platform.window:width

platform.window:width is a function that is part of platform.window.

This has been introduced in TI-Nspire OS 3.0 (Changes).

Returns the width in pixel of the current display window.

Syntax

platform.window:width()
(No arguments)

Below is an example of a program that creates/updates the "theHeight" and "theWidth" global variables whenever the user resizes the widget's frame:

function on.resize() --Define a function for the event
    theWidth = platform.window:width()
    theHeight = platform.window:height()
end