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This documentation describes Haggis, a user interface framework in and for Haskell that brings graphical interaction and user interface construction into a functional setting.

This documentation is meant to act as a combined user's guide and reference manual for the Haggis system. It is divided up into three different chunks: a tutorial on how to create your own Haggis programs, a section that describes the core ideas and concepts and finally a (large) section documenting the abstractions provided in detail.

This is edition 0.2 and the documentation is still a bit rough, please bear with me while I iron out the details.

• Introduction: What exactly is this Haggis thing?
• Tutorial: A tutorial introduction to writing Haggis programs.
• Setting up: What you have to do before starting to use it.
• Examples: Basic examples of Haggis in action.
• Overview: The different parts of the system.
• Haggis core: The basic framework.
• User interface components: A catalogue of useful UI abstractions built on top of the core.
• Graphical abstractions: Constructing and drawing pictures.
• Geometric abstractions: Geometric and other support abstractions.
• Window system interface: Acessing the underlying window system.
• Other resources: Pointers to other Haskell and Haggis related pieces of inexampleion.
• Todo: An evergrowing list.