<p>The widget is searched starting at 0 until an
item is found that is equal to the search item.
If no item is found, -1 is returned. Indexing
is zero based. This index is relative to the parent only.
@param item the search item
@return the index of the item or -1
Gets the index of an item.
<p>The widget is searched starting at 0 until an item is found that is equal to the search item. If no item is found, -1 is returned. Indexing is zero based. This index is relative to the parent only.
@param item the search item @return the index of the item or -1