JAL-1161 conditional parameters for controlling clipping

[jalview.git] / src / jalview / appletgui / AnnotationPanel.java

diff --git a/src/jalview/appletgui/AnnotationPanel.java b/src/jalview/appletgui/AnnotationPanel.java
index f4b2212..f63cb76 100755 (executable)
--- a/src/jalview/appletgui/AnnotationPanel.java
+++ b/src/jalview/appletgui/AnnotationPanel.java
@@ -657,10 +657,12 @@ public class AnnotationPanel extends Panel implements AwtRenderPanelI,
   @Override
   public int[] getVisibleVRange()
   {
+    if (ap!=null && ap.alabels!=null)
+    {
     int sOffset=-ap.alabels.scrollOffset;
     int visHeight = sOffset+ap.annotationPanelHolder.getHeight();
     bounds[0] = sOffset; bounds[1]=visHeight;
     return bounds;
+    } else return null;
   }
-
 }