Safe Haskell	None
Language	Haskell2010

GI.Gtk.Objects.StyleContext

Description

This is a backwards-compatibility module re-exporting the contents of the GI.Gtk.Objects.StyleContext module in the gi-gtk4 package.

The link below will take you to the relevant entry in the gi-gtk4 documentation.

Documentation

newtype StyleContext #

Constructors

StyleContext (ManagedPtr StyleContext)

Instances

Instances details

Eq StyleContext
Instance details Defined in GI.Gtk.Objects.StyleContext Methods (==) :: StyleContext -> StyleContext -> Bool (/=) :: StyleContext -> StyleContext -> Bool
GObject StyleContext
Instance details Defined in GI.Gtk.Objects.StyleContext
ManagedPtrNewtype StyleContext
Instance details Defined in GI.Gtk.Objects.StyleContext Methods toManagedPtr :: StyleContext -> ManagedPtr StyleContext #
TypedObject StyleContext
Instance details Defined in GI.Gtk.Objects.StyleContext Methods glibType :: IO GType #
HasParentTypes StyleContext
Instance details Defined in GI.Gtk.Objects.StyleContext
HasAttributeList StyleContext
Instance details Defined in GI.Gtk.Objects.StyleContext
(info ~ ResolveStyleContextMethod t StyleContext, OverloadedMethod info StyleContext p, HasField t StyleContext p) => HasField (t :: Symbol) StyleContext p
Instance details Defined in GI.Gtk.Objects.StyleContext Methods getField :: StyleContext -> p
(info ~ ResolveStyleContextMethod t StyleContext, OverloadedMethodInfo info StyleContext) => IsLabel t (MethodProxy info StyleContext)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods fromLabel :: MethodProxy info StyleContext
(info ~ ResolveStyleContextMethod t StyleContext, OverloadedMethod info StyleContext p) => IsLabel t (StyleContext -> p)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods fromLabel :: StyleContext -> p
IsGValue (Maybe StyleContext)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods gvalueGType_ :: IO GType # gvalueSet_ :: Ptr GValue -> Maybe StyleContext -> IO () # gvalueGet_ :: Ptr GValue -> IO (Maybe StyleContext) #
type AttributeList StyleContext
Instance details Defined in GI.Gtk.Objects.StyleContext type AttributeList StyleContext = StyleContextAttributeList
type ParentTypes StyleContext
Instance details Defined in GI.Gtk.Objects.StyleContext type ParentTypes StyleContext = '[Object]
type SignalList StyleContext
Instance details Defined in GI.Gtk.Objects.StyleContext type SignalList StyleContext = StyleContextSignalList

class (GObject o, IsDescendantOf StyleContext o) => IsStyleContext o #

Instances

Instances details

(GObject o, IsDescendantOf StyleContext o) => IsStyleContext o
Instance details Defined in GI.Gtk.Objects.StyleContext

