Input Display

See exactly what Rebind sees: keys, mouse buttons, and controller buttons.

Input Display is a clean, click-through input HUD for recording, teaching, streaming, testing shortcuts, or debugging a controller setup.

What it does

Shows currently held keyboard keys.
Shows mouse buttons as LMB, RMB, MMB, M4, and M5.
Shows controller buttons when Rebind receives them.
Draws each input as a compact keycap.
Updates live, with no input blocking.
Can be shown or hidden with one hotkey.
Stores no history and sends no data.

Quick start

Install and start Input Display.
Press Ctrl+Alt+I to show the HUD.
Press keys or mouse buttons to see them appear.
Press Ctrl+Alt+I again to hide it.

Controls

Key	Action
Ctrl+Alt+I	Show or hide the input display.

The hotkey is configurable.

Settings

Show on start
Show mouse buttons
Show controller buttons
Maximum keys shown — 4 to 16.
Position — top-left, top-right, bottom-left, or bottom-right.

What it displays

Letter and number keys use their normal names.
Modifiers appear as LSHIFT, RSHIFT, LCTRL, RCTRL, LALT, and RALT.
Mouse buttons are shortened to LMB / RMB / MMB / M4 / M5.
Controller buttons use their Rebind names, such as PadA, PadLB, and PadUp, shortened for the keycaps.

Limits

It shows what is held now, not a history or an input log.
Controller buttons require hardware mode and a Rebind Link with a joypad.
In software mode, controller input is not available.
The overlay is click-through and keyboard-only; it cannot be clicked.
Rebind overlays do not appear over exclusive-fullscreen games.
It does not record or replay input.

Privacy

Input Display only reads the live input state that Rebind already exposes. It does not capture the screen, read the clipboard, use the network, or write input logs.

Requirements

Rebind 3.11.0 or newer
A desktop where Rebind overlays are supported
Rebind Link with a joypad for controller buttons

Input Display v1.0.0 — an honest little input mirror.

Version 1.0.0 (current)

main.luau

--[[
  rebind: min_sdk=3.11.0
  rebind: permissions=none
  rebind: tick_rate=30
  rebind: memory_limit_mb=16
]]

local COLORS = {
  panel = "#0E110FF5",
  key = "#181D18",
  key_active = "#C7F36B18",
  border = "#2A332A",
  border_active = "#C7F36B70",
  text = "#F4F1E8",
  soft = "#D8DDD3",
  muted = "#98A398",
  accent = "#C7F36B",
}

local LABELS = {
  Mouse1 = "LMB",
  Mouse2 = "RMB",
  Mouse3 = "MMB",
  Mouse4 = "M4",
  Mouse5 = "M5",
  Space = "SPACE",
  Enter = "ENTER",
  Escape = "ESC",
  Backspace = "BACK",
  Tab = "TAB",
  LShift = "LSHIFT",
  RShift = "RSHIFT",
  LCtrl = "LCTRL",
  RCtrl = "RCTRL",
  LAlt = "LALT",
  RAlt = "RALT",
  LWin = "LWIN",
  RWin = "RWIN",
  PadA = "A",
  PadB = "B",
  PadX = "X",
  PadY = "Y",
  PadLB = "LB",
  PadRB = "RB",
  PadLT = "LT",
  PadRT = "RT",
  PadView = "VIEW",
  PadMenu = "MENU",
  PadLS = "LS",
  PadRS = "RS",
  PadUp = "UP",
  PadDown = "DOWN",
  PadLeft = "LEFT",
  PadRight = "RIGHT",
}

local PRIORITY = {
  Mouse1 = 1,
  Mouse2 = 2,
  Mouse3 = 3,
  Mouse4 = 4,
  Mouse5 = 5,
  W = 10,
  A = 11,
  S = 12,
  D = 13,
  Space = 14,
  LShift = 15,
  RShift = 16,
  LCtrl = 17,
  RCtrl = 18,
  LAlt = 19,
  RAlt = 20,
  Tab = 21,
  Enter = 22,
  Escape = 23,
}

local cfg = rb.ui.schema({
  toggle_key = rb.ui.keybind("Ctrl+Alt+I", {
    label = "Show / hide display",
    group = "Hotkeys",
  }),
  show_on_start = rb.ui.toggle(false, {
    label = "Show on start",
    group = "Behavior",
  }),
  show_mouse = rb.ui.toggle(true, {
    label = "Show mouse buttons",
    group = "Behavior",
  }),
  show_controller = rb.ui.toggle(true, {
    label = "Show controller buttons",
    group = "Behavior",
  }),
  max_keys = rb.ui.slider(8, {
    min = 4,
    max = 16,
    step = 1,
    label = "Maximum keys shown",
    group = "Display",
  }),
  anchor = rb.ui.select("bottom-left", {
    "top-left",
    "top-right",
    "bottom-left",
    "bottom-right",
  }, {
    label = "Position",
    group = "Display",
  }),
})

local state = {
  visible = cfg.show_on_start ~= false,
  surface = nil,
  signature = nil,
}

