Safe Haskell	None
Language	Haskell2010

GI.Gtk.Declarative.App.Simple

Description

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

Synopsis

data App window state event = App {
- update :: state -> event -> Transition state event
- view :: state -> AppView window event
- inputs :: [Producer event IO ()]
- initialState :: state
}
type AppView window event = Bin window Widget event
data Transition state event
- = Transition state (IO (Maybe event))
- | Exit
run :: (Typeable event, BinChild window Widget) => App window state event -> IO state
runLoop :: (Typeable event, BinChild window Widget) => App window state event -> IO state

Documentation

data App window state event Source #

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 Widget event Source #

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

data Transition state event Source #

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 Source #

Arguments

:: (Typeable event, BinChild window Widget)
=> 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 :: (Typeable event, BinChild window Widget) => App window state event -> IO state Source #

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