GI.Gtk.Declarative.App.Simple

A simple application architecture style inspired by PureScript's Pux framework.

Documentation

data App window state event

Describes an state reducer application.

Constructors

App

Fields

• update :: state -> event -> Transition state event

  The update function of an application reduces the current state and a new event to a Transition, which decides if and how to transition to the next state.

• view :: state -> AppView window event

  The view renders a state value as a window, parameterized by the Apps event type.

• inputs :: [Producer event IO ()]

  Inputs are pipes Producers that feed events into the application.

• initialState :: state

  The initial state value of the state reduction loop.

type AppView window event = Bin window event

The top-level widget for the view function of an App, requiring a GTK+ Window.

data Transition state event

The result of applying the update function, deciding if and how to transition to the next state.

Constructors

Transition state (IO (Maybe event))

Exit

Exit the application.

run

Arguments

:: IsBin window

=> App window state event

Application to run

-> IO state

Initialize GTK and run the application in it. This is a convenience function that is highly recommended. If you need more flexibility, e.g. to set up GTK+ yourself, use runLoop instead.

runLoop :: IsBin window => App window state event -> IO state

Run an App. This IO action will loop, so run it in a separate thread using async if you're calling it before the GTK main loop.

    void $ Gtk.init Nothing
    void . async $ do
      runLoop app
      -- In case the run loop exits, quit the main GTK loop.
      Gtk.mainQuit
    Gtk.main