Issue with adding textfield to pdfpcell

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Java

PDF

itextsharp

I'm using itext to generate editable Calendar pdf.

I'm trying to add TextField to the PdfPCell using this code,

//To create PdfPCell for a specific day

public PdfPCell getDayCell(Calendar calendar, Locale locale) {
    PdfPCell cell = new PdfPCell();
    cell.setPadding(3);
    // set the background color, based on the type of day
    if (isSunday(calendar))
        cell.setBackgroundColor(BaseColor.GRAY);
    else if (isSpecialDay(calendar))
        cell.setBackgroundColor(BaseColor.LIGHT_GRAY);
    else
        cell.setBackgroundColor(BaseColor.WHITE);
    // set the content in the language of the locale
    Chunk chunk = new Chunk(String.format(locale, "%1$ta", calendar), small);
    chunk.setTextRise(5);
    // a paragraph with the day
    Paragraph p = new Paragraph(chunk);
    // a separator
    p.add(new Chunk(new VerticalPositionMark()));
    // and the number of the day
    p.add(new Chunk(String.format(locale, "%1$te", calendar), normal));
    cell.addElement(p);
    cell.setCellEvent(new MyCellField(locale+""+calendar));
    cell.setFixedHeight(80);
    return cell;
}

// Adding TextField to the cellEvent

class MyCellField implements PdfPCellEvent {
protected String fieldname;
public MyCellField(String fieldname) {
    this.fieldname = fieldname;
}
public void cellLayout(PdfPCell cell, Rectangle rectangle, PdfContentByte[] canvases) {

    final PdfWriter writer = canvases[0].getPdfWriter();


    final TextField textField = new TextField(writer, rectangle, fieldname);
    textField.setAlignment(Element.ALIGN_TOP); 
    textField.setOptions(TextField.MULTILINE); 
    try {
        final PdfFormField field = textField.getTextField();
        writer.addAnnotation(field);
    } catch (final IOException ioe) {
        throw new ExceptionConverter(ioe);
    } catch (final DocumentException de) {
        throw new ExceptionConverter(de);
    }
}
}

When I render the calendar pdf, the Cell focus is vertical, not horizontal. Kindly help me to find out what I'm missing.

Refer

NOTE: Im using iText5

What I have tried:

I have tried,

float textboxheight = 12f;
Rectangle rect = rectangle;
rect.Bottom = rect.Top - textboxheight;

rect.Bottom is showing error "The final field Rectangle.BOTTOM cannot be assigned".