NAME

mousescrollsize - compute mouse scroll increment

SYNOPSIS

#include <draw.h>

int mousescrollsize(int maxlines)

DESCRIPTION

Mousescrollsize computes the number of lines of text that should be scrolled in response to a mouse scroll wheel click. Maxlines is the number of lines visible in the text window.

The default scroll increment is one line. This default can be overridden by setting the $mousescrollsize environment variable to an integer, which specifies a constant number of lines, or to a real number followed by a percent character, indicating that the scroll increment should be a percentage of the total number of lines in the window. For example, setting $mousescrollsize to 50% causes a half-window scroll increment.

Mousescrollsize is used by and to set their scrolling behavior.

SOURCE

/src/libdraw/scroll.c

SEE ALSO

BUGS

Libdraw expects up and down scroll wheel events to be expressed as clicks of mouse buttons 4 and 5, but the XFree86 default is to ignore the scroll wheel. To enable the scroll wheel, change your InputDevice section of XF86Config-4 to look like:

Section "InputDevice"
	Identifier	"Mouse0"
	Driver	"mouse"
	Option	"Device" "/dev/psaux"
	# next four lines enable scroll wheel as buttons 4 and 5
	Option	"Buttons" "5"
	Option	"Emulate3Buttons" "off"
	Option	"Protocol" "ImPS/2"
	Option	"ZAxisMapping" "4 5"
EndSection