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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 some macros that implement things common to
| many subclasses of SoElement. They may be used to make SoElement
| subclassing easier. In all of the macros, the "className"
| parameter refers to the name of the element subclass.
|
| Defined macros:
|
| Within class header:
|
| SO_ELEMENT_ABSTRACT_HEADER(className)
| SO_ELEMENT_HEADER(className)
|
| Within class source:
|
| At file scope:
|
| SO_ELEMENT_ABSTRACT_SOURCE(className)
| SO_ELEMENT_SOURCE(className)
|
| Class initialization (in initClass):
|
| SO_ELEMENT_INIT_ABSTRACT_CLASS()
| SO_ELEMENT_INIT_CLASS()
|
|
| 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_SUB_ELEMENT_
#define _SO_SUB_ELEMENT_
#include <Inventor/elements/SoElement.h>
// C-api: end
/////////////////////////////////////////////////////////////////////////////
//
// Macros to be called within the class definition header for a element
// subclass:
//
////////////////////////////////////////////
//
// These define type-identifier and stack index variables and methods
// that all subclasses must support.
//
//
// This one is for abstract element classes.
//
#define SO_ELEMENT_ABSTRACT_HEADER(className) \
public: \
static SoType getClassTypeId() { return classTypeId; } \
static int getClassStackIndex() { return classStackIndex; } \
protected: \
static int classStackIndex; \
className(); \
private: \
static SoType classTypeId
//
// This one is for non-abstract element classes.
//
#define SO_ELEMENT_HEADER(className) \
SO_ELEMENT_ABSTRACT_HEADER(className); \
private: \
static void *createInstance()
/////////////////////////////////////////////////////////////////////////////
//
// Macros to be called within the source file for a element subclass:
//
////////////////////////////////////////////
//
// This declares the static variables defined in SO_ELEMENT_HEADER
// or SO_ELEMENT_ABSTRACT_HEADER.
//
#define SO__ELEMENT_ABSTRACT_VARS(className) \
SoType className::classTypeId; \
int className::classStackIndex
#define SO__ELEMENT_VARS(className) \
SO__ELEMENT_ABSTRACT_VARS(className)
//
// Methods on an abstract type
//
#define SO__ELEMENT_ABSTRACT_METHODS(className) \
\
className::className() \
{ \
}
//
// Methods on a non-abstract type
//
#define SO__ELEMENT_METHODS(className) \
\
className::className() \
{ \
setTypeId(classTypeId); \
setStackIndex(classStackIndex); \
} \
\
void * \
className::createInstance() \
{ \
return new className; \
}
/////////////////////////////////////////////
//
// These include all the definitions required
// at file scope
//
#define SO_ELEMENT_ABSTRACT_SOURCE(className) \
SO__ELEMENT_ABSTRACT_VARS(className); \
SO__ELEMENT_ABSTRACT_METHODS(className)
#define SO_ELEMENT_SOURCE(className) \
SO__ELEMENT_VARS(className); \
SO__ELEMENT_METHODS(className)
////////////////////////////////////////////
//
// This initializes the type identifer variables defined in
// SO_ELEMENT_HEADER or SO_ELEMENT_ABSTRACT_HEADER. This macro
// should be called from within initClass(). The parentClass argument
// should be the class that this subclass is derived from.
//
#define SO_ELEMENT_INIT_ABSTRACT_CLASS(className,parentClass) \
do { \
classTypeId = SoType::createType(parentClass::getClassTypeId(), \
SO__QUOTE(className), \
NULL); \
if (parentClass::classStackIndex < 0) \
classStackIndex = createStackIndex(classTypeId); \
else \
classStackIndex = parentClass::classStackIndex; \
} while (0)
#define SO_ELEMENT_INIT_CLASS(className,parentClass) \
do { \
classTypeId = SoType::createType(parentClass::getClassTypeId(), \
SO__QUOTE(className), \
&className::createInstance); \
if (parentClass::classStackIndex < 0) \
classStackIndex = createStackIndex(classTypeId); \
else \
classStackIndex = parentClass::classStackIndex; \
} while (0)
// C-api: begin
#endif /* _SO_SUB_ELEMENT_ */
|
