Returns an array of listeners who will be notified when a drag and drop
operation is in progress, by sending it one of the messages defined in
the <code>DragSourceListener</code> interface.
@return the listeners who will be notified when a drag and drop
operation is in progress
@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 an array of listeners who will be notified when a drag and drop operation is in progress, by sending it one of the messages defined in the <code>DragSourceListener</code> interface.
@return the listeners who will be notified when a drag and drop operation is in progress
@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 DragSourceListener @see #addDragListener @see #removeDragListener @see DragSourceEvent
@since 3.4