MFnEnumAttribute Class Reference

Enumerated attribute function set. More...

#include <MFnEnumAttribute.h>

Inheritance diagram for MFnEnumAttribute:

Public Member Functions
virtual MFn::Type	type () const
	Function set type. More...
virtual	~MFnEnumAttribute ()
	Destructor.
	MFnEnumAttribute ()
	Default constructor.
	MFnEnumAttribute (MObject &object, MStatus *ReturnStatus=NULL)
	Constructor. More...
MObject	create (const MString &fullName, const MString &briefName, short defaultValue=0, MStatus *ReturnStatus=NULL)
	Creates an enumerated attribute object. More...
MStatus	addField (const MString &fieldString, short index)
	Add a field (a string/index pair) to the enumeration. More...
MString	fieldName (short index, MStatus *ReturnStatus=NULL) const
	Retrieve the string associated with a given index. More...
short	fieldIndex (const MString &fieldString, MStatus *ReturnStatus=NULL) const
	Retrieve the index associated with a given string. More...
MStatus	getMin (short &minValue) const
	Return the minimum value for this attribute. More...
MStatus	getMax (short &maxValue) const
	Return the maximum value for this attribute. More...
MStatus	setDefault (short index)
	Set a new default value for this enum attribute. More...
MStatus	setDefault (const MString &fieldString)
	Set a new default value for this enum attribute. More...
MStatus	getDefault (short &index) const
	Get the default value for the enum attribute. More...
MString	defaultValue (MStatus *ReturnStatus=NULL) const
	Get the default value for the enum attribute. More...
	MFnEnumAttribute (const MObject &object, MStatus *ReturnStatus=NULL)
	Constructor. More...
MStatus	getDefault (MString &fieldString) const
	NO SCRIPT SUPPORT. More...
Public Member Functions inherited from MFnAttribute
virtual	~MFnAttribute ()
	Destructor.
	MFnAttribute ()
	Default constructor.
	MFnAttribute (MObject &object, MStatus *ReturnStatus=NULL)
	Constructor. More...
bool	isReadable (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute is readable. More...
bool	isWritable (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute is writable. More...
bool	isConnectable (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute accepts dependency graph connections. More...
bool	isStorable (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute is to be stored when the node is saved to a file. More...
bool	isCached (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute is cached locally in the node's data block. More...
bool	isArray (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute supports an array of data. More...
bool	indexMatters (MStatus *ReturnStatus=NULL) const
	Determines whether the user must specify an index when connecting to this attribute, or whether the next available index can be used. More...
bool	isKeyable (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute is keyable. More...
bool	isChannelBoxFlagSet (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute has its channel box flag set. More...
bool	isHidden (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute is to hidden from the UI. More...
bool	isUsedAsColor (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute is to be presented as a color in the UI. More...
bool	isIndeterminant (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute is indeterminant. More...
bool	isRenderSource (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute is a render source. More...
bool	isDynamic (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute is a dynamic attribute. More...
bool	isExtension (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute is an extension attribute. More...
bool	isWorldSpace (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute is worldspace. More...
bool	isAffectsWorldSpace (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute affects worldspace. More...
bool	isUsedAsFilename (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute is to be used as a filename. More...
bool	affectsAppearance (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute affects the appearance of the object when rendering in the viewport. More...
bool	isProxyAttribute (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute is a proxy attribute. More...
DisconnectBehavior	disconnectBehavior (MStatus *ReturnStatus=NULL) const
	Returns the behavior of this attribute when it is disconnected. More...
bool	usesArrayDataBuilder (MStatus *ReturnStatus=NULL) const
	Returns true if this attribute uses an array data builder. More...
bool	internal (MStatus *ReturnStatus=NULL) const
	Returns true if a node has internal member data representing this attribute. More...
MStatus	setReadable (bool state)
