]> sigrok.org Git - pulseview.git/blobdiff - pv/views/trace/analogsignal.cpp
Fix the build - catch exceptions by reference
[pulseview.git] / pv / views / trace / analogsignal.cpp
index 41c1fba4028f34f53df04f5e970cbdd166e467b0..0994d92ed0eba4e30484abc79af17f8fec9512b0 100644 (file)
@@ -28,6 +28,7 @@
 #include <QApplication>
 #include <QCheckBox>
 #include <QComboBox>
+#include <QDebug>
 #include <QFormLayout>
 #include <QGridLayout>
 #include <QLabel>
@@ -37,6 +38,7 @@
 #include "logicsignal.hpp"
 #include "view.hpp"
 
+#include "pv/util.hpp"
 #include "pv/data/analog.hpp"
 #include "pv/data/analogsegment.hpp"
 #include "pv/data/logic.hpp"
 using std::deque;
 using std::div;
 using std::div_t;
+// Note that "using std::isnan;" is _not_ put here since that would break
+// compilation on some platforms. Use "std::isnan()" instead in checks below.
 using std::max;
 using std::make_pair;
 using std::min;
 using std::numeric_limits;
+using std::out_of_range;
 using std::pair;
 using std::shared_ptr;
 using std::vector;
 
+using pv::data::SignalBase;
+using pv::util::SIPrefix;
+
 namespace pv {
 namespace views {
 namespace trace {
 
-const QColor AnalogSignal::SignalColours[4] = {
+const QColor AnalogSignal::SignalColors[4] = {
        QColor(0xC4, 0xA0, 0x00),       // Yellow
        QColor(0x87, 0x20, 0x7A),       // Magenta
        QColor(0x20, 0x4A, 0x87),       // Blue
        QColor(0x4E, 0x9A, 0x06)        // Green
 };
 
+const QPen AnalogSignal::AxisPen(QColor(0, 0, 0, 30 * 256 / 100), 2);
 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
 
-const QColor AnalogSignal::SamplingPointColour(0x77, 0x77, 0x77);
+const QColor AnalogSignal::SamplingPointColor(0x77, 0x77, 0x77);
+const QColor AnalogSignal::SamplingPointColorLo = QColor(200, 0, 0, 80 * 256 / 100);
+const QColor AnalogSignal::SamplingPointColorNe = QColor(0,   0, 0, 80 * 256 / 100);
+const QColor AnalogSignal::SamplingPointColorHi = QColor(0, 200, 0, 80 * 256 / 100);
+
+const QColor AnalogSignal::ThresholdColor = QColor(0, 0, 0, 30 * 256 / 100);
+const QColor AnalogSignal::ThresholdColorLo = QColor(255, 0, 0, 8 * 256 / 100);
+const QColor AnalogSignal::ThresholdColorNe = QColor(0,   0, 0, 10 * 256 / 100);
+const QColor AnalogSignal::ThresholdColorHi = QColor(0, 255, 0, 8 * 256 / 100);
 
 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
 const float AnalogSignal::EnvelopeThreshold = 64.0f;
@@ -88,28 +105,27 @@ AnalogSignal::AnalogSignal(
        shared_ptr<data::SignalBase> base) :
        Signal(session, base),
        scale_index_(4), // 20 per div
-       scale_index_drag_offset_(0),
        pos_vdivs_(1),
        neg_vdivs_(1),
        resolution_(0),
        display_type_(DisplayBoth),
        autoranging_(true)
 {
+       axis_pen_ = AxisPen;
+
        pv::data::Analog* analog_data =
                dynamic_cast<pv::data::Analog*>(data().get());
 
-       connect(analog_data, SIGNAL(samples_added(QObject*, uint64_t, uint64_t)),
-               this, SLOT(on_samples_added()));
-
-       connect(&delayed_conversion_starter_, SIGNAL(timeout()),
-               this, SLOT(on_delayed_conversion_starter()));
-       delayed_conversion_starter_.setSingleShot(true);
-       delayed_conversion_starter_.setInterval(1000);  // 1s timeout
+       connect(analog_data, SIGNAL(min_max_changed(float, float)),
+               this, SLOT(on_min_max_changed(float, float)));
 
