Make the toolbar be singleton and initialized once.

Solves TSK-564 	Toolbar widgets sometimes disabled

Ingest/src/org/sleuthkit/autopsy/ingest/IngestMessagesAction.java

@@ -16,17 +16,12 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
-
 package org.sleuthkit.autopsy.ingest;
 
 import java.awt.Component;
 import java.awt.event.ActionEvent;
 import javax.swing.AbstractAction;
 import org.openide.util.actions.Presenter;
-import org.openide.windows.Mode;
-import org.openide.windows.WindowManager;
-
 
 //@ActionID(category = "File",
 //id = "org.sleuthkit.autopsy.ingest.IngestMessagesAction")
@@ -36,15 +31,14 @@ import org.openide.windows.WindowManager;
 //    @ActionReference(path = "Toolbars/File", position = 575)
 //})
 //@Messages("CTL_IngestMessagesAction=Messages")
-public final class IngestMessagesAction  extends AbstractAction implements Presenter.Toolbar {
+public final class IngestMessagesAction extends AbstractAction implements Presenter.Toolbar {
-    
+
     @Override
     public void actionPerformed(ActionEvent e) {
-        
     }
-    
+
     @Override
     public Component getToolbarPresenter() {
-        return new IngestMessagesToolbar();
+        return IngestMessagesToolbar.getDefault();
     }
 }

Ingest/src/org/sleuthkit/autopsy/ingest/IngestMessagesToolbar.form

@@ -1,4 +1,4 @@
-<?xml version="1.1" encoding="UTF-8" ?>
+<?xml version="1.0" encoding="UTF-8" ?>
 
 <Form version="1.5" maxVersion="1.7" type="org.netbeans.modules.form.forminfo.JPanelFormInfo">
   <Properties>

Ingest/src/org/sleuthkit/autopsy/ingest/IngestMessagesToolbar.java

@@ -32,22 +32,35 @@ import org.sleuthkit.autopsy.casemodule.Case;
 
 /**
  * Toolbar for Ingest
- * 
+ *
  */
 public class IngestMessagesToolbar extends javax.swing.JPanel {
 
     private IngestMessagesButton ingestMessagesButton = new IngestMessagesButton();
+    private static IngestMessagesToolbar instance;
 
-    /** Creates new form IngestMessagesToolbar */
+    /**
-    public IngestMessagesToolbar() {
+     * Creates new form IngestMessagesToolbar
+     */
+    private IngestMessagesToolbar() {
         initComponents();
         customizeComponents();
     }
 
-    /** This method is called from within the constructor to
+    /**
-     * initialize the form.
+     * @return the default instance IngestMessagesToolbar
-     * WARNING: Do NOT modify this code. The content of this method is
+     */
-     * always regenerated by the Form Editor.
+    public static IngestMessagesToolbar getDefault() {
+        if (instance == null) {
+            instance = new IngestMessagesToolbar();
+        }
+        return instance;
+    }
+
+    /**
+     * This method is called from within the constructor to initialize the form.
+     * WARNING: Do NOT modify this code. The content of this method is always
+     * regenerated by the Form Editor.
      */
     @SuppressWarnings("unchecked")
     // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
@@ -82,7 +95,6 @@ public class IngestMessagesToolbar extends javax.swing.JPanel {
         ingestMessagesButton.setMinimumSize(new java.awt.Dimension(38, 24));
         ingestMessagesButton.setPreferredSize(new java.awt.Dimension(38, 24));
         ingestMessagesButton.addActionListener(new java.awt.event.ActionListener() {
-
             @Override
             public void actionPerformed(java.awt.event.ActionEvent evt) {
                 showIngestMessages();
@@ -94,11 +106,10 @@ public class IngestMessagesToolbar extends javax.swing.JPanel {
     private void customizeComponents() {
 
         customizeButton();
-        
+
         this.setBorder(null);
 
         IngestMessagePanel.addPropertyChangeSupportListener(new PropertyChangeListener() {
-
             @Override
             public void propertyChange(PropertyChangeEvent evt) {
                 final int numberMessages = (Integer) evt.getNewValue();
@@ -110,7 +121,6 @@ public class IngestMessagesToolbar extends javax.swing.JPanel {
         });
 
         Case.addPropertyChangeListener(new PropertyChangeListener() {
-
             @Override
             public void propertyChange(PropertyChangeEvent evt) {
                 if (evt.getPropertyName().equals(Case.CASE_CURRENT_CASE)) {
@@ -140,31 +150,32 @@ public class IngestMessagesToolbar extends javax.swing.JPanel {
 
     private static class IngestMessagesButton extends JButton {
 
-
         private static final int fontSize = 9;
         private static final Font messagesFont = new java.awt.Font("Tahoma", Font.PLAIN, fontSize);
         private int messages = 0;
 
         @Override
-        public void paint(Graphics g) {           
+        public void paint(Graphics g) {
             super.paint(g);
-            
+
-            if (messages == 0)
+            if (messages == 0) {
                 return;
+            }
             //paint text
             String messageStr = Integer.toString(messages);
             final int len = messageStr.length();
             g.setFont(messagesFont);
-            
+
             int dx = len * 5 + 5;
             int x = getSize().width - dx;
-            if (x<0)
+            if (x < 0) {
                 x = 0;
+            }
             g.setColor(Color.GRAY);
             //g.fillRect(x, 1, dx, fontSize);
             g.fillRoundRect(x, 1, dx, fontSize, 2, 2);
             g.setColor(Color.WHITE);
-            g.drawString(messageStr, x+2, fontSize);      
+            g.drawString(messageStr, x + 2, fontSize);
         }
 
         void setMessages(int messages) {