	Sets whether this attribute should be readable. More...
MStatus	setWritable (bool state)
	Sets whether this attribute should be writable. More...
MStatus	setConnectable (bool state)
	Sets whether this attribute should allow dependency graph connections. More...
MStatus	setStorable (bool state)
	Sets whether this attribute should be storable. More...
MStatus	setCached (bool state)
	Sets whether the data for this attribute is cached locally in the node's data block. More...
MStatus	setArray (bool state)
	Sets whether this attribute should have an array of data. More...
MStatus	setIndexMatters (bool state)
	If the attribute is an array, then this method specifies whether to force the user to specify an index when connecting to this attribute, or to use the next available index. More...
MStatus	setKeyable (bool state)
	Sets whether this attribute should accept keyframe data. More...
MStatus	setChannelBox (bool state)
	Sets whether this attribute should appear in the channel box when the node is selected. More...
MStatus	setHidden (bool state)
	Sets whether this attribute should be hidden from the UI. More...
MStatus	setUsedAsColor (bool state)
	Sets whether this attribute should be presented as a color in the UI. More...
MStatus	setIndeterminant (bool state)
	Sets whether this attribute is indeterminant. More...
MStatus	setRenderSource (bool state)
	Sets whether this attribute should be used as a render source attribute. More...
MStatus	setWorldSpace (bool state)
	Sets whether this attribute should be treated as worldspace. More...
MStatus	setAffectsWorldSpace (bool state)
	Sets whether this attribute should affect worldspace. More...
MStatus	setUsedAsFilename (bool state)
	Sets whether this attribute should be presented as a filename in the UI. More...
MStatus	setAffectsAppearance (bool state)
	Sets whether this attribute affects the appearance of the object when rendering in the viewport. More...
MStatus	setProxyAttribute (bool state)
	Sets whether this attribute is a proxy attribute. More...
MStatus	setDisconnectBehavior (DisconnectBehavior behavior)
	Sets the disconnection behavior for this attribute. More...
MStatus	setUsesArrayDataBuilder (bool state)
	Sets whether this attribute uses an array data builder. More...
MStatus	setInternal (bool state)
	The function controls an attribute's data storage. More...
MStatus	setNiceNameOverride (const MString &localizedName)
	Sets the localized string which should be used for this attribute in the UI. More...
bool	acceptsAttribute (const MFnAttribute &attr, MStatus *ReturnStatus=NULL) const
	Returns true if this attribute can accept a connection with the given attribute. More...
bool	accepts (MFnData::Type type, MStatus *ReturnStatus=NULL) const
	Returns true if this attribute can accept a connection of the given type. More...
bool	accepts (const MTypeId &id, MStatus *ReturnStatus=NULL) const
	Returns true if this attribute can accept a connection of the given type. More...
MObject	parent (MStatus *ReturnStatus=NULL) const
	Get the parent of this attribute, if it has one. More...
MString	name (MStatus *ReturnStatus=NULL) const
	Returns the long name of the attribute. More...
MString	shortName (MStatus *ReturnStatus=NULL) const
	Returns the short name of the attribute. More...
MString	getAddAttrCmd (bool useLongName=false, MStatus *status=NULL) const
	Returns a string containing the addAttr command which would be required to recreate the attribute on a node. More...
MStatus	addToCategory (const MString &category)
	Add the attribute to the named category. More...
MStatus	removeFromCategory (const MString &category)
	Remove the attribute from the named category. More...
bool	hasCategory (const MString &category) const
	Check to see if the attribute belongs to the named category. More...
MStatus	getCategories (MStringArray &ReturnStatus) const
	Get all of the categories to which this attribute belongs. More...
	MFnAttribute (const MObject &object, MStatus *ReturnStatus=NULL)
	NO SCRIPT SUPPORT. More...
Public Member Functions inherited from MFnBase
virtual	~MFnBase ()
	Class Destructor. More...
bool	hasObj (MFn::Type) const
	Determines whether or not the Function Set is compatible with the specified Maya Object within the API RTTI system. More...
bool	hasObj (const MObject &) const
	Determines whether or not the Function Set is compatible with the specified Maya Object within the API RTTI system. More...
MObject	object (MStatus *ReturnStatus=nullptr) const
	Returns the MObject that is attached to the Function Set. More...
virtual MStatus	setObject (MObject &object)
	Attaches the Function Set to the specified Maya Object. More...
virtual MStatus	setObject (const MObject &object)
	NO SCRIPT SUPPORT. More...

