X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fviewmodel%2FOverviewDimensionsShowHidden.java;h=681d43dc15f4f3aacf16b61a187df6e4ae8a3f53;hb=25cef69f3cda02693838bd0225c91d639ed50fc5;hp=c4b69a86e37d1fc124b7fcc79163e59eea2cafa6;hpb=58fb14c48ecb086be7422f92addf14f930656523;p=jalview.git

diff --git a/src/jalview/viewmodel/OverviewDimensionsShowHidden.java b/src/jalview/viewmodel/OverviewDimensionsShowHidden.java
index c4b69a8..681d43d 100644
--- a/src/jalview/viewmodel/OverviewDimensionsShowHidden.java
+++ b/src/jalview/viewmodel/OverviewDimensionsShowHidden.java
@@ -81,7 +81,9 @@ public class OverviewDimensionsShowHidden extends OverviewDimensions
     int visXAsRes = hiddenCols.findColumnPosition(xAsRes);
     yAsSeq = hiddenSeqs.adjustForHiddenSeqs(
             hiddenSeqs.findIndexWithoutHiddenSeqs(yAsSeq));
+    yAsSeq = Math.max(yAsSeq, 0); // -1 if before first visible sequence
     int visYAsSeq = hiddenSeqs.findIndexWithoutHiddenSeqs(yAsSeq);
+    visYAsSeq = Math.max(visYAsSeq, 0); // -1 if before first visible sequence
 
     // update viewport accordingly
     updateViewportFromTopLeft(visXAsRes, visYAsSeq, hiddenSeqs, hiddenCols);
@@ -125,6 +127,11 @@ public class OverviewDimensionsShowHidden extends OverviewDimensions
       visYAsSeq = 0;
     }
 
+    if (ranges.isWrappedMode())
+    {
+      visYAsSeq = 0; // sorry, no vertical scroll when wrapped
+    }
+
     // Determine where scrollCol should be, given visXAsRes
 
     // get viewport width in residues