scroll

Arguments: window offset &key delay-redraw

Scrolls window by offset which must be a position object (see make-position) indicating the amount to scroll by in the x and y directions. Redrawing is delayed if the delay-redraw keyword argument is true. Returns the actual amount of scrolling achieved as a position, or nil if no scrolling was done. See also scroll-to.

This function is called automatically by user-scroll when the user clicks on the scrollbar of a regular window or a lisp-widget-window (but not for an os-widget-window, which handles its scrolling internally).

Keystrokes do not automatically scroll windows by default. Keyboard scrolling can be set up by writing a virtual-key-down method that calls this function, or more simply by using the handle-scrolling-keys property.

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This page was not revised from the 9.0 page.
Created 2015.5.21.