When changing the Picture.width property, the image expands/shrinks accordingly.
Picture.width read/write property
Get or set the Picture area width. The width starts from 0 (left side of the Picture) and increases to the right direction.
Example
local ui = require "ui"
-- create a simple Window
local win = ui.Window("Picture.width sample", 500, 230)
local picture = ui.Picture(win, "examples/LuaRT.png")
local inc_btn = ui.Button(win, "Increase Picture.width !", 110, picture.y+picture.height+30)
local dec_btn = ui.Button(win, "Decrease Picture.width", inc_btn.x+150, inc_btn.y)
local function onClick(self)
local delta
if self == inc_btn then
delta = 10
else
delta = -10
end
picture.width = picture.width + delta
end
inc_btn.onClick = onClick
dec_btn.onClick = onClick
-- shows the Window
win:show()
-- update user interface
repeat
ui.update()
until not win.visible