[yt-dev] Swapping out a data_source in a Plot Window

[Nathan Goldbaum]

Hi Matt,

Looking at the code it looks like we don't query the data source for anything at initialization besides the location of the maximum density point if the user doesn't provide a center for the plot.

All the relevant metadata is actually obtained from the data_source attached to the frb object.  The frb is regenerated every time a function wrapped with the invalidate_data decorator is called so I don't think you'll run into issues if you start swapping out data_sources.

TimeSeriesPlotWindow sounds like a great idea.  As you're probably aware, that's just a hop skip and a jump away from having something like:

TimeSeriesPlotWindow.write_movie('awesome_movie.mp4').

Happy hacking :)

Cheers,

Nathan

On Oct 27, 2012, at 3:59 PM, Matthew Turk wrote:

> Hi all (especially Nathan),
> 
> Looking over the Plot Window code, I think this is okay, but I wanted
> to make sure that there wasn't something I was missing.  Is there any
> reason I can't swap out a data_source in a plot window, invalidate the
> data, and then save()?  Or will there be lingering hints of the old
> data source, and the old parameter file?
> 
> The context for this is that I'm adding a TimeSeriesPlotWindow, and I
> want to try to retain as much as I can as I switch between datasets.
> Annotations, widht (in code units), limits, etc etc.
> 
> Thanks,
> 
> Matt
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