Returns the item at the given point in the receiver
or null if no such item exists. The point is in the
coordinate system of the receiver.
@param point the point used to locate the item
@return the item at the given point
@exception IllegalArgumentException <ul>
<li>ERROR_NULL_ARGUMENT - if the point is null</li>
</ul>
@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 the item at the given point in the receiver or null if no such item exists. The point is in the coordinate system of the receiver.
@param point the point used to locate the item @return the item at the given point
@exception IllegalArgumentException <ul> <li>ERROR_NULL_ARGUMENT - if the point is null</li> </ul> @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>