using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using iTextSharp.text;
using iTextSharp.text.pdf;

namespace Sleis.Pdf
{
   
    public class PageEventHelper : PdfPageEventHelper
    {
        PdfContentByte cb;
        PdfTemplate template;
        private Font defaultFont = new iTextSharp.text.Font(ElementWriter.DEFAULT_FONT_FAMILY, 9);

        public override void OnOpenDocument(PdfWriter writer, Document document)
        {
            cb = writer.DirectContent;
            template = cb.CreateTemplate(50, 50);
        }

        public override void OnEndPage(PdfWriter writer, Document document)
        {
            base.OnEndPage(writer, document);

            int pageN = writer.PageNumber;
            String text = "Page " + pageN.ToString() + " of ";
          
            //float len = defaultFont.BaseFont.GetWidthPoint(text, defaultFont.Size);           
            float len = defaultFont.GetCalculatedBaseFont(false).GetWidthPoint(text, defaultFont.Size);
            iTextSharp.text.Rectangle pageSize = document.PageSize;

            cb.SetRGBColorFill(100, 100, 100);

            cb.BeginText();
            cb.SetFontAndSize(defaultFont.GetCalculatedBaseFont(false), defaultFont.Size);
            cb.SetTextMatrix(document.LeftMargin, pageSize.GetBottom(document.BottomMargin-10));
            cb.ShowText(text);

            cb.EndText();

            cb.AddTemplate(template, document.LeftMargin + len, pageSize.GetBottom(document.BottomMargin-10));
        }

        public override void OnCloseDocument(PdfWriter writer, Document document)
        {
            base.OnCloseDocument(writer, document);

            template.BeginText();
            template.SetFontAndSize(defaultFont.GetCalculatedBaseFont(false), defaultFont.Size);
            template.SetTextMatrix(0, 0);
            template.ShowText("" + (writer.PageNumber - 1));
            template.EndText();
        }
    }
}