type family ResolveStyleContextMethod (t :: Symbol) o where ... #

Equations

ResolveStyleContextMethod "addClass" o = StyleContextAddClassMethodInfo
ResolveStyleContextMethod "addProvider" o = StyleContextAddProviderMethodInfo
ResolveStyleContextMethod "bindProperty" o = ObjectBindPropertyMethodInfo
ResolveStyleContextMethod "bindPropertyFull" o = ObjectBindPropertyFullMethodInfo
ResolveStyleContextMethod "forceFloating" o = ObjectForceFloatingMethodInfo
ResolveStyleContextMethod "freezeNotify" o = ObjectFreezeNotifyMethodInfo
ResolveStyleContextMethod "getv" o = ObjectGetvMethodInfo
ResolveStyleContextMethod "hasClass" o = StyleContextHasClassMethodInfo
ResolveStyleContextMethod "isFloating" o = ObjectIsFloatingMethodInfo
ResolveStyleContextMethod "lookupColor" o = StyleContextLookupColorMethodInfo
ResolveStyleContextMethod "notify" o = ObjectNotifyMethodInfo
ResolveStyleContextMethod "notifyByPspec" o = ObjectNotifyByPspecMethodInfo
ResolveStyleContextMethod "ref" o = ObjectRefMethodInfo
ResolveStyleContextMethod "refSink" o = ObjectRefSinkMethodInfo
ResolveStyleContextMethod "removeClass" o = StyleContextRemoveClassMethodInfo
ResolveStyleContextMethod "removeProvider" o = StyleContextRemoveProviderMethodInfo
ResolveStyleContextMethod "restore" o = StyleContextRestoreMethodInfo
ResolveStyleContextMethod "runDispose" o = ObjectRunDisposeMethodInfo
ResolveStyleContextMethod "save" o = StyleContextSaveMethodInfo
ResolveStyleContextMethod "stealData" o = ObjectStealDataMethodInfo
ResolveStyleContextMethod "stealQdata" o = ObjectStealQdataMethodInfo
ResolveStyleContextMethod "thawNotify" o = ObjectThawNotifyMethodInfo
ResolveStyleContextMethod "toString" o = StyleContextToStringMethodInfo
ResolveStyleContextMethod "unref" o = ObjectUnrefMethodInfo
ResolveStyleContextMethod "watchClosure" o = ObjectWatchClosureMethodInfo
ResolveStyleContextMethod "getBorder" o = StyleContextGetBorderMethodInfo
ResolveStyleContextMethod "getColor" o = StyleContextGetColorMethodInfo
ResolveStyleContextMethod "getData" o = ObjectGetDataMethodInfo
ResolveStyleContextMethod "getDisplay" o = StyleContextGetDisplayMethodInfo
ResolveStyleContextMethod "getMargin" o = StyleContextGetMarginMethodInfo
ResolveStyleContextMethod "getPadding" o = StyleContextGetPaddingMethodInfo
ResolveStyleContextMethod "getProperty" o = ObjectGetPropertyMethodInfo
ResolveStyleContextMethod "getQdata" o = ObjectGetQdataMethodInfo
ResolveStyleContextMethod "getScale" o = StyleContextGetScaleMethodInfo
ResolveStyleContextMethod "getState" o = StyleContextGetStateMethodInfo
ResolveStyleContextMethod "setData" o = ObjectSetDataMethodInfo
ResolveStyleContextMethod "setDataFull" o = ObjectSetDataFullMethodInfo
ResolveStyleContextMethod "setDisplay" o = StyleContextSetDisplayMethodInfo
ResolveStyleContextMethod "setProperty" o = ObjectSetPropertyMethodInfo
ResolveStyleContextMethod "setScale" o = StyleContextSetScaleMethodInfo
ResolveStyleContextMethod "setState" o = StyleContextSetStateMethodInfo
ResolveStyleContextMethod l o = MethodResolutionFailed l o :: Type

data StyleContextAddClassMethodInfo #

Instances

Instances details

(signature ~ (Text -> m ()), MonadIO m, IsStyleContext a) => OverloadedMethod StyleContextAddClassMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextAddClassMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

data StyleContextAddProviderMethodInfo #

Instances

Instances details

(signature ~ (b -> Word32 -> m ()), MonadIO m, IsStyleContext a, IsStyleProvider b) => OverloadedMethod StyleContextAddProviderMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextAddProviderMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

