+
+ /**
+ * Paints the signal label into a QGLWidget.
+ * @param p the QPainter to paint into.
+ * @param rect the rectangular area to draw the label into.
+ * @param hover true if the label is being hovered over by the mouse.
+ */
+ virtual void paint_label(QPainter &p, const QRect &rect,
+ bool hover);
+
+ /**
+ * Determines if a point is in the header label rect.
+ * @param rect the rectangular area to draw the label into.
+ * @param point the point to test.
+ */
+ bool pt_in_label_rect(const QRect &rect, const QPoint &point);
+
+private:
+
+ /**
+ * Computes an caches the size of the label text.
+ */
+ void compute_text_size(QPainter &p);
+