Adding text to PDF using iText instead of CFPDF

Question

Hi,
I know this may seem a bit off topic being posted here but i'm asking this board since i'm a complete JAVA noob and i figure some of you CF folk might have had to do this before.
Anyway, about my question...i'm already adding a watermark image to a pdf using iText (CF8) thanks to the help of fellow poster (=cfSearching=).  What i'm looking for is the best way to go about adding some text to this same pdf.  I need to add 4 lines of text (with specific font and size) and center it underneath the added image.   Does anyone have a site they could point me to as to how to add formatted text and how to get the width of that text so as to align it correctly?  I've search Google and looked at a lot of JAVA code but being a JAVA noob it's tough to figure out exactly which libs and methods can be used to do this. 
Any help would be greatly appreciated!
-Michael

Answer 1

Hi again!
Well, the merged image is an idea but i'd rather have it be actual text so that it is at least copy/paste-able if viewed on a computer.
The four lines of text are dynamic (company name, broker name, phone number, email address) and limited to 40 characters.  Right now they are being added via CFPDF and DDX and use the following code in the DDX file to add it to the PDF.
<PDF result="DestinationFile">
     <PDF source="SourceFile">
          <Watermark
          rotation="0"
          opacity="100%"
          horizontalAnchor="#horzAnchor#"
          horizontalOffset="#horzOffset#"
          verticalAnchor="#vertAnchor#"
          verticalOffset="#vertOffset#"
          alternation="OddPages"
          >
               <StyledText text-align="center">
                    <p font="#font#" color="#color#" >#left(dCompany,maxlinechars)#</p>
                    <p font="#font#" color="#color#" >#left(dName,maxlinechars)#</p>
                    <p font="#font#" color="#color#" >#left(dPhone,maxlinechars)#</p>
                    <p font="#font#" color="#color#" >#left(dEmail,maxlinechars)#</p>
               </StyledText>
          </Watermark>
     </PDF>
</PDF>
Then using the created pdf from above, i use a slightly modified version of the cfscript code ( that uses iText) you provided me previously to add a logo image just above this text.  The only changes i made to it were resizing of the image and adding where to place it.  Here is that code:
<cfscript>                    
    fullPathToInputFile = "#tempdestfilepath#";
     writeoutput("<br>fullPathToInputFile=#fullPathToInputFile#");
    fullPathToWatermark = osFile("#request.logofilepath##qord.userlogo_file#",request.os);
     writeoutput("<br>fullPathToWatermark=#fullPathToWatermark#");
    fullPathToOutputFile =  "#destfilepath#";
     writeoutput("<br>fullPathToOutputFile=#fullPathToOutputFile#");
     ppi = 72; // points per inch
     watermark_x =  ceiling(#qord.pdftemplate_logo_x# * ppi);      // from bottom left corder of pdf
     watermark_y =  ceiling(#qord.pdftemplate_logo_y# * ppi);     // from bottom left corder of pdf
     fh = ceiling(0.75 * ppi);
     fw = ceiling(1.75 * ppi);
   if( not fileexists(fullPathToInputFile) )
              savedErrorMessage = savedErrorMessage & "<li>Input file pdf for logo add does not exist<br>#fullPathToInputFile#</li>";
   else
             try {
             // create PdfReader instance to read in source pdf
             pdfReader = createObject("java", "com.lowagie.text.pdf.PdfReader").init(fullPathToInputFile);
             totalPages = pdfReader.getNumberOfPages();
             // create PdfStamper instance to create new watermarked file
             outStream = createObject("java", "java.io.FileOutputStream").init(fullPathToOutputFile);
             pdfStamper = createObject("java", "com.lowagie.text.pdf.PdfStamper").init(pdfReader, outStream);
             // Read in the watermark image
             img = createObject("java", "com.lowagie.text.Image").getInstance(fullPathToWatermark);
                w = img.scaledWidth();
               h = img.scaledHeight();
               //$is[0] = w
               //$is[1] = h
               if( w >= h )
                  orientation = 0;
              else
                  orientation = 1;
                  fw = max_h;
                  fh = max_w;
              if ( w > fw || h > fh )
                  if( ( w - fw ) >= ( h - fh ) )
                      iw = fw;
                      ih = ( fw / w ) * h;
                  else
                      ih = fh;
                      iw = ( ih / h ) * w;
                  t = 1;
              else
                  iw = w;
                  ih = h;
                  t = 2;
             // adding content to each page
             i = 0;
             //while (i LT totalPages) {
                 i = i + 1;
                 content = pdfStamper.getOverContent( javacast("int", i) );
                 img.setAbsolutePosition(javacast("float", watermark_x), javacast("float", watermark_y));
                    if(t==1)
                         img.scaleAbsoluteWidth( javacast("float", iw) );
                         img.scaleAbsoluteHeight( javacast("float", ih) );
                 content.addImage(img);
                 WriteOutput("Watermarked page "& i &"<br>");
             //WriteOutput("Finished!");
             catch (java.lang.Exception e) {
             savedErrorMessage = savedErrorMessage & "<li>#e#</li>";
         // closing PdfStamper will generate the new PDF file
         if (IsDefined("pdfStamper")) {
             pdfStamper.close();
         if (IsDefined("outStream")) {
             outStream.close();
</cfscript>
The above code resized the image to a certain width/height if needed and adds it to the pdf. 
I just figured they might be a way to tap into one of the java objects that would allow adding the text.  Ideally, adding the text and image to some sort of 'bounding box' that would allow centering of the image and text in relation to that bounding box.  Or if there is no way to add to a bounding box, a way to get the horizontal length of the longest line of text so i could calculate a common centerline for the image and text.
I've attached the following pdf to show how the image and text would look together.  This example is not to scale but a similar image and text would be added to a separate pdf.
Thanks for you help.