list-widget-get-index

Arguments: list-widget

Returns the index of the selected item in list-widget. Zero indicates the top item in the list. If no item is selected, nil is returned. If the widget is a multi-item-list, then a list of the selected values is returned, or nil if no items are selected.

list-widget can be a single-item-list, a multi-item-list, or a combo-box.

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Created 2012.5.30.