{-# LANGUAGE TypeApplications #-}


-- | Copyright  : Will Thompson and Iñaki García Etxebarria
-- License    : LGPL-2.1
-- Maintainer : Iñaki García Etxebarria
-- 
-- GtkGradient is a boxed type that represents a gradient.
-- It is the result of parsing a
-- [gradient expression][gtkcssprovider-gradients].
-- To obtain the gradient represented by a GtkGradient, it has to
-- be resolved with 'GI.Gtk.Structs.Gradient.gradientResolve', which replaces all
-- symbolic color references by the colors they refer to (in a given
-- context) and constructs a t'GI.Cairo.Structs.Pattern.Pattern' value.
-- 
-- It is not normally necessary to deal directly with @/GtkGradients/@,
-- since they are mostly used behind the scenes by t'GI.Gtk.Objects.StyleContext.StyleContext' and
-- t'GI.Gtk.Objects.CssProvider.CssProvider'.
-- 
-- t'GI.Gtk.Structs.Gradient.Gradient' is deprecated. It was used internally by GTK’s CSS engine
-- to represent gradients. As its handling is not conforming to modern
-- web standards, it is not used anymore. If you want to use gradients in
-- your own code, please use Cairo directly.

#if (MIN_VERSION_haskell_gi_overloading(1,0,0) && !defined(__HADDOCK_VERSION__))
#define ENABLE_OVERLOADING
#endif

module GI.Gtk.Structs.Gradient
    ( 

-- * Exported types
    Gradient(..)                            ,


 -- * Methods
-- | 
-- 
--  === __Click to display all available methods, including inherited ones__
-- ==== Methods
-- [addColorStop]("GI.Gtk.Structs.Gradient#g:method:addColorStop"), [ref]("GI.Gtk.Structs.Gradient#g:method:ref"), [resolve]("GI.Gtk.Structs.Gradient#g:method:resolve"), [resolveForContext]("GI.Gtk.Structs.Gradient#g:method:resolveForContext"), [toString]("GI.Gtk.Structs.Gradient#g:method:toString"), [unref]("GI.Gtk.Structs.Gradient#g:method:unref").
-- 
-- ==== Getters
-- /None/.
-- 
-- ==== Setters
-- /None/.

#if defined(ENABLE_OVERLOADING)
    ResolveGradientMethod                   ,
#endif

-- ** addColorStop #method:addColorStop#

#if defined(ENABLE_OVERLOADING)
    GradientAddColorStopMethodInfo          ,
#endif
    gradientAddColorStop                    ,


-- ** newLinear #method:newLinear#

    gradientNewLinear                       ,


-- ** newRadial #method:newRadial#

    gradientNewRadial                       ,


-- ** ref #method:ref#

#if defined(ENABLE_OVERLOADING)
    GradientRefMethodInfo                   ,
#endif
    gradientRef                             ,


-- ** resolve #method:resolve#

#if defined(ENABLE_OVERLOADING)
    GradientResolveMethodInfo               ,
#endif
    gradientResolve                         ,


-- ** resolveForContext #method:resolveForContext#

#if defined(ENABLE_OVERLOADING)
    GradientResolveForContextMethodInfo     ,
#endif
    gradientResolveForContext               ,


-- ** toString #method:toString#

#if defined(ENABLE_OVERLOADING)
    GradientToStringMethodInfo              ,
#endif
    gradientToString                        ,


-- ** unref #method:unref#

#if defined(ENABLE_OVERLOADING)
    GradientUnrefMethodInfo                 ,
#endif
    gradientUnref                           ,




    ) where

import Data.GI.Base.ShortPrelude
import qualified Data.GI.Base.ShortPrelude as SP
import qualified Data.GI.Base.Overloading as O
import qualified Prelude as P

import qualified Data.GI.Base.Attributes as GI.Attributes
import qualified Data.GI.Base.BasicTypes as B.Types
import qualified Data.GI.Base.ManagedPtr as B.ManagedPtr
import qualified Data.GI.Base.GArray as B.GArray
import qualified Data.GI.Base.GClosure as B.GClosure
import qualified Data.GI.Base.GError as B.GError
import qualified Data.GI.Base.GHashTable as B.GHT
import qualified Data.GI.Base.GVariant as B.GVariant
import qualified Data.GI.Base.GValue as B.GValue
import qualified Data.GI.Base.GParamSpec as B.GParamSpec
import qualified Data.GI.Base.CallStack as B.CallStack
import qualified Data.GI.Base.Properties as B.Properties
import qualified Data.GI.Base.Signals as B.Signals
import qualified Control.Monad.IO.Class as MIO
import qualified Data.Coerce as Coerce
import qualified Data.Text as T
import qualified Data.Kind as DK
import qualified Data.ByteString.Char8 as B
import qualified Data.Map as Map
import qualified Foreign.Ptr as FP
import qualified GHC.OverloadedLabels as OL
import qualified GHC.Records as R

import qualified GI.Cairo.Structs.Pattern as Cairo.Pattern
import {-# SOURCE #-} qualified GI.Gtk.Objects.StyleContext as Gtk.StyleContext
import {-# SOURCE #-} qualified GI.Gtk.Objects.StyleProperties as Gtk.StyleProperties
import {-# SOURCE #-} qualified GI.Gtk.Structs.SymbolicColor as Gtk.SymbolicColor

