A question about NSTableView

There is a check box titled "Continuous" under the "Con开发者_StackOverflow中文版trol State" section in the TableView attributes dialogue box. I don't seem to be able to find any description about it. The only thing I know about it, is it is unchecked by default and my sample tableView object doesn't display anything unless it is checked. Can anybody more knowledgable tell me what does "Continuous" state mean here ?

isContinuous and setContinuous: are methods of NSControl, which is a superclass of NSTableView. In the context of NSTableView, this property has no effect, it is just an unused aspect of the superclass. Other NSControl subclasses, such as NSSlider use it to signify that their value should be updated continuously during mouse tracking.