function init(self)
	msg.post(".", "acquire_input_focus")
end

function on_input(self, action_id, action)
	if action.pressed then
		if gui.pick_node(gui.get_node("add_10000"), action.x or 0, action.y or 0) then
			msg.post("example", "add", { amount = 10000 })
		elseif gui.pick_node(gui.get_node("add_1000"), action.x or 0, action.y or 0) then
			msg.post("example", "add", { amount = 1000 })
		elseif gui.pick_node(gui.get_node("add_100"), action.x or 0, action.y or 0) then
			msg.post("example", "add", { amount = 100 })
		elseif gui.pick_node(gui.get_node("remove_100"), action.x or 0, action.y or 0) then
			msg.post("example", "remove", { amount = 100 })
		end
	end
end