Scrolls a descendant of the viewport into view.
The viewport and the descendant must be visible and mapped for this function to work, otherwise no scrolling will be performed.
a descendant widget of the viewport
details of how to perform the scroll operation or NULL to scroll into view
Scrolls a descendant of the viewport into view.
The viewport and the descendant must be visible and mapped for this function to work, otherwise no scrolling will be performed.