        GlobalSettings gs;
+       conversion_threshold_disp_mode_ =
+               gs.value(GlobalSettings::Key_View_ConversionThresholdDispMode).toInt();
+
        div_height_ = gs.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
 
-       base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]);
+       base_->set_color(SignalColors[base_->index() % countof(SignalColors)]);
        update_scale();
 }
 
@@ -166,31 +182,58 @@ pair<int, int> AnalogSignal::v_extents() const
        return make_pair(-ph, nh);
 }
 
-int AnalogSignal::scale_handle_offset() const
+void AnalogSignal::on_setting_changed(const QString &key, const QVariant &value)
 {
-       const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
+       Signal::on_setting_changed(key, value);
 
-       return ((scale_index_drag_offset_ - scale_index_) * h / 4) - h / 2;
+       if (key == GlobalSettings::Key_View_ConversionThresholdDispMode)
+               on_settingViewConversionThresholdDispMode_changed(value);
 }
 
-void AnalogSignal::scale_handle_dragged(int offset)
+void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
 {
-       const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
-
-       scale_index_ = scale_index_drag_offset_ - (offset + h / 2) / (h / 4);
-
-       update_scale();
-}
+       if (!base_->enabled())
+               return;
 
-void AnalogSignal::scale_handle_drag_release()
-{
-       scale_index_drag_offset_ = scale_index_;
-       update_scale();
-}
+       bool paint_thr_bg =
+               conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Background;
+
+       const vector<double> thresholds = base_->get_conversion_thresholds();
+
+       // Only display thresholds if we have some and we show analog samples
+       if ((thresholds.size() > 0) && paint_thr_bg &&
+               ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))) {
+
+               const int visual_y = get_visual_y();
+               const pair<int, int> extents = v_extents();
+               const int top = visual_y + extents.first;
+               const int btm = visual_y + extents.second;
+
+               // Draw high/neutral/low areas
+               if (thresholds.size() == 2) {
+                       int thr_lo = visual_y - thresholds[0] * scale_;
+                       int thr_hi = visual_y - thresholds[1] * scale_;
+                       thr_lo = min(max(thr_lo, top), btm);
+                       thr_hi = min(max(thr_hi, top), btm);
+
+                       p.fillRect(QRectF(pp.left(), top, pp.width(), thr_hi - top),
+                               QBrush(ThresholdColorHi));
+                       p.fillRect(QRectF(pp.left(), thr_hi, pp.width(), thr_lo - thr_hi),
+                               QBrush(ThresholdColorNe));
+                       p.fillRect(QRectF(pp.left(), thr_lo, pp.width(), btm - thr_lo),
+                               QBrush(ThresholdColorLo));
+               } else {
+                       int thr = visual_y - thresholds[0] * scale_;
+                       thr = min(max(thr, top), btm);
+
+                       p.fillRect(QRectF(pp.left(), top, pp.width(), thr - top),
+                               QBrush(ThresholdColorHi));
+                       p.fillRect(QRectF(pp.left(), thr, pp.width(), btm - thr),
+                               QBrush(ThresholdColorLo));
+               }
 
-void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
-{
-       if (base_->enabled()) {
+               paint_axis(p, pp, get_visual_y());
+       } else {
                Trace::paint_back(p, pp);
                paint_axis(p, pp, get_visual_y());
        }
@@ -209,18 +252,14 @@ void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
        if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
                paint_grid(p, y, pp.left(), pp.right());
 
-               const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
-                       base_->analog_data()->analog_segments();
-               if (segments.empty())
+               shared_ptr<pv::data::AnalogSegment> segment = get_analog_segment_to_paint();
+               if (!segment || (segment->get_sample_count() == 0))
                        return;
 
-               const shared_ptr<pv::data::AnalogSegment> &segment =
-                       segments.front();
-
                const double pixels_offset = pp.pixels_offset();
                const double samplerate = max(1.0, segment->samplerate());
                const pv::util::Timestamp& start_time = segment->start_time();
-               const int64_t last_sample = segment->get_sample_count() - 1;
+               const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
                const double samples_per_pixel = samplerate * pp.scale();
                const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
                const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
@@ -231,25 +270,15 @@ void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
                        (int64_t)0), last_sample);
 
                if (samples_per_pixel < EnvelopeThreshold)
-                       paint_trace(p, segment, y, pp.left(),
-                               start_sample, end_sample,
+                       paint_trace(p, segment, y, pp.left(), start_sample, end_sample,
                                pixels_offset, samples_per_pixel);
                else
-                       paint_envelope(p, segment, y, pp.left(),
-                               start_sample, end_sample,
+                       paint_envelope(p, segment, y, pp.left(), start_sample, end_sample,
                                pixels_offset, samples_per_pixel);
        }
 
