Bug 390669 [Accessibility]Press 'Tab' doesn't focus on the next report item when adding relative period aggregation.
xtab/org.eclipse.birt.report.item.crosstab.ui/src/org/eclipse/birt/report/item/crosstab/internal/ui/dialogs/CrosstabBindingDialogHelper.java
}
				}
			}
		}
		composite.layout( true, true );
		setContentSize( composite );
	}
	/**
	 * Creates the label control part of an argument info.
	 * 
	 * @param lblParam
	 *            The Label control
	 * @param displayName
	 *            The display text
	 * @param width
	 *            the width hint of the control
	 * @param isPlacedAfter
	 *            before or after the Period part
	 */
	private void createPeriodLabelPart( Label lblParam, String displayName,
			boolean isPlacedAfter )
	{
		lblParam = new Label( calculationComposite, SWT.NONE );
		lblParam.setText( displayName + ( isPlacedAfter ? "" : ":" ) ); 
		
		
		GridData gd = new GridData( );
		gd.widthHint = lblParam.computeSize( SWT.DEFAULT, SWT.DEFAULT ).x;