Created
July 23, 2021 04:48
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Hammerspoon script for handling middle mouse scroll with MX Ergo
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-- HANDLE SCROLLING WITH MIDDLE MOUSE BUTTON PRESSED | |
local deferred = false | |
overrideOtherMouseDown = | |
hs.eventtap.new( | |
{hs.eventtap.event.types.otherMouseDown}, | |
function(e) | |
deferred = true | |
return true | |
end | |
) | |
overrideOtherMouseUp = | |
hs.eventtap.new( | |
{hs.eventtap.event.types.otherMouseUp}, | |
function(e) | |
if (deferred) then | |
overrideOtherMouseDown:stop() | |
overrideOtherMouseUp:stop() | |
hs.eventtap.middleClick(e:location(), pressedMouseButton) | |
overrideOtherMouseDown:start() | |
overrideOtherMouseUp:start() | |
return true | |
end | |
return false | |
end | |
) | |
local oldmousepos = {} | |
local scrollmult = 2 -- negative multiplier makes mouse work like traditional scrollwheel, for macOS, use positive number. | |
dragOtherToScroll = | |
hs.eventtap.new( | |
{hs.eventtap.event.types.otherMouseDragged}, | |
function(e) | |
deferred = false | |
oldmousepos = hs.mouse.getAbsolutePosition() | |
local dx = e:getProperty(hs.eventtap.event.properties["mouseEventDeltaX"]) | |
local dy = e:getProperty(hs.eventtap.event.properties["mouseEventDeltaY"]) | |
local scroll = hs.eventtap.event.newScrollEvent({dx * scrollmult, dy * scrollmult}, {}, "pixel") | |
-- put the mouse back | |
hs.mouse.setAbsolutePosition(oldmousepos) | |
return true, {scroll} | |
end | |
) | |
overrideOtherMouseDown:start() | |
overrideOtherMouseUp:start() | |
dragOtherToScroll:start() |
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Next up, map Forward mouse as Middle button.