-       if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth)) {
-               const data::SignalBase::ConversionType conv_type =
-                       base_->get_conversion_type();
-
-               if (((conv_type == data::SignalBase::A2LConversionByTreshold) ||
-                       (conv_type == data::SignalBase::A2LConversionBySchmittTrigger))) {
-
-                       paint_logic_mid(p, pp);
-               }
-       }
+       if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
+               paint_logic_mid(p, pp);
 }
 
 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
@@ -260,10 +289,19 @@ void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
        if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
                const int y = get_visual_y();
 
-               // Show the info section on the right side of the trace
-               const QString infotext = QString("%1 V/div").arg(resolution_);
+               QString infotext;
+
+               // Show the info section on the right side of the trace, including
+               // the value at the hover point when the hover marker is enabled
+               // and we have corresponding data available
+               if (show_hover_marker_ && !std::isnan(value_at_hover_pos_)) {
+                       infotext = QString("[%1] %2 V/div")
+                               .arg(format_value_si(value_at_hover_pos_, SIPrefix::unspecified, 0, "V", false))
+                               .arg(resolution_);
+               } else
+                       infotext = QString("%1 V/div").arg(resolution_);
 
-               p.setPen(base_->colour());
+               p.setPen(base_->color());
                p.setFont(QApplication::font());
 
                const QRectF bounding_rect = QRectF(pp.left(),
@@ -273,6 +311,9 @@ void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 
                p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
        }
+
+       if (show_hover_marker_)
+               paint_hover_marker(p);
 }
 
 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
@@ -336,55 +377,90 @@ void AnalogSignal::paint_trace(QPainter &p,
        if (end <= start)
                return;
 
+       bool paint_thr_dots =
+               (base_->get_conversion_type() != data::SignalBase::NoConversion) &&
+               (conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Dots);
+
+       vector<double> thresholds;
+       if (paint_thr_dots)
+               thresholds = base_->get_conversion_thresholds();
+
        // Calculate and paint the sampling points if enabled and useful
        GlobalSettings settings;
        const bool show_sampling_points =
-               settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
-               (samples_per_pixel < 0.25);
+               (settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() ||
+               paint_thr_dots) && (samples_per_pixel < 0.25);
 
-       p.setPen(base_->colour());
+       p.setPen(base_->color());
 
-       const int64_t points_count = end - start;
+       const int64_t points_count = end - start + 1;
 
        QPointF *points = new QPointF[points_count];
        QPointF *point = points;
 
-       QRectF *sampling_points = nullptr;
-       if (show_sampling_points)
-                sampling_points = new QRectF[points_count];
-       QRectF *sampling_point = sampling_points;
+       vector<QRectF> sampling_points[3];
 
        int64_t sample_count = min(points_count, TracePaintBlockSize);
        int64_t block_sample = 0;
        float *sample_block = new float[TracePaintBlockSize];
        segment->get_samples(start, start + sample_count, sample_block);
 
+       if (show_hover_marker_)
+               reset_pixel_values();
+
        const int w = 2;
-       for (int64_t sample = start; sample != end; sample++, block_sample++) {
+       for (int64_t sample = start; sample <= end; sample++, block_sample++) {
 
+               // Fetch next block of samples if we finished the current one
                if (block_sample == TracePaintBlockSize) {
                        block_sample = 0;
                        sample_count = min(points_count - sample, TracePaintBlockSize);
                        segment->get_samples(sample, sample + sample_count, sample_block);
                }
 
-               const float x = (sample / samples_per_pixel -
-                       pixels_offset) + left;
+               const float abs_x = sample / samples_per_pixel - pixels_offset;
+               const float x = left + abs_x;
 
