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_SOELEMENT_H 00021 #define COIN_SOELEMENT_H 00022 00023 #include <Inventor/SbBasic.h> 00024 #include <Inventor/SoType.h> 00025 #include <Inventor/misc/SoState.h> 00026 #include <stdio.h> 00027 00028 class SoNode; 00029 00030 class COIN_DLL_API SoElement { 00031 public: 00032 static void initClass(void); 00033 00034 static SoType getClassTypeId(void); 00035 static int getClassStackIndex(void); 00036 const SoType getTypeId(void) const; 00037 int getStackIndex(void) const; 00038 00039 virtual void init(SoState * state); 00040 00041 virtual void push(SoState * state); 00042 virtual void pop(SoState * state, const SoElement * prevTopElement); 00043 00044 virtual SbBool isLazy(void) const; 00045 virtual void lazyEvaluate(void) const; 00046 00047 virtual SbBool matches(const SoElement * element) const = 0; 00048 virtual SoElement * copyMatchInfo(void) const = 0; 00049 00050 static void initElements(void); // only for base class (SoElement) 00051 00052 static int getNumStackIndices(void); 00053 static SoType getIdFromStackIndex(const int stackIndex); 00054 00055 void setDepth(const int depth); 00056 00057 int getDepth(void) const; 00058 00059 virtual void print(FILE * file = stdout) const; 00060 virtual ~SoElement(); 00061 00062 protected: 00063 SoElement(void); 00064 static int classStackIndex; 00065 00066 static SoElement * getElement(SoState * const state, const int stackIndex); 00067 static const SoElement * getConstElement(SoState * const state, 00068 const int stackIndex); 00069 00070 void capture(SoState * const state) const; 00071 virtual void captureThis(SoState * state) const; 00072 00073 void setTypeId(const SoType typeId); 00074 void setStackIndex(const int index); 00075 00076 SoType typeId; 00077 int stackIndex; 00078 00079 static int createStackIndex(const SoType id); 00080 static SoTypeList * stackToType; 00081 00082 int depth; 00083 00084 SoElement * getNextInStack(void) const; 00085 SoElement * getNextFree(void) const; 00086 00087 private: 00088 00089 static SoType classTypeId; 00090 00091 friend class SoState; // FIXME: bad design. 19990629 mortene. 00092 static void cleanup(void); 00093 SoElement * nextup; 00094 SoElement * nextdown; 00095 }; 00096 00097 // inlined methods 00098 00099 inline SoElement * 00100 SoElement::getElement(SoState * const state, 00101 const int stackIndex) 00102 { 00103 return state->getElement(stackIndex); 00104 } 00105 00106 #endif // !COIN_SOELEMENT_H