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lib/mayasdk6/include/maya/MObjectHandle.h

@@ -0,0 +1,120 @@
+#ifndef _MObjectHandle
+#define _MObjectHandle
+//
+//-
+// ==========================================================================
+// Copyright (C) 1995 - 2005 Alias Systems Corp. and/or its licensors.  All 
+// rights reserved.
+// 
+// The coded instructions, statements, computer programs, and/or related 
+// material (collectively the "Data") in these files contain unpublished 
+// information proprietary to Alias Systems Corp. ("Alias") and/or its 
+// licensors, which is protected by Canadian and US federal copyright law and 
+// by international treaties.
+// 
+// The Data may not be disclosed or distributed to third parties or be copied 
+// or duplicated, in whole or in part, without the prior written consent of 
+// Alias.
+// 
+// THE DATA IS PROVIDED "AS IS". ALIAS HEREBY DISCLAIMS ALL WARRANTIES RELATING 
+// TO THE DATA, INCLUDING, WITHOUT LIMITATION, ANY AND ALL EXPRESS OR IMPLIED 
+// WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND/OR FITNESS FOR A 
+// PARTICULAR PURPOSE. IN NO EVENT SHALL ALIAS BE LIABLE FOR ANY DAMAGES 
+// WHATSOEVER, WHETHER DIRECT, INDIRECT, SPECIAL, OR PUNITIVE, WHETHER IN AN 
+// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, OR IN EQUITY, 
+// ARISING OUT OF ACCESS TO, USE OF, OR RELIANCE UPON THE DATA.
+// ==========================================================================
+//+
+// *****************************************************************************
+//
+// CLASS:    MObjectHandle
+//
+// *****************************************************************************
+//
+// CLASS DESCRIPTION (MObjectHandle)
+//
+//  MObjectHandle is a wrapper class for the MObject class. An MObjectHandle
+//	will provide a user with added information on the validity of an MObject.
+//	Each MObjectHandle that is created registers an entry into a table to
+//	maintain state tracking of the MObject that the handle was created for.
+//	This will help users track when an MObject is invalid and should be
+//	re-retrieved.
+//
+// *****************************************************************************
+
+#if defined __cplusplus
+
+// *****************************************************************************
+
+// INCLUDED HEADER FILES
+
+#include <maya/MObject.h>
+
+// *****************************************************************************
+
+// DECLARATIONS
+
+// *****************************************************************************
+
+////////////////////////////////////////////////////////////////////////////////
+
+// CLASS DECLARATION (MObjectHandle)
+
+/// Generic Class for validating MObjects
+
+class OPENMAYA_EXPORT MObjectHandle
+{
+public:
+	///
+	MObjectHandle(); 
+	///
+	MObjectHandle( const MObject& object );
+	/// 
+	MObjectHandle( const MObjectHandle &handle ); 
+	///
+	~MObjectHandle();
+	///
+	MObject			object() const;
+	///
+	const MObject & objectRef() const;
+	///
+	bool			isValid() const;
+	///
+	bool			isAlive() const;
+	
+	///
+	bool			operator==(const MObject &object) const;
+	///
+	bool			operator==(const MObjectHandle &object) const;
+	///
+	bool			operator!=(const MObject &object) const; 
+	///
+	bool			operator!=(const MObjectHandle &object) const;
+	
+	/// 
+	MObjectHandle & operator=(const MObject &object );
+	/// 
+	MObjectHandle & operator=(const MObjectHandle &other );
+
+private:
+
+	// Internal object registration methods
+	void			registerObject();
+	void			deregisterObject();
+	
+	// Internal destructor callback
+	static void		registerDestroyedCallback();
+	static void		deregisterDestroyedCallback();
+	static bool		fIsCallbackInitialized;
+	static void		destroyedCallback(void*);
+
+	MObject			fObject;
+	bool			fIsAlive;
+	bool			fIsDependNode;
+	static int		fHandleCount;
+};
+
+// *****************************************************************************
+#endif /* __cplusplus */
+#endif /* _MObjectHandle */
+