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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 $
|
| Classes:
| SoSFTrigger
|
| Author(s) : Ronen Barzel
|
______________ S I L I C O N G R A P H I C S I N C . ____________
_______________________________________________________________________
*/
#ifndef _SO_SF_TRIGGER_
#define _SO_SF_TRIGGER_
#include <Inventor/fields/SoSubField.h>
//////////////////////////////////////////////////////////////////////////////
//
// SoSFTrigger subclass of SoSField.
//
//////////////////////////////////////////////////////////////////////////////
// C-api: prefix=SoSTrigger
class SoSFTrigger : public SoSField {
// Use standard field stuff
SO_SFIELD_REQUIRED_HEADER(SoSFTrigger);
SO_SFIELD_CONSTRUCTOR_HEADER(SoSFTrigger);
public:
// equivalent to SoField::touch(). Kept for consistency
void setValue() { touch(); }
// getValue is a no-op:
void getValue() const { }
// Start notification.
virtual void touch();
// Equality/inequality tests. Since there are no values, trigger
// fields are all the same
int operator ==(const SoSFTrigger &t) const;
int operator !=(const SoSFTrigger &t) const;
SoINTERNAL public:
static void initClass();
// Notification can flow through a trigger, but can't start at a
// trigger. The only way to start notification at a trigger is to
// call touch().
virtual void startNotify();
// Override notify to always evaluate (after passing on
// notification) to clear upstream dirty bits
virtual void notify(SoNotList *list);
private:
// Reading and writing. These are no-ops.
virtual SbBool readValue(SoInput *in);
virtual void writeValue(SoOutput *out) const;
};
#endif /* _SO_SF_TRIGGER_ */
|
