RadialGradient.center

RadialGradient.center readwrite

Get or set the center coordinates of the gradient ellipse

Example


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

-- create a simple Window
local win = ui.Window("RadialGradient.center sample", "fixed", 500, 400)

-- create a Canvas
local canvas = ui.Canvas(win)
canvas.align = "all"

local gradient = canvas:RadialGradient { [0] = 0x00FFFFFF, [1] = 0x00008bFF }
gradient.center = { canvas.width/2, canvas.height/2 }
gradient.radius = { canvas.width/2, canvas.height/2 }

function canvas:onPaint()
  self:fillrect(0, 0, canvas.width, canvas.height, gradient)
end

function canvas:onHover(x,y buttons)
  gradient.center = { x, y }
end

win:show()

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