previewTextBox.setText( "" );
previewTextBox.setText( defaultDateTime );
	private void createCustomPreviewPart( Composite parent )	{		Group group = new Group( parent, SWT.NONE );		group.setText( LABEL_PREVIEW_GROUP ); //$NON-NLS-1$		if ( pageAlignment == PAGE_ALIGN_HORIZONTAL )		{			group.setLayoutData( new GridData( GridData.FILL_BOTH ) );			group.setLayout( new GridLayout( 1, false ) );		}		else		{			group.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );			group.setLayout( new GridLayout( 2, false ) );		}		new Label( group, SWT.NONE ).setText( LABEL_PREVIEW_DATETIME ); //$NON-NLS-1$		previewTextBox = new Text( group, SWT.SINGLE | SWT.BORDER );		previewTextBox.setText( "" ); //$NON-NLS-1$		GridData data = new GridData( GridData.FILL_HORIZONTAL );		if ( pageAlignment == PAGE_ALIGN_HORIZONTAL )		{			data.horizontalIndent = 10;		}		previewTextBox.setLayoutData( data );		previewTextBox.addModifyListener( new ModifyListener( ) {			public void modifyText( ModifyEvent e )			{				setDefaultPreviewText( previewTextBox.getText( ) );				if ( hasLoaded )				{					updatePreview( );				}				if ( StringUtil.isBlank( previewTextBox.getText( ) ) )				{					guideLabel.setText( "" ); //$NON-NLS-1$				}				else				{					guideLabel.setText( ENTER_DATE_TIME_GUIDE_TEXT );				}			}		} );		if ( pageAlignment == PAGE_ALIGN_VIRTICAL )		{			new Label( group, SWT.NONE );		}		guideLabel = new Label( group, SWT.NONE );		guideLabel.setText( "" ); //$NON-NLS-1$		Font font = JFaceResources.getDialogFont( );		FontData fData = font.getFontData( )[0];		fData.setHeight( fData.getHeight( ) - 1 );		guideLabel.setFont( new Font( Display.getCurrent( ), fData ) );		data = new GridData( GridData.FILL_HORIZONTAL );		data.horizontalIndent = 10;		guideLabel.setLayoutData( data );		Label label = new Label( group, SWT.NONE );		label.setText( LABEL_PREVIEW_LABEL ); //$NON-NLS-1$		label.setLayoutData( new GridData( ) );		cusPreviewLabel = new Label( group, SWT.CENTER				| SWT.HORIZONTAL				| SWT.VIRTUAL );		cusPreviewLabel.setText( "" ); //$NON-NLS-1$		data = new GridData( GridData.FILL_BOTH );		data.horizontalSpan = 1;		cusPreviewLabel.setLayoutData( data );	}