using System;

using iTextSharp.text;

using iTextSharp.text.pdf;

using System.IO;

namespace iTextSharp.Demo

{

/**//// <summary>

/// Making a document with a header containing 'page x of y' and with a watermark on every page.

/// </summary>

    public class PageNumbersWatermark : IPdfPageEvent

{

/**//** An Image that goes in the header. */

public Image headerImage;

/**//** The headertable. */

public PdfPTable table;

/**//** The Graphic state */

public PdfGState gstate;

/**//** A template that will hold the total number of pages. */

public PdfTemplate tpl;

/**//** The font that will be used. */

public BaseFont helv;

public PageNumbersWatermark()

{

try

{

// step 1: creating the document

                Document doc = new Document(PageSize.A4, , , , );

// step 2: creating the writer

PdfWriter writer = PdfWriter.GetInstance(doc, new FileStream("pageNumbersWatermark.pdf",FileMode.Create));

// step 3: initialisations + opening the document

                writer.PageEvent =new PageNumbersWatermark();

doc.Open();

// step 4: adding content

                string text = "some padding text ";

for (int k = ; k < ; ++k)

text += text;

Paragraph p = new Paragraph(text);

p.Alignment=(Element.ALIGN_JUSTIFIED);

doc.Add(p);

// step 5: closing the document

                doc.Close();

}

catch ( Exception e )

{

System.Diagnostics.Debug.WriteLine(e.StackTrace);

}

}

IPdfPageEvent Members#region IPdfPageEvent Members

public void OnOpenDocument(PdfWriter writer, Document document)

{

try

{

// initialization of the header table

                headerImage = Image.GetInstance("logo.gif");

table = new PdfPTable();

Phrase p = new Phrase();

Chunk ck = new Chunk("lowagie.com\n", new Font(Font.TIMES_ROMAN, , Font.BOLDITALIC, Color.BLUE));

p.Add(ck);

ck = new Chunk("Ghent\nBelgium", new Font(Font.HELVETICA, , Font.NORMAL, Color.DARK_GRAY));

p.Add(ck);

table.DefaultCell.BackgroundColor=(Color.YELLOW);

table.DefaultCell.BorderWidth=();

table.AddCell(p);

table.DefaultCell.HorizontalAlignment=(Element.ALIGN_RIGHT);

table.AddCell(new Phrase(new Chunk(headerImage, , )));

// initialization of the Graphic State

                gstate = new PdfGState();

gstate.FillOpacity=(0.3f);

gstate.StrokeOpacity=(0.3f);

// initialization of the template

                tpl = writer.DirectContent.CreateTemplate(, );

tpl.BoundingBox=(new Rectangle(-, -, , ));

// initialization of the font

                helv = BaseFont.CreateFont("Helvetica", BaseFont.WINANSI, false);

}

catch(Exception e)

{

throw e;

}

}

public void OnCloseDocument(PdfWriter writer, Document document)

{

tpl.BeginText();

tpl.SetFontAndSize(helv, );

tpl.SetTextMatrix(, );

tpl.ShowText("" + (writer.PageNumber - ));

tpl.EndText();

}

public void OnParagraph(PdfWriter writer, Document document, float paragraphPosition)

{

// TODO:  Add PageNumbersWatermark.OnParagraph implementation

        }

public void OnEndPage(PdfWriter writer, Document document)

{

PdfContentByte cb = writer.DirectContent;

cb.SaveState();

// write the headertable

            table.TotalWidth=(document.Right - document.Left);

table.WriteSelectedRows(, -, document.Left, document.PageSize.Height - , cb);

// compose the footer

            String text = "Page " + writer.PageNumber + " of ";

float textSize = helv.GetWidthPoint(text, );

float textBase = document.Bottom - ;

cb.BeginText();

cb.SetFontAndSize(helv, );

// for odd pagenumbers, show the footer at the left

            if ((writer.PageNumber & ) == )

{

cb.SetTextMatrix(document.Left, textBase);

cb.ShowText(text);

cb.EndText();

cb.AddTemplate(tpl, document.Left + textSize, textBase);

}

// for even numbers, show the footer at the right

            else

{

float adjust = helv.GetWidthPoint("", );

cb.SetTextMatrix(document.Right - textSize - adjust, textBase);

cb.ShowText(text);

cb.EndText();

cb.AddTemplate(tpl, document.Right - adjust, textBase);

}

cb.SaveState();

// draw a Rectangle around the page

            cb.SetColorStroke(Color.ORANGE);

cb.SetLineWidth();

cb.Rectangle(, , document.PageSize.Width - , document.PageSize.Height - );

cb.Stroke();

cb.RestoreState();

// starting on page 3, a watermark with an Image that is made transparent

            if (writer.PageNumber >= )

{

cb.SetGState(gstate);

cb.SetColorFill(Color.RED);

cb.BeginText();

cb.SetFontAndSize(helv, );

cb.ShowTextAligned(Element.ALIGN_CENTER, "Watermark Opacity " + writer.PageNumber, document.PageSize.Width / , document.PageSize.Height / , );

cb.EndText();

try

{

cb.AddImage(headerImage, headerImage.Width, , , headerImage.Height, , );

}

catch(Exception e)

{

throw e;

}

cb.RestoreState();

}

}

public void OnSection(PdfWriter writer, Document document, float paragraphPosition, int depth, Paragraph title)

{

// TODO:  Add PageNumbersWatermark.OnSection implementation

        }

public void OnSectionEnd(PdfWriter writer, Document document, float paragraphPosition)

{

// TODO:  Add PageNumbersWatermark.OnSectionEnd implementation

        }

public void OnParagraphEnd(PdfWriter writer, Document document, float paragraphPosition)

{

// TODO:  Add PageNumbersWatermark.OnParagraphEnd implementation

        }

public void OnGenericTag(PdfWriter writer, Document document, Rectangle rect, string text)

{

// TODO:  Add PageNumbersWatermark.OnGenericTag implementation

        }

public void OnChapterEnd(PdfWriter writer, Document document, float paragraphPosition)

{

// TODO:  Add PageNumbersWatermark.OnChapterEnd implementation

        }

public void OnChapter(PdfWriter writer, Document document, float paragraphPosition, Paragraph title)

{

// TODO:  Add PageNumbersWatermark.OnChapter implementation

        }

public void OnStartPage(PdfWriter writer, Document document)

{

if (writer.PageNumber < )

{

PdfContentByte cb = writer.DirectContentUnder;

cb.SaveState();

cb.SetColorFill(Color.PINK);

cb.BeginText();

cb.SetFontAndSize(helv, );

cb.ShowTextAligned(Element.ALIGN_CENTER, "My Watermark Under " + writer.PageNumber, document.PageSize.Width / , document.PageSize.Height / , );

cb.EndText();

cb.RestoreState();

}

}

#endregion

}

}