-- | Memory-managed wrapper type.
newtype Gradient = Gradient (SP.ManagedPtr Gradient)
    deriving (Gradient -> Gradient -> Bool
(Gradient -> Gradient -> Bool)
-> (Gradient -> Gradient -> Bool) -> Eq Gradient
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
$c== :: Gradient -> Gradient -> Bool
== :: Gradient -> Gradient -> Bool
$c/= :: Gradient -> Gradient -> Bool
/= :: Gradient -> Gradient -> Bool
Eq)

instance SP.ManagedPtrNewtype Gradient where
    toManagedPtr :: Gradient -> ManagedPtr Gradient
toManagedPtr (Gradient ManagedPtr Gradient
p) = ManagedPtr Gradient
p

foreign import ccall "gtk_gradient_get_type" c_gtk_gradient_get_type :: 
    IO GType

type instance O.ParentTypes Gradient = '[]
instance O.HasParentTypes Gradient

instance B.Types.TypedObject Gradient where
    glibType :: IO GType
glibType = IO GType
c_gtk_gradient_get_type

instance B.Types.GBoxed Gradient

-- | Convert 'Gradient' to and from 'Data.GI.Base.GValue.GValue'. See 'Data.GI.Base.GValue.toGValue' and 'Data.GI.Base.GValue.fromGValue'.
instance B.GValue.IsGValue (Maybe Gradient) where
    gvalueGType_ :: IO GType
gvalueGType_ = IO GType
c_gtk_gradient_get_type
    gvalueSet_ :: Ptr GValue -> Maybe Gradient -> IO ()
gvalueSet_ Ptr GValue
gv Maybe Gradient
P.Nothing = Ptr GValue -> Ptr Gradient -> IO ()
forall a. Ptr GValue -> Ptr a -> IO ()
B.GValue.set_boxed Ptr GValue
gv (Ptr Gradient
forall a. Ptr a
FP.nullPtr :: FP.Ptr Gradient)
    gvalueSet_ Ptr GValue
gv (P.Just Gradient
obj) = Gradient -> (Ptr Gradient -> IO ()) -> IO ()
forall a c.
(HasCallStack, ManagedPtrNewtype a) =>
a -> (Ptr a -> IO c) -> IO c
B.ManagedPtr.withManagedPtr Gradient
obj (Ptr GValue -> Ptr Gradient -> IO ()
forall a. Ptr GValue -> Ptr a -> IO ()
B.GValue.set_boxed Ptr GValue
gv)
    gvalueGet_ :: Ptr GValue -> IO (Maybe Gradient)
gvalueGet_ Ptr GValue
gv = do
        Ptr Gradient
ptr <- Ptr GValue -> IO (Ptr Gradient)
forall b. Ptr GValue -> IO (Ptr b)
B.GValue.get_boxed Ptr GValue
gv :: IO (Ptr Gradient)
        if Ptr Gradient
ptr Ptr Gradient -> Ptr Gradient -> Bool
forall a. Eq a => a -> a -> Bool
/= Ptr Gradient
forall a. Ptr a
FP.nullPtr
        then Gradient -> Maybe Gradient
forall a. a -> Maybe a
P.Just (Gradient -> Maybe Gradient) -> IO Gradient -> IO (Maybe Gradient)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> (ManagedPtr Gradient -> Gradient) -> Ptr Gradient -> IO Gradient
forall a.
(HasCallStack, GBoxed a) =>
(ManagedPtr a -> a) -> Ptr a -> IO a
B.ManagedPtr.newBoxed ManagedPtr Gradient -> Gradient
Gradient Ptr Gradient
ptr
        else Maybe Gradient -> IO (Maybe Gradient)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Maybe Gradient
forall a. Maybe a
P.Nothing
        
    


#if defined(ENABLE_OVERLOADING)
instance O.HasAttributeList Gradient
type instance O.AttributeList Gradient = GradientAttributeList
type GradientAttributeList = ('[ ] :: [(Symbol, DK.Type)])
#endif

-- method Gradient::new_linear
-- method type : Constructor
-- Args: [ Arg
--           { argCName = "x0"
--           , argType = TBasicType TDouble
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "X coordinate of the starting point"
--                 , sinceVersion = Nothing
--                 }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       , Arg
--           { argCName = "y0"
--           , argType = TBasicType TDouble
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "Y coordinate of the starting point"
--                 , sinceVersion = Nothing
--                 }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       , Arg
--           { argCName = "x1"
--           , argType = TBasicType TDouble
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "X coordinate of the end point"
--                 , sinceVersion = Nothing
--                 }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       , Arg
--           { argCName = "y1"
--           , argType = TBasicType TDouble
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "Y coordinate of the end point"
--                 , sinceVersion = Nothing
--                 }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       ]
-- Lengths: []
-- returnType: Just (TInterface Name { namespace = "Gtk" , name = "Gradient" })
-- throws : False
-- Skip return : False

foreign import ccall "gtk_gradient_new_linear" gtk_gradient_new_linear :: 
    CDouble ->                              -- x0 : TBasicType TDouble
    CDouble ->                              -- y0 : TBasicType TDouble
    CDouble ->                              -- x1 : TBasicType TDouble
    CDouble ->                              -- y1 : TBasicType TDouble
    IO (Ptr Gradient)

