X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fgui%2FSliderPanel.java;h=83193dc0eb77716d5812a23acb1c77d582ebe9fa;hb=06ce849ffedc7ab10a3c54cda96b9a7dec58c136;hp=af77c48cacdf0077a610c291956273b58680b394;hpb=7dc7fb2a35c435d825bc91c5ae60ec6073419a69;p=jalview.git

diff --git a/src/jalview/gui/SliderPanel.java b/src/jalview/gui/SliderPanel.java
index af77c48..83193dc 100755
--- a/src/jalview/gui/SliderPanel.java
+++ b/src/jalview/gui/SliderPanel.java
@@ -159,25 +159,37 @@ public class SliderPanel extends GSliderPanel
     return sp.getValue();
   }
 
+  /**
+   * Hides the PID slider panel if it is shown
+   */
   public static void hidePIDSlider()
   {
-    try
-    {
-      PIDSlider.setClosed(true);
-      PIDSlider = null;
-    } catch (PropertyVetoException ex)
+    if (PIDSlider != null)
     {
+      try
+      {
+        PIDSlider.setClosed(true);
+        PIDSlider = null;
+      } catch (PropertyVetoException ex)
+      {
+      }
     }
   }
 
+  /**
+   * Hides the conservation slider panel if it is shown
+   */
   public static void hideConservationSlider()
   {
-    try
-    {
-      conservationSlider.setClosed(true);
-      conservationSlider = null;
-    } catch (PropertyVetoException ex)
+    if (conservationSlider != null)
     {
+      try
+      {
+        conservationSlider.setClosed(true);
+        conservationSlider = null;
+      } catch (PropertyVetoException ex)
+      {
+      }
     }
   }