GI.PangoCairo.Callbacks

Signals

ShapeRendererFunc

type C_ShapeRendererFunc = Ptr Context -> Ptr AttrShape -> CInt -> Ptr () -> IO ()

Type for the callback on the (unwrapped) C side.

type ShapeRendererFunc

Arguments

 = Context

cr: a Cairo context with current point set to where the shape should be rendered

-> AttrShape

attr: the AttrTypeShape to render

-> Bool

doPath: whether only the shape path should be appended to current path of cr and no filling/stroking done. This will be set to True when called from layoutPath and layoutLinePath rendering functions.

-> Ptr ()

data: user data passed to contextSetShapeRenderer

-> IO ()

Function type for rendering attributes of type AttrTypeShape with Pango's Cairo renderer.

dynamic_ShapeRendererFunc

Arguments

:: (HasCallStack, MonadIO m)

=> FunPtr C_ShapeRendererFunc

-> Context

cr: a Cairo context with current point set to where the shape should be rendered

-> AttrShape

attr: the AttrTypeShape to render

-> Bool

doPath: whether only the shape path should be appended to current path of cr and no filling/stroking done. This will be set to True when called from layoutPath and layoutLinePath rendering functions.

-> Ptr ()

data: user data passed to contextSetShapeRenderer

-> m ()

Given a pointer to a foreign C function, wrap it into a function callable from Haskell.

genClosure_ShapeRendererFunc :: MonadIO m => ShapeRendererFunc -> m (GClosure C_ShapeRendererFunc)

Wrap the callback into a GClosure.

mk_ShapeRendererFunc :: C_ShapeRendererFunc -> IO (FunPtr C_ShapeRendererFunc)

Generate a function pointer callable from C code, from a C_ShapeRendererFunc.

noShapeRendererFunc :: Maybe ShapeRendererFunc

A convenience synonym for Nothing :: Maybe ShapeRendererFunc.

wrap_ShapeRendererFunc :: Maybe (Ptr (FunPtr C_ShapeRendererFunc)) -> ShapeRendererFunc -> C_ShapeRendererFunc

Wrap a ShapeRendererFunc into a C_ShapeRendererFunc.