Static Public Member Functions
static const char *	className ()
	Returns the name of this class. More...
Static Public Member Functions inherited from MFnAttribute
static const char *	className ()
	Returns the name of this class. More...
Static Public Member Functions inherited from MFnBase
static const char *	className ()
	Returns the name of this class. More...
static const char *	typeString (MFn::Type)
	Introduced in 2020.0 More...
static bool	isValid (MFn::Type)
	Introduced in 2020.0 More...

Additional Inherited Members
Public Types inherited from MFnAttribute
enum	DisconnectBehavior { kDelete, kReset, kNothing }
	Attribute behaviour on disconnect. More...

Detailed Description

Enumerated attribute function set.

Function set for enumerated attributes. These attributes accept fields as input. Each field consists of a short and its associated string, which is a descriptive name for the field.

Examples:

AbcImport/AlembicNode.cpp, apiMeshShape/apiMeshCreator.cpp, buildRotationNode/buildRotationNode.cpp, cameraSetSubclass/exCameraSet.cpp, dx11Shader/dx11Shader.cpp, glslShader/GLSLShader.cpp, MayaPluginForSpreticle/spReticleLoc.cpp, meshOpCmd/meshOpNode.cpp, MetadataSample/tweakMetadataNode.cpp, transformDrawNode/transformDrawNode.cpp, and uiDrawManager/uiDrawManager.cpp.

Constructor & Destructor Documentation

MFnEnumAttribute	(	MObject &	object,
		MStatus *	ReturnStatus = NULL
	)

Constructor.

Class constructor that initializes the function set to the given MObject.

Parameters

[in]	object	The MObject to attach the function set to
[out]	ReturnStatus	the return status

Status Codes:

• MS::kSuccess if the function set is successfully attached
• MS::kInvalidParameter if the MObject does not represent a valid Maya object or if the function set is not allowed to attach to this MObject

MFnEnumAttribute	(	const MObject &	object,
		MStatus *	ReturnStatus = NULL
	)

Constructor.

Class constructor that initializes the function set to the given MObject.

Parameters

[in]	object	The MObject to attach the function set to
[out]	ReturnStatus	the return status

Status Codes:

• MS::kSuccess if the function set is successfully attached
• MS::kInvalidParameter if the MObject does not represent a valid Maya object or if the function set is not allowed to attach to this MObject

Member Function Documentation

MFn::Type type ( ) const

virtual

Function set type.

Return the class type : MFn::kEnumAttribute.

Returns

the class type.

Reimplemented from MFnAttribute.

OPENMAYA_MAJOR_NAMESPACE_OPEN const char * className ( )

static

Returns the name of this class.

Return the class name : "MFnEnumAttribute".

Returns

Name of this class.

MObject create	(	const MString &	fullName,
		const MString &	briefName,
		short	defaultValue = 0,
		MStatus *	ReturnStatus = NULL
	)

Creates an enumerated attribute object.

The create method needs to be called on a per node basis. That means if you want to create and add the same attribute to multiple nodes, you need to call the create method for each node to get a unique MObject back. If you call create just once and add the attribute to multiple nodes, Maya will encounter a fatal error.

Parameters

[in]	fullName	The full name of the attribute
[in]	briefName	The brief name of the attribute
[in]	defaultValue	The default value of the attribute
[out]	ReturnStatus	Status code for the operation.

Returns

The newly created enumerated attribute object.

Status Codes:

• MS::kSuccess The attribute object was successfully created.
• MS::kInsufficientMemory There is no more memory

Examples:

AbcImport/AlembicNode.cpp, apiMeshShape/apiMeshCreator.cpp, buildRotationNode/buildRotationNode.cpp, cameraSetSubclass/exCameraSet.cpp, dx11Shader/dx11Shader.cpp, glslShader/GLSLShader.cpp, MayaPluginForSpreticle/spReticleLoc.cpp, meshOpCmd/meshOpNode.cpp, MetadataSample/tweakMetadataNode.cpp, transformDrawNode/transformDrawNode.cpp, and uiDrawManager/uiDrawManager.cpp.

MStatus addField	(	const MString &	fieldString,
		short	index
	)

Add a field (a string/index pair) to the enumeration.

