Inventor/misc/SoState.h

Go to the documentation of this file.

/*=======================================================================
 * Copyright 1991-1996, Silicon Graphics, Inc.
 * ALL RIGHTS RESERVED
 *
 * UNPUBLISHED -- Rights reserved under the copyright laws of the United
 * States.   Use of a copyright notice is precautionary only and does not
 * imply publication or disclosure.
 *
 * U.S. GOVERNMENT RESTRICTED RIGHTS LEGEND:
 * Use, duplication or disclosure by the Government is subject to restrictions
 * as set forth in FAR 52.227.19(c)(2) or subparagraph (c)(1)(ii) of the Rights
 * in Technical Data and Computer Software clause at DFARS 252.227-7013 and/or
 * in similar or successor clauses in the FAR, or the DOD or NASA FAR
 * Supplement.  Contractor/manufacturer is Silicon Graphics, Inc.,
 * 2011 N. Shoreline Blvd. Mountain View, CA 94039-7311.
 *
 * THE CONTENT OF THIS WORK CONTAINS CONFIDENTIAL AND PROPRIETARY
 * INFORMATION OF SILICON GRAPHICS, INC. ANY DUPLICATION, MODIFICATION,
 * DISTRIBUTION, OR DISCLOSURE IN ANY FORM, IN WHOLE, OR IN PART, IS STRICTLY
 * PROHIBITED WITHOUT THE PRIOR EXPRESS WRITTEN PERMISSION OF SILICON
 * GRAPHICS, INC.
**=======================================================================*/
/*=======================================================================
** Author      : Paul S. Strauss (MMM yyyy)
**=======================================================================*/
/*=======================================================================
 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
 ***              AND IS DISTRIBUTED UNDER A LICENSE AGREEMENT.                     ***
 ***                                                                                ***
 ***  REPRODUCTION, DISCLOSURE,  OR USE,  IN WHOLE OR IN PART,  OTHER THAN AS       ***
 ***  SPECIFIED  IN THE LICENSE ARE  NOT TO BE  UNDERTAKEN  EXCEPT WITH PRIOR       ***
 ***  WRITTEN AUTHORIZATION OF FEI S.A.S.                                           ***
 ***                                                                                ***
 ***                        RESTRICTED RIGHTS LEGEND                                ***
 ***  USE, DUPLICATION, OR DISCLOSURE BY THE GOVERNMENT OF THE CONTENT OF THIS      ***
 ***  WORK OR RELATED DOCUMENTATION IS SUBJECT TO RESTRICTIONS AS SET FORTH IN      ***
 ***  SUBPARAGRAPH (C)(1) OF THE COMMERCIAL COMPUTER SOFTWARE RESTRICTED RIGHT      ***
 ***  CLAUSE  AT FAR 52.227-19  OR SUBPARAGRAPH  (C)(1)(II)  OF  THE RIGHTS IN      ***
 ***  TECHNICAL DATA AND COMPUTER SOFTWARE CLAUSE AT DFARS 52.227-7013.             ***
 ***                                                                                ***
 ***                   COPYRIGHT (C) 1996-2018 BY FEI S.A.S,                        ***
 ***                        BORDEAUX, FRANCE                                        ***
 ***                      ALL RIGHTS RESERVED                                       ***
**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/

#ifndef  _SO_STATE_
#define  _SO_STATE_

#include <Inventor/SoLists.h>

class SoAction;
class SoElement;

SoEXTENDER_Documented class  SoState {

public:
  SoState(SoAction *action, const SoTypeList &enabledElements);

  ~SoState();

  inline SoAction* getAction() const
  { return m_action; }

  template<typename T>
  inline T* getElement()
  {
    return static_cast<T*>(getElement(T::getClassTypeId(), T::getClassStackIndex()));
  }

  SoElement* getElement(const SoType& type, const int stackIndex);

  template<typename T>
  inline const T* getConstElement() const
  {
    return static_cast<const T*>(getConstElement(T::getClassTypeId(), T::getClassStackIndex(), true));
  }

  inline const SoElement* getConstElement(const SoType& type, const int stackIndex) const
  {
    return getConstElement(type, stackIndex, false);
  }

  void push();

  void pop();

  void print(FILE *fp);