                *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 
-               if (show_sampling_points)
-                       *sampling_point++ =
-                               QRectF(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
+               // Generate the pixel<->value lookup table for the mouse hover
+               if (show_hover_marker_)
+                       process_next_sample_value(abs_x, sample_block[block_sample]);
+
+               // Create the sampling points if needed
+               if (show_sampling_points) {
+                       int idx = 0;  // Neutral
+
+                       if (paint_thr_dots) {
+                               if (thresholds.size() == 1)
+                                       idx = (sample_block[block_sample] >= thresholds[0]) ? 2 : 1;
+                               else if (thresholds.size() == 2) {
+                                       if (sample_block[block_sample] > thresholds[1])
+                                               idx = 2;  // High
+                                       else if (sample_block[block_sample] < thresholds[0])
+                                               idx = 1;  // Low
+                               }
+                       }
+
+                       sampling_points[idx].emplace_back(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
+               }
        }
        delete[] sample_block;
 
        p.drawPolyline(points, points_count);
 
        if (show_sampling_points) {
-               p.setPen(SamplingPointColour);
-               p.drawRects(sampling_points, points_count);
-               delete[] sampling_points;
+               if (paint_thr_dots) {
+                       p.setPen(SamplingPointColorNe);
+                       p.drawRects(sampling_points[0].data(), sampling_points[0].size());
+                       p.setPen(SamplingPointColorLo);
+                       p.drawRects(sampling_points[1].data(), sampling_points[1].size());
+                       p.setPen(SamplingPointColorHi);
+                       p.drawRects(sampling_points[2].data(), sampling_points[2].size());
+               } else {
+                       p.setPen(SamplingPointColor);
+                       p.drawRects(sampling_points[0].data(), sampling_points[0].size());
+               }
        }
 
        delete[] points;
@@ -397,6 +473,10 @@ void AnalogSignal::paint_envelope(QPainter &p,
 {
        using pv::data::AnalogSegment;
 
+       // Note: Envelope painting currently doesn't generate a pixel<->value lookup table
+       if (show_hover_marker_)
+               reset_pixel_values();
+
        AnalogSegment::EnvelopeSection e;
        segment->get_envelope_section(e, start, end, samples_per_pixel);
 
@@ -404,7 +484,7 @@ void AnalogSignal::paint_envelope(QPainter &p,
                return;
 
        p.setPen(QPen(Qt::NoPen));
-       p.setBrush(base_->colour());
+       p.setBrush(base_->color());
 
        QRectF *const rects = new QRectF[e.length];
        QRectF *rect = rects;
@@ -412,8 +492,8 @@ void AnalogSignal::paint_envelope(QPainter &p,
        for (uint64_t sample = 0; sample < e.length - 1; sample++) {
                const float x = ((e.scale * sample + e.start) /
                        samples_per_pixel - pixels_offset) + left;
-               const AnalogSegment::EnvelopeSample *const s =
-                       e.samples + sample;
+
+               const AnalogSegment::EnvelopeSample *const s = e.samples + sample;
 
                // We overlap this sample with the next so that vertical
                // gaps do not appear during steep rising or falling edges
@@ -456,15 +536,10 @@ void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
        const float high_offset = y - ph + signal_margin + 0.5f;
        const float low_offset = y + nh - signal_margin - 0.5f;
 
-       const deque< shared_ptr<pv::data::LogicSegment> > &segments =
-               base_->logic_data()->logic_segments();
-
-       if (segments.empty())
+       shared_ptr<pv::data::LogicSegment> segment = get_logic_segment_to_paint();
+       if (!segment || (segment->get_sample_count() == 0))
                return;
 
-       const shared_ptr<pv::data::LogicSegment> &segment =
-               segments.front();
-
        double samplerate = segment->samplerate();
 
        // Show sample rate as 1Hz when it is unknown
@@ -473,7 +548,7 @@ void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 
        const double pixels_offset = pp.pixels_offset();
        const pv::util::Timestamp& start_time = segment->start_time();
-       const int64_t last_sample = segment->get_sample_count() - 1;
+       const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
        const double samples_per_pixel = samplerate * pp.scale();
        const double pixels_per_sample = 1 / samples_per_pixel;
        const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
@@ -535,7 +610,7 @@ void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
                        sampling_point_x += pixels_per_sample;
                };
 
-       p.setPen(LogicSignal::EdgeColour);
+       p.setPen(LogicSignal::EdgeColor);
        p.drawLines(edge_lines, edge_count);
        delete[] edge_lines;
 
