adding the ability to color annotations

this is done through the `presentation` sigmf extensions simple,
annotation by annotation color setting mechanism

Signed-off-by: Jacob Gilbert <[email protected]>

Author: Jacob Gilbert

src/inputsource.cpp

@@ -38,6 +38,7 @@
 #include <QJsonObject>
 #include <QJsonArray>
 #include <QFile>
+#include <QColor>
 
 
 class ComplexF32SampleAdapter : public SampleAdapter {
@@ -339,10 +340,20 @@ void InputSource::readMetaData(const QString &filename)
                 auto frequencyRange = range_t<double>{freq_lower_edge, freq_upper_edge};
 
                 auto label = sigmf_annotation["core:label"].toString();
-
+                
                 auto comment = sigmf_annotation["core:comment"].toString();
 
-                annotationList.emplace_back(sampleRange, frequencyRange, label, comment);
+                auto sigmf_color = sigmf_annotation["presentation:color"].toString();
+                // SigMF uses the format "#RRGGBBAA" for alpha-channel colors, QT uses "#AARRGGBB"
+                if ((sigmf_color.at(0) == '#') && (sigmf_color.length()) == 9) {
+                    sigmf_color = "#" + sigmf_color.mid(7,2) + sigmf_color.mid(1,6);
+                }
+                auto boxColor = QString::fromStdString("white");
+                if (QColor::isValidColor(sigmf_color)) {
+                    boxColor = sigmf_color;
+                }
+
+                annotationList.emplace_back(sampleRange, frequencyRange, label, comment, boxColor);
             }
         }
     }

src/mainwindow.cpp

@@ -53,6 +53,7 @@ MainWindow::MainWindow()
     connect(dock->annosCheckBox, &QCheckBox::stateChanged, plots, &PlotView::enableAnnotations);
     connect(dock->annosCheckBox, &QCheckBox::stateChanged, dock, &SpectrogramControls::enableAnnotations);
     connect(dock->commentsCheckBox, &QCheckBox::stateChanged, plots, &PlotView::enableAnnotationCommentsTooltips);
+    connect(dock->annoColorCheckBox, &QCheckBox::stateChanged, plots, &PlotView::enableAnnoColors);
     connect(dock->cursorSymbolsSpinBox, static_cast<void (QSpinBox::*)(int)>(&QSpinBox::valueChanged), plots, &PlotView::setCursorSegments);
 
     // Connect dock outputs

src/plotview.cpp

@@ -53,6 +53,8 @@ PlotView::PlotView(InputSource *input) : cursors(this), viewRange({0, 0})
     enableAnnotations(true);
     enableAnnotationCommentsTooltips(true);
 
+    enableAnnoColors(true);
+
     addPlot(spectrogramPlot);
 
     mainSampleSource->subscribe(this);
@@ -654,6 +656,14 @@ void PlotView::enableAnnotationCommentsTooltips(bool enabled)
     viewport()->update();
 }
 
+void PlotView::enableAnnoColors(bool enabled)
+{
+    if (spectrogramPlot != nullptr)
+        spectrogramPlot->enableAnnoColors(enabled);
+    
+    viewport()->update();
+}
+
 int PlotView::sampleToColumn(size_t sample)
 {
     return sample / samplesPerColumn();

src/plotview.h

@@ -48,6 +48,7 @@ public slots:
     void enableScales(bool enabled);
     void enableAnnotations(bool enabled);
     void enableAnnotationCommentsTooltips(bool enabled);
+    void enableAnnoColors(bool enabled);
     void invalidateEvent() override;
     void repaint();
     void setCursorSegments(int segments);

src/samplesource.h

@@ -26,6 +26,7 @@
 #include "util.h"
 #include <QString>
 #include <QObject>
+#include <QColor>
 
 class Annotation
 {
@@ -34,11 +35,12 @@ class Annotation
     range_t<double> frequencyRange;
     QString label;
     QString comment;
+    QColor boxColor;
 