data StyleContextDisplayPropertyInfo #

Instances

Instances details

AttrInfo StyleContextDisplayPropertyInfo

Instance details

Defined in GI.Gtk.Objects.StyleContext

Associated Types

type AttrAllowedOps StyleContextDisplayPropertyInfo
Instance details Defined in GI.Gtk.Objects.StyleContext type AttrAllowedOps StyleContextDisplayPropertyInfo = '['AttrSet, 'AttrConstruct, 'AttrGet]
type AttrBaseTypeConstraint StyleContextDisplayPropertyInfo
Instance details Defined in GI.Gtk.Objects.StyleContext type AttrBaseTypeConstraint StyleContextDisplayPropertyInfo = IsStyleContext
type AttrGetType StyleContextDisplayPropertyInfo
Instance details Defined in GI.Gtk.Objects.StyleContext type AttrGetType StyleContextDisplayPropertyInfo = Display
type AttrSetTypeConstraint StyleContextDisplayPropertyInfo
Instance details Defined in GI.Gtk.Objects.StyleContext type AttrSetTypeConstraint StyleContextDisplayPropertyInfo = IsDisplay
type AttrTransferTypeConstraint StyleContextDisplayPropertyInfo
Instance details Defined in GI.Gtk.Objects.StyleContext type AttrTransferTypeConstraint StyleContextDisplayPropertyInfo = IsDisplay
type AttrTransferType StyleContextDisplayPropertyInfo
Instance details Defined in GI.Gtk.Objects.StyleContext type AttrTransferType StyleContextDisplayPropertyInfo = Display
type AttrLabel StyleContextDisplayPropertyInfo
Instance details Defined in GI.Gtk.Objects.StyleContext type AttrLabel StyleContextDisplayPropertyInfo = "display"
type AttrOrigin StyleContextDisplayPropertyInfo
Instance details Defined in GI.Gtk.Objects.StyleContext type AttrOrigin StyleContextDisplayPropertyInfo = StyleContext

Methods

attrGet :: AttrBaseTypeConstraint StyleContextDisplayPropertyInfo o => o -> IO (AttrGetType StyleContextDisplayPropertyInfo)

attrSet :: (AttrBaseTypeConstraint StyleContextDisplayPropertyInfo o, AttrSetTypeConstraint StyleContextDisplayPropertyInfo b) => o -> b -> IO ()

attrClear :: AttrBaseTypeConstraint StyleContextDisplayPropertyInfo o => o -> IO ()

attrConstruct :: (AttrBaseTypeConstraint StyleContextDisplayPropertyInfo o, AttrSetTypeConstraint StyleContextDisplayPropertyInfo b) => b -> IO (GValueConstruct o)

attrTransfer :: (AttrBaseTypeConstraint StyleContextDisplayPropertyInfo o, AttrTransferTypeConstraint StyleContextDisplayPropertyInfo b) => Proxy o -> b -> IO (AttrTransferType StyleContextDisplayPropertyInfo)

attrPut :: AttrBaseTypeConstraint StyleContextDisplayPropertyInfo o => o -> AttrGetType StyleContextDisplayPropertyInfo -> IO ()

dbgAttrInfo :: Maybe ResolvedSymbolInfo

type AttrAllowedOps StyleContextDisplayPropertyInfo

Instance details

Defined in GI.Gtk.Objects.StyleContext

type AttrAllowedOps StyleContextDisplayPropertyInfo = '['AttrSet, 'AttrConstruct, 'AttrGet]

type AttrBaseTypeConstraint StyleContextDisplayPropertyInfo

Instance details

Defined in GI.Gtk.Objects.StyleContext

type AttrBaseTypeConstraint StyleContextDisplayPropertyInfo = IsStyleContext

type AttrGetType StyleContextDisplayPropertyInfo

Instance details

Defined in GI.Gtk.Objects.StyleContext

type AttrGetType StyleContextDisplayPropertyInfo = Display

type AttrLabel StyleContextDisplayPropertyInfo

Instance details

Defined in GI.Gtk.Objects.StyleContext

type AttrLabel StyleContextDisplayPropertyInfo = "display"

