Canvas.color | LuaRT free and open source Windows programming framework for Lua

Canvas.color read/write property

Get or set the Canvas drawing color.

The color is represented by a number, an RGBA value (one byte per primary color and one byte for alpha channel).
A RGBA color can be represented as an hexadecimal number : 0xRRGGBBAA , RR meaning a 8bit hexadecimal red value, and so on.

Example


require "canvas"

-- create a simple window
local win = ui.Window("canvas.color sample", "fixed", 500, 400)
local canvas = ui.Canvas(win)
canvas.align = "all"
canvas:clear(0x000000FF)

win:show()

-- update user interface
repeat
  canvas:begin()
  canvas.color = math.random(0xFFFFFFFF)
  for i=1,10 do
    canvas:fillellipse(math.random(500), math.random(400), math.random(15), math.random(15))
  end
  canvas:flip()
  ui.update()
until not win.visible