JAL-244 Avoid working on the Ids Graphics object when we don't mean to

diff --git a/src/jalview/gui/AnnotationLabels.java b/src/jalview/gui/AnnotationLabels.java
index 255e1ff..56efe53 100755 (executable)
--- a/src/jalview/gui/AnnotationLabels.java
+++ b/src/jalview/gui/AnnotationLabels.java
@@ -1244,10 +1244,7 @@ public class AnnotationLabels extends JPanel
     }
     else
     {
-      Graphics2D g2d = (Graphics2D) g;
-      Graphics dummy = g2d.create();
-      int newAnnotationIdWidth = drawLabels(dummy, clip, width, false,
-              null);
+      int newAnnotationIdWidth = drawLabels(g, clip, width, false, null);
       width = Math.max(newAnnotationIdWidth, givenWidth);
     }
     drawLabels(g, clip, width, true, null);
@@ -1271,7 +1268,7 @@ public class AnnotationLabels extends JPanel
    * @param fmetrics
    *          FontMetrics if Graphics object g is null
    */
-  public int drawLabels(Graphics g, boolean clip, int width,
+  public int drawLabels(Graphics g0, boolean clip, int width,
           boolean actuallyDraw, FontMetrics fmetrics)
   {
     if (clip)
@@ -1279,6 +1276,20 @@ public class AnnotationLabels extends JPanel
       clip = Cache.getDefault("MOVE_SEQUENCE_ID_WITH_VISIBLE_ANNOTATIONS",
               true);
     }
+    Graphics g = null;
+    // create a dummy Graphics object if not drawing and one is supplied
+    if (g0 != null)
+    {
+      if (!actuallyDraw)
+      {
+        Graphics2D g2d = (Graphics2D) g0;
+        g = g2d.create();
+      }
+      else
+      {
+        g = g0;
+      }
+    }
     int actualWidth = 0;
     if (g != null)
     {