example.lua

local app = sheets.Application()
local container = app.screen + sheets.Container( 0, 0, app.screen.width, app.screen.height )
local right = container + sheets.Button( "51 - self.width", 1, "#self.text + 4", 3, "Right" )
	  :set_ID "right"
local button1 = container + sheets.Button( 5, 0, "$$right.x - self.x", 5, "Hello world!" )
	  :set_ID "button1"
local centred = container + sheets.Button( "(parent.width - self.width) / 4 - 0.25", 12, 20, 5, "I am quarter x" )

local initial_anchor = container + sheets.Button( 20, 6, 20, 3, "!$.anchor == self & 'Initial anchor' | 'Non-anchor'" )
	:add_tag "anchor"
	:set_ID "initial_anchor"
local second_anchor = container + sheets.Button( 30, 10, 20, 3, "Second anchor" )
	:add_tag "anchor"
local anchor_display = container + sheets.Button( "($.anchor).x", 14, 20, 3, "Anchor display" )

function initial_anchor:on_click()
	if self:has_tag "anchor" then
		self:remove_tag "anchor"
	else
		self:add_tag "anchor"
	end
end

function button1:on_click()
	self:animate_x( 20, 0.4 )
	self.on_click = function()
		app:stop()
	end
end

function right:on_click()
	self:animate_width( 15, 0.4 )
	self.on_click = function()
		self:set_text "!$$initial_anchor.text" -- the wrap_text() won't be necessary in any release
	end
end

app:run()