Image.height | LuaRT free and open source Windows programming framework for Lua

Image.height readonly property

Get the height of the Image. The height starts from 0 (top side of the Image) and increase to the bottom direction.

Example


local ui = require "ui"
require "canvas"

-- create a simple Window
local win = ui.Window("Canvas.height sample", "fixed", 320, 200)

-- create a Canvas
local canvas = ui.Canvas(win)
canvas.align = "all"
local img = canvas:Image("LuaRT.png")
local ypos = -img.height

function canvas:onPaint()
  self:clear()
  img:draw(-60, ypos, 0.9)
  ypos = ypos > canvas.height and -img.height or ypos+3
end

win:show()

-- update user interface
repeat
  ui.update()
until not win.visible