@@ -543,10 +618,10 @@ void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
        const unsigned int max_cap_line_count = edges.size();
        QLineF *const cap_lines = new QLineF[max_cap_line_count];
 
-       p.setPen(LogicSignal::HighColour);
+       p.setPen(LogicSignal::HighColor);
        paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
                pixels_offset, pp.left(), high_offset);
-       p.setPen(LogicSignal::LowColour);
+       p.setPen(LogicSignal::LowColor);
        paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
                pixels_offset, pp.left(), low_offset);
 
@@ -554,7 +629,7 @@ void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 
        // Paint the sampling points
        if (show_sampling_points) {
-               p.setPen(SamplingPointColour);
+               p.setPen(SamplingPointColor);
                p.drawRects(sampling_points.data(), sampling_points.size());
        }
 }
@@ -578,6 +653,54 @@ void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
        p.drawLines(lines, line - lines);
 }
 
+shared_ptr<pv::data::AnalogSegment> AnalogSignal::get_analog_segment_to_paint() const
+{
+       shared_ptr<pv::data::AnalogSegment> segment;
+
+       const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
+               base_->analog_data()->analog_segments();
+
+       if (!segments.empty()) {
+               if (segment_display_mode_ == ShowLastSegmentOnly)
+                       segment = segments.back();
+
+               if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
+                               (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
+                       try {
+                               segment = segments.at(current_segment_);
+                       } catch (out_of_range&) {
+                               qDebug() << "Current analog segment out of range for signal" << base_->name() << ":" << current_segment_;
+                       }
+               }
+       }
+
+       return segment;
+}
+
+shared_ptr<pv::data::LogicSegment> AnalogSignal::get_logic_segment_to_paint() const
+{
+       shared_ptr<pv::data::LogicSegment> segment;
+
+       const deque< shared_ptr<pv::data::LogicSegment> > &segments =
+               base_->logic_data()->logic_segments();
+
+       if (!segments.empty()) {
+               if (segment_display_mode_ == ShowLastSegmentOnly)
+                       segment = segments.back();
+
+               if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
+                               (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
+                       try {
+                               segment = segments.at(current_segment_);
+                       } catch (out_of_range&) {
+                               qDebug() << "Current logic segment out of range for signal" << base_->name() << ":" << current_segment_;
+                       }
+               }
+       }
+
+       return segment;
+}
+
 float AnalogSignal::get_resolution(int scale_index)
 {
        const float seq[] = {1.0f, 2.0f, 5.0f};
@@ -597,11 +720,11 @@ void AnalogSignal::update_scale()
 
 void AnalogSignal::update_conversion_widgets()
 {
-       data::SignalBase::ConversionType conv_type = base_->get_conversion_type();
+       SignalBase::ConversionType conv_type = base_->get_conversion_type();
 
        // Enable or disable widgets depending on conversion state
-       conv_threshold_cb_->setEnabled(conv_type != data::SignalBase::NoConversion);
-       display_type_cb_->setEnabled(conv_type != data::SignalBase::NoConversion);
+       conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
+       display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 
        conv_threshold_cb_->clear();
 
@@ -617,16 +740,16 @@ void AnalogSignal::update_conversion_widgets()
 
        map < QString, QVariant > options = base_->get_conversion_options();
 
-       if (conv_type == data::SignalBase::A2LConversionByTreshold) {
+       if (conv_type == SignalBase::A2LConversionByThreshold) {
                const vector<double> thresholds = base_->get_conversion_thresholds(
-                               data::SignalBase::A2LConversionByTreshold, true);
+                               SignalBase::A2LConversionByThreshold, true);
                conv_threshold_cb_->addItem(
                                QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
        }
 
-       if (conv_type == data::SignalBase::A2LConversionBySchmittTrigger) {
+       if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
                const vector<double> thresholds = base_->get_conversion_thresholds(
-                               data::SignalBase::A2LConversionBySchmittTrigger, true);
+                               SignalBase::A2LConversionBySchmittTrigger, true);
                conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
                                QString::number(thresholds[0], 'f', 1),
                                QString::number(thresholds[1], 'f', 1)), -1);
@@ -709,6 +832,64 @@ void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
        update_scale();
 }
 
