Hi Georg,

I was just having another look at this and I realised something I hadn't
recognised before...

I have not come across a "multipass" factory during my FOP experiments.
Could you possibly explain the getMultipassFactory() method to me..?

Apologies if this is a very ignorant question.

Cheers,
Tom





Georg Datterl wrote:
>
> Hi Tom,
>
> I get the area tree using
>
>             FOUserAgent foUserAgent = getFopFactory().newFOUserAgent();
>             Transformer transformer =
> getMultipassFactory().newTransformer();
>             TransformerHandler handler =
> getMultipassFactory().newTransformerHandler();
>             DOMResult domResult = new DOMResult();
>             handler.setResult(domResult);
>
>             org.apache.fop.render.Renderer targetRenderer =
>             foUserAgent.getRendererFactory().createRenderer(
>                             foUserAgent, MimeConstants.MIME_PDF);
>
>             XMLRenderer renderer = new XMLRenderer();
>             renderer.mimicRenderer(targetRenderer);
>             renderer.setContentHandler(handler);
>             renderer.setUserAgent(foUserAgent);
>
>             foUserAgent.setRendererOverride(renderer);
>            
>             Fop fop =
> getFopFactory().newFop(MimeConstants.MIME_FOP_AREA_TREE, foUserAgent);
>             Result res = new SAXResult(fop.getDefaultHandler());
>             transformer.transform(source, res);
>             org.w3c.dom.Document doc = domResult.getNode();
>
> Then I get values from the tree through Xpath
>
> XPathFactory factory=XPathFactory.newInstance();
> XPath xPath=factory.newXPath();
> NodeList nl =
> (NodeList)xPath.evaluate("//block[@prod-id='"+DT_TAG+id+"']", doc,
> XPathConstants.NODESET);
> xPath.evaluate(".//block[@prod-id='"+L1_TAG+id+"']/@bpd", nl.item(i),
> XPathConstants.NUMBER)
>
> The blocks I'm interested in have well-known ids and I'm interested in
> more than one information below the node with id DT_TAGxx, that's why I
> use a nodelist. When you find a smarter way to get the information, please
> tell me, cause this xpath solution is not very fast in large documents...
>
> Regards,
>  
> Georg Datterl
>  
> ------ Kontakt ------
>  
> Georg Datterl
>  
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> -----Ursprüngliche Nachricht-----
> Von: TomWilcox [mailto:wilcox@hp.c...]
> Gesendet: Freitag, 10. Juli 2009 18:52
> An: fop-users@xmlg...
> Betreff: Area Tree Handling
>
>
> Hi,
>
> First of all, I am a FOP dummy. I can make PDFs from FO but I don't know
> about the inner workings.
>
> I have FOP 0.95 embedded in my Java application. I would like to construct
> an FO document and modify/examine the AreaTree for it on the fly.
>
> This is in an attempt to fill blocks (of set size and position) on a page
> with text/graphics and until the areatree info shows that block is full.
>
> I would like to do this as fast as possible and I thought this would imply
> the best route is to get hold of the areatree object in my application and
> modify/access the objects of interest. (Or, failing that, to get hold area
> tree xml fragments maybe)..
>
> Can anyone tell me how I might go about achieving this?
>
> Or even better, can anyone point me in the direction of any good
> tutorials/examples that show Java code using embedded FOP to generate an
> area tree object for an FO stream/file and then modify it with code..?
>
> That would be awesome :)
>
> Thanks in advance,
> Tom
> --
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>
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