Button.height read/write property
Get or set the height of the Button area. The height starts from 0 (top side of the Button) and increase to the bottom direction.
Example
local ui = require "ui"
-- create a simple Window
local win = ui.Window("Button.width sample", 320, 200)
local button = ui.Button(win, "Growing !", 50)
-- shows the Window
win:show()
-- update user interface
repeat
ui.update()
button.height = button.height + 1
until not win.visible or button.height > 180