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

Canvas.visible read/write property

Get or set the Canvas visibility on screen, a true value means that the Canvas is shown, a false value means that the Canvas is hidden.

The Canvas.visible property is also affected by the Canvas:show() and Canvas:hide() methods.

Example


local ui = require "ui"
require "canvas"

-- create a simple Canvas 
local win = ui.Window("Canvas.visible sample", 640, 480)
local Canvas = ui.Canvas(win, 0, 50, 640, 430)
Canvas.fontsize = 28
Canvas:hide()

local button = ui.Button(win, "Show the Canvas widget")
button:center()
button.y = 10

win:show()

function Canvas:onPaint()
  self:clear()
  self:print("Hello, it's me !", 250, 190, math.random(0, 0xFFFFFFFF))
end

function button:onClick()
  Canvas.visible = true
end

while win.visible do
  ui.update()
end