+void AnalogSignal::reset_pixel_values()
+{
+       value_at_pixel_pos_.clear();
+       current_pixel_pos_ = -1;
+       prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
+}
+
+void AnalogSignal::process_next_sample_value(float x, float value)
+{
+       // Note: NAN is used to indicate the non-existance of a value at this pixel
+
+       if (std::isnan(prev_value_at_pixel_)) {
+               if (x < 0) {
+                       min_value_at_pixel_ = value;
+                       max_value_at_pixel_ = value;
+                       prev_value_at_pixel_ = value;
+                       current_pixel_pos_ = x;
+               } else
+                       prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
+       }
+
+       const int pixel_pos = (int)(x + 0.5);
+
+       if (pixel_pos > current_pixel_pos_) {
+               if (pixel_pos - current_pixel_pos_ == 1) {
+                       if (std::isnan(prev_value_at_pixel_)) {
+                               value_at_pixel_pos_.push_back(prev_value_at_pixel_);
+                       } else {
+                               // Average the min/max range to create one value for the previous pixel
+                               const float avg = (min_value_at_pixel_ + max_value_at_pixel_) / 2;
+                               value_at_pixel_pos_.push_back(avg);
+                       }
+               } else {
+                       // Interpolate values to create values for the intermediate pixels
+                       const float start_value = prev_value_at_pixel_;
+                       const float end_value = value;
+                       const int steps = fabs(pixel_pos - current_pixel_pos_);
+                       const double gradient = (end_value - start_value) / steps;
+                       for (int i = 0; i < steps; i++) {
+                               if (current_pixel_pos_ + i < 0)
+                                       continue;
+                               value_at_pixel_pos_.push_back(start_value + i * gradient);
+                       }
+               }
+
+               min_value_at_pixel_ = value;
+               max_value_at_pixel_ = value;
+               prev_value_at_pixel_ = value;
+               current_pixel_pos_ = pixel_pos;
+       } else {
+               // Another sample for the same pixel
+               if (value < min_value_at_pixel_)
+                       min_value_at_pixel_ = value;
+               if (value > max_value_at_pixel_)
+                       max_value_at_pixel_ = value;
+       }
+}
+
 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 {
        // Add the standard options
@@ -773,9 +954,12 @@ void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
        // Add the conversion type dropdown
        conversion_cb_ = new QComboBox();
 
-       conversion_cb_->addItem("none", data::SignalBase::NoConversion);
-       conversion_cb_->addItem("to logic via threshold", data::SignalBase::A2LConversionByTreshold);
-       conversion_cb_->addItem("to logic via schmitt-trigger", data::SignalBase::A2LConversionBySchmittTrigger);
+       conversion_cb_->addItem(tr("none"),
+               SignalBase::NoConversion);
+       conversion_cb_->addItem(tr("to logic via threshold"),
+               SignalBase::A2LConversionByThreshold);
+       conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
+               SignalBase::A2LConversionBySchmittTrigger);
 
        cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
        conversion_cb_->setCurrentIndex(cur_idx);
@@ -793,20 +977,20 @@ void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 
     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
             this, SLOT(on_conv_threshold_changed(int)));
-    connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString)),
+    connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString&)),
             this, SLOT(on_conv_threshold_changed()));  // index will be -1
 
        // Add the display type dropdown
        display_type_cb_ = new QComboBox();
 
-       display_type_cb_->addItem(tr("Analog"), DisplayAnalog);
-       display_type_cb_->addItem(tr("Converted"), DisplayConverted);
-       display_type_cb_->addItem(tr("Analog+Converted"), DisplayBoth);
+       display_type_cb_->addItem(tr("analog"), DisplayAnalog);
+       display_type_cb_->addItem(tr("converted"), DisplayConverted);
+       display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
 
        cur_idx = display_type_cb_->findData(QVariant(display_type_));
        display_type_cb_->setCurrentIndex(cur_idx);
 
-       layout->addRow(tr("Traces to show:"), display_type_cb_);
+       layout->addRow(tr("Show traces for"), display_type_cb_);
 
        connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
                this, SLOT(on_display_type_changed(int)));
@@ -817,9 +1001,31 @@ void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
        form->addRow(layout);
 }
 