type AttrOrigin StyleContextDisplayPropertyInfo

Instance details

Defined in GI.Gtk.Objects.StyleContext

type AttrOrigin StyleContextDisplayPropertyInfo = StyleContext

type AttrSetTypeConstraint StyleContextDisplayPropertyInfo

Instance details

Defined in GI.Gtk.Objects.StyleContext

type AttrSetTypeConstraint StyleContextDisplayPropertyInfo = IsDisplay

type AttrTransferType StyleContextDisplayPropertyInfo

Instance details

Defined in GI.Gtk.Objects.StyleContext

type AttrTransferType StyleContextDisplayPropertyInfo = Display

type AttrTransferTypeConstraint StyleContextDisplayPropertyInfo

Instance details

Defined in GI.Gtk.Objects.StyleContext

type AttrTransferTypeConstraint StyleContextDisplayPropertyInfo = IsDisplay

data StyleContextGetBorderMethodInfo #

Instances

Instances details

(signature ~ m Border, MonadIO m, IsStyleContext a) => OverloadedMethod StyleContextGetBorderMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextGetBorderMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

data StyleContextGetColorMethodInfo #

Instances

Instances details

(signature ~ m RGBA, MonadIO m, IsStyleContext a) => OverloadedMethod StyleContextGetColorMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextGetColorMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

data StyleContextGetDisplayMethodInfo #

Instances

Instances details

(signature ~ m Display, MonadIO m, IsStyleContext a) => OverloadedMethod StyleContextGetDisplayMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextGetDisplayMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

data StyleContextGetMarginMethodInfo #

Instances

Instances details

(signature ~ m Border, MonadIO m, IsStyleContext a) => OverloadedMethod StyleContextGetMarginMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextGetMarginMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

data StyleContextGetPaddingMethodInfo #

Instances

Instances details

(signature ~ m Border, MonadIO m, IsStyleContext a) => OverloadedMethod StyleContextGetPaddingMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextGetPaddingMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

data StyleContextGetScaleMethodInfo #

Instances

Instances details

(signature ~ m Int32, MonadIO m, IsStyleContext a) => OverloadedMethod StyleContextGetScaleMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextGetScaleMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

data StyleContextGetStateMethodInfo #

Instances

Instances details

(signature ~ m [StateFlags], MonadIO m, IsStyleContext a) => OverloadedMethod StyleContextGetStateMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextGetStateMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

data StyleContextHasClassMethodInfo #

Instances

Instances details

(signature ~ (Text -> m Bool), MonadIO m, IsStyleContext a) => OverloadedMethod StyleContextHasClassMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextHasClassMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

data StyleContextLookupColorMethodInfo #

Instances

Instances details

(signature ~ (Text -> m (Bool, RGBA)), MonadIO m, IsStyleContext a) => OverloadedMethod StyleContextLookupColorMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextLookupColorMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

data StyleContextRemoveClassMethodInfo #

Instances

Instances details

(signature ~ (Text -> m ()), MonadIO m, IsStyleContext a) => OverloadedMethod StyleContextRemoveClassMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextRemoveClassMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

data StyleContextRemoveProviderMethodInfo #

Instances

Instances details

(signature ~ (b -> m ()), MonadIO m, IsStyleContext a, IsStyleProvider b) => OverloadedMethod StyleContextRemoveProviderMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextRemoveProviderMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

data StyleContextRestoreMethodInfo #

Instances

Instances details

(signature ~ m (), MonadIO m, IsStyleContext a) => OverloadedMethod StyleContextRestoreMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextRestoreMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

data StyleContextSaveMethodInfo #

Instances

Instances details

(signature ~ m (), MonadIO m, IsStyleContext a) => OverloadedMethod StyleContextSaveMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextSaveMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

data StyleContextSetDisplayMethodInfo #

Instances

Instances details

(signature ~ (b -> m ()), MonadIO m, IsStyleContext a, IsDisplay b) => OverloadedMethod StyleContextSetDisplayMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextSetDisplayMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

data StyleContextSetScaleMethodInfo #

Instances

Instances details

(signature ~ (Int32 -> m ()), MonadIO m, IsStyleContext a) => OverloadedMethod StyleContextSetScaleMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextSetScaleMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