{-# DEPRECATED gradientNewLinear ["(Since version 3.8)","t'GI.Gtk.Structs.Gradient.Gradient' is deprecated."] #-}
-- | Creates a new linear gradient along the line defined by (x0, y0) and (x1, y1). Before using the gradient
-- a number of stop colors must be added through 'GI.Gtk.Structs.Gradient.gradientAddColorStop'.
-- 
-- /Since: 3.0/
gradientNewLinear ::
    (B.CallStack.HasCallStack, MonadIO m) =>
    Double
    -- ^ /@x0@/: X coordinate of the starting point
    -> Double
    -- ^ /@y0@/: Y coordinate of the starting point
    -> Double
    -- ^ /@x1@/: X coordinate of the end point
    -> Double
    -- ^ /@y1@/: Y coordinate of the end point
    -> m Gradient
    -- ^ __Returns:__ A newly created t'GI.Gtk.Structs.Gradient.Gradient'
gradientNewLinear :: forall (m :: * -> *).
(HasCallStack, MonadIO m) =>
Double -> Double -> Double -> Double -> m Gradient
gradientNewLinear Double
x0 Double
y0 Double
x1 Double
y1 = IO Gradient -> m Gradient
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Gradient -> m Gradient) -> IO Gradient -> m Gradient
forall a b. (a -> b) -> a -> b
$ do
    let x0' :: CDouble
x0' = Double -> CDouble
forall a b. (Real a, Fractional b) => a -> b
realToFrac Double
x0
    let y0' :: CDouble
y0' = Double -> CDouble
forall a b. (Real a, Fractional b) => a -> b
realToFrac Double
y0
    let x1' :: CDouble
x1' = Double -> CDouble
forall a b. (Real a, Fractional b) => a -> b
realToFrac Double
x1
    let y1' :: CDouble
y1' = Double -> CDouble
forall a b. (Real a, Fractional b) => a -> b
realToFrac Double
y1
    Ptr Gradient
result <- CDouble -> CDouble -> CDouble -> CDouble -> IO (Ptr Gradient)
gtk_gradient_new_linear CDouble
x0' CDouble
y0' CDouble
x1' CDouble
y1'
    Text -> Ptr Gradient -> IO ()
forall a. HasCallStack => Text -> Ptr a -> IO ()
checkUnexpectedReturnNULL Text
"gradientNewLinear" Ptr Gradient
result
    Gradient
result' <- ((ManagedPtr Gradient -> Gradient) -> Ptr Gradient -> IO Gradient
forall a.
(HasCallStack, GBoxed a) =>
(ManagedPtr a -> a) -> Ptr a -> IO a
wrapBoxed ManagedPtr Gradient -> Gradient
Gradient) Ptr Gradient
result
    Gradient -> IO Gradient
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Gradient
result'

#if defined(ENABLE_OVERLOADING)
#endif

-- method Gradient::new_radial
-- method type : Constructor
-- Args: [ Arg
--           { argCName = "x0"
--           , argType = TBasicType TDouble
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "X coordinate of the start circle"
--                 , sinceVersion = Nothing
--                 }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       , Arg
--           { argCName = "y0"
--           , argType = TBasicType TDouble
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "Y coordinate of the start circle"
--                 , sinceVersion = Nothing
--                 }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       , Arg
--           { argCName = "radius0"
--           , argType = TBasicType TDouble
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "radius of the start circle"
--                 , sinceVersion = Nothing
--                 }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       , Arg
--           { argCName = "x1"
--           , argType = TBasicType TDouble
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "X coordinate of the end circle"
--                 , sinceVersion = Nothing
--                 }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       , Arg
--           { argCName = "y1"
--           , argType = TBasicType TDouble
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "Y coordinate of the end circle"
--                 , sinceVersion = Nothing
--                 }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       , Arg
--           { argCName = "radius1"
--           , argType = TBasicType TDouble
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "radius of the end circle"
--                 , sinceVersion = Nothing
--                 }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       ]
-- Lengths: []
-- returnType: Just (TInterface Name { namespace = "Gtk" , name = "Gradient" })
-- throws : False
-- Skip return : False

foreign import ccall "gtk_gradient_new_radial" gtk_gradient_new_radial :: 
    CDouble ->                              -- x0 : TBasicType TDouble
    CDouble ->                              -- y0 : TBasicType TDouble
    CDouble ->                              -- radius0 : TBasicType TDouble
    CDouble ->                              -- x1 : TBasicType TDouble
    CDouble ->                              -- y1 : TBasicType TDouble
    CDouble ->                              -- radius1 : TBasicType TDouble
    IO (Ptr Gradient)

