Event Handlers and Scope

Working with Event Types > About Events > Event Handlers and Scope

	Event Handlers and Scope

Event handlers can be placed at several different levels within the speech application:

In the AppRoot node - Event handlers placed in the AppRoot node act as global event handlers. That is, they are active and ready to handle events that occur anywhere, at any level, in the application.

See Setting Global Application Properties: AppRoot Node.

In any other node - Event handlers placed at the top level of any node other than the AppRoot node act as form-level event handlers. That is, they are active and ready to handle events that occur anywhere within the node in which they are placed.

In an item within a node - Event handlers attached to node items within a node act as field-level event handlers. That is, they are active and ready to handle events that occur only within the item to which they are attached.

Event handlers at a lower level take priority over event handlers at a higher level. In other words, suppose you have an event handler for No Match events at the field level, and you have another event handler for No Match items in the AppRoot node. If a No Match event occurs at the field level, the event handler at the field level takes precedence over the event handler in the AppRoot node.