data StyleContextSetStateMethodInfo #

Instances

Instances details

(signature ~ ([StateFlags] -> m ()), MonadIO m, IsStyleContext a) => OverloadedMethod StyleContextSetStateMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextSetStateMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

data StyleContextToStringMethodInfo #

Instances

Instances details

(signature ~ ([StyleContextPrintFlags] -> m Text), MonadIO m, IsStyleContext a) => OverloadedMethod StyleContextToStringMethodInfo a signature
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethod :: a -> signature
OverloadedMethodInfo StyleContextToStringMethodInfo (a :: Type)
Instance details Defined in GI.Gtk.Objects.StyleContext Methods overloadedMethodInfo :: Maybe ResolvedSymbolInfo

constructStyleContextDisplay :: (IsStyleContext o, MonadIO m, IsDisplay a) => a -> m (GValueConstruct o) #

getStyleContextDisplay :: (MonadIO m, IsStyleContext o) => o -> m Display #

setStyleContextDisplay :: (MonadIO m, IsStyleContext o, IsDisplay a) => o -> a -> m () #

styleContextAddClass :: (HasCallStack, MonadIO m, IsStyleContext a) => a -> Text -> m () #

styleContextAddProvider :: (HasCallStack, MonadIO m, IsStyleContext a, IsStyleProvider b) => a -> b -> Word32 -> m () #

styleContextAddProviderForDisplay :: (HasCallStack, MonadIO m, IsDisplay a, IsStyleProvider b) => a -> b -> Word32 -> m () #

styleContextDisplay :: AttrLabelProxy "display" #

styleContextGetBorder :: (HasCallStack, MonadIO m, IsStyleContext a) => a -> m Border #

styleContextGetColor :: (HasCallStack, MonadIO m, IsStyleContext a) => a -> m RGBA #

styleContextGetDisplay :: (HasCallStack, MonadIO m, IsStyleContext a) => a -> m Display #

styleContextGetMargin :: (HasCallStack, MonadIO m, IsStyleContext a) => a -> m Border #

styleContextGetPadding :: (HasCallStack, MonadIO m, IsStyleContext a) => a -> m Border #

styleContextGetScale :: (HasCallStack, MonadIO m, IsStyleContext a) => a -> m Int32 #

styleContextGetState :: (HasCallStack, MonadIO m, IsStyleContext a) => a -> m [StateFlags] #

styleContextHasClass :: (HasCallStack, MonadIO m, IsStyleContext a) => a -> Text -> m Bool #

styleContextLookupColor :: (HasCallStack, MonadIO m, IsStyleContext a) => a -> Text -> m (Bool, RGBA) #

styleContextRemoveClass :: (HasCallStack, MonadIO m, IsStyleContext a) => a -> Text -> m () #

styleContextRemoveProvider :: (HasCallStack, MonadIO m, IsStyleContext a, IsStyleProvider b) => a -> b -> m () #

styleContextRemoveProviderForDisplay :: (HasCallStack, MonadIO m, IsDisplay a, IsStyleProvider b) => a -> b -> m () #

styleContextRestore :: (HasCallStack, MonadIO m, IsStyleContext a) => a -> m () #

styleContextSave :: (HasCallStack, MonadIO m, IsStyleContext a) => a -> m () #

styleContextSetDisplay :: (HasCallStack, MonadIO m, IsStyleContext a, IsDisplay b) => a -> b -> m () #

styleContextSetScale :: (HasCallStack, MonadIO m, IsStyleContext a) => a -> Int32 -> m () #

styleContextSetState :: (HasCallStack, MonadIO m, IsStyleContext a) => a -> [StateFlags] -> m () #

styleContextToString :: (HasCallStack, MonadIO m, IsStyleContext a) => a -> [StyleContextPrintFlags] -> m Text #

toStyleContext :: (MonadIO m, IsStyleContext o) => o -> m StyleContext #