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| Allegro CL version 10.1 Unrevised from 10.0 to 10.1. 10.0 version

## 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. On Windows, this is a global Control Panel setting that defaults to 3. On GTK, Common Graphics arbitrarily always returns 3 because GTK does not appear to have an option for this. 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) 1998-2022, Franz Inc. Lafayette, CA., USA. All rights reserved.
This page was not revised from the 10.0 page.
Created 2019.8.20.

|  | ToC | DocOverview | CGDoc | RelNotes | FAQ | Index | PermutedIndex
| Allegro CL version 10.1 Unrevised from 10.0 to 10.1. 10.0 version