{-# DEPRECATED gradientNewRadial ["(Since version 3.8)","t'GI.Gtk.Structs.Gradient.Gradient' is deprecated."] #-}
-- | Creates a new radial gradient along the two circles defined by (x0, y0, radius0) and
-- (x1, y1, radius1). Before using the gradient a number of stop colors must be added
-- through 'GI.Gtk.Structs.Gradient.gradientAddColorStop'.
-- 
-- /Since: 3.0/
gradientNewRadial ::
    (B.CallStack.HasCallStack, MonadIO m) =>
    Double
    -- ^ /@x0@/: X coordinate of the start circle
    -> Double
    -- ^ /@y0@/: Y coordinate of the start circle
    -> Double
    -- ^ /@radius0@/: radius of the start circle
    -> Double
    -- ^ /@x1@/: X coordinate of the end circle
    -> Double
    -- ^ /@y1@/: Y coordinate of the end circle
    -> Double
    -- ^ /@radius1@/: radius of the end circle
    -> m Gradient
    -- ^ __Returns:__ A newly created t'GI.Gtk.Structs.Gradient.Gradient'
gradientNewRadial :: forall (m :: * -> *).
(HasCallStack, MonadIO m) =>
Double
-> Double -> Double -> Double -> Double -> Double -> m Gradient
gradientNewRadial Double
x0 Double
y0 Double
radius0 Double
x1 Double
y1 Double
radius1 = IO Gradient -> m Gradient
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Gradient -> m Gradient) -> IO Gradient -> m Gradient
forall a b. (a -> b) -> a -> b
$ do
    let x0' :: CDouble
x0' = Double -> CDouble
forall a b. (Real a, Fractional b) => a -> b
realToFrac Double
x0
    let y0' :: CDouble
y0' = Double -> CDouble
forall a b. (Real a, Fractional b) => a -> b
realToFrac Double
y0
    let radius0' :: CDouble
radius0' = Double -> CDouble
forall a b. (Real a, Fractional b) => a -> b
realToFrac Double
radius0
    let x1' :: CDouble
x1' = Double -> CDouble
forall a b. (Real a, Fractional b) => a -> b
realToFrac Double
x1
    let y1' :: CDouble
y1' = Double -> CDouble
forall a b. (Real a, Fractional b) => a -> b
realToFrac Double
y1
    let radius1' :: CDouble
radius1' = Double -> CDouble
forall a b. (Real a, Fractional b) => a -> b
realToFrac Double
radius1
    Ptr Gradient
result <- CDouble
-> CDouble
-> CDouble
-> CDouble
-> CDouble
-> CDouble
-> IO (Ptr Gradient)
gtk_gradient_new_radial CDouble
x0' CDouble
y0' CDouble
radius0' CDouble
x1' CDouble
y1' CDouble
radius1'
    Text -> Ptr Gradient -> IO ()
forall a. HasCallStack => Text -> Ptr a -> IO ()
checkUnexpectedReturnNULL Text
"gradientNewRadial" Ptr Gradient
result
    Gradient
result' <- ((ManagedPtr Gradient -> Gradient) -> Ptr Gradient -> IO Gradient
forall a.
(HasCallStack, GBoxed a) =>
(ManagedPtr a -> a) -> Ptr a -> IO a
wrapBoxed ManagedPtr Gradient -> Gradient
Gradient) Ptr Gradient
result
    Gradient -> IO Gradient
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Gradient
result'

#if defined(ENABLE_OVERLOADING)
#endif

-- method Gradient::add_color_stop
-- method type : OrdinaryMethod
-- Args: [ Arg
--           { argCName = "gradient"
--           , argType =
--               TInterface Name { namespace = "Gtk" , name = "Gradient" }
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "a #GtkGradient" , sinceVersion = Nothing }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       , Arg
--           { argCName = "offset"
--           , argType = TBasicType TDouble
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "offset for the color stop"
--                 , sinceVersion = Nothing
--                 }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       , Arg
--           { argCName = "color"
--           , argType =
--               TInterface Name { namespace = "Gtk" , name = "SymbolicColor" }
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "color to use" , sinceVersion = Nothing }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       ]
-- Lengths: []
-- returnType: Nothing
-- throws : False
-- Skip return : False

foreign import ccall "gtk_gradient_add_color_stop" gtk_gradient_add_color_stop :: 
    Ptr Gradient ->                         -- gradient : TInterface (Name {namespace = "Gtk", name = "Gradient"})
    CDouble ->                              -- offset : TBasicType TDouble
    Ptr Gtk.SymbolicColor.SymbolicColor ->  -- color : TInterface (Name {namespace = "Gtk", name = "SymbolicColor"})
    IO ()

{-# DEPRECATED gradientAddColorStop ["(Since version 3.8)","t'GI.Gtk.Structs.Gradient.Gradient' is deprecated."] #-}
-- | Adds a stop color to /@gradient@/.
-- 
-- /Since: 3.0/
gradientAddColorStop ::
    (B.CallStack.HasCallStack, MonadIO m) =>
    Gradient
    -- ^ /@gradient@/: a t'GI.Gtk.Structs.Gradient.Gradient'
    -> Double
    -- ^ /@offset@/: offset for the color stop
    -> Gtk.SymbolicColor.SymbolicColor
    -- ^ /@color@/: color to use
    -> m ()
gradientAddColorStop :: forall (m :: * -> *).
(HasCallStack, MonadIO m) =>
Gradient -> Double -> SymbolicColor -> m ()
gradientAddColorStop Gradient
gradient Double
offset SymbolicColor
color = IO () -> m ()
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> m ()) -> IO () -> m ()
forall a b. (a -> b) -> a -> b
$ do
    Ptr Gradient
gradient' <- Gradient -> IO (Ptr Gradient)
forall a. (HasCallStack, ManagedPtrNewtype a) => a -> IO (Ptr a)
unsafeManagedPtrGetPtr Gradient
gradient
    let offset' :: CDouble
offset' = Double -> CDouble
forall a b. (Real a, Fractional b) => a -> b
realToFrac Double
offset
    Ptr SymbolicColor
color' <- SymbolicColor -> IO (Ptr SymbolicColor)
forall a. (HasCallStack, ManagedPtrNewtype a) => a -> IO (Ptr a)
unsafeManagedPtrGetPtr SymbolicColor
color
    Ptr Gradient -> CDouble -> Ptr SymbolicColor -> IO ()
gtk_gradient_add_color_stop Ptr Gradient
gradient' CDouble
offset' Ptr SymbolicColor
color'
    Gradient -> IO ()
forall a. ManagedPtrNewtype a => a -> IO ()
touchManagedPtr Gradient
gradient
    SymbolicColor -> IO ()
forall a. ManagedPtrNewtype a => a -> IO ()
touchManagedPtr SymbolicColor
color
    () -> IO ()
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return ()

