setCategory( null );
setCategory( DesignChoiceConstants.NUMBER_FORMAT_TYPE_UNFORMATTED );
	private void updatePreview( )	{		markDirty( hasLoaded );		if ( hasLoaded )		{// avoid setting pattern from controls when the typechoicer is			// selected			// before loading.			setFmtPatternFromControls( );		}		String category = getCategory4DisplayName( typeChoicer.getText( ) );		if ( DesignChoiceConstants.NUMBER_FORMAT_TYPE_UNFORMATTED.equals( category ) )		{			setCategory( null );			setPattern( null );		}		else		{			FormatNumberPattern fmtPattern = getFmtPattern4Category( category );			setCategory( fmtPattern.getCategory( ) );			setPattern( fmtPattern.getPattern( ) );		}		doPreview( getCategory( ), getPattern( ) );	}