Shows the item. If the item is already showing in the receiver,
this method simply returns. Otherwise, the items are scrolled until
the item is visible.
@param item the item to be shown
@exception IllegalArgumentException <ul>
<li>ERROR_NULL_ARGUMENT - if the item is null</li>
<li>ERROR_INVALID_ARGUMENT - if the item has been disposed</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>
Shows the item. If the item is already showing in the receiver, this method simply returns. Otherwise, the items are scrolled until the item is visible.
@param item the item to be shown
@exception IllegalArgumentException <ul> <li>ERROR_NULL_ARGUMENT - if the item is null</li> <li>ERROR_INVALID_ARGUMENT - if the item has been disposed</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>
@see Table#showSelection()