+ /**
+ * Returns the offset to show the drag handle.
+ */
+ int scale_handle_offset() const;
+
+ /**
+ * Handles the scale handle being dragged to an offset.
+ * @param offset the offset the scale handle was dragged to.
+ */
+ void scale_handle_dragged(int offset);
+
+ /**
+ * @copydoc pv::view::Signal::signal_scale_handle_drag_release()
+ */
+ void scale_handle_drag_release();
+