Bug 128317 group header and footer checkboxes
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/GroupDialog.java
/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.designer.internal.ui.dialogs.BaseDialog#initDialog()
	 */
	protected boolean initDialog( )
	{
		if ( inputGroup.getName( ) != null )
		{
			nameEditor.setText( inputGroup.getName( ) );
		}
		refreshColumnList( );
		setKeyExpression( inputGroup.getKeyExpr( ) );
		int index = getIntervalTypeIndex( inputGroup.getInterval( ) );
		intervalType.select( index );
		if ( index == 0 )
		{
			intervalRange.setEnabled( false );
			intervalBaseButton.setEnabled( false );
			intervalBaseText.setEnabled( false );
		}
		else
		{
			intervalRange.setEnabled( true );
			intervalRange.setSelection( inputGroup.getIntervalRange( ) );
			if ( getColumnType( ) == String.class )
			{
				intervalBaseButton.setEnabled( false );
				intervalBaseText.setEnabled( false );
			}