Canvas:clear( [ color ] ) method
Clears the Canvas drawing surface with the current Canvas.bgcolor or with the provided RGBA color.
Parameters
[ x ]
An optional interger representing a RGBA color value to clear and fill the Canvas with, or the current Canvas background color if omitted.
Return value
This function returns no value.Example
local ui = require "ui"
require "canvas"
-- create a simple Window
local win = ui.Window("Canvas.clear() sample", "fixed", 320, 200)
-- create a Canvas
local canvas = ui.Canvas(win)
canvas.align = "all"
canvas.sync = false
win:show()
-- update user interface
repeat
canvas:begin()
canvas:clear(math.random(0xFFFFFF00)+0xFF)
canvas:flip()
ui.update()
sleep(250)
until not win.visible