Implement graphical display of A2L thresholds

[pulseview.git] / pv / views / trace / analogsignal.cpp

diff --git a/pv/views/trace/analogsignal.cpp b/pv/views/trace/analogsignal.cpp
index 930780731e1a550acf23c25602e11d59c334dc72..c40c93b028a341d2e8c2329313d16acde193c925 100644 (file)
--- a/pv/views/trace/analogsignal.cpp
+++ b/pv/views/trace/analogsignal.cpp
@@ -75,6 +75,8 @@ const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
 
 const QColor AnalogSignal::SamplingPointColour(0x77, 0x77, 0x77);
 
+const QColor AnalogSignal::ThresholdColor = QColor(0, 0, 0, 30 * 256 / 100);
+
 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
 const float AnalogSignal::EnvelopeThreshold = 64.0f;
 
@@ -242,11 +244,15 @@ void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
                                pixels_offset, samples_per_pixel);
        }
 
-       if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth)) {
-               const SignalBase::ConversionType conv_type = base_->get_conversion_type();
+       const SignalBase::ConversionType conv_type = base_->get_conversion_type();
+
+       if (((conv_type == SignalBase::A2LConversionByThreshold) ||
+               (conv_type == SignalBase::A2LConversionBySchmittTrigger))) {
+
+               if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))
+                       paint_conversion_thresholds(p, pp);
 
-               if (((conv_type == SignalBase::A2LConversionByThreshold) ||
-                       (conv_type == SignalBase::A2LConversionBySchmittTrigger)))
+               if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
                        paint_logic_mid(p, pp);
        }
 }
@@ -434,6 +440,44 @@ void AnalogSignal::paint_envelope(QPainter &p,
        delete[] e.samples;
 }
 
+void AnalogSignal::paint_conversion_thresholds(QPainter &p,
+       ViewItemPaintParams &pp)
+{
+       if (!base_->enabled() || !base_->logic_data())
+               return;
+
+       // TODO Register a change handler instead of querying this with every repaint
+       GlobalSettings settings;
+       const bool show_conversion_thresholds =
+               settings.value(GlobalSettings::Key_View_ShowConversionThresholds).toBool();
+
+       if (!show_conversion_thresholds)
+               return;
+
+       const vector<double> thresholds = base_->get_conversion_thresholds();
+       const int y = get_visual_y();
+
+       p.setRenderHint(QPainter::Antialiasing, false);
+
+       p.setPen(ThresholdColor);
+
+       if (thresholds.size() == 2) {
+               // Draw as hatched block because two thresholds denote lower/upper level
+               const double thr_y0 = y - thresholds[0] * scale_;
+               const double thr_y1 = y - thresholds[1] * scale_;
+               p.fillRect(QRect(pp.left(), thr_y0, pp.right(), thr_y1 - thr_y0),
+                       QBrush(ThresholdColor, Qt::BDiagPattern));
+       } else {
+               // Draw as individual lines
+               for (const double thr : thresholds) {
+                       const double thr_y = y - thr * scale_;
+                       p.drawLine(QPointF(pp.left(), thr_y), QPointF(pp.right(), thr_y));
+               }
+       }
+
+       p.setRenderHint(QPainter::Antialiasing, true);
+}
+
 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 {
        QLineF *line;