Enable: low-level drawing and interaction
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Latest commit 682c6bc Dec 2, 2016 @corranwebster corranwebster committed on GitHub Merge pull request #252 from enthought/rel/460
Release 4.6.0
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LICENSE.txt * Egg-building infrastructure improvements (adding README.txt, LICENS… Aug 13, 2007
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image_LICENSE.txt fixed imports to new locations Apr 21, 2011
image_LICENSE_CP.txt Updating license files to match the format of the other projects. Jul 30, 2008
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enable: low-level drawing and interaction


Build status Coverage status

The Enable project provides two related multi-platform packages for drawing GUI objects.

  • Enable: An object drawing library that supports containment and event notification.
  • Kiva: A multi-platform DisplayPDF vector drawing engine.


The Enable package is a multi-platform object drawing library built on top of Kiva. The core of Enable is a container/component model for drawing and event notification. The core concepts of Enable are:

  • Component
  • Container
  • Events (mouse, drag, and key events)

Enable provides a high-level interface for creating GUI objects, while enabling a high level of control over user interaction. Enable is a supporting technology for the Chaco and BlockCanvas projects.


Kiva is a multi-platform DisplayPDF vector drawing engine that supports multiple output backends, including Windows, GTK, and Macintosh native windowing systems, a variety of raster image formats, PDF, and Postscript.

DisplayPDF is more of a convention than an actual specification. It is a path-based drawing API based on a subset of the Adobe PDF specification. Besides basic vector drawing concepts such as paths, rects, line sytles, and the graphics state stack, it also supports pattern fills, antialiasing, and transparency. Perhaps the most popular implementation of DisplayPDF is Apple's Quartz 2-D graphics API in Mac OS X.

Kiva Features

Kiva currently implements the following features:

  • paths and compiled paths; arcs, bezier curves, rectangles
  • graphics state stack
  • clip stack, disjoint rectangular clip regions
  • raster image blitting
  • arbitrary affine transforms of the graphics context
  • bevelled and mitered joins
  • line width, line dash
  • Freetype or native fonts
  • RGB, RGBA, or grayscale color depths
  • transparency


You must have the following libraries installed before building the Enable/Kiva project:

Enable/Kiva also have the following requirements: