- * Gets the marker label rectangle.
- * @param rect The rectangle of the ruler client area.
- * @return Returns the label rectangle.
+ * Computes the outline rectangle of a label.
+ * @param rect the rectangle of the header area.
+ * @return Returns the rectangle of the signal label.
+ */
+ QRectF label_rect(const QRectF &rect) const;
+
+ /**
+ * Gets the text to show in the marker.