Delphi ActiveX Requires Chilkat v11.7.0+

Page Numbers, Dates and the File Name in a PDF Watermark

See more PDF Watermark Examples

Demonstrates the placeholders a text watermark understands, each replaced per page as the watermark is added: {page} is the page number, {pages} the page count, {date:FORMAT} the current local date and time, and {filename} the name of the file that was loaded. Two braces give a literal brace. pageNumber.start sets what {page} is on the first page, which is how a numbering that ignores a cover is produced, and pageNumber.style formats both {page} and {pages} as decimal, romanUpper, romanLower, letterUpper or letterLower. Delphi ActiveX

var
success: Integer;
pdf: TChilkatPdf;
json: TChilkatJsonObject;
jsonOut: TChilkatJsonObject;
pdf2: TChilkatPdf;
json2: TChilkatJsonObject;

begin
success := 0;

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

//  The PDF used in this example is available at four_pages.pdf

pdf := TChilkatPdf.Create(Self);
success := pdf.LoadFile('qa_data/pdf/four_pages.pdf');
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;

json := TChilkatJsonObject.Create(Self);
json.UpdateString('type','text');
json.UpdateString('text','Page {page} of {pages}  -  printed {date:yyyy-MM-dd HH:mm}  -  {filename}');
json.UpdateString('id','pagefoot');
json.UpdateString('position.align','bottom');
json.UpdateNumber('position.margin','24');
json.UpdateNumber('font.size','9');
json.UpdateString('color','#505050');

jsonOut := TChilkatJsonObject.Create(Self);
success := pdf.Watermark('add',json.ControlInterface,jsonOut.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add('footer pages: ' + jsonOut.StringOf('pages'));

//  Roman numerals that start at i on page 2, so that a cover page is not numbered.
pdf2 := TChilkatPdf.Create(Self);
success := pdf2.LoadFile('qa_data/pdf/four_pages.pdf');
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf2.LastErrorText);
    Exit;
  end;
json2 := TChilkatJsonObject.Create(Self);
json2.UpdateString('type','text');
json2.UpdateString('text','- {page} -');
json2.UpdateString('id','roman');
json2.UpdateString('pages','2-');
json2.UpdateInt('pageNumber.start',1);
json2.UpdateString('pageNumber.style','romanLower');
json2.UpdateString('position.align','bottom');
json2.UpdateNumber('font.size','10');
success := pdf2.Watermark('add',json2.ControlInterface,jsonOut.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf2.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add('roman pages: ' + jsonOut.StringOf('pages'));

success := pdf.WriteFile('qa_output/four_pages_numbered.pdf');
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;

//  Sample output:

//  footer pages: 1-4
//  roman pages: 2-4