+void Annotation::paint(QPainter &p, QColor fill, QColor outline,
+ QColor text_color, int text_height, int left, int right,
+ double samples_per_pixel, double pixels_offset, int y)
+{
+ const int h = (text_height * 3) / 2;
+
+ const double start = _start_sample / samples_per_pixel -
+ pixels_offset;
+ const double end = _end_sample / samples_per_pixel -
+ pixels_offset;
+
+ if (start > right || end < left)
+ return;
+
+ const double cap_width = min((end - start) / 2, EndCapWidth);
+
+ QPointF pts[] = {
+ QPointF(start, y + .5f),
+ QPointF(start + cap_width, y + .5f - h / 2),
+ QPointF(end - cap_width, y + .5f - h / 2),
+ QPointF(end, y + .5f),
+ QPointF(end - cap_width, y + .5f + h / 2),
+ QPointF(start + cap_width, y + .5f + h / 2)
+ };
+
+ p.setPen(outline);
+ p.setBrush(fill);
+ p.drawConvexPolygon(pts, countof(pts));
+
+ if (!_annotations.empty())
+ {
+ QRectF rect(start + cap_width, y - h / 2,
+ end - start - cap_width * 2, h);
+ p.setPen(text_color);
+ p.drawText(rect, Qt::AlignCenter,
+ p.fontMetrics().elidedText(
+ _annotations.front(), Qt::ElideRight,
+ rect.width()));
+ }
+}
+