Picture.tooltip read/write property
Get or set the tooltip text that appears when the user moves the mouse over the control, represented as a string value.
Set the property to an empty string to remove the tooltip message.
Example
local ui = require "ui"
-- create a simple window
local win = ui.Window("Picture.tooltip sample", 340, 180)
local picture = ui.Picture(win, "examples/LuaRT.png", -74)
-- set the Picture tooltip
picture.tooltip = "I'm a tooltip"
win:status("Hover the mouse on the Picture")
win:show()
-- update the user interface until the user closes the Window
repeat
ui.update()
until not win.visible