#include <MEventMessage.h>

Class Description

Event messages.

This class is used to register callbacks for specific events.

The first parameter passed to the add callback method is the name of the event that will trigger the callback. The list of available event names can be retrieved by calling the getEventNames method or by using the -listEvents flag on the scriptJob command.

The add callback method returns an id which is used to remove the callback.

To remove a callback use MMessage::removeCallback.

All callbacks that are registered by a plug-in must be removed by that plug-in when it is unloaded. Failure to do so will result in a fatal error.

Inheritance diagram for MEventMessage:

Static Public Member Functions
static MCallbackId	addEventCallback (const MString &event, MMessage::MBasicFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback for event occurred messages. More...

static MStatus	getEventNames (MStringArray &names)
	This method returns the list of available event names. More...

static const char *	className ()
	Returns the name of this class. More...

Static Public Member Functions inherited from MMessage
static MStatus	removeCallback (MCallbackId id)
	Remove the specified callback from maya. More...

static MStatus	removeCallbacks (MCallbackIdArray &ids)
	Remove all of the specified callbacks from maya. More...

static MCallbackId	currentCallbackId (MStatus *ReturnStatus=NULL)
	Return the callback ID of the currently executing callback. More...

static MStatus	nodeCallbacks (MObject &node, MCallbackIdArray &ids)
	Returns a list of callback IDs associated registered to a given node. More...

static void	setRegisteringCallableScript ()
	Mark this MMessage object as one that will be passed callbacks defined in script.

static bool	registeringCallableScript ()
	Return true if this MMessage object has its callbacks defined in script.

static const char *	className ()
	Returns the name of this class. More...

static MStatus	removeCallbacks (MIntArray &ids)
	This method is obsolete. This method is not available in Python. More...

static MStatus	nodeCallbacks (MObject &node, MIntArray &ids)
	This method is obsolete. More...

Additional Inherited Members
Public Types inherited from MMessage
enum	Action { kDefaultAction, kDoNotDoAction, kDoAction }
	Callback result action codes. More...

typedef void(*	MBasicFunction) (void *clientData)
	Pointer to a basic callback function. More...

typedef void(*	MElapsedTimeFunction) (float elapsedTime, float lastTime, void *clientData)
	Pointer to an elapsed time callback function. More...

typedef void(*	MCheckFunction) (bool retCode, void clientData)
	Pointer to callback function which returns a true/false result. More...

typedef void(*	MCheckFileFunction) (bool retCode, MFileObject &file, void clientData)
	Pointer to a callback function which takes a file object and returns a result. More...

typedef void(*	MCheckPlugFunction) (bool retCode, MPlug &plug, void clientData)
	Pointer to a callback function which takes a plug and returns a result. More...

typedef void(*	MComponentFunction) (MUintArray componentIds[], unsigned int count, void *clientData)
	Pointer to a callback function which takes an array of component ids. More...

typedef void(*	MNodeFunction) (MObject &node, void *clientData)
	Pointer to a callback function which takes a dependency node. More...

typedef void(*	MStringFunction) (const MString &str, void *clientData)
	Pointer to callback function which takes a string. More...

typedef void(*	MTwoStringFunction) (const MString &str1, const MString &str2, void *clientData)
	Pointer to a callback function which takes two strings. More...

typedef void(*	MThreeStringFunction) (const MString &str1, const MString &str2, const MString &str3, void *clientData)
	Pointer to a callback function which takes three strings. More...

typedef void(*	MStringIntBoolIntFunction) (const MString &str, unsigned int index, bool flag, unsigned int type, void *clientData)
	Pointer to callback function which takes a string, an index, a flag and a type. More...

typedef void(*	MStringIndexFunction) (const MString &, unsigned int index, void *clientData)
	Pointer to callback function which takes a string and index. More...

typedef void(*	MNodeStringBoolFunction) (MObject &node, const MString &, bool, void *clientData)
	Pointer to a callback function which takes a node, a string and a boolean. More...

typedef void(*	MStateFunction) (bool state, void *clientData)
	Pointer to a callback function which takes a boolean state. More...

typedef void(*	MTimeFunction) (MTime &time, void *clientData)
	Pointer to callback function which takes a time. More...

typedef void(*	MPlugFunction) (MPlug &srcPlug, MPlug &destPlug, bool made, void *clientData)
	Pointer to plug connection callback function. More...

typedef void(*	MNodePlugFunction) (MObject &node, MPlug &plug, void *clientData)
	Pointer to a callback function which takes a dependency node and a plug. More...

typedef void(*	MNodeStringFunction) (MObject &node, const MString &str, void *clientData)
	Pointer to a callback function which takes a dependency node and a string. More...

