetrics(QApplication::font()).height() / 2;
437
438         const int ph = min(pos_vdivs_, 1) * div_height_;
439         const int nh = min(neg_vdivs_, 1) * div_height_;
440         const float high_offset = y - ph + signal_margin + 0.5f;
441         const float low_offset = y + nh - signal_margin - 0.5f;
442
443         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
444                 base_->logic_data()->logic_segments();
445
446         if (segments.empty())
447                 return;
448
449         const shared_ptr<pv::data::LogicSegment> &segment =
450                 segments.front();
451
452         double samplerate = segment->samplerate();
453
454         // Show sample rate as 1Hz when it is unknown
455         if (samplerate == 0.0)
456                 samplerate = 1.0;
457
458         const double pixels_offset = pp.pixels_offset();
459         const pv::util::Timestamp& start_time = segment->start_time();
460         const int64_t last_sample = segment->get_sample_count() - 1;
461         const double samples_per_pixel = samplerate * pp.scale();
462         const double pixels_per_sample = 1 / samples_per_pixel;
463         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
464         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
465
466         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
467                 (int64_t)0), last_sample);
468         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
469                 (int64_t)0), last_sample);
470
471         segment->get_subsampled_edges(edges, start_sample, end_sample,
472                 samples_per_pixel / LogicSignal::Oversampling, 0);
473         assert(edges.size() >= 2);
474
475         // Check whether we need to paint the sampling points
476         GlobalSettings settings;
477         const bool show_sampling_points =
478                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
479                 (samples_per_pixel < 0.25);
480
481         vector<QRectF> sampling_points;
482         float sampling_point_x = 0.0f;
483         int64_t sampling_point_sample = start_sample;
484         const int w = 2;
485
486         if (show_sampling_points) {
487                 sampling_points.reserve(end_sample - start_sample + 1);
488                 sampling_point_x = (edges.cbegin()->first / samples_per_pixel - pixels_offset) + pp.left();
489         }
490
491         // Paint the edges
492         const unsigned int edge_count = edges.size() - 2;
493         QLineF *const edge_lines = new QLineF[edge_count];
494         line = edge_lines;
495
496         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
497                 const float x = ((*i).first / samples_per_pixel -
498                         pixels_offset) + pp.left();
499                 *line++ = QLineF(x, high_offset, x, low_offset);
500
501                 if (show_sampling_points)
502                         while (sampling_point_sample < (*i).first) {
503                                 const float y = (*i).second ? low_offset : high_offset;
504                                 sampling_points.emplace_back(
505                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
506                                 sampling_point_sample++;
507                                 sampling_point_x += pixels_per_sample;
508                         };
509         }
510
511         // Calculate the sample points from the last edge to the end of the trace
512         if (show_sampling_points)
513                 while ((uint64_t)sampling_point_sample <= end_sample) {
514                         // Signal changed after the last edge, so the level is inverted
515                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
516                         sampling_points.emplace_back(
517                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
518                         sampling_point_sample++;
519                         sampling_point_x += pixels_per_sample;
520                 };
521
522         p.setPen(LogicSignal::EdgeColour);
523         p.drawLines(edge_lines, edge_count);
524         delete[] edge_lines;
525
526         // Paint the caps
527         const unsigned int max_cap_line_count = edges.size();
528         QLineF *const cap_lines = new QLineF[max_cap_line_count];
529
530         p.setPen(LogicSignal::HighColour);
531         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
532                 pixels_offset, pp.left(), high_offset);
533         p.setPen(LogicSignal::LowColour);
534         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
535                 pixels_offset, pp.left(), low_offset);
536
537         delete[] cap_lines;
538
539         // Paint the sampling points
540         if (show_sampling_points) {
541                 p.setPen(SamplingPointColour);
542                 p.drawRects(sampling_points.data(), sampling_points.size());
543         }
544 }
545
546 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
547         vector< pair<int64_t, bool> > &edges, bool level,
548         double samples_per_pixel, double pixels_offset, float x_offset,
549         float y_offset)
550 {
551         QLineF *line = lines;
552
553         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
554                 if ((*i).second == level) {
555                         *line++ = QLineF(
556                                 ((*i).first / samples_per_pixel -
557                                         pixels_offset) + x_offset, y_offset,
558                                 ((*(i+1)).first / samples_per_pixel -
559                                         pixels_offset) + x_offset, y_offset);
560                 }
561
562         p.drawLines(lines, line - lines);
563 }
564
565 float AnalogSignal::get_resolution(int scale_index)
566 {
567         const float seq[] = {1.0f, 2.0f, 5.0f};
568
569         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
570         const div_t d = div((int)(scale_index + countof(seq) * offset),
571                 countof(seq));
572
573         return powf(10.0f, d.quot - offset) * seq[d.rem];
574 }
575
576 void AnalogSignal::update_scale()
577 {
578         resolution_ = get_resolution(scale_index_);
579         scale_ = div_height_ / resolution_;
580 }
581
582 void AnalogSignal::update_conversion_type()
583 {
584         base_->set_conversion_type(conversion_type_);
585
586         if (owner_)
587                 owner_->row_item_appearance_changed(false, true);
588 }
589
590 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
591 {
592         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
593                 base_->analog_data()->analog_segments();
594
595         if (segments.empty())
596                 return;
597
598         static double prev_min = 0, prev_max = 0;
599         double min = 0, max = 0;
600
601         for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
602                 pair<double, double> mm = segment->get_min_max();
603                 min = std::min(min, mm.first);
604                 max = std::max(max, mm.second);
605         }
606
607         if ((min == prev_min) && (max == prev_max) && !force_update)
608                 return;
609
610         prev_min = min;
611         prev_max = max;
612
613         // If we're allowed to alter the div assignment...
