Difference between revisions of "LGtk"

Latest revision as of 21:08, 22 July 2023

LGtk is a GUI Toolkit.

Main goals of LGtk:

Provide a Haskell EDSL for declarative description of interactive graphical applications
Provide an API for custom widget design
Provide a playground for high-level declarative features like derived state-save and undo-redo operations and type-driven GUI generation

Internal links

Should be revised:

@@ Line 1: / Line 1: @@
 [[Category:User interfaces]]
-LGtk is a lens-based API for Gtk.
+LGtk is a GUI Toolkit.
-LGtk is built on Gtk2Hs.
+Main goals of LGtk:
-== Introduction ==
+* Provide a Haskell EDSL for declarative description of interactive graphical applications
-Most Haskellers would like to use a mature FRP-based API for creating graphical user interfaces.
+* Provide an API for custom widget design
-FRP may not be the best tool for special user interfaces, like interfaces which consists of buttons, checkboxes, combo boxes, text entries and menus only.
+* Provide a playground for high-level declarative features like derived state-save and undo-redo operations and type-driven GUI generation
-LGtk has a lens-based API which fits better these user interfaces.
+[[Image:Lgtkdemo.png]]
 == Internal links ==
+Should be revised:
 * [[LGtk/Semantics]]
 * [[LGtk/ADT_lenses]]
-== Examples ==
-=== Hello World ===
-<haskell>
-main = runWidget $ label $ return "Hello World!"
-</haskell>
-<hask>return</hask> is neded because labels may be dynamic, see the next examples.
-=== Copy ===
-The following applications presents an entry and a label below of it.
-When a text is entered in the entry, the label is changed to the entered text.
-<haskell>
-main = runWidget $ action $ do
-   r <- newRef "enter text here"
-   return $ vcat
-       [ entry r
-       , label $ readRef r
-       ]
-</haskell>
-<hask>action</hask> gives acces to a monad in which new references can be made by <hask>newRef</hask>.
-A crutial feature of LGtk is that you cannot change the value of references in this monad (you can read them though).
-<hask>label</hask> gives acces to a monad in which you can read references but no reference creation or write is possible.
-=== Addition ===
-Two entries of integers and a label which shows the sum:
-<haskell>
-main = runWidget $ action $ do
-   r1 <- newRef (12 :: Integer)
-   r2 <- newRef 4
-   return $ vcat
-       [ entryShow r1
-       , entryShow r2
-       , label $ liftM show $ liftM2 (+) (readRef r1) (readRef r2)
-       ]
-</haskell>
-=== Complex examples ===
-You can find more complex examples in the source code of LGtk.
-More examples will be presented here also.
-[[Image:Lgtkdemo.png]]
-== Status ==
-Features of lgtk-0.5
-* The API is closed, you can safely use any constructs as far as you obey the documented laws.
-* Support for asynchronous events. Using LGtk is a safe way for writing multithreaded Gtk applications.
-* The semantics is getting stable but it is not yet documented.
-TODO list:
-* Add an efficient implementation for LGtk. LGtk has only a reference implementation currently.
-* Add support for styles (layout, colors, etc).
-* Support more Gtk constructs.
-== Demo application ==
-You can try the demo application with the following commands:
- cabal install gtk2hs-buildtools
- cabal install lgtk
- lgtkdemo
-== Changelog ==
-=== lgtk-0.5.1 ===
-* Documentation fixes and cleanup
-* Try to support Haskell Platform 2012.4.0.0
-=== lgtk-0.5 ===
-* Do not use monadic lenses any more.
-* Support for asynchronous events.
-* Lazily created tabs.
-* Unactive tabs are really unactive (event handlers are detached).
-* File references watch the files. When the file changes, the GUI is updated.
-* References with inherent identity (makes defining auto-sensitive buttons easier)
-* Experimental support for colored buttons.
-* More examples in the demo application.
-* Lots of inner changes.
 == External links ==
-* [http://hackage.haskell.org/package/lgtk API documentation at HackageDB]
+* [http://hackage.haskell.org/package/lgtk Haddock documentation on HackageDB]
-* [http://hub.darcs.net/divip/lgtk Darcs repo on hub.darcs.net]
+* [https://github.com/divipp/lgtk GitHub repository]
 * [http://people.inf.elte.hu/divip/LGtk/LGtk.html Initial announcement]
+* [http://www.haskell.org/haskellwiki/LGtk haskell.org wiki page (this page)]
 Related Stackoverflow questions:
@@ Line 121: / Line 32: @@
 Reddit comments:
-* [http://www.reddit.com/r/haskell/comments/1cemr2/lgtk_lensbased_gtk_interface/ 15 April]
+* [http://www.reddit.com/r/haskell/comments/1cemr2/lgtk_lensbased_gtk_interface/ 15 April 2013]
-* [http://www.reddit.com/r/haskell/comments/1cj0o6/lgtk_api_fixed/ 17 April]
+* [http://www.reddit.com/r/haskell/comments/1cj0o6/lgtk_api_fixed/ 17 April 2013]
-* [http://www.reddit.com/r/haskell/comments/1f5m5j/ann_lgtk_05/ 27 May]
+* [http://www.reddit.com/r/haskell/comments/1f5m5j/ann_lgtk_05/ 27 May 2013]
-* [http://www.reddit.com/r/haskell/comments/1fjerf/lens_chains_lgtk_semantics_first_part/ 2 June]
+* [http://www.reddit.com/r/haskell/comments/1fjerf/lens_chains_lgtk_semantics_first_part/ 2 June 2013]
+* [http://www.reddit.com/r/haskell/comments/25k9x1/ann_lgtk08/ 14 May 2014]

Difference between revisions of "LGtk"

Latest revision as of 21:08, 22 July 2023

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