Re: [visad] Question about a spreadsheet-type application

 Hi Phillip,

There is a spreadsheet built into VisAD:

The visad/rabin/ program distributed as part of the
VisAD source JAR file is a simple example of how to use the
classes to build a custom spreadsheet. The visad/rabin/
program is a spreadsheet that doesn't use the classes in
but does include direct manipulation of a value (2-D cursor) in a
spreadsheet cell. Scroll down to the heading "Rainfall Estimation
Custom SpreadSheet" on the VisAD web page:

This web page lists a number of other examples that use
direct manipulation. You can an overview of VisAD
direct manipulation at:

and technical information about direct manipulation in
section 1.8 of:

Good luck,

  ----- Original Message -----
  From: "Phillip Kent"
  To: visad@xxxxxxxxxxxxxxxx
  Subject: [visad] Question about a spreadsheet-type application
  Date: Wed, 09 Sep 2009 18:12:36 +0100

  I just discovered VisAD and am very impressed by its capabilities,
  particularly in the Visualization Spreadsheet.

  I need to develop an application which is not like any of the VisAD
  examples, so I am unsure if VisAD is a viable or sensible choice to
  code with.

  I'm thinking about a spreadsheet where mostly the entries are
  simple numbers, but some entries may be (static) images, or
  possibly small (and few variable) data sets. For the simple number
  cells I need to do standard formula-based calculations. So it's a
  sort of 'multimedia spreadsheet' to be used for recording different
  kinds of data, and to be able to organise and 'play around' with
  the data. This is to support a learning application for
  decision-making with quantified (statistical) and unquantified data.

  The other specific thing I need is to be able to construct 2D
  charts from numerical entries in the spreadsheet, and to have
  direct manipulation of the values in the individual data cells by
  dragging the data point displayed in the chart [Excel had this as a
  built-in function prior to version Excel2007]. That's the basic, if
  there were neat ways to do more complex direct manipulation that
  would be a bonus.

  Thanks for any suggestions!

  - Phillip

  Dr Phillip Kent
  London Knowledge Lab - Institute of Education
  23 - 29 Emerald St
  London WC1N 3QS
  p.kent@xxxxxxxxx tel 020 7763 2156 mobile 07950 952034 , ++++++++
  "When you try to find the people, it always
  in the end comes down to somebody" Dos Passos

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