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NAME
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mousescrollsize – compute mouse scroll increment
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SYNOPSIS
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#include <draw.h>
int mousescrollsize(int maxlines)
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DESCRIPTION
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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 9term(1) and acme(1) to set their scrolling
behavior.
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SOURCE
SEE ALSO
BUGS
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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:
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Section "InputDevice"
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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"
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EndSection
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