Occurs when navigation button is clicked, but before slide is changed.
|e||Object||An event object which contains the button index|
This event can be handled by creating a function in your application controller $scope and applying this function as value to an attribute in SlideBar directive:
The events attribute has a higher priority than the button-clicking attribute. If both attributes are set, the value from events attribute is used.
Supported in: v1.0.