614         if (!keep_divs) {
615                 // Use all divs for the positive range if there are no negative values
616                 if ((min == 0) && (neg_vdivs_ > 0)) {
617                         pos_vdivs_ += neg_vdivs_;
618                         neg_vdivs_ = 0;
619                 }
620
621                 // Split up the divs if there are negative values but no negative divs
622                 if ((min < 0) && (neg_vdivs_ == 0)) {
623                         neg_vdivs_ = pos_vdivs_ / 2;
624                         pos_vdivs_ -= neg_vdivs_;
625                 }
626         }
627
628         // If there is still no positive div when we need it, add one
629         // (this can happen when pos_vdivs==neg_vdivs==0)
630         if ((max > 0) && (pos_vdivs_ == 0)) {
631                 pos_vdivs_ = 1;
632                 owner_->extents_changed(false, true);
633         }
634
635         // If there is still no negative div when we need it, add one
636         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
637         if ((min < 0) && (neg_vdivs_ == 0)) {
638                 neg_vdivs_ = 1;
639                 owner_->extents_changed(false, true);
640         }
641
642         double min_value_per_div;
643         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
644                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
645         else if (pos_vdivs_ > 0)
646                 min_value_per_div = max / pos_vdivs_;
647         else
648                 min_value_per_div = -min / neg_vdivs_;
649
650         // Find first scale value that is bigger than the value we need
651         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
652                 if (get_resolution(i) > min_value_per_div) {
653                         scale_index_ = i;
654                         break;
655                 }
656
657         update_scale();
658 }
659
660 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
661 {
662         // Add the standard options
663         Signal::populate_popup_form(parent, form);
664
665         QFormLayout *const layout = new QFormLayout;
666
667         // Add the number of vdivs
668         pvdiv_sb_ = new QSpinBox(parent);
669         pvdiv_sb_->setRange(0, MaximumVDivs);
670         pvdiv_sb_->setValue(pos_vdivs_);
671         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
672                 this, SLOT(on_pos_vdivs_changed(int)));
673         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
674
675         nvdiv_sb_ = new QSpinBox(parent);
676         nvdiv_sb_->setRange(0, MaximumVDivs);
677         nvdiv_sb_->setValue(neg_vdivs_);
678         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
679                 this, SLOT(on_neg_vdivs_changed(int)));
680         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
681
682         // Add the vertical resolution
683         resolution_cb_ = new QComboBox(parent);
684
685         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
686                 const QString label = QString("%1").arg(get_resolution(i));
687                 resolution_cb_->insertItem(0, label, QVariant(i));
688         }
689
690         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
691         resolution_cb_->setCurrentIndex(cur_idx);
692
693         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
694                 this, SLOT(on_resolution_changed(int)));
695
696         QGridLayout *const vdiv_layout = new QGridLayout;
697         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
698         vdiv_layout->addWidget(resolution_cb_, 0, 0);
699         vdiv_layout->addWidget(vdiv_unit, 0, 1);
700
701         layout->addRow(tr("Vertical resolution"), vdiv_layout);
702
703         // Add the autoranging checkbox
704         QCheckBox* autoranging_cb = new QCheckBox();
705         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
706
707         connect(autoranging_cb, SIGNAL(stateChanged(int)),
708                 this, SLOT(on_autoranging_changed(int)));
709
710         layout->addRow(tr("Autoranging"), autoranging_cb);
711
712         // Add the conversion type dropdown
713         conversion_cb_ = new QComboBox();
714
715         conversion_cb_->addItem("none", data::SignalBase::NoConversion);
716         conversion_cb_->addItem("to logic via threshold", data::SignalBase::A2LConversionByTreshold);
717         conversion_cb_->addItem("to logic via schmitt-trigger", data::SignalBase::A2LConversionBySchmittTrigger);
718
719         cur_idx = conversion_cb_->findData(QVariant(conversion_type_));
720         conversion_cb_->setCurrentIndex(cur_idx);
721
