LÖVE

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local InputField = require("InputField")
local field      = InputField("Initial text.")

local fieldX = 80
local fieldY = 50

love.keyboard.setKeyRepeat(true)

function love.keypressed(key, scancode, isRepeat)
	field:keypressed(key, isRepeat)
end
function love.textinput(text)
	field:textinput(text)
end

function love.mousepressed(mx, my, mbutton, pressCount)
	field:mousepressed(mx-fieldX, my-fieldY, mbutton, pressCount)
end
function love.mousemoved(mx, my)
	field:mousemoved(mx-fieldX, my-fieldY)
end
function love.mousereleased(mx, my, mbutton)
	field:mousereleased(mx-fieldX, my-fieldY, mbutton)
end
function love.wheelmoved(dx, dy)
	field:wheelmoved(dx, dy)
end

function love.draw()
	love.graphics.setColor(0, 0, 1)
	for _, x, y, w, h in field:eachSelection() do
		love.graphics.rectangle("fill", fieldX+x, fieldY+y, w, h)
	end

	love.graphics.setColor(1, 1, 1)
	for _, text, x, y in field:eachVisibleLine() do
		love.graphics.print(text, fieldX+x, fieldY+y)
	end

	local x, y, h = field:getCursorLayout()
	love.graphics.rectangle("fill", fieldX+x, fieldY+y, 1, h)
end

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local fieldHasFocus = false

function love.keypressed(key, scancode, isRepeat)
	-- First handle keys that override InputField's behavior.
	if key == "tab" then
		fieldHasFocus = not fieldHasFocus
		field:resetBlinking()

	-- Then handle InputField, if it has focus.
	elseif fieldHasFocus and field:keypressed(key, isRepeat) then
		-- Event was handled.

	-- Lastly handle keys for when InputField doesn't have focus or the key
	-- wasn't handled by the library.
	elseif key == "escape" then
		love.event.quit()
	end
end

function love.textinput(text)
	if fieldHasFocus then
		field:textinput(text)
	end
end

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function love.keypressed(key, scancode, isRepeat)
	-- ...
	elseif focusedField and focusedField:keypressed(key, isRepeat) then
	-- ...
end

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if someField == focusedField then
	-- someField has focus!
end