diff -r ed1c9f64298a -r 5b9d4d8641ce trace/traceviewer/com.nokia.traceviewer/src/com/nokia/traceviewer/dialog/BaseDialog.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/trace/traceviewer/com.nokia.traceviewer/src/com/nokia/traceviewer/dialog/BaseDialog.java	Wed Jun 23 14:49:59 2010 +0300
@@ -0,0 +1,173 @@
+/*
+ * 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:
+ *
+ * Base class for own dialogs
+ *
+ */
+package com.nokia.traceviewer.dialog;
+
+import org.eclipse.jface.dialogs.TrayDialog;
+import org.eclipse.swt.graphics.Point;
+import org.eclipse.swt.graphics.Rectangle;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Control;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.ui.PlatformUI;
+
+import com.nokia.traceviewer.TraceViewerHelpContextIDs;
+import com.nokia.traceviewer.engine.TraceViewerDialog;
+
+/**
+ * Base class for own dialogs
+ * 
+ */
+public abstract class BaseDialog extends TrayDialog implements
+		TraceViewerDialog {
+
+	/**
+	 * Integer value indicating not defined
+	 */
+	protected static final int NOT_DEFINED = -1;
+
+	/**
+	 * Composite in this dialog
+	 */
+	protected Composite composite;
+
+	/**
+	 * Old rectangle used when returning to same position
+	 */
+	private Rectangle oldRectangle;
+
+	/**
+	 * Constructor
+	 * 
+	 * @param parent
+	 *            parent shell
+	 * @param style
+	 *            style bits
+	 */
+	public BaseDialog(Shell parent, int style) {
+		super(parent);
+		setShellStyle(style);
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see org.eclipse.jface.dialogs.TrayDialog#close()
+	 */
+	@Override
+	public boolean close() {
+		saveSettings();
+		boolean close = super.close();
+		return close;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see org.eclipse.jface.window.Window#open()
+	 */
+	@Override
+	public int open() {
+		Shell shell = getShell();
+		if (shell == null || shell.isDisposed()) {
+			shell = null;
+			// create the window
+			create();
+		}
+
+		shell = getShell();
+
+		// Move the dialog to the center of the top level shell.
+		Rectangle shellBounds = getParentShell().getBounds();
+		Point dialogSize = shell.getSize();
+		int middleX = shellBounds.x + ((shellBounds.width - dialogSize.x) / 2);
+		int middleY = shellBounds.y + ((shellBounds.height - dialogSize.y) / 2);
+		shell.setLocation(middleX, middleY);
+
+		// Restore settings
+		restoreSettings();
+
+		return super.open();
+	}
+
+	/**
+	 * Saves user input settings
+	 */
+	protected void saveSettings() {
+		// Save the old location
+		Shell shell = getShell();
+		if (shell != null && !shell.isDisposed()) {
+			oldRectangle = shell.getBounds();
+		}
+	}
+
+	/**
+	 * Restores user input settings
+	 */
+	protected void restoreSettings() {
+		// Restore the location of the dialog
+		Shell shell = getShell();
+		if (oldRectangle != null && shell != null) {
+			shell.setBounds(oldRectangle);
+		}
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see
+	 * org.eclipse.jface.dialogs.Dialog#createDialogArea(org.eclipse.swt.widgets
+	 * .Composite)
+	 */
+	@Override
+	protected Control createDialogArea(Composite parent) {
+		this.composite = (Composite) super.createDialogArea(parent);
+
+		// Set help
+		PlatformUI.getWorkbench().getHelpSystem().setHelp(getShell(),
+				TraceViewerHelpContextIDs.ACTIONS);
+
+		// Create dialog contents
+		createDialogContents();
+
+		// Create action listeners
+		createActionListeners();
+
+		return composite;
+	}
+
+	/**
+	 * This method creates dialog contents. Subclasses must implement.
+	 */
+	abstract protected void createDialogContents();
+
+	/**
+	 * This method creates action listeners for controls in this dialog.
+	 * Subclasses must implement.
+	 */
+	abstract protected void createActionListeners();
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see com.nokia.traceviewer.engine.TraceViewerDialog#openDialog()
+	 */
+	public void openDialog() {
+		open();
+	}
+}