#if defined(ENABLE_OVERLOADING)
data GradientAddColorStopMethodInfo
instance (signature ~ (Double -> Gtk.SymbolicColor.SymbolicColor -> m ()), MonadIO m) => O.OverloadedMethod GradientAddColorStopMethodInfo Gradient signature where
    overloadedMethod = gradientAddColorStop

instance O.OverloadedMethodInfo GradientAddColorStopMethodInfo Gradient where
    overloadedMethodInfo = P.Just (O.ResolvedSymbolInfo {
        O.resolvedSymbolName = "GI.Gtk.Structs.Gradient.gradientAddColorStop",
        O.resolvedSymbolURL = "https://hackage.haskell.org/package/gi-gtk-3.0.41/docs/GI-Gtk-Structs-Gradient.html#v:gradientAddColorStop"
        })


#endif

-- method Gradient::ref
-- method type : OrdinaryMethod
-- Args: [ Arg
--           { argCName = "gradient"
--           , argType =
--               TInterface Name { namespace = "Gtk" , name = "Gradient" }
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "a #GtkGradient" , sinceVersion = Nothing }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       ]
-- Lengths: []
-- returnType: Just (TInterface Name { namespace = "Gtk" , name = "Gradient" })
-- throws : False
-- Skip return : False

foreign import ccall "gtk_gradient_ref" gtk_gradient_ref :: 
    Ptr Gradient ->                         -- gradient : TInterface (Name {namespace = "Gtk", name = "Gradient"})
    IO (Ptr Gradient)

{-# DEPRECATED gradientRef ["(Since version 3.8)","t'GI.Gtk.Structs.Gradient.Gradient' is deprecated."] #-}
-- | Increases the reference count of /@gradient@/.
-- 
-- /Since: 3.0/
gradientRef ::
    (B.CallStack.HasCallStack, MonadIO m) =>
    Gradient
    -- ^ /@gradient@/: a t'GI.Gtk.Structs.Gradient.Gradient'
    -> m Gradient
    -- ^ __Returns:__ The same /@gradient@/
gradientRef :: forall (m :: * -> *).
(HasCallStack, MonadIO m) =>
Gradient -> m Gradient
gradientRef Gradient
gradient = IO Gradient -> m Gradient
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Gradient -> m Gradient) -> IO Gradient -> m Gradient
forall a b. (a -> b) -> a -> b
$ do
    Ptr Gradient
gradient' <- Gradient -> IO (Ptr Gradient)
forall a. (HasCallStack, ManagedPtrNewtype a) => a -> IO (Ptr a)
unsafeManagedPtrGetPtr Gradient
gradient
    Ptr Gradient
result <- Ptr Gradient -> IO (Ptr Gradient)
gtk_gradient_ref Ptr Gradient
gradient'
    Text -> Ptr Gradient -> IO ()
forall a. HasCallStack => Text -> Ptr a -> IO ()
checkUnexpectedReturnNULL Text
"gradientRef" Ptr Gradient
result
    Gradient
result' <- ((ManagedPtr Gradient -> Gradient) -> Ptr Gradient -> IO Gradient
forall a.
(HasCallStack, GBoxed a) =>
(ManagedPtr a -> a) -> Ptr a -> IO a
wrapBoxed ManagedPtr Gradient -> Gradient
Gradient) Ptr Gradient
result
    Gradient -> IO ()
forall a. ManagedPtrNewtype a => a -> IO ()
touchManagedPtr Gradient
gradient
    Gradient -> IO Gradient
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Gradient
result'

#if defined(ENABLE_OVERLOADING)
data GradientRefMethodInfo
instance (signature ~ (m Gradient), MonadIO m) => O.OverloadedMethod GradientRefMethodInfo Gradient signature where
    overloadedMethod = gradientRef

instance O.OverloadedMethodInfo GradientRefMethodInfo Gradient where
    overloadedMethodInfo = P.Just (O.ResolvedSymbolInfo {
        O.resolvedSymbolName = "GI.Gtk.Structs.Gradient.gradientRef",
        O.resolvedSymbolURL = "https://hackage.haskell.org/package/gi-gtk-3.0.41/docs/GI-Gtk-Structs-Gradient.html#v:gradientRef"
        })


#endif

-- method Gradient::resolve
-- method type : OrdinaryMethod
-- Args: [ Arg
--           { argCName = "gradient"
--           , argType =
--               TInterface Name { namespace = "Gtk" , name = "Gradient" }
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "a #GtkGradient" , sinceVersion = Nothing }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       , Arg
--           { argCName = "props"
--           , argType =
--               TInterface Name { namespace = "Gtk" , name = "StyleProperties" }
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText =
--                     Just "#GtkStyleProperties to use when resolving named colors"
--                 , sinceVersion = Nothing
--                 }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       , Arg
--           { argCName = "resolved_gradient"
--           , argType =
--               TInterface Name { namespace = "cairo" , name = "Pattern" }
--           , direction = DirectionOut
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "return location for the resolved pattern"
--                 , sinceVersion = Nothing
--                 }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferEverything
--           }
--       ]
-- Lengths: []
-- returnType: Just (TBasicType TBoolean)
-- throws : False
-- Skip return : False

foreign import ccall "gtk_gradient_resolve" gtk_gradient_resolve :: 
    Ptr Gradient ->                         -- gradient : TInterface (Name {namespace = "Gtk", name = "Gradient"})
    Ptr Gtk.StyleProperties.StyleProperties -> -- props : TInterface (Name {namespace = "Gtk", name = "StyleProperties"})
    Ptr (Ptr Cairo.Pattern.Pattern) ->      -- resolved_gradient : TInterface (Name {namespace = "cairo", name = "Pattern"})
    IO CInt

