How do I use Kivy in Python?

Basically, set your image file name under source attribute under “Image” in kivy. kv (file) . Remember to set a clock schedule once as above and you can make your modification of your photo. You can even add some photo looping (dynamically) by changing the clock scheduler to Clock.14 May 2014

The basic idea is that the user will drag his mouse over the image to crop it . To that end, when you click “Crop”, the user can select a lower left point, then drag the rectangle up to the top right. The rectangle should shade the outside area not selected.