#ifndef _MFnExpression
#define _MFnExpression
//-
// ==========================================================================
// 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// material (collectively the "Data") in these files contain unpublished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
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// ==========================================================================
//+
//
// CLASS:    MFnExpression
//
// ****************************************************************************

#if defined __cplusplus

// ****************************************************************************
// INCLUDED HEADER FILES


#include <maya/MFnDependencyNode.h>
#include <maya/MObject.h>
#include <maya/MString.h>

// ****************************************************************************
// DECLARATIONS

class MDoubleArray;
class MPtrBase;

// ****************************************************************************
// CLASS DECLARATION (MFnExpression)

//! \ingroup OpenMaya MFn
//! \brief Expression function set. 
/*!
  This class is used to create, edit, and query expression nodes.
*/
class OPENMAYA_EXPORT MFnExpression : public MFnDependencyNode
{
	declareMFn( MFnExpression, MFnDependencyNode );

public:
	//! Unit conversion modes.
	enum UnitConversion {
		kAll,				//!< Convert all units.
		kNone,				//!< Do not do any unit conversion.
		kAngularOnly		//!< Only convert angular units.
	};

	MObject  		create( const MString & expression,
							MObject & object = MObject::kNullObj,
							MStatus * ReturnStatus = NULL );

	MString			expression( MStatus * ReturnStatus = NULL);
	MStatus			setExpression( const MString & expression );

	MStatus			getDefaultObject( MObject & object );
	MStatus			setDefaultObject( MObject & object );
	bool			isAnimated( MStatus * ReturnStatus = NULL );
	MStatus			setAnimated( bool value = false );

	MStatus			evaluate( MDoubleArray & result );

	UnitConversion  unitConversion( MStatus * ReturnStatus = NULL ) const;
	MStatus         setUnitConversion( UnitConversion conversion );

BEGIN_NO_SCRIPT_SUPPORT:

 	declareMFnConstConstructor( MFnExpression, MFnDependencyNode );
	//!		NO SCRIPT SUPPORT
	MStatus			getExpression( MString & expression );

END_NO_SCRIPT_SUPPORT:

protected:
// No protected members

private:
// No private members
};

#endif /* __cplusplus */
#endif /* _MFnExpression */