Bug 183308 IllegalArgumentException occurs after insert a empty group on a List report item[0001]
Description: IllegalArgumentException occurs after insert a empty group on a List report item[0001] Build number: 2.2.0.v20070419-0945 Steps to reproduce: 1, Insert a list 2, Insert a group on the list, only specify the Group On: "aa" Expected result: No exception Actual result: IllegalArgumentException occurs Error log: java.lang.IllegalArgumentException: Argument cannot be null at org.eclipse.swt.SWT.error(SWT.java:3483) at org.eclipse.swt.SWT.error(SWT.java:3422) at org.eclipse.swt.SWT.error(SWT.java:3393) at org.eclipse.swt.widgets.Widget.error(Widget.java:432) at org.eclipse.swt.widgets.Text.setText(Text.java:1793) at org.eclipse.birt.report.designer.ui.dialogs.GroupDialog$6.focusLost(GroupDialog.java:485) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:136) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:962)
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/GroupDialog.java
if ( expressionBuilder.open( ) == OK )
				{
					tocEditor.setText( expressionBuilder.getResult( ).trim( ) );
				}
			}
		} );
		new Label( group, SWT.NONE ).setText( Messages.getString( "GroupDialog.Dialog.TOCStyle" ) ); 
		tocStyleType = new Combo( group, SWT.DROP_DOWN | SWT.READ_ONLY );
		gd = new GridData( );
		gd.widthHint = 200;
		tocStyleType.setLayoutData( gd );
		tocStyleType.setItems( sytleChoicesAll );
	}
	/**
	 * Creates the title area
	 * 
	 * @param parent
	 *            the parent composite
	 */
	private void createTitleArea( Composite parent )
	{
		int heightMargins = 3;
		int widthMargins = 8;
		final Composite titleArea = new Composite( parent, SWT.NONE );
		FormLayout layout = new FormLayout( );
		layout.marginHeight = heightMargins;
		layout.marginWidth = widthMargins;
		titleArea.setLayout( layout );
		Display display = parent.getDisplay( );
		Color background = JFaceColors.getBannerBackground( display );