Use AppleScript to create a PPI Calculator?

Discussion in 'Mac Programming' started by TheMTtakeover, Dec 25, 2012.

  1. macrumors 6502

    Aug 3, 2011
    I was wondering if someone has seen or has code or know's how to go about coding something like this. I essentially want the apple script to run numbers through the following equations.


    I want it to come up and ask for the width resolution in pixels, the height resolution in pixels, and diagonal size in inches and then take those numbers and to calculate the diagonal resolution in pixel and then from there calculate the PPI.

    Any help at all is greatly appreciated!
  2. macrumors newbie

    Dec 26, 2012

    Just wrote this, and gave it a try for my 13.3 inch (1440x900) pixels display, that gave me a ppi of 128, which is correct, as far as I know.

    set diagInInches to text returned of (display dialog "Enter the Diagonal Screen Size in inches :" default answer "?")
    set screenResX to text returned of (display dialog "Enter horizontal screen size in pixels (x)" default answer "?")
    set screenResY to text returned of (display dialog "Enter vertical screen size in pixels (y)" default answer "?")
    set dp to (screenResX * screenResX + screenResY * screenResY) ^ (1 / 2)
    set ppi to dp / diagInInches
    display dialog "PPI for a " & diagInInches & " inch screen, with a resolution of " & screenResX & "x" & screenResY & " pixels, is " & (round (ppi * 100) / 100)
    Best regards

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