local function add_rect(ops, x, y, width, height, fill, radius, border, border_width)
  local op = {
    kind = "rect",
    x = x,
    y = y,
    w = width,
    h = height,
    fill = fill,
    radius = radius or 0,
  }
  if border then
    op.border = border
    op.border_width = border_width or 1
  end
  ops[#ops + 1] = op
end

local function add_text(ops, x, y, size, value, color, bold)
  ops[#ops + 1] = {
    kind = "text",
    x = x,
    y = y,
    size = size,
    text = value,
    color = color,
    bold = bold == true,
  }
end

local function text_width(value, size, bold)
  local ok, width = pcall(rb.overlay.measure, value, size, bold)
  if ok and width then
    return width
  end
  return #value * size * 0.62
end

local function key_label(key)
  local label = LABELS[key]
  if label then
    return label
  end
  if #key > 8 then
    return key:sub(1, 8)
  end
  return key
end

local function is_controller_key(key)
  return key:sub(1, 3) == "Pad" or key:sub(1, 3) == "Joy"
end

local function visible_keys()
  local keys = {}
  local held = rb.input.keys() or {}
  for _, key in ipairs(held) do
    local show = true
    if not cfg.show_mouse and key:sub(1, 5) == "Mouse" then
      show = false
    end
    if not cfg.show_controller and is_controller_key(key) then
      show = false
    end
    if show then
      keys[#keys + 1] = key
    end
  end

  table.sort(keys, function(a, b)
    local pa = PRIORITY[a] or 50
    local pb = PRIORITY[b] or 50
    if pa == pb then
      return a < b
    end
    return pa < pb
  end)
  return keys
end

local function remove_surface()
  if state.surface then
    pcall(function()
      state.surface:remove()
    end)
    state.surface = nil
  end
end

local function draw(keys)
  if not state.visible then
    remove_surface()
    return
  end

  local limit = math.max(4, math.min(16, math.floor(tonumber(cfg.max_keys) or 8)))
  local shown = {}
  for index = 1, math.min(#keys, limit) do
    shown[#shown + 1] = keys[index]
  end
  local extra = math.max(0, #keys - limit)
  local rows = math.max(1, math.ceil(#shown / 4))
  local height = 62 + rows * 38 + (extra > 0 and 16 or 0)
  local signature = table.concat(shown, ",")
    .. "|" .. tostring(extra)
    .. "|" .. tostring(cfg.anchor)
    .. "|" .. tostring(limit)
  if signature == state.signature then
    return
  end
  state.signature = signature

  local ops = {}
  add_rect(ops, 0, 0, 360, height, COLORS.panel, 14, COLORS.border, 1)
  add_rect(ops, 16, 16, 3, 24, COLORS.accent, 1)
  add_text(ops, 28, 12, 11, "INPUT", COLORS.text, true)
  add_text(ops, 28, 30, 9, "LIVE", COLORS.muted)
  add_text(ops, 300, 12, 9, "Ctrl+Alt+I", COLORS.muted)

  if #shown == 0 then
    add_rect(ops, 16, 48, 328, 30, COLORS.key, 8, COLORS.border, 1)
    add_text(ops, 24, 56, 10, "Press any key", COLORS.muted)
  else
    for index, key in ipairs(shown) do
      local column = (index - 1) % 4
      local row = (index - 1) // 4
      local x = 16 + column * 84
      local y = 48 + row * 38
      local label = key_label(key)
      local label_width = text_width(label, 10, true)
      add_rect(ops, x, y, 76, 30, COLORS.key_active, 7, COLORS.border_active, 1)
      add_text(
        ops,
        x + (76 - label_width) / 2,
        y + 9,
        10,
        label,
        COLORS.text,
        true
      )
    end
    if extra > 0 then
      add_text(ops, 16, 54 + rows * 38, 9, "+" .. tostring(extra) .. " more", COLORS.muted)
    end
  end

  if state.surface then
    local ok = pcall(function()
      state.surface:set({
        width = 360,
        height = height,
        ops = ops,
      })
    end)
    if not ok then
      remove_surface()
    end
  end

  if not state.surface then
    local ok, surface = pcall(rb.overlay.surface, {
      anchor = cfg.anchor,
      width = 360,
      height = height,
      ops = ops,
    })
    if ok then
      state.surface = surface
    else
      rb.log.warn("Input Display: could not create surface: " .. tostring(surface))
    end
  end
end

local function toggle()
  state.visible = not state.visible
  state.signature = nil
  if state.visible then
    draw(visible_keys())
  else
    remove_surface()
  end
end

local function tick()
  if not state.visible then
    return
  end
  draw(visible_keys())
end

rb.bind(cfg.toggle_key, toggle)

function OnStart()
  state.visible = cfg.show_on_start ~= false
  state.signature = nil
  draw(visible_keys())
end

function OnTick()
  tick()
end

function OnStop()
  remove_surface()
end

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input-display

Input Display

What it does

Quick start

Controls

Settings

What it displays

Limits

Privacy

Requirements

input-display

Readme

Input Display

What it does

Quick start

Controls

Settings

What it displays

Limits

Privacy

Requirements

Files

Reviews