Module javafx.base
Package javafx.event

Class EventType<T extends Event>

  • Type Parameters:
    T - the event class to which this type applies
    All Implemented Interfaces:
    Serializable
    public final class EventType<T extends Event>
extends Object
implements Serializable
    This class represents a specific event type associated with an Event.

    Event types form a hierarchy with the ROOT (equals to Event.ANY) as its root. This is useful in event filter / handler registration where a single event filter / handler can be registered to a super event type and will be receiving its sub type events as well. Note that you cannot construct two different EventType objects with the same name and parent.

    Note about deserialization: All EventTypes that are going to be deserialized (e.g. as part of Event deserialization), need to exist at the time of deserialization. Deserialization of EventType will not create new EventType objects.

    Since:
    JavaFX 2.0
    See Also:
    Serialized Form

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static EventType<Event> ROOT
      The root event type.

    • Constructor Summary

      Constructors 
      Constructor Description
      EventType()
      Deprecated.
      Do not use this constructor, as only one such EventType can exist
      EventType​(String name)
      Constructs a new EventType with the specified name and the EventType.ROOT as its super type.
      EventType​(EventType<? super T> superType)
      Constructs a new EventType with the specified super type and the name set to null.
      EventType​(EventType<? super T> superType, String name)
      Constructs a new EventType with the specified super type and name.

    • Field Detail

      • ROOT

        public static final EventType<Event> ROOT
        The root event type. All other event types are either direct or indirect sub types of it. It is also the only event type which has its super event type set to null.

    • Constructor Detail

      • EventType

        @Deprecated
public EventType()
        Deprecated.
        Do not use this constructor, as only one such EventType can exist
        Constructs a new EventType with the EventType.ROOT as its super type and the name set to null.

      • EventType

        public EventType​(String name)
        Constructs a new EventType with the specified name and the EventType.ROOT as its super type.
        Parameters:
        name - the name
        Throws:
        IllegalArgumentException - if an EventType with the same name and ROOT/Event.ANY as parent

      • EventType

        public EventType​(EventType<? super T> superType)
        Constructs a new EventType with the specified super type and the name set to null.
        Parameters:
        superType - the event super type
        Throws:
        IllegalArgumentException - if an EventType with "null" name and under this supertype exists

      • EventType

        public EventType​(EventType<? super T> superType,
                 String name)
        Constructs a new EventType with the specified super type and name.
        Parameters:
        superType - the event super type
        name - the name
        Throws:
        IllegalArgumentException - if an EventType with the same name and superType exists

    • Method Detail

      • getSuperType

        public final EventType<? super T> getSuperType()
        Gets the super type of this event type. The returned value is null only for the EventType.ROOT.
        Returns:
        the super type

      • getName

        public final String getName()
        Gets the name of this event type.
        Returns:
        the name

      • toString

        public String toString()
        Returns a string representation of this EventType object.
        Overrides:
        toString in class Object
        Returns:
        a string representation of this EventType object.