Method makePath

qrenderdoc/Windows/TimelineBar.cpp:71–105

  }

  QPainterPath makePath(const int triRadius, const int triHeight, qreal y)
  {
    QPainterPath path;

    for(const QPair<qreal, qreal> &range : ranges)
    {
      if(range.first == range.second)
      {
        QPointF pos = aliasAlign(QPointF(range.first, y));

        QPainterPath triangle;
        triangle.addPolygon(
            QPolygonF({pos + QPoint(0, triHeight), pos + QPoint(triRadius * 2, triHeight),
                       pos + QPoint(triRadius, 0)}));
        triangle.closeSubpath();

        path = path.united(triangle);
      }
      else
      {
        QPointF left = aliasAlign(QPointF(range.first, y));
        QPointF right = aliasAlign(QPointF(range.second, y));

        QPainterPath trapezoid;
        trapezoid.addPolygon(
            QPolygonF({left + QPoint(0, triHeight), right + QPoint(triRadius * 2, triHeight),
                       right + QPoint(triRadius, 0), left + QPoint(triRadius, 0)}));
        trapezoid.closeSubpath();

        path = path.united(trapezoid);
      }
    }

    return path;
  }

private:
  QVector<QPair<qreal, qreal>> ranges;