Hi, I think you confusing a few things.
Starting from this page: http://xml.apache.org/fop/extensions.html (it could be a bit better and there will be some examples one day) The default extensions are svg and the bookmarks so you can just use these. To make your own extension you need to consider what you want to do first. 1. do you want to put a formatting object area in the output, eg. some text, block etc. 2. do you want a graphic in the output, ie. somthing that could be done with svg 3. do you want to do some document specific settings such as what the bookmarks does also what version are you using, this is about the latest release. If 1. then you need to do a similar sort of thing to all other fo objects. If 2. then you setup a class that can get a DOM and turn it into SVG. If 3. then it is a bit more difficult. It doesn't say to extend ExtensionObj, this is just an example. More below... On 2002.01.10 18:15 Software AG wrote: > Hi, there. > > Trying to create a FOP Extension I'm getting totally confused with the > docs. > The HTML document says to just have a look at org.apache.fop.extensions.* > and implement the ExtensionObj interface. ExtensionObj is not an > interface > but a class, and hardly documented. So all I know is I need to overload > the > > public Status layout(Area area) > > method. I have rendering code that eats a dom tree and spits out a > java.awt.Image or GIF or whatsoever. Looking at the SVG extension code > confused me more than it helped. From the list archives I could not > derive a > cookbook what to do. > > - What class do I have to extend: Area (like SVGArea) or ExtensionObj? You will likely need to extend FObj. > - How is this new class going to get the DOM tree inside the > fo:instream-foreign-object element? The same what that SVG gets the DOM > - How is this new class going to pass the rendered image to FOP? ?? If you want SVG for the output then just do what the SVG does, ie. put the SVG DOM into an SVGArea. > - How do I correctly register the new class so FOP will call it? As on the website "include the following file "/META-INF/services/org.apache.fop.fo.ElementMapping". In this file you need to put the fully qualified classname of your element mappings class. This class must implement the "org.apache.fop.fo.ElementMapping" interface." > - What happens if I cannot provide name spaces on the elements? You must have a separate namespace. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
