From: Jim Procter <jprocter@dundee.ac.uk>
Date: Tue, 21 May 2024 17:15:11 +0000 (+0100)
Subject: JAL-4159 sometimes the progress bar may not be available - null check
X-Git-Tag: Release_2_11_4_0~31^2~17
X-Git-Url: http://source.jalview.org/gitweb/?a=commitdiff_plain;h=8c6b6a42a800bd82ebb40ebc58d3c463d2e97a9c;p=jalview.git

JAL-4159 sometimes the progress bar may not be available - null check
---

diff --git a/src/jalview/gui/ProgressBar.java b/src/jalview/gui/ProgressBar.java
index 8189313..73cd496 100644
--- a/src/jalview/gui/ProgressBar.java
+++ b/src/jalview/gui/ProgressBar.java
@@ -24,6 +24,7 @@ import jalview.util.MessageManager;
 
 import java.awt.BorderLayout;
 import java.awt.Component;
+import java.awt.Container;
 import java.awt.GridLayout;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
@@ -272,10 +273,17 @@ public class ProgressBar implements IProgressIndicator
    */
   public JProgressBar getProgressBar(long id)
   {
-    for (Component component : progressBars.get(id).getComponents())
-    { 
+    Container progBar = progressBars.get(id);
+    if (progBar==null || progBar.getComponentCount()==0)
+    {
+      return null;
+    }
+    for (Component component : progBar.getComponents())
+    {
       if (component.getClass().equals(JProgressBar.class))
-	return (JProgressBar) component;
+      {
+        return (JProgressBar) component;
+      }
     }
     return null;
   }