Hi Doug and Mathias,
> I have a simple time series plot with some field (e.g. temperature)
> plotted vs. time for several surface stations. Auto scaling does the
> right thing when I add data to the Display and I seem to recall it doing
> the right thing when I remove DataReferences from the Display. However,
> now I am using the DataRenderer.toggle method to turn off my data. Even
> if I call the Display's reAutoScale method, it doesn't auto scale.
>
> Is this a bug? Should calling DataRenderer.toggle( false ) cause the
> Display to reAutoScale? Or should a call to reAutoScale at least look at
> the toggled state before using the data for auto scaling?
No, the reAutoScale() method only says to auto-scale the
next time data are transformed into geometry. Follow that
call by a call to DisplayImpl.reDisplayAll() to trigger the
transform.
> On a related note, I also recall that calling ScalarMap.setRange
> effectively turns off the auto scaling. Is there a way to turn auto
> scaling back on?
That's a good idea. It would require a new method in ScalarMap,
perhaps in the next release.
Mathias said:
> So the autoscaling does it's work on the first setting of the
> data via FlatField.setSamples( ... ). But if I later wanted to
> change the data via a new call to setSamples() no rescaling was
> done.
That's right: the DisplayImpl does not re-autoscale every time
data values change - VisAD would be slow if it did. But you can
explicitly ask for it by calling DisplayImpl.reAutoScale() before
you call setSamples().
Cheers,
Bill
