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SoGate.h

00001 /**************************************************************************\
00002  *
00003  *  This file is part of the Coin 3D visualization library.
00004  *  Copyright (C) 1998-2002 by Systems in Motion. All rights reserved.
00005  *
00006  *  This library is free software; you can redistribute it and/or
00007  *  modify it under the terms of the GNU Lesser General Public License
00008  *  version 2.1 as published by the Free Software Foundation. See the
00009  *  file LICENSE.LGPL at the root directory of the distribution for
00010  *  more details.
00011  *
00012  *  If you want to use Coin for applications not compatible with the
00013  *  LGPL, please contact SIM to acquire a Professional Edition license.
00014  *
00015  *  Systems in Motion, Prof Brochs gate 6, 7030 Trondheim, NORWAY
00016  *  http://www.sim.no support@sim.no Voice: +47 22114160 Fax: +47 22207097
00017  *
00018 \**************************************************************************/
00019 
00020 #ifndef COIN_SOGATE_H
00021 #define COIN_SOGATE_H
00022 
00023 #include <Inventor/engines/SoSubEngine.h>
00024 #include <Inventor/fields/SoMField.h>
00025 #include <Inventor/fields/SoSFBool.h>
00026 #include <Inventor/fields/SoSFTrigger.h>
00027 
00028 class SoEngineOutput;
00029 
00030 
00031 class COIN_DLL_API SoGate : public SoEngine {
00032   typedef SoEngine inherited;
00033 
00034   SO_ENGINE_HEADER(SoGate);
00035 
00036 public:
00037   static void initClass(void);
00038   SoGate(SoType type);
00039 
00040   SoSFBool enable;
00041   SoSFTrigger trigger;
00042   SoMField * input;
00043 
00044   SoEngineOutput * output;
00045 
00046 protected:
00047   virtual void inputChanged(SoField * which);
00048 
00049 private:
00050   SoGate(void);
00051   ~SoGate();
00052 
00053   virtual void evaluate(void);
00054 
00055   virtual SbBool readInstance(SoInput * in, unsigned short flags);
00056   virtual void writeInstance(SoOutput * out);
00057 
00058   SbBool initialize(const SoType inputfieldtype);
00059 
00060   virtual void copyContents(const SoFieldContainer * from,
00061                             SbBool copyconnections);
00062 
00063   // SoGate instances uses a dynamic set of inputs and outputs, as
00064   // they are not common for all instances of the class (like for most
00065   // of the other engines).
00066   SoFieldData * dynamicinput;
00067   SoEngineOutputData * dynamicoutput;
00068 
00069   // Avoid a g++/egcs warning due to the private default constructor.
00070   friend class dummy;
00071 };
00072 
00073 #endif // !COIN_SOGATE_H

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