From 82ba818ff456bcd6d56a06226e3f27e98fbb55c3 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Thu, 14 Aug 2025 22:58:58 -0500 Subject: removing all downloaded devdocs files --- devdocs/elisp/accessing-scroll.html | 17 ----------------- 1 file changed, 17 deletions(-) delete mode 100644 devdocs/elisp/accessing-scroll.html (limited to 'devdocs/elisp/accessing-scroll.html') diff --git a/devdocs/elisp/accessing-scroll.html b/devdocs/elisp/accessing-scroll.html deleted file mode 100644 index 03550d55..00000000 --- a/devdocs/elisp/accessing-scroll.html +++ /dev/null @@ -1,17 +0,0 @@ -

Accessing Scroll Bar Events

These functions are useful for decoding scroll bar events.

Function: scroll-bar-event-ratio event -

This function returns the fractional vertical position of a scroll bar event within the scroll bar. The value is a cons cell (portion . whole) containing two integers whose ratio is the fractional position.

-
Function: scroll-bar-scale ratio total -
-

This function multiplies (in effect) ratio by total, rounding the result to an integer. The argument ratio is not a number, but rather a pair (num . denom)—typically a value returned by scroll-bar-event-ratio.

This function is handy for scaling a position on a scroll bar into a buffer position. Here’s how to do that: 

(+ (point-min)
-   (scroll-bar-scale
-      (posn-x-y (event-start event))
-      (- (point-max) (point-min))))
-
-

Recall that scroll bar events have two integers forming a ratio, in place of a pair of x and y coordinates.

-
-
-

- Copyright © 1990-1996, 1998-2022 Free Software Foundation, Inc.
Licensed under the GNU GPL license.
- https://www.gnu.org/software/emacs/manual/html_node/elisp/Accessing-Scroll.html -

-
-- cgit v1.2.3