#if 1             SoDEPRECATED
  SoElement* getElement(const int stackIndex);SoDEPRECATED
  const SoElement* getConstElement(const int stackIndex) const;

#endif 
 private:

  class PushPop
  {
  public:
    PushPop(SoState* state) : m_state(state) { m_state->push(); }
    ~PushPop() { m_state->pop(); }
  private:
    SoState* m_state;
  };


  inline SbBool isElementEnabled(const SoType& type, const int stackIndex, SbBool checkType = TRUE) const
  {
    if ( !s_checkStateElementsType )
      return isElementEnabled(stackIndex);
    return isElementEnabledChecked(type,stackIndex,checkType);
  }

  // Returns TRUE if element with given stack index is enabled in state
  inline SbBool isElementEnabled(const int stackIndex) const
  {
    if (m_stack && (stackIndex < m_numStacks))
      return (m_stack[stackIndex] != NULL);
    else
      return FALSE;
  }

  // Returns current depth of state
  inline int getDepth() const
  { return m_depth; }

  // Sets/returns flag that indicates whether a cache is open. This
  // flag lets us optimize element capturing; we don't need to try
  // to capture elements if the flag is FALSE.
  inline void setCacheOpen(const SbBool flag)
  { m_cacheOpen = flag; }

  inline SbBool isCacheOpen() const
  { return m_cacheOpen; }

  inline bool trackDependencies(bool flag)
  {
    bool oldValue = m_trackElementsDependencies;
    m_trackElementsDependencies = flag;
    return oldValue;
  }

  bool isTrackingDependencies() const;
  
  template<typename T>
  inline T* getElementNoPush() const
  {
    return static_cast<T*>(getElementNoPush(T::getClassTypeId(), T::getClassStackIndex()));
  }

  inline SoElement* getElementNoPush(SoType type, const int stackIndex) const
  {
    return const_cast<SoElement*>(getConstElement(type, stackIndex, true));
  }

  // Internal-only.
  // Pops from the an element corresponding to classStackIndex.
  // Only the side effect of popping is done (ie. the element is not
  // removed from the stack).
  void popElement(const int classStackIndex) ;

  inline const SoElement* getConstElement(const SoType& type, const int stackIndex, bool checkType) const
  {
    //This method must be fast, it is called very often so avoid
    //testing for m_stask, it can't be NULL (set at contructor and deleted 
    //in destructor only)
    const SoElement* elt = stackIndex < m_numStacks ? m_stack[stackIndex] : NULL;
    if ( elt == NULL )
    {
      enableMissingElement(type, stackIndex, checkType);
      return m_stack[stackIndex];
    }

    return elt;
  }

  inline const SoElement* getTopElement() const { return m_topElement; }

  void insertElement( SoElement* );

#if 1             SoDEPRECATED
  SoElement* getElementNoPush(const int stackIndex) const;

#endif 
private:

  void enableSendToGL(bool enable);

  bool isSendToGLEnabled() const;

private:

  SbBool isElementEnabledChecked(const SoType& type, const int stackIndex, SbBool checkType = TRUE) const;

  SoType getBestElementType(const SoType& type) const;

  void createDepth0Element(int stackIndex);

  void displayStack(const char *funcStr);

  void checkStateConsistency(const char *funcStr);

  void enableMissingElement(const SoType& type, int stackIndex, bool checkType) const;

  SoAction            *m_action;        // Action instance state is in
  int                 m_depth;          // Current depth
  SoElement           **m_stack;        // Array of element stacks
  int                 m_numStacks;      // Number of stacks in array
  SoElement *         m_topElement;     // First element in threaded stack

  SbBool              m_cacheOpen;      // TRUE if a cache is open
  bool                m_enableSendToGL; // send to OpenGL activation flag
  bool m_trackElementsDependencies;
  
  bool m_actionNeedDependencies;

  bool m_usingGLAction;

  static int s_checkStateConsistency;
  static int s_displayStateElements;
  static int s_checkStateElementsType;
  static bool s_printStateDepth;
  static FILE* s_stateDepthFile;
};

#endif  /* _SO_STATE_ */

---

Open Inventor Toolkit reference manual, generated on 15 Mar 2023
Copyright © Thermo Fisher Scientific All rights reserved. http://www.openinventor.com/