JAL-2664 Initial change to drawing hidden regions in overview

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

diff --git a/src/jalview/viewmodel/OverviewDimensionsShowHidden.java b/src/jalview/viewmodel/OverviewDimensionsShowHidden.java
index c4b69a8..681d43d 100644 (file)
--- 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