diff --git a/libs/widgets/tabbable.cc b/libs/widgets/tabbable.cc
index 05e66ccd8f..c9b6660f45 100644
--- a/libs/widgets/tabbable.cc
+++ b/libs/widgets/tabbable.cc
@@ -539,6 +539,8 @@ Tabbable::showhide_att_right (bool yn)
 	} else {
 		content_right_vbox.hide ();
 	}
+
+	StateChange (*this);
 }
 
 void
@@ -563,6 +565,8 @@ Tabbable::showhide_att_left (bool yn)
 	} else {
 		content_att_left.hide ();
 	}
+
+	StateChange (*this);
 }
 
 void
@@ -587,6 +591,8 @@ Tabbable::showhide_att_bottom (bool yn)
 	} else {
 		content_att_bottom.hide ();
 	}
+
+	StateChange (*this);
 }
 
 void
diff --git a/libs/widgets/widgets/tabbable.h b/libs/widgets/widgets/tabbable.h
index 755e3e1454..027c966a86 100644
--- a/libs/widgets/widgets/tabbable.h
+++ b/libs/widgets/widgets/tabbable.h
@@ -102,6 +102,10 @@ public:
 	void att_right_button_toggled();
 	void att_bottom_button_toggled();
 
+	bool att_left_visible () const { return content_att_left.get_visible (); }
+	bool att_right_visible () const { return content_att_right.get_visible (); }
+	bool att_bottom_visible () const { return content_att_bottom.get_visible (); }
+
 protected:
 	virtual void showhide_att_left (bool yn);
 	virtual void showhide_att_right (bool yn);