Events API

Event handling API supported by widgets and various other objects.

Methods

off()

Parameters:

Returns: Object

Removes all listeners for all events from this widget. Supports chaining.

off(event)

Parameters:

• event: string

Returns: Object

Removes all listeners for event from this widget. Supports chaining.

off(event, listener)

Parameters:

• event: string
• listener: Function

Returns: Object

Removes all occurrences of listener that are bound to event from this widget, regardless of their context parameter. Supports chaining.

off(event, listener, context)

Parameters:

• event: string
• listener: Function
• context: Object

Returns: Object

Removes all occurrences of listener that are bound to event and context from this widget. Supports chaining.

on(event, listener)

Parameters:

• event: string
• listener: Function

Returns: Object

Adds the listener to the list of functions to be notified when event is fired. In the listener function, this will point to the object itself. Supports chaining.

on(event, listener, context)

Parameters:

• event: string
• listener: Function
• context: Object, in the listener function, this will point to this object.

Returns: Object

Adds a listener to the list of functions to be notified when event is fired. Supports chaining.

once(event, listener)

Parameters:

• event: string
• listener: Function

Returns: Object

Same as on, but removes the listener after it has been invoked by an event. Supports chaining.

once(event, listener, context)

Parameters:

• event: string
• listener: Function
• context: Object, in the listener function, this will point to this object.

Returns: Object

Same as on, but removes the listener after it has been invoked by an event. Supports chaining.