mouse-wheel-scroll-lines

Arguments:

This function returns the number of lines that a mouse wheel should scroll for each notch that it is rotated, or t if a wheel "roll" of any number of notches should do a page scroll. This is a Windows Control Panel setting that defaults to 3. A custom mouse-wheel method that does scrolling could call this function to help decide how far to scroll.

See also mouse-wheel-present.

Copyright (c) 1998-2009, Franz Inc. Oakland, CA., USA. All rights reserved.
Documentation for Allegro CL version 8.1. This page was not revised from the 8.0 page.
Created 2009.7.29.