QSize sizeHint() const;
+ /**
+ * The extended area that the header widget would like to be sized to.
+ * @remarks This area is the area specified by sizeHint, extended by
+ * the area to overlap the viewport.
+ */
+ QSize extended_size_hint() const;
+
/**
* The horizontal offset, relative to the left edge of the widget,
* where the arrows of the trace labels end.