Canvas:begin()

Canvas:begin()method

Starts drawing operations on the Canvas.

Return value

This function returns no value.

Example


--! luart-extensions
import ui
require "canvas"

-- create a simple window
local win = ui.Window("canvas.onPaint() sample", "fixed", 500, 400)
local canvas = ui.Canvas(win)
canvas.align = "all"

function canvas:onPaint()
    -- Alternates canvas fill using a random color...
    self:begin()
    self:clear(math.random(0xFFFFFFFF))
    self:flip()
    sleep(250)
    -- ...and a red color
    self:begin()
    self:clear(0xFF0000FF)
    self:flip()
    sleep(250)
end

await win:showasync()