     Annotation(range_t<size_t> sampleRange, range_t<double>frequencyRange, QString label,
-               QString comment)
+               QString comment, QColor boxColor)
       : sampleRange(sampleRange), frequencyRange(frequencyRange), label(label),
-        comment(comment) {}
+        comment(comment), boxColor(boxColor) {}
 };
 
 template<typename T>

src/spectrogramcontrols.cpp

@@ -100,7 +100,9 @@ SpectrogramControls::SpectrogramControls(const QString & title, QWidget * parent
     annosCheckBox = new QCheckBox(widget);
     layout->addRow(new QLabel(tr("Display Annotations:")), annosCheckBox);
     commentsCheckBox = new QCheckBox(widget);
-    layout->addRow(new QLabel(tr("Display annotation comments tooltips:")), commentsCheckBox);
+    layout->addRow(new QLabel(tr("Annotation comments:")), commentsCheckBox);
+    annoColorCheckBox = new QCheckBox(widget);
+    layout->addRow(new QLabel(tr("Annotation Colors:")), annoColorCheckBox);
 
     widget->setLayout(layout);
     setWidget(widget);
@@ -136,7 +138,7 @@ void SpectrogramControls::setDefaults()
     cursorSymbolsSpinBox->setValue(1);
 
     annosCheckBox->setCheckState(Qt::Checked);
-    commentsCheckBox->setCheckState(Qt::Checked);
+    annoColorCheckBox->setCheckState(Qt::Checked);
 
     // Try to set the sample rate from the last-used value
     QSettings settings;

src/spectrogramcontrols.h

@@ -76,4 +76,5 @@ private slots:
     QCheckBox *scalesCheckBox;
     QCheckBox *annosCheckBox;
     QCheckBox *commentsCheckBox;
+    QCheckBox *annoColorCheckBox;
 };

src/spectrogramplot.cpp

@@ -40,6 +40,7 @@ SpectrogramPlot::SpectrogramPlot(std::shared_ptr<SampleSource<std::complex<float
     sampleRate = 0;
     frequencyScaleEnabled = false;
     sigmfAnnotationsEnabled = true;
+    sigmfAnnotationColors = true;
 
     for (int i = 0; i < 256; i++) {
         float p = (float)i / 256;
@@ -194,6 +195,10 @@ void SpectrogramPlot::paintAnnotations(QPainter &painter, QRect &rect, range_t<s
             int height = (a.frequencyRange.maximum - a.frequencyRange.minimum) / sampleRate * rect.height();
             int width = (a.sampleRange.maximum - a.sampleRange.minimum) / getStride();
 
+            if (sigmfAnnotationColors) {
+                painter.setPen(a.boxColor);
+            }
+
             // Draw the label 2 pixels above the box
             painter.drawText(x, y - 2, a.label);
             painter.drawRect(x, y, width, height);
@@ -417,6 +422,11 @@ bool SpectrogramPlot::isAnnotationsEnabled(void)
     return sigmfAnnotationsEnabled;
 }
 
+void SpectrogramPlot::enableAnnoColors(bool enabled)
+{
+    sigmfAnnotationColors = enabled;
+}
+
 bool SpectrogramPlot::tunerEnabled()
 {
     return (tunerTransform->subscriberCount() > 0);

src/spectrogramplot.h

@@ -53,6 +53,7 @@ class SpectrogramPlot : public Plot
     void enableScales(bool enabled);
     void enableAnnotations(bool enabled);
     bool isAnnotationsEnabled();
+    void enableAnnoColors(bool enabled);
     QString *mouseAnnotationComment(const QMouseEvent *event);
 
 public slots:
@@ -81,6 +82,7 @@ public slots:
     double sampleRate;
     bool frequencyScaleEnabled;
     bool sigmfAnnotationsEnabled;
+    bool sigmfAnnotationColors;
 
     Tuner tuner;
     std::shared_ptr<TunerTransform> tunerTransform;