+ const QColor fill = Colours[(_format * (countof(Colours) / 2 + 1)) %
+ countof(Colours)];
+ const QColor outline(fill.darker());
+
+ if (start > right + DrawPadding || end < left - DrawPadding)
+ return;
+
+ if (_start_sample == _end_sample)
+ draw_instant(p, fill, outline, text_color, h,
+ start, y);
+ else
+ draw_range(p, fill, outline, text_color, h,
+ start, end, y);
+}
+
+void Annotation::draw_instant(QPainter &p, QColor fill, QColor outline,
+ QColor text_color, int h, double x, int y)
+{
+ const QString text = _annotations.empty() ?
+ QString() : _annotations.back();
+ const double w = min(p.boundingRect(QRectF(), 0, text).width(),
+ 0.0) + h;
+ const QRectF rect(x - w / 2, y - h / 2, w, h);
+
+ p.setPen(outline);
+ p.setBrush(fill);
+ p.drawRoundedRect(rect, h / 2, h / 2);
+
+ p.setPen(text_color);
+ p.drawText(rect, Qt::AlignCenter | Qt::AlignVCenter, text);
+}
+
+void Annotation::draw_range(QPainter &p, QColor fill, QColor outline,
+ QColor text_color, int h, double start, double end, int y)
+{
+ const double top = y + .5 - h / 2;
+ const double bottom = y + .5 + h / 2;
+
+ p.setPen(outline);
+ p.setBrush(fill);