-void AnalogSignal::on_samples_added()
+void AnalogSignal::hover_point_changed(const QPoint &hp)
 {
-       perform_autoranging(false, false);
+       Signal::hover_point_changed(hp);
+
+       // Note: Even though the view area begins at 0, we exclude 0 because
+       // that's also the value given when the cursor is over the header to the
+       // left of the trace paint area
+       if (hp.x() <= 0) {
+               value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
+       } else {
+               try {
+                       value_at_hover_pos_ = value_at_pixel_pos_.at(hp.x());
+               } catch (out_of_range&) {
+                       value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
+               }
+       }
+}
+
+void AnalogSignal::on_min_max_changed(float min, float max)
+{
+       (void)min;
+       (void)max;
+
+       if (autoranging_)
+               perform_autoranging(false, false);
 }
 
 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
@@ -921,11 +1127,10 @@ void AnalogSignal::on_autoranging_changed(int state)
 
 void AnalogSignal::on_conversion_changed(int index)
 {
-       data::SignalBase::ConversionType old_conv_type =
-               base_->get_conversion_type();
+       SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
 
-       data::SignalBase::ConversionType conv_type =
-               (data::SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
+       SignalBase::ConversionType conv_type =
+               (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
 
        if (conv_type != old_conv_type) {
                base_->set_conversion_type(conv_type);
@@ -938,7 +1143,7 @@ void AnalogSignal::on_conversion_changed(int index)
 
 void AnalogSignal::on_conv_threshold_changed(int index)
 {
-       data::SignalBase::ConversionType conv_type = base_->get_conversion_type();
+       SignalBase::ConversionType conv_type = base_->get_conversion_type();
 
        // Note: index is set to -1 if the text in the combo box matches none of
        // the entries in the combo box
@@ -952,7 +1157,7 @@ void AnalogSignal::on_conv_threshold_changed(int index)
 
        const bool use_custom_thr = (index == -1) || (user_data == -1);
 
-       if (conv_type == data::SignalBase::A2LConversionByTreshold && use_custom_thr) {
+       if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
                // Not one of the preset values, try to parse the combo box text
                // Note: Regex loosely based on
                // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
@@ -969,12 +1174,14 @@ void AnalogSignal::on_conv_threshold_changed(int index)
                // For now, we simply assume that the unit is volt without modifiers
                const double thr = tokens.at(1).toDouble();
 
-               // Only restart the conversion if the threshold was updated
+               // Only restart the conversion if the threshold was updated.
+               // We're starting a delayed conversion because the user may still be
+               // typing and the UI would lag if we kept on restarting it immediately
                if (base_->set_conversion_option("threshold_value", thr))
-                       delayed_conversion_starter_.start();
+                       base_->start_conversion(true);
        }
 
-       if (conv_type == data::SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
+       if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
                // Not one of the preset values, try to parse the combo box text
                // Note: Regex loosely based on
                // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
@@ -995,17 +1202,20 @@ void AnalogSignal::on_conv_threshold_changed(int index)
                const double low_thr = tokens.at(1).toDouble();
                const double high_thr = tokens.at(3).toDouble();
 
-               // Only restart the conversion if one of the options was updated
+               // Only restart the conversion if one of the options was updated.
+               // We're starting a delayed conversion because the user may still be
+               // typing and the UI would lag if we kept on restarting it immediately
                bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
                bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
                if (o1 || o2)
-                       delayed_conversion_starter_.start();
+                       base_->start_conversion(true);  // Start delayed conversion
        }
 
-       base_->set_conversion_preset(index);
+       base_->set_conversion_preset((SignalBase::ConversionPreset)index);
 
-       // Immediately start the conversion if we're not asking for a delayed reaction
-       if (!delayed_conversion_starter_.isActive())
+       // Immediately start the conversion if we're not using custom values
+       // (i.e. we're using one of the presets)
+       if (!use_custom_thr)
                base_->start_conversion();
 }
 
@@ -1022,6 +1232,14 @@ void AnalogSignal::on_display_type_changed(int index)
                owner_->row_item_appearance_changed(false, true);
 }
 
+void AnalogSignal::on_settingViewConversionThresholdDispMode_changed(const QVariant new_value)
+{
+       conversion_threshold_disp_mode_ = new_value.toInt();
+
+       if (owner_)
+               owner_->row_item_appearance_changed(false, true);
+}
+
 } // namespace trace
 } // namespace views
 } // namespace pv