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#### A.10.1.10 Send Row Index

Configuration for Send Row Index action

The Send Row Index action sends a message to other SAMP applications giving the row index of the activated row. This is in general only useful to other applications if they are already aware of the table whose row indices are being communicated like this, so a usual pattern of usage would be first to send the table to one or several external applications, and then to set up this action to indicate which rows are being selected. If it is known that the table in question has never been communicated to other applications, the action will be disabled. The message sent has the MType `table.highlight.row`, so at least one external SAMP client subscribed to such messages must be registered.

Suitable clients for use with this action include image viewers such as Aladin, GAIA and SAOImage DS9. If you send a table to one of (e.g. using the Broadcast Table () button in the Control Window toolbar) and then set up this action to send row indices, then the image viewer will plot the catalogue positions over its displayed imagery, and whenever a row is activated within TOPCAT, will highlight the corresponding plotted point in some way.

Configuration:

Target Client
  Determines which external client(s) to send the row indices to. The default is "All Clients" which will send it to all eligible applications, but you can select just one. Clicking the selector also serves to indicate which clients capable of acting on this message type are currently registered. If there are none, the action will be disabled.

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TOPCAT - Tool for OPerations on Catalogues And Tables
Starlink User Note253
TOPCAT web page: http://www.starlink.ac.uk/topcat/
Author email: m.b.taylor@bristol.ac.uk
Mailing list: topcat-user@jiscmail.ac.uk