{-# DEPRECATED gradientResolve ["(Since version 3.8)","t'GI.Gtk.Structs.Gradient.Gradient' is deprecated."] #-}
-- | If /@gradient@/ is resolvable, /@resolvedGradient@/ will be filled in
-- with the resolved gradient as a cairo_pattern_t, and 'P.True' will
-- be returned. Generally, if /@gradient@/ can’t be resolved, it is
-- due to it being defined on top of a named color that doesn\'t
-- exist in /@props@/.
-- 
-- /Since: 3.0/
gradientResolve ::
    (B.CallStack.HasCallStack, MonadIO m, Gtk.StyleProperties.IsStyleProperties a) =>
    Gradient
    -- ^ /@gradient@/: a t'GI.Gtk.Structs.Gradient.Gradient'
    -> a
    -- ^ /@props@/: t'GI.Gtk.Objects.StyleProperties.StyleProperties' to use when resolving named colors
    -> m ((Bool, Cairo.Pattern.Pattern))
    -- ^ __Returns:__ 'P.True' if the gradient has been resolved
gradientResolve :: forall (m :: * -> *) a.
(HasCallStack, MonadIO m, IsStyleProperties a) =>
Gradient -> a -> m (Bool, Pattern)
gradientResolve Gradient
gradient a
props = IO (Bool, Pattern) -> m (Bool, Pattern)
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO (Bool, Pattern) -> m (Bool, Pattern))
-> IO (Bool, Pattern) -> m (Bool, Pattern)
forall a b. (a -> b) -> a -> b
$ do
    Ptr Gradient
gradient' <- Gradient -> IO (Ptr Gradient)
forall a. (HasCallStack, ManagedPtrNewtype a) => a -> IO (Ptr a)
unsafeManagedPtrGetPtr Gradient
gradient
    Ptr StyleProperties
props' <- a -> IO (Ptr StyleProperties)
forall a b. (HasCallStack, ManagedPtrNewtype a) => a -> IO (Ptr b)
unsafeManagedPtrCastPtr a
props
    Ptr (Ptr Pattern)
resolvedGradient <- IO (Ptr (Ptr Pattern))
forall a. Storable a => IO (Ptr a)
callocMem :: IO (Ptr (Ptr Cairo.Pattern.Pattern))
    CInt
result <- Ptr Gradient -> Ptr StyleProperties -> Ptr (Ptr Pattern) -> IO CInt
gtk_gradient_resolve Ptr Gradient
gradient' Ptr StyleProperties
props' Ptr (Ptr Pattern)
resolvedGradient
    let result' :: Bool
result' = (CInt -> CInt -> Bool
forall a. Eq a => a -> a -> Bool
/= CInt
0) CInt
result
    Ptr Pattern
resolvedGradient' <- Ptr (Ptr Pattern) -> IO (Ptr Pattern)
forall a. Storable a => Ptr a -> IO a
peek Ptr (Ptr Pattern)
resolvedGradient
    Pattern
resolvedGradient'' <- ((ManagedPtr Pattern -> Pattern) -> Ptr Pattern -> IO Pattern
forall a.
(HasCallStack, GBoxed a) =>
(ManagedPtr a -> a) -> Ptr a -> IO a
wrapBoxed ManagedPtr Pattern -> Pattern
Cairo.Pattern.Pattern) Ptr Pattern
resolvedGradient'
    Gradient -> IO ()
forall a. ManagedPtrNewtype a => a -> IO ()
touchManagedPtr Gradient
gradient
    a -> IO ()
forall a. ManagedPtrNewtype a => a -> IO ()
touchManagedPtr a
props
    Ptr (Ptr Pattern) -> IO ()
forall a. Ptr a -> IO ()
freeMem Ptr (Ptr Pattern)
resolvedGradient
    (Bool, Pattern) -> IO (Bool, Pattern)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (Bool
result', Pattern
resolvedGradient'')

#if defined(ENABLE_OVERLOADING)
data GradientResolveMethodInfo
instance (signature ~ (a -> m ((Bool, Cairo.Pattern.Pattern))), MonadIO m, Gtk.StyleProperties.IsStyleProperties a) => O.OverloadedMethod GradientResolveMethodInfo Gradient signature where
    overloadedMethod = gradientResolve

instance O.OverloadedMethodInfo GradientResolveMethodInfo Gradient where
    overloadedMethodInfo = P.Just (O.ResolvedSymbolInfo {
        O.resolvedSymbolName = "GI.Gtk.Structs.Gradient.gradientResolve",
        O.resolvedSymbolURL = "https://hackage.haskell.org/package/gi-gtk-3.0.41/docs/GI-Gtk-Structs-Gradient.html#v:gradientResolve"
        })


