| Allegro CL version 10.0 Moderate update since the initial 10.0 release. 9.0 version | ||||||||||
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.
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This page was not revised from the 9.0 page.
Created 2015.5.21.
| Allegro CL version 10.0 Moderate update since the initial 10.0 release. 9.0 version | ||||||||||