nixpkgs/modules/services/x11/hardware/multitouch.nix

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{ config, pkgs, ... }:
with pkgs.lib;
let cfg = config.services.xserver.multitouch; in
{
options = {
services.xserver.multitouch = {
enable = mkOption {
default = false;
example = true;
description = "Whether to enable multitouch touchpad support.";
};
invertScroll = mkOption {
default = false;
example = true;
type = types.bool;
description = "Whether to invert scrolling direction à la OSX Lion";
};
ignorePalm = mkOption {
default = false;
example = true;
type = types.bool;
description = "Whether to ignore touches detected as being the palm (i.e when typing)";
};
};
};
config = mkIf cfg.enable {
services.xserver.modules = [ pkgs.xf86_input_mtrack ];
services.xserver.config =
''
# Automatically enable the multitouch driver
Section "InputClass"
MatchIsTouchpad "on"
Identifier "Touchpads"
Driver "mtrack"
Option "IgnorePalm" "${if cfg.ignorePalm then "true" else "false"}"
${optionalString cfg.invertScroll ''
Option "ScrollUpButton" "5"
Option "ScrollDownButton" "4"
Option "ScrollLeftButton" "7"
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Option "ScrollRightButton" "6"
''}
EndSection
'';
};
}