+const QColor Trace::BrightGrayBGColour = QColor(0, 0, 0, 10*255/100);
+const QColor Trace::DarkGrayBGColour = QColor(0, 0, 0, 15*255/100);
+
+Trace::Trace(std::shared_ptr<data::SignalBase> channel) :
+ base_(channel),
+ coloured_bg_(true), // Default setting is set in MainWindow::setup_ui()