Parameters

[in]	fieldString	The string describing the field
[in]	index	The index of the field

Returns

Status code for the operation

Status Codes:

• MS::kSuccess The field was successfully added
• MS::kInvalidParameter The passed index is already being used
• MS::kObjectDoesNotExist The attribute is not bound to an MObject

Examples:

AbcImport/AlembicNode.cpp, apiMeshShape/apiMeshCreator.cpp, buildRotationNode/buildRotationNode.cpp, cameraSetSubclass/exCameraSet.cpp, dx11Shader/dx11Shader.cpp, glslShader/GLSLShader.cpp, MayaPluginForSpreticle/spReticleLoc.cpp, meshOpCmd/meshOpNode.cpp, MetadataSample/tweakMetadataNode.cpp, transformDrawNode/transformDrawNode.cpp, and uiDrawManager/uiDrawManager.cpp.

MString fieldName	(	short	index,
		MStatus *	ReturnStatus = NULL
	)		const

Retrieve the string associated with a given index.

Parameters

[in]	index	The index of the string to look up
[out]	ReturnStatus	Status code for the operation.

Returns

The descriptive string corresponding to the given index

Status Codes:

• MS::kSuccess The attribute object was successfully created.
• MS::kInvalidParameter The index is out of range
• MS::kObjectDoesNotExist the attribute is not bound to an MObject

short fieldIndex	(	const MString &	fieldString,
		MStatus *	ReturnStatus = NULL
	)		const

Retrieve the index associated with a given string.

Parameters

[in]	fieldString	The string describing the field.
[out]	ReturnStatus	Status code for the operation.

Returns

The index associated with the given descriptive string.

Status Codes:

• MS::kSuccess The operation was successfully performed
• MS::kObjectDoesNotExist the attribute is not bound to an MObject

MStatus getMin

(

short &

minValue

)

const

Return the minimum value for this attribute.

Parameters

[out]

minValue

the minimum value for this attribute

Returns

• MS::kSuccess the operation succeeded
• MS::kFailure the attribute does not have a minimum
• MS::kObjectDoesNotExist this instance is not bound to an MObject

MStatus getMax

(

short &

maxValue

)

const

Return the maximum value for this attribute.

Parameters

[out]

maxValue

the maximum value for this attribute

Returns

• MS::kSuccess the operation succeeded
• MS::kFailure the attribute does not have a maximum
• MS::kObjectDoesNotExist this instance is not bound to an MObject

MStatus setDefault

(

short

index

)

Set a new default value for this enum attribute.

Parameters

[in]

index

new the default value for this attribute

Returns

• MS::kSuccess the operation succeeded
• MS::kObjectDoesNotExist this attribute is not bound to an MObject
• MS::kInvalidParameter this attribute is not a enum attribute, or the given index value is not valid.

MStatus setDefault

(

const MString &

fieldString

)

Set a new default value for this enum attribute.

Parameters

[in]

fieldString

new the default value for this attribute

Returns

• MS::kSuccess the operation succeeded
• MS::kObjectDoesNotExist this attribute is not bound to an MObject
• MS::kInvalidParameter this attribute is not a enum attribute, or the given string value does not exist in the enum

MStatus getDefault

(

short &

index

)

const

Get the default value for the enum attribute.

Parameters

[out]

index

default index value.

Returns

• MS::kSuccess the operation succeeded
• MS::kObjectDoesNotExist this attribute is not bound to an MObject
• MS::kInvalidParameter this attribute is not an enum

MString defaultValue

(

MStatus *

ReturnStatus = NULL

)

const

Get the default value for the enum attribute.

Parameters

[out]

ReturnStatus

Optional status code. See below.

Returns

the string value for the default enum

Status Codes:

• MS::kSuccess the operation succeeded
• MS::kObjectDoesNotExist this attribute is not bound to an MObject
• MS::kInvalidParameter this attribute is not an enum

MStatus getDefault

(

MString &

fieldString

)

const

NO SCRIPT SUPPORT.

Get the default value for the enum attribute.

Python Notes

This method is not supported in Python. Please see defaultValue()

Parameters

[out]

fieldString

the string value for the default enum

Returns

• MS::kSuccess the operation succeeded
• MS::kObjectDoesNotExist this attribute is not bound to an MObject
• MS::kInvalidParameter this attribute is not an enum

---

The documentation for this class was generated from the following files:

• MFnEnumAttribute.h
• MFnEnumAttribute.cpp