JAL-1691 more stable linked scrolling across split frame (+javadoc)

[jalview.git] / src / jalview / viewmodel / AlignmentViewport.java

diff --git a/src/jalview/viewmodel/AlignmentViewport.java b/src/jalview/viewmodel/AlignmentViewport.java
index d6aa400..d8ade26 100644 (file)
--- a/src/jalview/viewmodel/AlignmentViewport.java
+++ b/src/jalview/viewmodel/AlignmentViewport.java
@@ -2549,6 +2549,11 @@ public abstract class AlignmentViewport implements AlignViewportI,
      */
     int seqOffset = 0;
     SequenceI sequence = null;
+
+    /*
+     * locate 'middle' column (true middle if an odd number visible, left of
+     * middle if an even number visible)
+     */
     int middleColumn = getStartRes() + (getEndRes() - getStartRes()) / 2;
     final HiddenSequences hiddenSequences = getAlignment()
             .getHiddenSequences();