+
+ /**
+ * Follow a scrolling change in the (cDNA/Protein) complementary alignment.
+ * The aim is to keep the two alignments 'lined up' on their centre columns.
+ *
+ * @param sr
+ * holds mapped region(s) of this alignment that we are scrolling
+ * 'to'; may be modified for sequence offset by this method
+ * @param seqOffset
+ * the number of visible sequences to show above the mapped region
+ */
+ protected void scrollToCentre(SearchResultsI sr, int seqOffset)
+ {
+ /*
+ * To avoid jumpy vertical scrolling (if some sequences are gapped or not
+ * mapped), we can make the scroll-to location a sequence above the one
+ * actually mapped.
+ */
+ SequenceI mappedTo = sr.getResults().get(0).getSequence();
+ List<SequenceI> seqs = av.getAlignment().getSequences();
+
+ /*
+ * This is like AlignmentI.findIndex(seq) but here we are matching the
+ * dataset sequence not the aligned sequence
+ */
+ int sequenceIndex = 0;
+ boolean matched = false;
+ for (SequenceI seq : seqs)
+ {
+ if (mappedTo == seq.getDatasetSequence())
+ {
+ matched = true;
+ break;
+ }
+ sequenceIndex++;
+ }
+ if (!matched)
+ {
+ return; // failsafe, shouldn't happen
+ }
+
+ /*
+ * Scroll to position but centring the target residue. Also set a state flag
+ * to prevent adjustmentValueChanged performing this recursively.
+ */
+ setFollowingComplementScroll(true);
+ // this should be scrollToPosition(sr,verticalOffset,
+ scrollToPosition(sr, seqOffset, true, true);
+ }
+