Hi Kyle,

I've finally gotten around to implementing the feature you requested. The version of KPiX plugin in SVN head can now search a data file for a record with a specific event number. It can also skip to the next record of a certain type - you can ask for the next data record, for example. Use the "Jump..." button on the record loop toolbar. I also tweaked the KPiX browser a bit to display additional information, including the event number.

Note that KPiX files do not support random access (and it's not just a matter of file format or reader implementation, it's a consequence of combining fast and slow data streams in KPiX data). So "jumping" to a specific event is in fact a linear search (rewinding the file if necessary), and it can take quite a bit of time on a large file.

I've done some cleanup and refactoring on the whole package so a bit of care is indicated before using the current snapshot in analysis - I'm not aware of any problems but I have not done any release-like testing. Let me know if you find any problems. I don't plan on making another release until after the end of the beam test unless someone asks for it.

Best Regards,
- Dmitry.

> -----Original Message-----
> From: Kyle Travis [mailto:[log in to unmask]]
> Sent: Tuesday, July 23, 2013 10:28 AM
> To: Onoprienko, Dmitry
> Subject: RE: Display Changes
> 
> I'm inclined to say the event number. It is pretty arbitrary, and the
> ordinal might make more sense conceptually (in order to recognize how
> "far" into the run the current record is,) but we already have a few
> things in place that display the event number, so it might be easier to
> remain consistent if we stick with that. Thanks for forwarding this on
> though, I'm certainly not an expert on ways we intend to use the display
> so I'd like to hear what others think about this.
> 
> 
> On 2013/07/23 10:21, Dmitry Onoprienko wrote:
> > Kyle,
> >
> > What would you like to use as record index ? Event number as encoded
> > into
> > the data record ? Those seem to be somewhat arbitrary, but I can
> > enable
> > searching for the number specified by the user. That won't really be a
> > "jump" - Jas3 will have to read all intervening records - but it will
> > only
> > load the one the user wants (if present in the file). Or do you want
> > to use
> > record's ordinal number in the file, counting only data records ?
> > That’s
> > also doable, though might be a bit tricky (and occasionally confusing,
> > I
> > suspect).
> >
> > I'm forwarding this to the software mailing list since it might be of
> > general interest to people who are going to work on analysis.
> >
> > - Dmitry.
> >
> > From: Kyle Travis [mailto:[log in to unmask]]
> > Sent: Tuesday, July 23, 2013 9:57 AM
> > To: Onoprienko, Dmitry
> > Cc: Johnson, Tony; William McCann; Dylan Mead
> > Subject: Re: Display Changes
> >
> > Hi Dmitry,
> >
> > I was hoping to have some way to play through events in a controlled
> > way, so
> > that they are still visited in order, but the action completes either
> > when
> > the data record with the specified index is reached, or upon the end
> > of the
> > data file if that index is not valid. We have been using the "GO_N"
> > button
> > in these cases, but because it seems to be counting records in general
> > (which makes sense) and not only data records, there is some guesswork
> > involved -- i.e. if we are on event # 100 and want to reach # 200,
> > skipping
> > ahead 100 records may only get us to event # 85 if there were 15
> > non-data
> > records in between.
> >
> > I might be looking at this the wrong way, however, so if there is a
> > better
> > solution I would be open to it.
> >
> > Thanks,
> >
> > Kyle
> >
> > On Tue, Jul 23, 2013 at 9:44 AM, Dmitry Onoprienko
> > <[log in to unmask]> wrote:
> > Hello Kyle,
> >
> > Jas3 does have buttons for jumping to specific events, but those are
> > disabled for KPiX reader since KPiX data file format does not support
> > random
> > access. Or at least I thought it did not - was I wrong ? You can use
> > "GO_N"
> > button to process the next N events.
> >
> > - Dmitry.
> >
> > From: Kyle Travis [mailto:[log in to unmask]]
> > Sent: Tuesday, July 23, 2013 8:02 AM
> > To: Johnson, Tony; Onoprienko, Dmitry; William McCann; Dylan Mead
> > Subject: Display Changes
> >
> > Hi Tony and Dmitry,
> >
> > We wanted to let you know that we made some changes to the display and
> > pushed to the subversion repo last night. We are nearing completion
> > for the
> > main set of features, but something we are looking to add is a way to
> > jump
> > to a specific event number (which unfortunately is not accomplished
> > easily
> > by "fast-forwarding" events the normal way.) I know how to accomplish
> > this,
> > but I am not sure how to add a button somewhere in JAS3 for this task.
> > Is it
> > possible to add something to the kpixreader/browser toolbar, or to
> > make a
> > separate toolbar in a similar way?
> >
> > We will be heading over to your building to set up in those spaces
> > sometime
> > this morning, so if this is more easily discussed in person, that will
> > be
> > fine as well.
> >
> >
> > Kyle

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