Hi Eric, take a look at http://svn.apache.org/viewvc/pdfbox/trunk/pdfbox/src/main/java/org/apache/pdfbox/OverlayPDF.java?view=markup how to work with Over/Under content.
Kind regards Maruan Sahyoun Am 20.03.2013 um 09:54 schrieb Eric Chow <[email protected]>: > Dear Maruan, > > Thank you very much. It works fine. > I tried iText before and it can draw a rectangle by using UnderContent! > > Is it possible to do this in PDFBox? > > Best regards, > Eric > > > > > > > On Wed, Mar 20, 2013 at 3:34 PM, Maruan Sahyoun <[email protected]>wrote: > >> Hi Eric, >> >> a slightly enhanced sample with transparency. >> >> >> // For simplicity the code provided doesn't have any null >> checks or >> // exception handling !! >> >> PDDocument document = PDDocument.load(...); >> PDPage page = (PDPage) >> document.getDocumentCatalog().getAllPages().get(0); >> >> // The transparency, opacity of graphic objects can't be set >> directly on the drawing commands. >> // Instead we need to define a graphic state which will become >> part of the >> // resources. That state can be called later prior to doing >> the graphic operations. >> // That's part of the ISO/PDF specification [ISO-32000: 8.4.1] >> >> /* --------- Set up the graphic state -------------- */ >> >> // Define a new extended graphic state >> PDExtendedGraphicsState extendedGraphicsState = new >> PDExtendedGraphicsState(); >> // Set the transparency/opacity >> extendedGraphicsState.setNonStrokingAlphaConstant(0.8f); >> // Get the page resources. >> PDResources resources = page.findResources(); >> // Get the defined graphic states. >> Map graphicsStateDictionary = resources.getGraphicsStates(); >> // Add the new state definition. The name is the reference we >> need later on. >> graphicsStateDictionary.put("TransparentState", >> extendedGraphicsState); >> resources.setGraphicsStates(graphicsStateDictionary); >> >> /* --------- End of setup -------------------------- */ >> >> // Now we will be able to call the state definition before >> doing the drawing >> PDPageContentStream contentStream = new >> PDPageContentStream(document, page,true,true); >> // Call the graphic state using the name defined >> contentStream.appendRawCommands("/TransparentState gs\n"); >> contentStream.setNonStrokingColor(Color.yellow); >> contentStream.fillRect(100, 100, 200, 200); >> contentStream.close(); >> document.save(...); >> document.close(); >> >> >> Kind regards >> >> Maruan Sahyoun >> >> Am 20.03.2013 um 02:53 schrieb Eric Chow <[email protected]>: >> >>> Hi Maruan, >>> >>> Thanks for your example. But I don't want to using annotation since it >> can >>> be deleted. >>> >>> I want to really highlight the text by giving the co-ordinate? Would you >>> please to show me a simple example? >>> >>> Best regards, >>> Eric >>> >>> >>> >>> >>> On Tue, Mar 19, 2013 at 3:21 PM, Maruan Sahyoun <[email protected] >>> wrote: >>> >>>> Hi Eric, >>>> >>>> I did something similar for one of our customers. I didn't use a >> rectangle >>>> but a highlight annotation. A sample for annotations can be found at [1] >>>> >>>> Kind regards >>>> >>>> Maruan Sahyoun >>>> >>>> >>>> >> http://svn.apache.org/repos/asf/pdfbox/branches/before-maven-layout/src/org/pdfbox/examples/pdmodel/Annotation.java >>>> >>>> Am 19.03.2013 um 03:42 schrieb Eric Chow <[email protected]>: >>>> >>>>> Hello, >>>>> >>>>> How can I add a transparent yellow rectangle to a specific co-ordinate >>>>> (llx, lly, urx, ury) into an existed PDF? >>>>> >>>>> >>>>> In fact, I want to highlight some text that I know the exact position >> in >>>>> the PDF. Would you please to teach me? >>>>> >>>>> >>>>> Best regards, >>>>> Eric >>>> >>>> >> >>
