plugins: update plugins for the current API

A few changes to the Lua API didn't get reflected in the example
plugins, let's update them.

Also included here is naming of all arguments, instead of _ use the
argument name even where unused. These are examples so being expressive
is more important than making any lua static checkers happy.

Part-of: <https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/1339>

plugins/10-dwt.lua

@@ -13,15 +13,15 @@
 
 tp_enabled = true
 
-libinput:connect("timer-expired", function(_, now)
+libinput:connect("timer-expired", function(now)
     log.debug("touchpad enabled")
     tp_enabled = true
 end)
 
-libinput:connect("new-evdev-device", function (_, device)
+libinput:connect("new-evdev-device", function (device)
     local props = device:udev_properties()
     if props.ID_INPUT_KEYBOARD then
-        device:connect("evdev-frame", function (_, _, _)
+        device:connect("evdev-frame", function (device, frame, timestamp)
             libinput:timer_set_relative(2000000)
             if tp_enabled then
                 log.debug("touchpad disabled")
@@ -30,7 +30,7 @@ libinput:connect("new-evdev-device", function (_, device)
         end)
     elseif props.ID_INPUT_TOUCHPAD then
         log.debug("Touchpad detected: " .. device:name())
-        device:connect("evdev-frame", function (_, frame, _)
+        device:connect("evdev-frame", function (device, frame, timestamp)
             if not tp_enabled then
                 -- Returning an empty table discards the event.
                 return {}

plugins/10-logitech-mx-master-horiz-scroll.lua

@@ -17,10 +17,10 @@
 --
 -- UNCOMMENT THIS LINE TO ACTIVATE THE PLUGIN
 -- libinput:register({1})
-libinput:connect("new-evdev-device", function (_, device)
+libinput:connect("new-evdev-device", function (device)
     local info = device:info()
     if info.vid == 0x046D and info.pid == 0xC548 then
-        device:connect("evdev-frame", function (_, frame, timestamp)
+        device:connect("evdev-frame", function (device, frame, timestamp)
             for _, event in ipairs(frame) do
                 if event.usage == evdev.REL_HWHEEL or event.usage == evdev.REL_HWHEEL_HI_RES then
                     event.value = -event.value

plugins/10-pointer-go-faster.lua

@@ -6,10 +6,10 @@
 --
 -- UNCOMMENT THIS LINE TO ACTIVATE THE PLUGIN
 -- libinput:register({1})
-libinput:connect("new-evdev-device", function(_, device)
+libinput:connect("new-evdev-device", function(device)
     local usages = device:usages()
     if usages[evdev.REL_X] then
-        device:connect("evdev-frame", function(_, frame, timestamp)
+        device:connect("evdev-frame", function(device, frame, timestamp)
             for _, v in ipairs(frame) do
                 if v.usage == evdev.REL_X or v.usage == evdev.REL_Y then
                     -- Multiply the relative motion by 3

plugins/10-pointer-go-slower.lua

@@ -39,7 +39,7 @@ libinput:connect("new-evdev-device", function(device)
     local usages = device:usages()
     if usages[evdev.REL_X] then
         remainders[device] = { x = 0.0, y = 0.0 }
-        device:connect("evdev-frame", function(_, frame, timestamp)
+        device:connect("evdev-frame", function(device, frame, timestamp)
             for _, v in ipairs(frame) do
                 if v.usage == evdev.REL_X then
                     v.value, _ = decelerate(device, v.value, 0.0)