Class AWTEvent

java.lang.Object
java.util.EventObject
java.awt.AWTEvent
All Implemented Interfaces:
Serializable
Direct Known Subclasses:
ActionEvent, AdjustmentEvent, AncestorEvent, ComponentEvent, HierarchyEvent, InputMethodEvent, InternalFrameEvent, InvocationEvent, ItemEvent, TextEvent
public abstract class AWTEvent extends EventObject
The root event class for all AWT events. This class and its subclasses supersede the original java.awt.Event class. Subclasses of this root AWTEvent class defined outside of the java.awt.event package should define event ID values greater than the value defined by RESERVED_ID_MAX.

The event masks defined in this class are needed by Component subclasses which are using Component.enableEvents() to select for event types not selected by registered listeners. If a listener is registered on a component, the appropriate event mask is already set internally by the component.

The masks are also used to specify to which types of events an AWTEventListener should listen. The masks are bitwise-ORed together and passed to Toolkit.addAWTEventListener.

Since:
1.1
See Also:

  • Field Details

    • id

      protected int id
      The event's id.
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    • consumed

      protected boolean consumed
      Controls whether or not the event is sent back down to the peer once the source has processed it - false means it's sent to the peer; true means it's not. Semantic events always have a 'true' value since they were generated by the peer in response to a low-level event.
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    • COMPONENT_EVENT_MASK

      public static final long COMPONENT_EVENT_MASK
      The event mask for selecting component events.
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    • CONTAINER_EVENT_MASK

      public static final long CONTAINER_EVENT_MASK
      The event mask for selecting container events.
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    • FOCUS_EVENT_MASK

      public static final long FOCUS_EVENT_MASK
      The event mask for selecting focus events.
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    • KEY_EVENT_MASK

      public static final long KEY_EVENT_MASK
      The event mask for selecting key events.
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    • MOUSE_EVENT_MASK

      public static final long MOUSE_EVENT_MASK
      The event mask for selecting mouse events.
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    • MOUSE_MOTION_EVENT_MASK

      public static final long MOUSE_MOTION_EVENT_MASK
      The event mask for selecting mouse motion events.
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    • WINDOW_EVENT_MASK

      public static final long WINDOW_EVENT_MASK
      The event mask for selecting window events.
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    • ACTION_EVENT_MASK

      public static final long ACTION_EVENT_MASK
      The event mask for selecting action events.
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    • ADJUSTMENT_EVENT_MASK

      public static final long ADJUSTMENT_EVENT_MASK
      The event mask for selecting adjustment events.
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    • ITEM_EVENT_MASK

      public static final long ITEM_EVENT_MASK
      The event mask for selecting item events.
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    • TEXT_EVENT_MASK

      public static final long TEXT_EVENT_MASK
      The event mask for selecting text events.
      See Also:

    • INPUT_METHOD_EVENT_MASK

      public static final long INPUT_METHOD_EVENT_MASK
      The event mask for selecting input method events.
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    • PAINT_EVENT_MASK

      public static final long PAINT_EVENT_MASK
      The event mask for selecting paint events.
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    • INVOCATION_EVENT_MASK

      public static final long INVOCATION_EVENT_MASK
      The event mask for selecting invocation events.
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    • HIERARCHY_EVENT_MASK

      public static final long HIERARCHY_EVENT_MASK
      The event mask for selecting hierarchy events.
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    • HIERARCHY_BOUNDS_EVENT_MASK

      public static final long HIERARCHY_BOUNDS_EVENT_MASK
      The event mask for selecting hierarchy bounds events.
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    • MOUSE_WHEEL_EVENT_MASK

      public static final long MOUSE_WHEEL_EVENT_MASK
      The event mask for selecting mouse wheel events.
      Since:
      1.4
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    • WINDOW_STATE_EVENT_MASK

      public static final long WINDOW_STATE_EVENT_MASK
      The event mask for selecting window state events.
      Since:
      1.4
      See Also:

    • WINDOW_FOCUS_EVENT_MASK

      public static final long WINDOW_FOCUS_EVENT_MASK
      The event mask for selecting window focus events.
      Since:
      1.4
      See Also:

    • RESERVED_ID_MAX

      public static final int RESERVED_ID_MAX
      The maximum value for reserved AWT event IDs. Programs defining their own event IDs should use IDs greater than this value.
      See Also:

  • Constructor Details

    • AWTEvent

      @Deprecated(since="9") public AWTEvent(Event event)
      Deprecated.
      It is recommended that AWTEvent(Object, int) be used instead
      Constructs an AWTEvent object from the parameters of a 1.0-style event.
      Parameters:
      event - the old-style event

    • AWTEvent

      public AWTEvent(Object source, int id)
      Constructs an AWTEvent object with the specified source object and type.
      Parameters:
      source - the object where the event originated
      id - the event type

  • Method Details

    • setSource

      public void setSource(Object newSource)
      Retargets an event to a new source. This method is typically used to retarget an event to a lightweight child Component of the original heavyweight source.

      This method is intended to be used only by event targeting subsystems, such as client-defined KeyboardFocusManagers. It is not for general client use.

      Parameters:
      newSource - the new Object to which the event should be dispatched
      Since:
      1.4

    • getID

      public int getID()
      Returns the event type.
      Returns:
      the event's type id

    • toString

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

    • paramString

      public String paramString()
      Returns a string representing the state of this Event. This method is intended to be used only for debugging purposes, and the content and format of the returned string may vary between implementations. The returned string may be empty but may not be null.
      Returns:
      a string representation of this event

    • consume

      protected void consume()
      Consumes this event, if this event can be consumed. Only low-level, system events can be consumed

    • isConsumed

      protected boolean isConsumed()
      Returns whether this event has been consumed.
      Returns:
      true if this event has been consumed; otherwise false