Prevents DotColumns from triggering VerticalAlignment

[lilypond.git] / lily / dot-column.cc

diff --git a/lily/dot-column.cc b/lily/dot-column.cc
index 2292d2fe0999b295623f8f9a064d7b96d90f1560..03f368d76b50703cd49055d54820417ec3248f63 100644 (file)
--- a/lily/dot-column.cc
+++ b/lily/dot-column.cc
@@ -143,7 +143,14 @@ Dot_column::calc_positioning_done (SCM smob)
         }
     }
 
-  vector_sort (dots, position_less);
+  /*
+    The use of pure_position_less and pure_get_rounded_position below
+    are due to the fact that this callback is called before line breaking
+    occurs.  Because dots' actual Y posiitons may be linked to that of
+    beams (dots are attached to rests, which are shifted to avoid beams),
+    we instead must use their pure Y positions.
+  */
+  vector_sort (dots, pure_position_less);
   for (vsize i = dots.size (); i--;)
     {
       if (!dots[i]->is_live ())
@@ -170,7 +177,7 @@ Dot_column::calc_positioning_done (SCM smob)
           dp.x_extent_ = note->extent (commonx, X_AXIS);
         }
 
-      int p = Staff_symbol_referencer::get_rounded_position (dp.dot_);
+      int p = Staff_symbol_referencer::pure_get_rounded_position (dp.dot_);
 
       /* icky, since this should go via a Staff_symbol_referencer
          offset callback but adding a dot overwrites Y-offset. */
@@ -191,7 +198,7 @@ Dot_column::calc_positioning_done (SCM smob)
       /*
         Junkme?
        */
-      Staff_symbol_referencer::set_position (i->second.dot_, i->first);
+      Staff_symbol_referencer::pure_set_position (i->second.dot_, i->first);
     }
 
   me->translate_axis (cfg.x_offset () - me->relative_coordinate (commonx, X_AXIS),