#endif

-- method Gradient::resolve_for_context
-- method type : OrdinaryMethod
-- Args: [ Arg
--           { argCName = "gradient"
--           , argType =
--               TInterface Name { namespace = "Gtk" , name = "Gradient" }
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation { rawDocText = Nothing , sinceVersion = Nothing }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       , Arg
--           { argCName = "context"
--           , argType =
--               TInterface Name { namespace = "Gtk" , name = "StyleContext" }
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation { rawDocText = Nothing , sinceVersion = Nothing }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       ]
-- Lengths: []
-- returnType: Just (TInterface Name { namespace = "cairo" , name = "Pattern" })
-- throws : False
-- Skip return : False

foreign import ccall "gtk_gradient_resolve_for_context" gtk_gradient_resolve_for_context :: 
    Ptr Gradient ->                         -- gradient : TInterface (Name {namespace = "Gtk", name = "Gradient"})
    Ptr Gtk.StyleContext.StyleContext ->    -- context : TInterface (Name {namespace = "Gtk", name = "StyleContext"})
    IO (Ptr Cairo.Pattern.Pattern)

-- | /No description available in the introspection data./
gradientResolveForContext ::
    (B.CallStack.HasCallStack, MonadIO m, Gtk.StyleContext.IsStyleContext a) =>
    Gradient
    -> a
    -> m Cairo.Pattern.Pattern
gradientResolveForContext :: forall (m :: * -> *) a.
(HasCallStack, MonadIO m, IsStyleContext a) =>
Gradient -> a -> m Pattern
gradientResolveForContext Gradient
gradient a
context = IO Pattern -> m Pattern
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Pattern -> m Pattern) -> IO Pattern -> m Pattern
forall a b. (a -> b) -> a -> b
$ do
    Ptr Gradient
gradient' <- Gradient -> IO (Ptr Gradient)
forall a. (HasCallStack, ManagedPtrNewtype a) => a -> IO (Ptr a)
unsafeManagedPtrGetPtr Gradient
gradient
    Ptr StyleContext
context' <- a -> IO (Ptr StyleContext)
forall a b. (HasCallStack, ManagedPtrNewtype a) => a -> IO (Ptr b)
unsafeManagedPtrCastPtr a
context
    Ptr Pattern
result <- Ptr Gradient -> Ptr StyleContext -> IO (Ptr Pattern)
gtk_gradient_resolve_for_context Ptr Gradient
gradient' Ptr StyleContext
context'
    Text -> Ptr Pattern -> IO ()
forall a. HasCallStack => Text -> Ptr a -> IO ()
checkUnexpectedReturnNULL Text
"gradientResolveForContext" Ptr Pattern
result
    Pattern
result' <- ((ManagedPtr Pattern -> Pattern) -> Ptr Pattern -> IO Pattern
forall a.
(HasCallStack, GBoxed a) =>
(ManagedPtr a -> a) -> Ptr a -> IO a
wrapBoxed ManagedPtr Pattern -> Pattern
Cairo.Pattern.Pattern) Ptr Pattern
result
    Gradient -> IO ()
forall a. ManagedPtrNewtype a => a -> IO ()
touchManagedPtr Gradient
gradient
    a -> IO ()
forall a. ManagedPtrNewtype a => a -> IO ()
touchManagedPtr a
context
    Pattern -> IO Pattern
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Pattern
result'

#if defined(ENABLE_OVERLOADING)
data GradientResolveForContextMethodInfo
instance (signature ~ (a -> m Cairo.Pattern.Pattern), MonadIO m, Gtk.StyleContext.IsStyleContext a) => O.OverloadedMethod GradientResolveForContextMethodInfo Gradient signature where
    overloadedMethod = gradientResolveForContext

instance O.OverloadedMethodInfo GradientResolveForContextMethodInfo Gradient where
    overloadedMethodInfo = P.Just (O.ResolvedSymbolInfo {
        O.resolvedSymbolName = "GI.Gtk.Structs.Gradient.gradientResolveForContext",
        O.resolvedSymbolURL = "https://hackage.haskell.org/package/gi-gtk-3.0.41/docs/GI-Gtk-Structs-Gradient.html#v:gradientResolveForContext"
        })


#endif

-- method Gradient::to_string
-- method type : OrdinaryMethod
-- Args: [ Arg
--           { argCName = "gradient"
--           , argType =
--               TInterface Name { namespace = "Gtk" , name = "Gradient" }
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "the gradient to print"
--                 , sinceVersion = Nothing
--                 }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       ]
-- Lengths: []
-- returnType: Just (TBasicType TUTF8)
-- throws : False
-- Skip return : False

foreign import ccall "gtk_gradient_to_string" gtk_gradient_to_string :: 
    Ptr Gradient ->                         -- gradient : TInterface (Name {namespace = "Gtk", name = "Gradient"})
    IO CString

{-# DEPRECATED gradientToString ["(Since version 3.8)","t'GI.Gtk.Structs.Gradient.Gradient' is deprecated."] #-}
-- | Creates a string representation for /@gradient@/ that is suitable
-- for using in GTK CSS files.
gradientToString ::
    (B.CallStack.HasCallStack, MonadIO m) =>
    Gradient
    -- ^ /@gradient@/: the gradient to print
    -> m T.Text
    -- ^ __Returns:__ A string representation for /@gradient@/
gradientToString :: forall (m :: * -> *).
(HasCallStack, MonadIO m) =>
Gradient -> m Text
gradientToString Gradient
gradient = IO Text -> m Text
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Text -> m Text) -> IO Text -> m Text
forall a b. (a -> b) -> a -> b
$ do
    Ptr Gradient
gradient' <- Gradient -> IO (Ptr Gradient)
forall a. (HasCallStack, ManagedPtrNewtype a) => a -> IO (Ptr a)
unsafeManagedPtrGetPtr Gradient
gradient
    CString
result <- Ptr Gradient -> IO CString
gtk_gradient_to_string Ptr Gradient
gradient'
    Text -> CString -> IO ()
forall a. HasCallStack => Text -> Ptr a -> IO ()
checkUnexpectedReturnNULL Text
"gradientToString" CString
result
    Text
result' <- HasCallStack => CString -> IO Text
CString -> IO Text
cstringToText CString
result
    CString -> IO ()
forall a. Ptr a -> IO ()
freeMem CString
result
    Gradient -> IO ()
forall a. ManagedPtrNewtype a => a -> IO ()
touchManagedPtr Gradient
gradient
    Text -> IO Text
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Text
result'

