Data Update Mechanism

When the data contained in a data item changes (usually as the result of the application of a data-centric operation), all visualizations that depend on that data item are automatically notified of the change via a call to the visualization object's OnDataChangeUpdate method. (See Creating an OnDataChangeUpdate Method for details.)

The data update mechanism is automatic; if you have assigned iTool data types (and, optionally, parameter names) to your data objects, the data matching mechanisms of the IDLitParameter interface will ensure that updates happen when necessary. Unless you have modified core iTool functionality, you do no need to handle data change updates yourself.