Causes the user-interface thread to <em>sleep</em> (that is,
to be put in a state where it does not consume CPU cycles)
until an event is received or it is otherwise awakened.
@return <code>true</code> if an event requiring dispatching was placed on the queue.
@exception SWTException <ul>
<li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
<li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
</ul>
Causes the user-interface thread to <em>sleep</em> (that is, to be put in a state where it does not consume CPU cycles) until an event is received or it is otherwise awakened.
@return <code>true</code> if an event requiring dispatching was placed on the queue.
@exception SWTException <ul> <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> </ul>
@see #wake