Re: Problem with DataReferenceImp.setData()

  • To: Jim Koutsovasilis <jimk@xxxxxxxxxx>
  • Subject: Re: Problem with DataReferenceImp.setData()
  • From: Bill Hibbard <billh@xxxxxxxxxxxxx>
  • Date: Thu, 1 May 2003 21:55:54 -0500 (CDT)
Hi Jim,

You can make it work OK by inserting:




I will have to look into whether this should be necessary,
but am travelling right now and will have to look into it
later. The reAutoScale() sets a correct setRange() for the
ScalarMap to RGBA, which does not get set for the UnionSet.


On Fri, 2 May 2003, Jim Koutsovasilis wrote:

> Hello,
> we are having a problem which involves a data reference
> being used for a UnionSet, and then for a FlatField.
> When the data reference's setData() is initially passed a
> UnionSet, the data is displayed.  Sometime later, the
> data reference's setData() is called again, but this time
> a FlatField is passed to it.
> The results are inconsistant.  Sometimes the FlatField
> is displayed, and sometimes it isn't.
> Attached is a sample program (
> which illustrates the problem.
> You can run it in 2 ways:
>  > java DataRefBug
> - will display the UnionSet data first (a cross).  Click on
>   the "Change Data" button, and the data reference's
>   setData() is passed a FlatField.  In all our tests, the
>   visad window goes black, and the FlatField is not shown.
> OR
>  > javaDataRefBug 0
> - will display the FlatField first.  Click on the "Change Data"
>    button, and the data reference's setData() is passed a
>    UnionSet.  In all our tests, this works and the UnionSet
>    data is shown.
> You can continue to click the "Change Data" button to cycle
> between the UnionSet data and the FlatField data.
> Does anyone have any ideas?
> Why does the display correctly update when the FlatField
> is shown first and not when the UnionSet is shown first?
> Thanks,
> Jim.
> ---
> Jim Koutsovasilis
> Bureau of Meteorology, Australia
> jimk@xxxxxxxxxx

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