Executed when the tileGrid receives a 'click' event on a tile. The default implementation does nothing -- override to
perform some action when any record is clicked.
A record event handler can be specified either as a function to
execute, or as a string of script to evaluate. If the handler is defined as a string of script, all the parameters below
will be available as variables for use in the script.
If you want to cancel the click based on the parameters,
. Otherwise, return true so that the click event be registered with the tile.