1 files changed, 45 insertions, 0 deletions
diff --git a/client/src/main/java/com/vaadin/client/VSchedulerImpl.java b/client/src/main/java/com/vaadin/client/VSchedulerImpl.java
new file mode 100644
index 0000000000..2c0657eb59
--- /dev/null
+++ b/client/src/main/java/com/vaadin/client/VSchedulerImpl.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2000-2014 Vaadin Ltd.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.vaadin.client;
+
+import com.google.gwt.core.client.impl.SchedulerImpl;
+
+public class VSchedulerImpl extends SchedulerImpl {
+
+    /**
+     * Keeps track of if there are deferred commands that are being executed. 0
+     * == no deferred commands currently in progress, > 0 otherwise.
+     */
+    private int deferredCommandTrackers = 0;
+
+    @Override
+    public void scheduleDeferred(ScheduledCommand cmd) {
+        deferredCommandTrackers++;
+        super.scheduleDeferred(cmd);
+        super.scheduleDeferred(new ScheduledCommand() {
+
+            @Override
+            public void execute() {
+                deferredCommandTrackers--;
+            }
+        });
+    }
+
+    public boolean hasWorkQueued() {
+        boolean hasWorkQueued = (deferredCommandTrackers != 0);
+        return hasWorkQueued;
+    }
+}