Developer's Guide	The Design of Sketch

Introduction

This document describes the implementation of at least some parts of Sketch. It is meant for anyone who wants to find out how Sketch is implemented, how to extend Sketch with new object types or wants to contribute to Sketch.

I'll assume that you are familiar with Sketch from the user's point of view and that you have some experience in Python programming. If you don't know Python yet, have a look at the Python tutorial (contained in the standard documentation for Python which is distributed as a separate package)

Some of the topics discussed in this document might be of interest to developers of other Python applications as well. In particular, these topics are the undo mechanism and the user interface

	Developer's Guide	The Design of Sketch