SoSelection.h

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**=======================================================================*/
/*=======================================================================
** Author      : David Mott (MMM yyyy)
** Modified by : Thad Beier (MMM yyyy)
**=======================================================================*/
/*=======================================================================
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef  _SO_SELECTION_
#define  _SO_SELECTION_
 
#include <Inventor/SoLists.h>
#include <Inventor/SbColor.h>
#include <Inventor/misc/SoCallbackList.h>
#include <Inventor/nodes/SoSeparator.h>
 
#include <Inventor/STL/list>
 
class SoCallbackList;
class SoEvent;
class SoHandleEventAction;
class SoSearchAction;
class SoPickedPoint;
class SoPickedPointList;
class SoTypeList;
class SoSelection;
class SoPath;
 
 
// callback function prototypes
typedef void SoSelectionPathCB(void *userData, SoPath *path);
typedef void SoSelectionClassCB(void *userData, SoSelection *sel);
typedef SoPath * SoSelectionPickCB(void *userData, const SoPickedPoint *pick);
 
//
//  Class: SoSelection
//
//  Selection group node: Manages selection list from picks of its children.
//
 
 SO_PIMPL_PUBLIC_DECLARATION( SoSelection )
 
 
class  SoSelection : public SoSeparator {
 
  SO_NODE_HEADER(SoSelection);
  SO_PIMPL_PUBLIC_HEADER( SoSelection );
 
 public:
  SoSelection();
  SoSelection(int nChildren);
    
  //
  // Selection policy
  // ----------------
 
  // Default selection policy is SoSelection::SHIFT.
  enum Policy {
    SINGLE,
        
    TOGGLE,
        
    SHIFT,
 
    DISABLE
  };
 
  // Fields
  SoSFEnum            policy;
 
  //
  // Selection list management
  // -------------------------
 
  void                select(const SoPath *path);    
  void                select(SoNode *node);
 
  void                deselect(const SoPath *path);
  void                deselect(int which);
  void                deselect(SoNode *node);
 
  void                toggle(const SoPath *path);
  void                toggle(SoNode *node);
 
  SbBool              isSelected(const SoPath *path) const;
  SbBool              isSelected(SoNode *node) const;
  SbBool              isSelected(const SoNode *node) const;
    
  void                deselectAll();
 
  int getNumSelected() const;
  const SoPathList* getList() const;
  SoPath              *getPath(int index) const;
 
  SoPath *            operator [](int i) const
    { return getPath(i); }
 
    void setPickRadius( float radiusInPixels );
 
    float getPickRadius() const;
 
  //
  // Selection change callbacks
  // --------------------------
  //
  // Callbacks are invoked when an object is selected or deselected.
  //
    
  void    addSelectionCallback(SoSelectionPathCB *f, void *userData = NULL);
  void    removeSelectionCallback(SoSelectionPathCB *f, void *userData = NULL);
    
  void    addDeselectionCallback(SoSelectionPathCB *f, void *userData = NULL);
  void    removeDeselectionCallback(SoSelectionPathCB *f, void *userData = NULL);
 
  void    addStartCallback(SoSelectionClassCB *f, void *userData = NULL);
  void    removeStartCallback(SoSelectionClassCB *f, void *userData = NULL);
    
  void    addFinishCallback(SoSelectionClassCB *f, void *userData = NULL);
  void    removeFinishCallback(SoSelectionClassCB *f, void *userData = NULL);
 
  void    setPickFilterCallback(
                                SoSelectionPickCB *f,
                                void *userData = NULL, 
                                SbBool callOnlyIfSelectable = TRUE); 
    
  void setPickMatching( SbBool pickTwice );
  SbBool isPickMatching() const;
 
 private:
  // Traversal routine for SoHandleEventAction - this will call
  // action->setHandled() if the event is handled
  virtual void        handleEvent(SoHandleEventAction *action);
 
 private:
 
  virtual void notify(SoNotList *list);
 
  // Selection notify callbacks - invoked whenever the selection changes.
  // Used by the render area to redraw for selection highlighting.
  void   addChangeCallback(SoSelectionClassCB *f, void *userData = NULL);
  void   removeChangeCallback(SoSelectionClassCB *f, void *userData = NULL);
 
  SbBool getPickMatching() const;
 
  // Internal:
  static void         initClass();
  static void         exitClass();
 
  // add a list of paths without duplication check
  void addPaths( const SoPathList &in );
 
 private:
 
  // Destructor removes everything from the list.
  virtual ~SoSelection();
 
 private:
 
  // this is called from the two constructors.
  void                constructorCommon();  
};
 
#endif /* _SO_SELECTION_ */