#ifndef _MCommandMessage
#define _MCommandMessage
//
//-
// ==========================================================================
// Copyright (C) 1995 - 2006 Autodesk, Inc., 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// material (collectively the "Data") in these files contain unpublished 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 Autodesk, Inc. ("Autodesk") and/or its 
// licensors,  which is protected by U.S. and Canadian 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 Autodesk.
// 
// The copyright notices in the Software and this entire statement, 
// including the above license grant, this restriction and the following 
// disclaimer, must be included in all copies of the Software, in whole 
// or in part, and all derivative works of the Software, unless such copies 
// or derivative works are solely in the form of machine-executable object 
// code generated by a source language processor.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND. 
// AUTODESK DOES NOT MAKE AND HEREBY DISCLAIMS ANY EXPRESS OR IMPLIED 
// WARRANTIES INCLUDING, BUT NOT LIMITED TO, THE WARRANTIES OF 
// NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, 
// OR ARISING FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE. IN NO 
// EVENT WILL AUTODESK AND/OR ITS LICENSORS BE LIABLE FOR ANY LOST 
// REVENUES, DATA, OR PROFITS, OR SPECIAL, DIRECT, INDIRECT, OR 
// CONSEQUENTIAL DAMAGES, EVEN IF AUTODESK AND/OR ITS LICENSORS HAS 
// BEEN ADVISED OF THE POSSIBILITY OR PROBABILITY OF SUCH DAMAGES. 
// ==========================================================================
//+
//
// CLASS:    MCommandMessage
//
// ****************************************************************************
//
// CLASS DESCRIPTION (MCommandMessage)
//
//  This class is used to register for a callback for when certain MEL command
//	related messages are generated.
//	
//	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.
//
// ****************************************************************************

#if defined __cplusplus

// ****************************************************************************

// INCLUDED HEADER FILES


#include <maya/MMessage.h>
#include <maya/MString.h>

// ****************************************************************************

// DECLARATIONS


// ****************************************************************************

// CLASS DECLARATION (MCommandMessage)

/**
*/
#ifdef _WIN32
#pragma warning(disable: 4522)
#endif // _WIN32

/// Helper class to handle MEL output
class OPENMAYA_EXPORT MCommandMessage : public MMessage
{ 
public:
	///
	enum MessageType {
		/// Command history
		kHistory,
		/// String to display unmodified
		kDisplay,
		/// General information
		kInfo,
		/// Warning message
		kWarning,
		/// Error message
		kError,
		/// Result from a command execution in the command window
		kResult,
		/// Stack trace
		kStackTrace
	};
	///
	static MCallbackId	addCommandCallback(
								void (*func)( const MString &, 
											  void* clientData ),
								void * clientData = NULL,
								MStatus * ReturnStatus = NULL );

	///
	static MCallbackId	addCommandOutputCallback(
								void (*func)( const MString & message,
											  MessageType messageType,
											  void* clientData ),
								void * clientData = NULL,
								MStatus * ReturnStatus = NULL );
private: 
	static const char* className();
};

#ifdef _WIN32
#pragma warning(default: 4522)
#endif // _WIN32

// ****************************************************************************

#endif /* __cplusplus */
#endif /* _MCommandMessage */
