Copyright	(c) Kilian Kilger Iñaki García Etxebarria 2018
License	LGPL-2.1
Maintainer	kkilger@gmail.com
Stability	experimental
Portability	portable
Safe Haskell	Safe-Inferred
Language	Haskell2010

GI.Cairo.Render.Connector

Description

This library contains glue code to interconnect Haskell GI, i.e. the gi-cairo library and gi-cairo-render, i.e. the hand written cairo bindings for Haskell.

Synopsis

renderWithContext :: MonadIO m => Render a -> Context -> m a
getContext :: Render Context
toRender :: (Context -> IO a) -> Render a

Documentation

renderWithContext Source #

Arguments

:: MonadIO m
=> Render a	Render action
-> Context	Context from gi-cairo
-> m a	Result of the action

This function is used to call a function in the Render monad from the draw function of GTK+. It takes a Context (as it appears in gi-cairo) and a Render action (as it appears in gi-cairo-render) and renders the Render context inside the given context.

getContext Source #

Arguments

:: Render Context

Underlying GI.Cairo.Context

This function is used to call back to functions of GI.Pango or GI.PangoCairo or other Haskell GI libraries from inside the Render action. Example:

draw :: Cairo.Render () 
draw = do ...
          context <- getContext
          somePangoFunction context

toRender :: (Context -> IO a) -> Render a Source #

This function is used to "lift" functions of GI.Pango or GI.PangoCairo to the Render monad. Example:

draw :: Cairo.Render () 
draw = do ...
          toRender somePangoFunction