working on async method for rebuilding sketch menu

app/Editor.java

@@ -1563,7 +1563,8 @@ public class Editor extends JFrame
         if (!oldPath.equals(newPath)) {
           if (Base.calcFolderSize(sketch.folder) == 0) {
             Base.removeDir(sketch.folder);
-            sketchbook.rebuildMenus();
+            //sketchbook.rebuildMenus();
+            sketchbook.rebuildMenusAsync();
           }
         }
       } catch (Exception e) { }   // oh well
@@ -1695,7 +1696,8 @@ public class Editor extends JFrame
         message(EMPTY);
       }
       // rebuild sketch menu in case a save-as was forced
-      sketchbook.rebuildMenus();
+      //sketchbook.rebuildMenus();
+      sketchbook.rebuildMenusAsync();
 
     } catch (Exception e) {
       // show the error as a message in the window
@@ -1720,7 +1722,7 @@ public class Editor extends JFrame
           try {
             if (sketch.saveAs()) {
               message("Done Saving.");
-              sketchbook.rebuildMenus();
+              sketchbook.rebuildMenusAsync();
             } else {
               message("Save Cancelled.");
             }

app/Sketchbook.java

@@ -224,7 +224,7 @@ public class Sketchbook {
     }
 
     // make a note of a newly added sketch in the sketchbook menu
-    rebuildMenus();
+    rebuildMenusAsync();
 
     // now open it up
     //handleOpen(newbieName, newbieFile, newbieDir);
@@ -340,6 +340,19 @@ public class Sketchbook {
   }
 
 
+  /**
+   * Asynchronous version of menu rebuild to be used on 'new' and 'save',
+   * to prevent the interface from locking up until the menus are done.
+   */
+  public void rebuildMenusAsync() {
+    SwingUtilities.invokeLater(new Runnable() {
+        public void run() {
+          rebuildMenus();
+        }
+      });
+  }
+
+
   /**
    * Rebuild the menu full of sketches based on the
    * contents of the sketchbook.
@@ -349,6 +362,7 @@ public class Sketchbook {
    * the menu will disappear from its original location.
    */
   public void rebuildMenus() {
+    //EditorConsole.systemOut.println("rebuilding menus");
     try {
       // rebuild file/open and the toolbar popup menus
       buildMenu(openMenu);
@@ -373,6 +387,7 @@ public class Sketchbook {
                           "sketchbook menu. Things might get a little\n" +
                           "kooky around here.", e);
     }
+    //EditorConsole.systemOut.println("done rebuilding menus");
   }