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Torque/SDK/lib/mayasdk6/include/maya/MMessage.h

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+
+#ifndef _MMessage
+#define _MMessage
+//
+//-
+// ==========================================================================
+// Copyright  (C)  Alias Systems,  a division  of  Silicon Graphics  Limited.
+// All rights  reserved.  These coded  instructions,  statements and computer
+// programs  contain  unpublished information  proprietary to  Alias Systems,
+// a  division  of  Silicon  Graphics  Limited,  which  is  protected by  the
+// Canadian  and  US federal copyright law and  may not be disclosed to third
+// parties or  copied  or  duplicated,  in  whole  or in part,  without prior
+// written  consent  of Alias Systems, a division of Silicon Graphics Limited
+// ==========================================================================
+//+
+//
+// CLASS:    MMessage
+//
+// *****************************************************************************
+//
+// CLASS DESCRIPTION (MMessage)
+//
+// This is the base class for message callbacks.
+// 
+// There are three types of messages in maya that are exposed through the
+// API and they are the following:
+// scene messages, dependency graph messages, and dependency node messages.
+// can be registered for these messages using the addCallback
+// methods of the MSceneMessage, MDGMessage, and MNodeMessage classes.
+// 
+// When a callback is added a number or id is returned. This id is used to
+// keep track of the callback and is necessary for removing it.
+// A callback id with the value 'NULL' represents an invalid callback.
+// Use the removeCallback member function of this class for removing a
+// callback.
+//
+// It is the user's responsibility to keep track of the callback id's
+// and remove all callbacks for a plug-in when it is unloaded.
+//
+// *****************************************************************************
+
+#if defined __cplusplus
+
+// *****************************************************************************
+
+// INCLUDED HEADER FILES
+
+
+#include <maya/MStatus.h>
+
+// *****************************************************************************
+
+// DECLARATIONS
+
+typedef unsigned int MCallbackId;
+
+// Declaration for the callback table
+typedef struct MMessageNode {
+    void*           fClientPtr;
+	void*			fServerPtr;
+	void*           fSubClientPtr;
+	MCallbackId		fId;
+	bool			isValid;	// Unused
+} * MMessageNodePtr;
+
+// *****************************************************************************
+
+// CLASS DECLARATION (MMessage)
+
+class MIntArray;
+class MObject;
+
+/// Message base class
+/**
+*/
+#ifdef _WIN32
+#pragma warning(disable: 4522)
+#endif // _WIN32
+
+class OPENMAYA_EXPORT MMessage
+{ 
+public:	
+	///
+    static MStatus  removeCallback( MCallbackId id );
+	///
+    static MStatus  removeCallbacks( MIntArray &ids );
+	///
+	static MCallbackId	currentCallbackId( MStatus* ReturnStatus = NULL );
+	///
+	static MStatus	nodeCallbacks( MObject& node, MIntArray& ids );
+
+protected:
+    static void addNode( MMessageNodePtr node ); 
+    static void removeNode( MMessageNodePtr node );
+
+private:
+	static const char* 		className();
+};
+
+#ifdef _WIN32
+#pragma warning(default: 4522)
+#endif // _WIN32
+
+// *****************************************************************************
+
+#endif /* __cplusplus */
+#endif /* _MMessage */