X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fviewmodel%2FViewportRanges.java;h=b6bfcd6658c1cf6859d76af6d5d5ee7d86befb84;hb=801c367379086cc38bf4d3059a8e30ca9f4e78c0;hp=f8decf6b9710efc1f5dca8b01721a05dc444dc76;hpb=74d5ca6390288f6cd6cb445cccc728802806a29a;p=jalview.git

diff --git a/src/jalview/viewmodel/ViewportRanges.java b/src/jalview/viewmodel/ViewportRanges.java
index f8decf6..b6bfcd6 100644
--- a/src/jalview/viewmodel/ViewportRanges.java
+++ b/src/jalview/viewmodel/ViewportRanges.java
@@ -23,6 +23,8 @@ package jalview.viewmodel;
 import jalview.datamodel.AlignmentI;
 import jalview.datamodel.HiddenColumns;
 
+import java.util.Arrays;
+
 /**
  * Supplies and updates viewport properties relating to position such as: start
  * and end residues and sequences; ideally will serve hidden columns/rows too.
@@ -72,10 +74,25 @@ public class ViewportRanges extends ViewportProperties
     this.startRes = 0;
     this.endRes = alignment.getWidth() - 1;
     this.startSeq = 0;
-    this.endSeq = alignment.getHeight() - 1;
+    this.setEndSeqTest(alignment.getHeight() - 1);
     this.al = alignment;
   }
 
+  public static String sTest = "";
+
+  private void setEndSeqTest(int val)
+  {
+    String st = Thread.currentThread().toString();
+    sTest += "ViewPortRanges.setEndseqTest " + val + " "
+            + st + "\n";
+    if (val == 13)
+    {
+      sTest += Arrays.toString(new NullPointerException().getStackTrace())
+              .replace(',', '\n')
+              + "\n";
+    }
+    endSeq = val;
+  }
   /**
    * Get alignment width in cols, including hidden cols
    */
@@ -286,15 +303,15 @@ public class ViewportRanges extends ViewportProperties
     int oldendseq = this.endSeq;
     if (end >= visibleHeight)
     {
-      endSeq = Math.max(visibleHeight - 1, 0);
+      setEndSeqTest(Math.max(visibleHeight - 1, 0));
     }
     else if (end < 0)
     {
-      endSeq = 0;
+      setEndSeqTest(0);
     }
     else
     {
-      endSeq = end;
+      setEndSeqTest(end);
     }
     return new int[] { oldstartseq, oldendseq };
   }
@@ -813,4 +830,11 @@ public class ViewportRanges extends ViewportProperties
 
     return maxScroll;
   }
+
+  @Override
+  public String toString()
+  {
+    return "[ViewportRange startRes=" + startRes + " endRes=" + endRes
+            + " startSeq=" + startSeq + " endSeq=" + endSeq + "]";
+  }
 }