I would think, in order to give a progress indicator, FOP while running
would need to know where the end of the input is (how else could FOP
declare itself to be 25% done, 50% done, etc.). But FOP does not do
such preprocessing, it processes the data as it gets it (well, starting
at the end of each fo:page-sequence it finds), without knowledge of the
number of future fo:page-sequences to be found. So I don't think FOP
would ever know itself how much finished it is with its input, and hence
would not be able to report on it.
Also I believe the two parts you mention are not discrete, but happen
simultaneously (we use SAX processing internally.)
But in the future 1.0 version (not 0.20.5), you will be able to
programmatically override the FOEventHander (which signals the start/end
of most FO's occured while processing), and I think here you would be
able to set a counter/fire an event for the "end" of each
fo:page-sequence as it occurs, before calling the default processing.
If you were to preprocess the document separately and get a count of
fo:page-sequences to begin with--you can get a % done that way. Problem
is, however, it would be time consuming to run the "first part"
mentioned below another time just to get that total count. Also,
differing sizes of the fo:page-sequences would make that percentage
questionable.
Glen
alex wrote:
Hi,
I'm using FOP 0.20.5 embedded in a formatting project, where I have
XML + XSL = FO => PDF. Everything works fine, but I would like to
display a progress bar indicating transformation progress from
XML to XSL-FO (first part) and from XSL-FO to PDF (second part).
I have searched very intensively for a solution, but couldn't find
any way to determine the progress.
Does anyone have an idea on how to approach my problem ?
I thought about modifying the fop source at the point, where the
System.out gets the [INFO] about whats going on, so as to notify
my application thereof. But I haven't found that point yet.
Anyone a suggestion ?
thx for the help
Alex Dima
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