+ /** @brief Adjusts the margins of the header area.
+ *
+ * Avoid a shift between header area and trackview if
+ * the horizontal scrollbar is visible and the position
+ * of the vertical scrollbar is maximal */
+ void slotUpdateVerticalScroll(int min, int max);
+ void slotShowTrackEffects(int);
+ /** @brief Update the track label showing applied effects.*/
+ void slotUpdateTrackEffectState(int);
+