Inventor/draggers/SoDragPointDragger.h

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/*=======================================================================
 * Copyright 1991-1996, Silicon Graphics, Inc.
 * ALL RIGHTS RESERVED
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 * in Technical Data and Computer Software clause at DFARS 252.227-7013 and/or
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**=======================================================================*/
/*=======================================================================
** Author      : Paul Isaacs (MMM yyyy)
** Modified by : Howard Look (MMM yyyy)
**=======================================================================*/
/*=======================================================================
 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/


#ifndef  _SO_DRAGPOINT_DRAGGER_
#define  _SO_DRAGPOINT_DRAGGER_

#include <Inventor/SbLinear.h>
#include <Inventor/SbBox.h>
#include <Inventor/draggers/SoDragger.h>
#include <Inventor/fields/SoSFVec3f.h>
#include <Inventor/sensors/SoSensor.h>


class SoFieldSensor;

//
//  Class: SoDragPointDragger
//
//  DragPoint dragger - allows user to move a single coordinate in
//  three dimensions.
//

class  SoDragPointDragger : public SoDragger
{
  SO_KIT_HEADER(SoDragPointDragger);

  SO_KIT_CATALOG_ENTRY_HEADER(noRotSep);
  SO_KIT_CATALOG_ENTRY_HEADER(xTranslatorSwitch);
  SO_KIT_CATALOG_ENTRY_HEADER(xTranslator);
  SO_KIT_CATALOG_ENTRY_HEADER(xyTranslatorSwitch);
  SO_KIT_CATALOG_ENTRY_HEADER(xyTranslator);

  SO_KIT_CATALOG_ENTRY_HEADER(rotXSep);
  SO_KIT_CATALOG_ENTRY_HEADER(rotX);
  SO_KIT_CATALOG_ENTRY_HEADER(xzTranslatorSwitch);
  SO_KIT_CATALOG_ENTRY_HEADER(xzTranslator);

  SO_KIT_CATALOG_ENTRY_HEADER(rotYSep);
  SO_KIT_CATALOG_ENTRY_HEADER(rotY);
  SO_KIT_CATALOG_ENTRY_HEADER(zTranslatorSwitch);
  SO_KIT_CATALOG_ENTRY_HEADER(zTranslator);
  SO_KIT_CATALOG_ENTRY_HEADER(yzTranslatorSwitch);
  SO_KIT_CATALOG_ENTRY_HEADER(yzTranslator);

  SO_KIT_CATALOG_ENTRY_HEADER(rotZSep);
  SO_KIT_CATALOG_ENTRY_HEADER(rotZ);
  SO_KIT_CATALOG_ENTRY_HEADER(yTranslatorSwitch);
  SO_KIT_CATALOG_ENTRY_HEADER(yTranslator);

  SO_KIT_CATALOG_ENTRY_HEADER(xFeedbackSwitch);
  SO_KIT_CATALOG_ENTRY_HEADER(xFeedbackSep);
  SO_KIT_CATALOG_ENTRY_HEADER(xFeedbackTranslation);
  SO_KIT_CATALOG_ENTRY_HEADER(xFeedback);

  SO_KIT_CATALOG_ENTRY_HEADER(yFeedbackSwitch);
  SO_KIT_CATALOG_ENTRY_HEADER(yFeedbackSep);
  SO_KIT_CATALOG_ENTRY_HEADER(yFeedbackTranslation);
  SO_KIT_CATALOG_ENTRY_HEADER(yFeedback);

  SO_KIT_CATALOG_ENTRY_HEADER(zFeedbackSwitch);
  SO_KIT_CATALOG_ENTRY_HEADER(zFeedbackSep);
  SO_KIT_CATALOG_ENTRY_HEADER(zFeedbackTranslation);
  SO_KIT_CATALOG_ENTRY_HEADER(zFeedback);

  SO_KIT_CATALOG_ENTRY_HEADER(planeFeedbackSep);
  SO_KIT_CATALOG_ENTRY_HEADER(planeFeedbackTranslation);
  SO_KIT_CATALOG_ENTRY_HEADER(planeFeedbackSwitch);
  SO_KIT_CATALOG_ENTRY_HEADER(yzFeedback);
  SO_KIT_CATALOG_ENTRY_HEADER(xzFeedback);
  SO_KIT_CATALOG_ENTRY_HEADER(xyFeedback);

 public:
  SoDragPointDragger();

  SoSFVec3f translation;

 public:
  void    setJumpLimit(float limit)   { jumpLimit = limit; }
  float   getJumpLimit() const        { return jumpLimit; }

  void showNextDraggerSet();

  enum DraggerSet {
    /*
     * X axis dragger set (x-line/yz-plane)
     */
    X_AXIS,
    /*
     * Y axis dragger set (y-line/xz-plane)
     */
    Y_AXIS,
    /*
     * Z axis dragger set (z-line/xy-plane)
     */
    Z_AXIS
  };

  void showDraggerSet( DraggerSet set );

 private:
  static void         initClass();    // initialize the class
  static void         exitClass();

 private:

  static void startCB( void *, SoDragger * );
  static void motionCB( void *, SoDragger * );
  static void finishCB( void *, SoDragger * );

  SoFieldSensor *fieldSensor;
  static void fieldSensorCB( void *, SoSensor * );
  static void valueChangedCB( void *, SoDragger * );

  static void metaKeyChangeCB( void *, SoDragger *);

  void        dragStart();
  void        drag();
  void        dragFinish();
    
  // detach/attach any sensors, callbacks, and/or field connections.
  // Also set geometry of childDraggers to be our default instead of their
  // regular default, using our resources.
  // Called by:            start/end of SoBaseKit::readInstance
  // and on new copy by:   start/end of SoBaseKit::copy.
  // Classes that redefine must call setUpConnections(TRUE,TRUE) 
  // at end of constructor.
  // Returns the state of the node when this was called.
  virtual SbBool setUpConnections( SbBool onOff, SbBool doItAlways = FALSE );

  virtual void setDefaultOnNonWritingFields();

  virtual ~SoDragPointDragger();

 private:
    
  SoDragger *currentDragger;
  SbVec3f    startLocalHitPt;

  SbBool          shftDown;  // used to keep track of if meta key is down.

  // The box defining the area where the feedback appears.
  // This box stays still in world space whil the dragger is moved.
  // But when the dragger gets too close to the edge, it jumps over
  // to define a new box.
  // Limit box in local space preserves size of box even when world
  // space coordinates are very large (small box dimensions could be
  // lost because of limited floating point precision).
  SbBox3f     limitBox;
  SbBox3f     localLimitBox;
    
  // when to jump
  float       jumpLimit;

  // sets the feedback geometry based on the level of
  // constraints
  void        setFeedbackGeometry();

  // checks the limit box and extends it if necessary
  void        checkBoxLimits();

  // Sets the offsetWorkLimit box and updates the feedback geometry 
  void  updateLimitBoxAndFeedback();

  static const char geomBuffer[];

  SoGetBoundingBoxAction* bba;

  //  Cached values to make updating feedback more efficient
  SoNode *oldXAxisNode;
  SoNode *oldYAxisNode;
  SoNode *oldZAxisNode;

};

#endif  /* _SO_DRAGPOINT_DRAGGER_ */

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Open Inventor Toolkit reference manual, generated on 12 Feb 2024
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