Picture:load()

Picture:load(file, [width], [height])method

Change the Picture image by loading it from a file on disk.

Parameters

file

A File object or a filename string, representing the image file whose content will be loaded.

[width]

An optional number indicating the new width of the Picture widget, defaulting to the image width.

[height]

An optional number indicating the new height of the Picture widget, defaulting to the image height.

Return value

This function returns true if the image loading succeeded, or false otherwise.

Example


--! luart-extensions
import ui

local win = ui.Window("Picture.load() and save() example", 512, 380)

-- create an empty Picture object
local img = ui.Picture(win, "")

-- load the image from disk
img:load(sys.File(arg[0]).path.."\\LuaRT.png")

-- center the Picture on the window
img:center()

-- create a button
local button = ui.Button(win, "Save picture to...")
button:center()
button.y = img.y + img.height + 30

-- button onClick event handler
function button:onClick()
    local file = ui.savedialog("Save picture as...", false, "All files (*.*)|*.*|PNG image files (*.png)|*.png|JPEG image files (*.jpg)|*.jpg|Bitmap image files (*.bmp)|*.bmp|GIF image files (*.gif)|*.gif|ICO image files (*.ico)|*.ico|TIFF image files (*.tiff)|*.tiff")
    if file ~= nil and (not file.exists or (file.exists and ui.confirm(file.fullpath.." already exists. Continue and overwrite its content ?") == "yes")) then
        if img:save(file) then
            win:status("Picture saved as "..file.fullpath)
        end
    end
end

win:center()

win:show()


repeat
    ui.update()
until win.visible == false