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
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.