typedef void(*	MParentChildFunction) (MDagPath &child, MDagPath &parent, void *clientData)
	Pointer to to a callback function which takes two DAG nodes in a parent/child relationship. More...

typedef void(*	MModifierFunction) (MDGModifier &modifier, void *clientData)
	Pointer to a callback function which takes a DG modifier. More...

typedef void(*	MStringArrayFunction) (const MStringArray &strs, void *clientData)
	Pointer to a callback function which takes a string array. More...

typedef void(*	MNodeModifierFunction) (MObject &node, MDGModifier &modifier, void *clientData)
	Pointer to a callback function which takes a dependency node and a DG modifier. More...

typedef void(*	MObjArray) (MObjectArray &objects, void *clientData)
	Pointer to a callback function which takes an array of objects. More...

typedef void(*	MNodeObjArray) (MObject &node, MObjectArray &objects, void *clientData)
	Pointer to a callback function which takes a dependency node and an array of objects. More...

typedef void(*	MStringNode) (const MString &str, MObject &node, void *clientData)
	Pointer to a callback function which takes a string and a dependency node. More...

typedef void(*	MCameraLayerFunction) (MObject &cameraSetNode, unsigned int multiIndex, bool added, void *clientData)
	Pointer to a callback function which takes a dependency node, an unsigned integer, and a boolean value. More...

typedef void(*	MCameraLayerCameraFunction) (MObject &cameraSetNode, unsigned int multiIndex, MObject &oldCamera, MObject &newCamera, void *clientData)
	Pointer to a callback function which takes a dependency node, an unsigned integer, and two camera transform nodes. More...

typedef void(*	MConnFailFunction) (MPlug &srcPlug, MPlug &destPlug, const MString &srcPlugName, const MString &dstPlugName, void *clientData)
	Pointer to connection-failed callback function. More...

typedef void(*	MPlugsDGModFunction) (MPlugArray &plugs, MDGModifier &modifier, void *clientData)
	Pointer to a callback function which takes an array of MPlugs and an MDGModifier. More...

typedef void(*	MNodeUuidFunction) (MObject &node, const MUuid &uuid, void *clientData)
	Pointer to a callback function which takes a dependency node and a UUID. More...

typedef Action(*	MCheckNodeUuidFunction) (bool doAction, MObject &node, MUuid &uuid, void *clientData)
	Pointer to a callback function which takes a dependency node and a UUID, and returns a result. More...

typedef void(*	MObjectFileFunction) (const MObject &object, const MFileObject &file, void *clientData)
	Pointer to a callback function which takes an object and a file object. More...

typedef void(*	MCheckObjectFileFunction) (bool retCode, const MObject &referenceNode, MFileObject &file, void clientData)
	Pointer to a callback function which takes an object and a file object and returns a result. More...

typedef void(*	MRenderTileFunction) (int originX, int originY, int tileMaxX, int tileMaxY, const void *tileData)
	Pointer to a callback function which receives origin, size and image data. More...

Member Function Documentation

MCallbackId addEventCallback	(	const MString &	eventName,
		MMessage::MBasicFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback for event occurred messages.

The callback function will be passed the any client data that was provided when the callback was registered.

Parameters

[in]	eventName	the event to register the callback for
[in]	func	the callback function

clientData User defined data passed to the callback function

Parameters

[in]	clientData	User defined data that will be passed to the callback function
[out]	ReturnStatus	status code

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded
MS::kUnknownParameter The named event could not be found
MS::kInsufficientMemory No memory available
MS::kFailure Error adding callback

Examples:: apiDirectionalLightShape/apiDirectionalLightShape.cpp, dx11Shader/dx11Shader.cpp, eventTest/eventTest.cpp, footPrintManip/footPrintManip.cpp, footPrintNode/footPrintNode.cpp, glslShader/GLSLShader.cpp, gpuCache/gpuCacheShapeNode.cpp, gpuCache/gpuCacheSubSceneOverride.cpp, manipOverride/manipOverride.cpp, rawfootPrintNode/rawfootPrintNode.cpp, and undoRedoMsgCmd/undoRedoMsgCmd.cpp.

MStatus getEventNames ( MStringArray & names )

static

This method returns the list of available event names.

Parameters

[out] names set to the array of available event names.

Returns

MS::kSuccess Operation succeeded
MS::kInsufficientMemory No memory available
MS::kFailure Error retrieving event names

Examples:: eventTest/eventTest.cpp.

const char * className ( )

static

Returns the name of this class.

Returns: The name of this class.

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

MEventMessage.h
MEventMessage.cpp

MEventMessage Class Reference

Class Description

Static Public Member Functions

Additional Inherited Members

Member Function Documentation