Bug 128317 group header and footer checkboxes
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/GroupDialog.java
intervalBaseText.setEnabled( intervalBaseButton.getEnabled( )
						&& intervalBaseButton.getSelection( ) );
			}
		} );
		
		intervalRange = new Spinner( intervalRangeArea, SWT.NONE );
		intervalRange.setLayoutData( new GridData( GridData.HORIZONTAL_ALIGN_FILL ) );
		intervalRange.setMinimum( 0 );
		intervalRange.setMaximum( Integer.MAX_VALUE );
		intervalRange.setStep( 1 );
		
		intervalBaseButton = new Button( composite, SWT.CHECK );
		intervalBaseButton.setText( GROUP_DLG_INTERVAL_BASE_LABEL ); 
		intervalBaseButton.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		intervalBaseButton.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				intervalBaseText.setEnabled( intervalBaseButton.getSelection( ) );
			}
		} );
		intervalBaseText = new Text( composite, SWT.SINGLE | SWT.BORDER );
		intervalBaseText.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		hideDetail = new Button( composite, SWT.CHECK );
		hideDetail.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		hideDetail.setText( GROUP_DLG_HIDE_DETAIL );
	}
	/**
	 * Creates the group area
	 * 
	 * @param parent