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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » java.awt 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.awt.AWTEvent
   java.awt.SequencedEvent

SequencedEvent
class SequencedEvent extends AWTEvent implements ActiveEvent(Code)
A mechanism for ensuring that a series of AWTEvents are executed in a precise order, even across multiple AppContexts. The nested events will be dispatched in the order in which their wrapping SequencedEvents were constructed. The only exception to this rule is if the peer of the target of the nested event was destroyed (with a call to Component.removeNotify) before the wrapping SequencedEvent was able to be dispatched. In this case, the nested event is never dispatched.
version:
   1.7, 01/23/03
author:
   David Mendenhall



Constructor Summary
 SequencedEvent(AWTEvent nested)
     Constructs a new SequencedEvent which will dispatch the specified nested event.

Method Summary
final public  voiddispatch()
     Dispatches the nested event after all previous nested events have been dispatched or disposed.
final  voiddispose()
     Disposes of this instance.
final public  booleanisFirstOrDisposed()
     Sequenced events are dispatched in order, so we cannot dispatch until we are the first sequenced event in the queue (i.e.


Constructor Detail
SequencedEvent
SequencedEvent(AWTEvent nested)(Code)
Constructs a new SequencedEvent which will dispatch the specified nested event.
Parameters:
  nested - the AWTEvent which this SequencedEvent's dispatch()method will dispatch




Method Detail
dispatch
final public void dispatch()(Code)
Dispatches the nested event after all previous nested events have been dispatched or disposed. If this method is invoked before all previous nested events have been dispatched, then this method blocks until such a point is reached. While waiting disposes nested events to disposed AppContext NOTE: Locking protocol. Since dispose() can get EventQueue lock, dispatch() shall never call dispose() while holding the lock on the list, as EventQueue lock is held during dispatching. The locks should be acquired in the same order.



dispose
final void dispose()(Code)
Disposes of this instance. This method is invoked once the nested event has been dispatched and handled, or when the peer of the target of the nested event has been disposed with a call to Component.removeNotify. NOTE: Locking protocol. Since SunToolkit.postEvent can get EventQueue lock, it shall never be called while holding the lock on the list, as EventQueue lock is held during dispatching and dispatch() will get lock on the list. The locks should be acquired in the same order.



isFirstOrDisposed
final public boolean isFirstOrDisposed()(Code)
Sequenced events are dispatched in order, so we cannot dispatch until we are the first sequenced event in the queue (i.e. it's our turn). But while we wait for our turn to dispatch, the event could have been disposed for a number of reasons.



Fields inherited from java.awt.AWTEvent
final public static long ACTION_EVENT_MASK(Code)(Java Doc)
final public static long ADJUSTMENT_EVENT_MASK(Code)(Java Doc)
final public static long COMPONENT_EVENT_MASK(Code)(Java Doc)
final public static long CONTAINER_EVENT_MASK(Code)(Java Doc)
final public static long FOCUS_EVENT_MASK(Code)(Java Doc)
final static long INPUT_METHODS_ENABLED_MASK(Code)(Java Doc)
final public static long INPUT_METHOD_EVENT_MASK(Code)(Java Doc)
final public static long INVOCATION_EVENT_MASK(Code)(Java Doc)
final public static long ITEM_EVENT_MASK(Code)(Java Doc)
final public static long KEY_EVENT_MASK(Code)(Java Doc)
final public static long MOUSE_EVENT_MASK(Code)(Java Doc)
final public static long MOUSE_MOTION_EVENT_MASK(Code)(Java Doc)
final public static long MOUSE_WHEEL_EVENT_MASK(Code)(Java Doc)
final public static long PAINT_EVENT_MASK(Code)(Java Doc)
final public static int RESERVED_ID_MAX(Code)(Java Doc)
final public static long TEXT_EVENT_MASK(Code)(Java Doc)
final public static long WINDOW_EVENT_MASK(Code)(Java Doc)
final public static long WINDOW_FOCUS_EVENT_MASK(Code)(Java Doc)
protected boolean consumed(Code)(Java Doc)
transient boolean focusManagerIsDispatching(Code)(Java Doc)
protected int id(Code)(Java Doc)

Methods inherited from java.awt.AWTEvent
protected void consume()(Code)(Java Doc)
Event convertToOld()(Code)(Java Doc)
public int getID()(Code)(Java Doc)
protected boolean isConsumed()(Code)(Java Doc)
public String paramString()(Code)(Java Doc)
void setSource(Object newSource)(Code)(Java Doc)
public String toString()(Code)(Java Doc)

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