Inserting text behind existing text

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   I would like to open a PDF and add text to it.  I would like the text I add to be behind any existing text or graphics on the page.  I can't quite figure out how to do this!

Thanks,

Bob

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BobW Members Profile Find Members Posts Senior Member Joined: 27 Feb 13 Location: Minnesota Status: Offline Points: 64	Post Options Post Reply Quote BobW Report Post Thanks(0) Quote Reply Topic: Inserting text behind existing text Posted: 18 Mar 13 at 9:17PM
	I would like to open a PDF and add text to it. I would like the text I add to be behind any existing text or graphics on the page. I can't quite figure out how to do this! Thanks, Bob

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3524	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 18 Mar 13 at 10:18PM
	Hi Bob! QP offers extract functionalities. Please read here: http://www.debenu.com/docs/pdf_library_reference/Extraction.php There are options to extract with string positions included. So you can determine where's the text content on each pages. Additionally QP tells you the complete page dimensions and with GetOrigin tells you where to begin and SetMeasurementUnits you can tell QP about the units you wanna use. So you can calculate the region which should be still clear. Now you can use the drawing functionalities for your own text. Cheers, Ingo

BobW Members Profile Find Members Posts Senior Member Joined: 27 Feb 13 Location: Minnesota Status: Offline Points: 64	Post Options Post Reply Quote BobW Report Post Thanks(0) Quote Reply Posted: 19 Mar 13 at 4:05PM
	I'm familiar with the extract functions and I use them in other applications. For the job I am working on now, I need to place additional text in the PDF and make it look as if the text that is already there was printed on top of if. This is for artistic reasons. Is there a way to do this?

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3524	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 19 Mar 13 at 5:01PM
	So you need the position- and font-values from the extract-functions (chose the right options). Calculate a little bit with these values and draw onto the existing content.

AndrewC Members Profile Find Members Posts Moderator Group Joined: 08 Dec 10 Location: Geelong, Aust Status: Offline Points: 841	Post Options Post Reply Quote AndrewC Report Post Thanks(0) Quote Reply Posted: 21 Mar 13 at 8:05AM
	Bob, You could try something along the lines of the following QP.LoadFromFile (... QP.SelectPage(1); int cs = NewContentStream(); QP.SetOrigin(1); QP.AddStandardFont(4); QP.SetTextSize(30); QP.DrawText(20,20, "Hello World"); QP.MoveContentStream(cs, 1); QP.SaveToFile("newfile.pdf"); Whether this approach works or not will depend on how the PDF is created. If the first command of the PDF is to draw and fill a white rectangle the same size as the page then this approach will not work. Andrew

BobW Members Profile Find Members Posts Senior Member Joined: 27 Feb 13 Location: Minnesota Status: Offline Points: 64	Post Options Post Reply Quote BobW Report Post Thanks(0) Quote Reply Posted: 22 Mar 13 at 3:02PM
	Andrew, That does the trick! Thanks so much! Bob