diff -r ed1c9f64298a -r 5b9d4d8641ce trace/traceviewer/com.nokia.traceviewer/src/com/nokia/traceviewer/action/OpenVariableTracingHistoryAction.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/trace/traceviewer/com.nokia.traceviewer/src/com/nokia/traceviewer/action/OpenVariableTracingHistoryAction.java	Wed Jun 23 14:49:59 2010 +0300
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies). 
+ * All rights reserved.
+ * This component and the accompanying materials are made available
+ * under the terms of "Eclipse Public License v1.0"
+ * which accompanies this distribution, and is available
+ * at the URL "http://www.eclipse.org/legal/epl-v10.html".
+ *
+ * Initial Contributors:
+ * Nokia Corporation - initial contribution.
+ *
+ * Contributors:
+ *
+ * Description:
+ *
+ * Handler for open variable tracing history command
+ *
+ */
+package com.nokia.traceviewer.action;
+
+import org.eclipse.jface.resource.ImageDescriptor;
+import org.eclipse.ui.ISharedImages;
+import org.eclipse.ui.PlatformUI;
+
+import com.nokia.traceviewer.TraceViewerHelpContextIDs;
+import com.nokia.traceviewer.dialog.VariableTracingHistoryDialog;
+import com.nokia.traceviewer.engine.TraceViewerGlobals;
+import com.nokia.traceviewer.engine.TraceViewerDialogInterface.Dialog;
+
+/**
+ * Handler for open variable tracing history command
+ * 
+ */
+final class OpenVariableTracingHistoryAction extends TraceViewerAction {
+
+	/**
+	 * Image for this Action
+	 */
+	private static ImageDescriptor image;
+
+	/**
+	 * Variable Tracing History dialog
+	 */
+	private VariableTracingHistoryDialog dialog;
+
+	static {
+		image = PlatformUI.getWorkbench().getSharedImages().getImageDescriptor(
+				ISharedImages.IMG_OBJS_INFO_TSK);
+	}
+
+	/**
+	 * Constructor
+	 */
+	OpenVariableTracingHistoryAction() {
+		setText(Messages.getString("OpenVariableTracingHistoryAction.Title")); //$NON-NLS-1$
+		setToolTipText(Messages
+				.getString("OpenVariableTracingHistoryAction.Tooltip")); //$NON-NLS-1$
+		setImageDescriptor(image);
+
+		// Set help
+		PlatformUI.getWorkbench().getHelpSystem().setHelp(this,
+				TraceViewerHelpContextIDs.VARIABLE_TRACING_HISTORY);
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see com.nokia.traceviewer.action.TraceViewerAction#doRun()
+	 */
+	@Override
+	protected void doRun() {
+		// Create the dialog
+		if (dialog == null) {
+			dialog = (VariableTracingHistoryDialog) TraceViewerGlobals
+					.getTraceViewer().getDialogs().createDialog(
+							Dialog.VARIBLETRACINGHISTORY);
+			if (dialog != null) {
+				dialog.openDialog();
+			}
+			// Open the dialog
+		} else if (!dialog.isOpen()) {
+			dialog.openDialog();
+			// Set focus to the dialog
+		} else {
+			dialog.setFocus();
+		}
+	}
+}