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

Canvas.align readwrite property

Get or set the Canvas alignment, which position and size will be aligned relative to its parent (alignment persists even if the size of the parent changes).

This property uses a string to specify the Canvas alignment :

"all" : the Canvas will be aligned along all the parent borders (and will cover the entire parent client area).
"bottom" : the Canvas will be aligned along the bottom border of the parent, preserving its height.
"top" : the Canvas will be aligned along the the top border of the parent, preserving its height.
"right" : the Canvas will be aligned along the right border of the parent, preserving its width.
"left" : the Canvas will be aligned along the left border of the parent, preserving its width.

Example


local ui = require "ui"
require "canvas"

-- create a fixed Window
local win = ui.Window("Canvas:align() sample", "fixed", 320, 200)

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

-- align the Canvas in all of its parent area 
canvas.align = "all"

-- set the onPaint() event handler to draw on the canvas
function canvas:onPaint()
    self:begin()
    self:clear()
    self:print("Hello World !", 10, 10)
    self:flip()
end

-- shows the Window and update ui asynchronously
ui.run(win):wait()