Specifies the scrolling speed when mouse wheel is used.
Property Value
A String value. The default is 'normal', stating that current view of the TreeView is scrolled by few items.
Remarks
The following values are acceptable:
- veryslow - the current view is scrolled item by item
- slow - the current view is scrolled by two items
- normal - the current view is scrolled by quarter of tree height
- fast - the current view is scrolled by half of tree height
- veryfast - the current view is scrolled by whole tree height