722 //      layout->addRow(tr("Conversion"), conversion_cb_);
723
724         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
725                 this, SLOT(on_conversion_changed(int)));
726
727         // Add the display type dropdown
728         display_type_cb_ = new QComboBox();
729
730         display_type_cb_->addItem(tr("Analog"), DisplayAnalog);
731         display_type_cb_->addItem(tr("Converted"), DisplayConverted);
732         display_type_cb_->addItem(tr("Both"), DisplayBoth);
733
734         cur_idx = display_type_cb_->findData(QVariant(display_type_));
735         display_type_cb_->setCurrentIndex(cur_idx);
736
737 //      layout->addRow(tr("Traces to show:"), display_type_cb_);
738
739         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
740                 this, SLOT(on_display_type_changed(int)));
741
742         form->addRow(layout);
743 }
744
745 void AnalogSignal::on_samples_added()
746 {
747         perform_autoranging(false, false);
748 }
749
750 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
751 {
752         if (vdivs == pos_vdivs_)
753                 return;
754
755         pos_vdivs_ = vdivs;
756
757         // There has to be at least one div, positive or negative
758         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
759                 pos_vdivs_ = 1;
760                 if (pvdiv_sb_)
761                         pvdiv_sb_->setValue(pos_vdivs_);
762         }
763
764         if (autoranging_) {
765                 perform_autoranging(true, true);
766
767                 // It could be that a positive or negative div was added, so update
768                 if (pvdiv_sb_) {
769                         pvdiv_sb_->setValue(pos_vdivs_);
770                         nvdiv_sb_->setValue(neg_vdivs_);
771                 }
772         }
773
774         if (owner_) {
775                 // Call order is important, otherwise the lazy event handler won't work
776                 owner_->extents_changed(false, true);
777                 owner_->row_item_appearance_changed(false, true);
778         }
779 }
780
781 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
782 {
783         if (vdivs == neg_vdivs_)
784                 return;
785
786         neg_vdivs_ = vdivs;
787
788         // There has to be at least one div, positive or negative
789         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
790                 pos_vdivs_ = 1;
791                 if (pvdiv_sb_)
792                         pvdiv_sb_->setValue(pos_vdivs_);
793         }
794
795         if (autoranging_) {
796                 perform_autoranging(true, true);
797
798                 // It could be that a positive or negative div was added, so update
799                 if (pvdiv_sb_) {
800                         pvdiv_sb_->setValue(pos_vdivs_);
801                         nvdiv_sb_->setValue(neg_vdivs_);
802                 }
803         }
804
805         if (owner_) {
806                 // Call order is important, otherwise the lazy event handler won't work
807                 owner_->extents_changed(false, true);
808                 owner_->row_item_appearance_changed(false, true);
809         }
810 }
811
812 void AnalogSignal::on_resolution_changed(int index)
813 {
814         scale_index_ = resolution_cb_->itemData(index).toInt();
815         update_scale();
816
817         if (owner_)
818                 owner_->row_item_appearance_changed(false, true);
819 }
820
821 void AnalogSignal::on_autoranging_changed(int state)
822 {
823         autoranging_ = (state == Qt::Checked);
824
825         if (autoranging_)
826                 perform_autoranging(false, true);
827
828         if (owner_) {
829                 // Call order is important, otherwise the lazy event handler won't work
830                 owner_->extents_changed(false, true);
831                 owner_->row_item_appearance_changed(false, true);
832         }
833 }
834
835 void AnalogSignal::on_conversion_changed(int index)
836 {
837         data::SignalBase::ConversionType old_conv_type = conversion_type_;
838
839         conversion_type_ = (data::SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
840
841         if (conversion_type_ != old_conv_type) {
842                 base_->set_conversion_type(conversion_type_);
843                 update_conversion_type();
844         }
845 }
846
847 void AnalogSignal::on_display_type_changed(int index)
848 {
849         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
850
851         if (owner_)
852                 owner_->row_item_appearance_changed(false, true);
853 }
854
855 } // namespace TraceView
856 } // namespace views
857 } // namespace pv