#if defined(ENABLE_OVERLOADING)
data GradientToStringMethodInfo
instance (signature ~ (m T.Text), MonadIO m) => O.OverloadedMethod GradientToStringMethodInfo Gradient signature where
    overloadedMethod = gradientToString

instance O.OverloadedMethodInfo GradientToStringMethodInfo Gradient where
    overloadedMethodInfo = P.Just (O.ResolvedSymbolInfo {
        O.resolvedSymbolName = "GI.Gtk.Structs.Gradient.gradientToString",
        O.resolvedSymbolURL = "https://hackage.haskell.org/package/gi-gtk-3.0.41/docs/GI-Gtk-Structs-Gradient.html#v:gradientToString"
        })


#endif

-- method Gradient::unref
-- method type : OrdinaryMethod
-- Args: [ Arg
--           { argCName = "gradient"
--           , argType =
--               TInterface Name { namespace = "Gtk" , name = "Gradient" }
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "a #GtkGradient" , sinceVersion = Nothing }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       ]
-- Lengths: []
-- returnType: Nothing
-- throws : False
-- Skip return : False

foreign import ccall "gtk_gradient_unref" gtk_gradient_unref :: 
    Ptr Gradient ->                         -- gradient : TInterface (Name {namespace = "Gtk", name = "Gradient"})
    IO ()

{-# DEPRECATED gradientUnref ["(Since version 3.8)","t'GI.Gtk.Structs.Gradient.Gradient' is deprecated."] #-}
-- | Decreases the reference count of /@gradient@/, freeing its memory
-- if the reference count reaches 0.
-- 
-- /Since: 3.0/
gradientUnref ::
    (B.CallStack.HasCallStack, MonadIO m) =>
    Gradient
    -- ^ /@gradient@/: a t'GI.Gtk.Structs.Gradient.Gradient'
    -> m ()
gradientUnref :: forall (m :: * -> *). (HasCallStack, MonadIO m) => Gradient -> m ()
gradientUnref Gradient
gradient = IO () -> m ()
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> m ()) -> IO () -> m ()
forall a b. (a -> b) -> a -> b
$ do
    Ptr Gradient
gradient' <- Gradient -> IO (Ptr Gradient)
forall a. (HasCallStack, ManagedPtrNewtype a) => a -> IO (Ptr a)
unsafeManagedPtrGetPtr Gradient
gradient
    Ptr Gradient -> IO ()
gtk_gradient_unref Ptr Gradient
gradient'
    Gradient -> IO ()
forall a. ManagedPtrNewtype a => a -> IO ()
touchManagedPtr Gradient
gradient
    () -> IO ()
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return ()

#if defined(ENABLE_OVERLOADING)
data GradientUnrefMethodInfo
instance (signature ~ (m ()), MonadIO m) => O.OverloadedMethod GradientUnrefMethodInfo Gradient signature where
    overloadedMethod = gradientUnref

instance O.OverloadedMethodInfo GradientUnrefMethodInfo Gradient where
    overloadedMethodInfo = P.Just (O.ResolvedSymbolInfo {
        O.resolvedSymbolName = "GI.Gtk.Structs.Gradient.gradientUnref",
        O.resolvedSymbolURL = "https://hackage.haskell.org/package/gi-gtk-3.0.41/docs/GI-Gtk-Structs-Gradient.html#v:gradientUnref"
        })


#endif

#if defined(ENABLE_OVERLOADING)
type family ResolveGradientMethod (t :: Symbol) (o :: DK.Type) :: DK.Type where
    ResolveGradientMethod "addColorStop" o = GradientAddColorStopMethodInfo
    ResolveGradientMethod "ref" o = GradientRefMethodInfo
    ResolveGradientMethod "resolve" o = GradientResolveMethodInfo
    ResolveGradientMethod "resolveForContext" o = GradientResolveForContextMethodInfo
    ResolveGradientMethod "toString" o = GradientToStringMethodInfo
    ResolveGradientMethod "unref" o = GradientUnrefMethodInfo
    ResolveGradientMethod l o = O.MethodResolutionFailed l o

instance (info ~ ResolveGradientMethod t Gradient, O.OverloadedMethod info Gradient p) => OL.IsLabel t (Gradient -> p) where
#if MIN_VERSION_base(4,10,0)
    fromLabel = O.overloadedMethod @info
#else
    fromLabel _ = O.overloadedMethod @info
#endif

#if MIN_VERSION_base(4,13,0)
instance (info ~ ResolveGradientMethod t Gradient, O.OverloadedMethod info Gradient p, R.HasField t Gradient p) => R.HasField t Gradient p where
    getField = O.overloadedMethod @info

#endif

instance (info ~ ResolveGradientMethod t Gradient, O.OverloadedMethodInfo info Gradient) => OL.IsLabel t (O.MethodProxy info Gradient) where
#if MIN_VERSION_base(4,10,0)
    fromLabel = O.MethodProxy
#else
    fromLabel _ = O.MethodProxy
#endif

#endif