Progressbar.y read/write property
Get or set the Progressbar vertical position. The vertical position start from 0 (top side of the parent widget) and increase to the bottom side of the parent widget.
Example
local ui = require "ui"
-- create a simple window
local win = ui.Window("Progressbar.y sample", 300, 600)
local pb = ui.Progressbar(win)
-- shows the window
win:show()
-- update user interface and increase Progressbar horizontal position
repeat
ui.update()
pb.y = pb.y + 1
until not win.visible or (pb.y > 600)