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nsIObserver

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This interface is implemented by an object that wants to observe an event corresponding to a topic. It is scriptable.

See also: nsIObserverService.

Methods

observe

Called when there is a notification for the topic aTopic. The object implementing this interface must have been registered with an observer service such as the nsIObserverService. If you expect multiple topics/subjects, your implementation is responsible for filtering. You should not modify, add, remove, or enumerate notifications in the implemention of observe.

Syntax:

void nsIObserver::observe(in nsISupports aSubject,
	in string aTopic,in wstring aData)  

Parameters:

aSubject: Notification specific interface pointer.

aTopic: The notification topic or subject.

aData: Notification specific wide string, depending on the subject event.

nsresult:

NS_OK if successful.