happlets: "Haskell Applets" provides an event handler and a canvas for building simple GUI apps.
This package is provides the Happlets API that is common to all Happlet back-end provider libraries. Along with this package, it is necessary to install a back-end library such as 'happlets-lib-gtk'. Currently Gtk+ version 2 with a Cairo-based canvas is the only back-end available. Gtk+ version 3, Xlib, SDL2, GLUT, and (possibly) Wayland back-ends are all feasible and may be implemented in the future.
The goal of the Happlets project is to allow you to create very simple, thread-safe applications that contain nothing more than a single window with a drawing canvas that can respond to user input events, like mouse clicks, key-presses, or frame animation events. The intention is to create a minimal programming platform for small, single-purpose graphical applications which simply displays some interactive graphic, for example a plot of some data, or a simple game. Naturally, the Happlet program can be arbitrarily complex, but it may be better to consider other, FRP-based solutions if managing events becomes too difficult.
A happlet back-end provider may provide additional widget API functions, but using these APIs will result in your applet being dependent on the specific back-end and will thus not be as portable as programming for the "happlets" package alone. Happlets aims to achieve a balance between being as minimal as possible, but still provide enough graphics drawing primitives to be useful for the widest range of possible applications.
The Gtk+ v2 back-end provider can be downloaded from this link:
|Dependencies||base (>=4.7 && <4.9), bytestring (>=0.10.0.0 && <188.8.131.52), colour (>=2.0.0 && <3.0.0), containers (>=0.5.5.0 && <=0.5.7.0), fail (>=4.7 && <5.0), lens (>=184.108.40.206 && <220.127.116.11), linear (>=1.20.0 && <18.104.22.168), mtl (>=2.2.0 && <=2.2.1), semigroups (>=0.16.0 && <0.19.0), text (>=22.214.171.124 && <=126.96.36.199), time (>=188.8.131.52 && <=184.108.40.206), transformers (>=0.1.1 && <0.5.0), unordered-containers (>=0.2.0.0 && <=0.3.0.0) [details]|
|Copyright||(C) 2017-2018 Ramin Honary, all rights reserved.|
|Uploaded||by RaminHonary at 2018-05-25T23:53:24Z|
|Downloads||753 total (2 in the last 30 days)|
|Rating||(no votes yet) [estimated by Bayesian average]|
|Status||Docs not available [build log]
All reported builds failed as of 2018-05-26 [all 3 reports]