Picture.resize() | LuaRT free and open source Windows programming framework for Lua

Picture:resize(factor) method

Resize the Picture by a certain amount.

Parameters

factor

A number indicating the scale factor to apply. Using a value inferior to 1 will shrink the picture. A value superior to 1 will enlarge the Picture.

Return value

This function returns no value.

Example


local ui = require "ui"

-- create a Window
local win = ui.Window("Picture:resize() sample", 512, 380)
-- create an empty Picture
local img = ui.Picture(win, "")
-- create a button
local button = ui.Button(win, "Replay")
-- variable will hold the scale factor
local factor = 0

function button:onClick()
    self:hide()
    factor = 0
end

function win:onResize()
    img:center()
    button:center()
    button.y = img.y+img.height+20
end

-- load image
img:load("LuaRT.png")
win:center()
button:hide()

win:show()

repeat
    ui.update()
    -- stop resizing when factor is inferior to 1
    if factor < 1 then 
        factor = factor + 0.05
        -- resize the Picture
        img:resize(factor)
        img:center()
        if factor >= 1 then
            win:onResize()
            button:show()
        end
    end
until win.visible == false