IEvent<T> Interface

Definition

Represents a multicast event that provides adding and removing event handlers.

Delphi

type IEvent<T> = interface(IEvent)

The event handler type must be an instance procedural type such as TNotifyEvent.

Derived: ICollectionChangedEvent<T>

IInvokableEvent<T>

IInvokableNotifyEvent

INotifyEvent<T>

TNotifyEventImpl

TPropertyChangedEventImpl

CanInvoke	Returns True when the event will do anything because it is Enabled and contains any event handler. Otherwise returns False . (Inherited from IEvent)
Enabled	Gets the value indicates whether the multicast event is enabled, or sets the value to enable or disable the event. (Inherited from IEvent)
OnChanged	(Inherited from IEvent)
UseFreeNotification	Specifies if the event internally tracks if the event handlers are implemented by a TComponent descendant and automatically unsubscribes those when the implementing component is being destroyed. (Inherited from IEvent)

Add(T)	Adds an event handler to the list.
Clear	Clears all event handlers. (Inherited from IEvent)
GetCanInvoke	(Inherited from IEvent)
GetEnabled	(Inherited from IEvent)
GetOnChanged	(Inherited from IEvent)
GetUseFreeNotification	(Inherited from IEvent)
Remove(T)	Removes an event handler if it was added to the event.
RemoveAll(Pointer)	Removes all event handlers which were registered by an instance. (Inherited from IEvent)
SetEnabled(Boolean)	(Inherited from IEvent)
SetOnChanged(TNotifyEvent)	(Inherited from IEvent)
SetUseFreeNotification(Boolean)	(Inherited from IEvent)