GI.GObject.Structs.TypeInterface

An opaque structure used as the base of all interface types.

Exported types

newtype TypeInterface

Memory-managed wrapper type.

Constructors

TypeInterface (ManagedPtr TypeInterface)

Instances

Eq TypeInterface

Defined in GI.GObject.Structs.TypeInterface

Methods

(==) :: TypeInterface -> TypeInterface -> Bool

(/=) :: TypeInterface -> TypeInterface -> Bool

BoxedPtr TypeInterface

Defined in GI.GObject.Structs.TypeInterface

Methods

boxedPtrCopy :: TypeInterface -> IO TypeInterface

boxedPtrFree :: TypeInterface -> IO ()

CallocPtr TypeInterface

Defined in GI.GObject.Structs.TypeInterface

Methods

boxedPtrCalloc :: IO (Ptr TypeInterface)

ManagedPtrNewtype TypeInterface

Defined in GI.GObject.Structs.TypeInterface

Methods

toManagedPtr :: TypeInterface -> ManagedPtr TypeInterface

tag ~ 'AttrSet => Constructible TypeInterface tag

Defined in GI.GObject.Structs.TypeInterface

Methods

new :: MonadIO m => (ManagedPtr TypeInterface -> TypeInterface) -> [AttrOp TypeInterface tag] -> m TypeInterface

newZeroTypeInterface :: MonadIO m => m TypeInterface

Construct a TypeInterface struct initialized to zero.

Methods

Click to display all available methods, including inherited ones

Methods

peekParent.

Getters

None.

Setters

None.

addPrerequisite

typeInterfaceAddPrerequisite

Arguments

:: (HasCallStack, MonadIO m)

=> GType

interfaceType: GType value of an interface type

-> GType

prerequisiteType: GType value of an interface or instantiatable type

-> m ()

Adds prerequisiteType to the list of prerequisites of interfaceType. This means that any type implementing interfaceType must also implement prerequisiteType. Prerequisites can be thought of as an alternative to interface derivation (which GType doesn't support). An interface can have at most one instantiatable prerequisite type.

getPlugin

typeInterfaceGetPlugin

Arguments

:: (HasCallStack, MonadIO m)

=> GType

instanceType: GType of an instantiatable type

-> GType

interfaceType: GType of an interface type

-> m TypePlugin

Returns: the TypePlugin for the dynamic interface interfaceType of instanceType

Returns the TypePlugin structure for the dynamic interface interfaceType which has been added to instanceType, or Nothing if interfaceType has not been added to instanceType or does not have a TypePlugin structure. See typeAddInterfaceDynamic.

instantiatablePrerequisite

typeInterfaceInstantiatablePrerequisite

Arguments

:: (HasCallStack, MonadIO m)

=> GType

interfaceType: an interface type

-> m GType

Returns: the instantiatable prerequisite type or G_TYPE_INVALID if none

Returns the most specific instantiatable prerequisite of an interface type. If the interface type has no instantiatable prerequisite, G_TYPE_INVALID is returned.

See typeInterfaceAddPrerequisite for more information about prerequisites.

Since: 2.68

peek

typeInterfacePeek

Arguments

:: (HasCallStack, MonadIO m)

=> TypeClass

instanceClass: a TypeClass structure

-> GType

ifaceType: an interface ID which this class conforms to

-> m TypeInterface

Returns: the TypeInterface structure of ifaceType if implemented by instanceClass, Nothing otherwise

Returns the TypeInterface structure of an interface to which the passed in class conforms.

peekParent

typeInterfacePeekParent

Arguments

:: (HasCallStack, MonadIO m)

=> TypeInterface

gIface: a TypeInterface structure

-> m TypeInterface

Returns: the corresponding TypeInterface structure of the parent type of the instance type to which gIface belongs, or Nothing if the parent type doesn't conform to the interface

Returns the corresponding TypeInterface structure of the parent type of the instance type to which gIface belongs. This is useful when deriving the implementation of an interface from the parent type and then possibly overriding some methods.

prerequisites

typeInterfacePrerequisites

Arguments

:: (HasCallStack, MonadIO m)

=> GType

interfaceType: an interface type

-> m [GType]

Returns: a newly-allocated zero-terminated array of GType containing the prerequisites of interfaceType

Returns the prerequisites of an interfaces type.

Since: 2.2