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/*
*
* Copyright (C) 2000 Silicon Graphics, Inc. All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/NoticeExplan/
*
*/
// -*- C++ -*-
/*
* Copyright (C) 1990,91 Silicon Graphics, Inc.
*
_______________________________________________________________________
______________ S I L I C O N G R A P H I C S I N C . ____________
|
| $Revision: 1.1.1.1 $
|
| Description:
| This file defines the abstract SoEXTENDER SoReplacedElement class.
|
| Classes:
| SoReplacedElement
|
| Author(s) : Paul S. Strauss
|
______________ S I L I C O N G R A P H I C S I N C . ____________
_______________________________________________________________________
*/
#ifndef _SO_REPLACED_ELEMENT
#define _SO_REPLACED_ELEMENT
//////////////////////////////////////////////////////////////////////////////
//
// Class: SoReplacedElement
//
// This is the abstract base class for each state element whose value
// is replaced whenever it is set. (Most state elements fall into
// this category, so most are derived from this class.)
//
// This class overrides the SoElement::getElement() method to store
// the node-id of the node that is about to set the value in the
// element (i.e., the node that is passed to getElement()). This
// class also defines the SoElement::matches() method to return TRUE
// if the node-id's of the two elements match. Subclasses can change
// this behavior by defining matches() differently, if they wish. For
// example, they can compare the elements' values, instead.
//
//////////////////////////////////////////////////////////////////////////////
#include <Inventor/elements/SoSubElement.h>
SoEXTENDER class SoReplacedElement : public SoElement {
SO_ELEMENT_ABSTRACT_HEADER(SoReplacedElement);
public:
// Initializes node id in element
virtual void init(SoState *state);
// Returns TRUE if the element matches another element, based on node-id
virtual SbBool matches(const SoElement *elt) const;
// Prints element (for debugging)
virtual void print(FILE *fp) const;
SoINTERNAL public:
// Initializes the SoReplacedElement class
static void initClass();
// Create and return a copy of this element. The only operation
// supported by the copy is matches() (the copy will be
// unitialized except for the nodeId).
virtual SoElement *copyMatchInfo() const;
// Return nodeId. This was added so the SoTransformSeparator
// class can figure out whether or not it contains a camera:
uint32_t getNodeId() const { return nodeId; }
protected:
uint32_t nodeId;
// Overrides SoElement::getElement() to set the nodeId in the
// element instance before returning it.
static SoElement * getElement(SoState *state, int stackIndex,
SoNode *node);
// Destructor
virtual ~SoReplacedElement();
};
#endif /* _SO_REPLACED_ELEMENT */
|
