gtk:tool-item-use-drag-window (item)

item -- a gtk:tool-item widget
setting -- a boolean whether item has a drag window

Accessor of the use drag window property of the tool item. The gtk:tool-item-use-drag-window function returns whether item has a drag window. The (setf gtk:tool-item-use-drag-window) function sets whether item has a drag window.

When true the tool item can be used as a drag source through the gtk:drag-source-set function. When item has a drag window it will intercept all events, even those that would otherwise be sent to a child of item.