Bug 175664 [Mac] Unexpected internal exception occurs when invoke expression builder
Description: There are two problems: 1. "fx" button (Click this button to invoke Expression Builder) could not be displayed correctly, nothing displayed in the button. 2. Click on the button, an unexpected internal exception occurs. Version:2.2.0.v20070205 Steps to reproduce: 1.Insert a Data item to the layout. Click "fx" button to invoke the expression builder, although on Mac "fx" button could not display correctly. Error log: Argument cannot be null Plug-in Provider: Eclipse.org Plug-in Name: BIRT Designer UI Plug-in ID: org.eclipse.birt.report.designer.ui Error Code: Error.GUIException.invokedByUnexpectedException Error Message:Argument cannot be null
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
* http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *  Actuate Corporation  - initial API and implementation
 *******************************************************************************/
package org.eclipse.birt.report.designer.internal.ui.util;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.text.Bidi;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Stack;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.regex.Pattern;
import org.eclipse.birt.report.designer.core.model.SessionHandleAdapter;
import org.eclipse.birt.report.designer.core.runtime.GUIException;
import org.eclipse.birt.report.designer.internal.ui.dialogs.ImportLibraryDialog;
import org.eclipse.birt.report.designer.internal.ui.editors.IReportEditor;
import org.eclipse.birt.report.designer.internal.ui.editors.parts.DeferredGraphicalViewer;
import org.eclipse.birt.report.designer.internal.ui.editors.parts.GraphicalEditorWithFlyoutPalette;
import org.eclipse.birt.report.designer.internal.ui.editors.parts.event.ModelEventManager;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.editparts.DummyEditpart;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.editparts.GridEditPart;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.editparts.ListBandEditPart;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.editparts.ListEditPart;