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# SoSelectOne.h

    00001 /**************************************************************************\
    00002  *
    00003  *  This file is part of the Coin 3D visualization library.
    00004  *  Copyright (C) 1998-2003 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 General Public License
    00008  *  ("GPL") version 2 as published by the Free Software Foundation.
    00009  *  See the file LICENSE.GPL at the root directory of this source
    00010  *  distribution for additional information about the GNU GPL.
    00011  *
    00012  *  For using Coin with software that can not be combined with the GNU
    00013  *  GPL, and for taking advantage of the additional benefits of our
    00014  *  support services, please contact Systems in Motion about acquiring
    00015  *  a Coin Professional Edition License.
    00016  *
    00017  *  See <URL:http://www.coin3d.org> for  more information.
    00018  *
    00019  *  Systems in Motion, Teknobyen, Abels Gate 5, 7030 Trondheim, NORWAY.
    00020  *  <URL:http://www.sim.no>.
    00021  *
    00022 \**************************************************************************/
    00023
    00024 #ifndef COIN_SOSELECTONE_H
    00025 #define COIN_SOSELECTONE_H
    00026
    00027 #include <Inventor/engines/SoSubEngine.h>
    00028 #include <Inventor/fields/SoMField.h>
    00029 #include <Inventor/fields/SoSFInt32.h>
    00030
    00031 class SoEngineOutput;
    00032
    00033
    00034 class COIN_DLL_API SoSelectOne : public SoEngine {
    00035   typedef SoEngine inherited;
    00036
    00037   SO_ENGINE_HEADER(SoSelectOne);
    00038
    00039 public:
    00040   SoSFInt32 index;
    00041   SoMField * input;
    00042
    00043   SoEngineOutput * output; // The SoSField-version of the SoMField-type.
    00044
    00045   SoSelectOne(SoType inputtype);
    00046   static void initClass(void);
    00047
    00048 private:
    00049   SoSelectOne(void);
    00050   ~SoSelectOne();
    00051
    00052   virtual void evaluate(void);
    00053
    00054   virtual SbBool readInstance(SoInput * in, unsigned short flags);
    00055   virtual void writeInstance(SoOutput * out);
    00056
    00057   void initialize(const SoType inputfieldtype);
    00058
    00059   virtual void copyContents(const SoFieldContainer * from,
    00060                             SbBool copyconnections);
    00061
    00062   // SoSelectOne instances uses a dynamic set of inputs and outputs,
    00063   // as they are not common for all instances of the class (like for
    00064   // most of the other engines).
    00065   SoFieldData * dynamicinput;
    00066   SoEngineOutputData * dynamicoutput;
    00067
    00068   // Avoid a g++/egcs warning on the private default constructor.
    00069   friend class dummy;
    00070 };
    00071
    00072 #endif // !COIN_SOSELECTONE_H