Returns <code>true</code> if the receiver is enabled and all
of the receiver's ancestors are enabled, and <code>false</code>
otherwise. A disabled menu item is typically not selectable from the
user interface and draws with an inactive or "grayed" look.
@return the receiver's enabled state
@exception SWTException <ul>
<li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
<li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
</ul>
Returns <code>true</code> if the receiver is enabled and all of the receiver's ancestors are enabled, and <code>false</code> otherwise. A disabled menu item is typically not selectable from the user interface and draws with an inactive or "grayed" look.
@return the receiver's enabled state
@exception SWTException <ul> <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> </ul>
@see #getEnabled