SoDragger(3)

NAME
SoDragger - The SoDragger class is the base class for all draggers.

SYNOPSIS

#include <Inventor/draggers/SoDragger.h>

Inherits SoInteractionKit.

Inherited by SoCenterballDragger, SoDirectionalLightDragger, SoDragPointDragger, SoHandleBoxDragger, SoJackDragger, SoPointLightDragger, SoRotateCylindricalDragger, SoRotateDiscDragger, SoRotateSphericalDragger, SoScale1Dragger, SoScale2Dragger, SoScale2UniformDragger, SoScaleUniformDragger, SoSpotLightDragger, SoTabBoxDragger, SoTabPlaneDragger, SoTrackballDragger, SoTransformBoxDragger, SoTransformerDragger, SoTranslate1Dragger, and SoTranslate2Dragger.

  Public Types
enum ProjectorFrontSetting { FRONT, BACK, USE_PICK }
Public Types inherited from SoInteractionKit
enum CacheEnabled { OFF, ON, AUTO }
Public Types inherited from SoNode
enum NodeType { INVENTOR = 0x0000, VRML1 = 0x0001, VRML2 = 0x0002, INVENTOR_1 = 0x0004, INVENTOR_2_0 = 0x0008, INVENTOR_2_1 = 0x0010, INVENTOR_2_5 = 0x0020, INVENTOR_2_6 = 0x0040, COIN_1_0 = 0x0080, COIN_2_0 = 0x0100, EXTENSION = 0x0200, COIN_2_2 = 0x0400, COIN_2_3 = 0x0800, COIN_2_4 = 0x1000, INVENTOR_5_0 = 0x2000, COIN_2_5 = 0x4000, COIN_3_0 = 0x8000, INVENTOR_6_0 = 0x10000, COIN_4_0 = 0x20000 }

  Public Member Functions
virtual SoType getTypeId (void) const
virtual const SoNodekitCatalog * getNodekitCatalog (void) const
virtual void callback (SoCallbackAction *action)
virtual void GLRender (SoGLRenderAction *action)
virtual void getMatrix (SoGetMatrixAction *action)
virtual void rayPick (SoRayPickAction *action)
virtual void search (SoSearchAction *action)
virtual void write (SoWriteAction *action)
virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)
void setProjectorEpsilon (const float epsilon)
float getProjectorEpsilon (void) const
void addStartCallback (SoDraggerCB *func, void *data=NULL)
void removeStartCallback (SoDraggerCB *func, void *data=NULL)
void addMotionCallback (SoDraggerCB *func, void *data=NULL)
void removeMotionCallback (SoDraggerCB *func, void *data=NULL)
void addFinishCallback (SoDraggerCB *func, void *data=NULL)
void removeFinishCallback (SoDraggerCB *func, void *data=NULL)
void addValueChangedCallback (SoDraggerCB *func, void *data=NULL)
void removeValueChangedCallback (SoDraggerCB *func, void *data=NULL)
void setMinGesture (int pixels)
int getMinGesture (void) const
SbBool enableValueChangedCallbacks (SbBool newval)
const SbMatrix & getMotionMatrix (void)
void addOtherEventCallback (SoDraggerCB *func, void *data=NULL)
void removeOtherEventCallback (SoDraggerCB *func, void *data=NULL)
void registerChildDragger (SoDragger *child)
void unregisterChildDragger (SoDragger *child)
void registerChildDraggerMovingIndependently (SoDragger *child)
void unregisterChildDraggerMovingIndependently (SoDragger *child)
SbMatrix getLocalToWorldMatrix (void)
SbMatrix getWorldToLocalMatrix (void)
SbVec3f getLocalStartingPoint (void)
SbVec3f getWorldStartingPoint (void)
void getPartToLocalMatrix (const SbName &partname, SbMatrix &parttolocalmatrix, SbMatrix &localtopartmatrix)
void transformMatrixLocalToWorld (const SbMatrix &frommatrix, SbMatrix &tomatrix)
void transformMatrixWorldToLocal (const SbMatrix &frommatrix, SbMatrix &tomatrix)
void transformMatrixToLocalSpace (const SbMatrix &frommatrix, SbMatrix &tomatrix, const SbName &fromspacepartname)
virtual void setMotionMatrix (const SbMatrix &newmatrix)
void valueChanged (void)
const SbMatrix & getStartMotionMatrix (void)
virtual void saveStartParameters (void)
const SoPath * getPickPath (void) const
const SoEvent * getEvent (void) const
SoPath * createPathToThis (void)
const SoPath * getSurrogatePartPickedOwner (void) const
const SbName & getSurrogatePartPickedName (void) const
const SoPath * getSurrogatePartPickedPath (void) const
void setStartingPoint (const SoPickedPoint *newpoint)
void setStartingPoint (const SbVec3f &newpoint)
const SbViewVolume & getViewVolume (void)
void setViewVolume (const SbViewVolume &vol)
const SbViewportRegion & getViewportRegion (void)
void setViewportRegion (const SbViewportRegion &reg)
SoHandleEventAction * getHandleEventAction (void) const
void setHandleEventAction (SoHandleEventAction *newAction)
void setTempPathToThis (const SoPath *somethingclose)
virtual void grabEventsSetup (void)
virtual void grabEventsCleanup (void)
void workFieldsIntoTransform (SbMatrix &mtx)
void setFrontOnProjector (ProjectorFrontSetting newval)
ProjectorFrontSetting getFrontOnProjector (void) const
Public Member Functions inherited from SoInteractionKit
SoInteractionKit (void)
virtual SbBool setPartAsPath (const SbName &partname, SoPath *path)
virtual SbBool setPartAsDefault (const SbName &partname, SoNode *node, SbBool onlyifdefault=TRUE)
virtual SbBool setPartAsDefault (const SbName &partname, const SbName &nodename, SbBool onlyifdefault=TRUE)
SbBool isPathSurrogateInMySubgraph (const SoPath *path, SoPath *&pathToOwner, SbName &surrogatename, SoPath *&surrogatepath, SbBool fillargs=TRUE)
SbBool isPathSurrogateInMySubgraph (const SoPath *path)
virtual SbBool setPart (const SbName &partname, SoNode *from)
Public Member Functions inherited from SoBaseKit
SoBaseKit (void)
virtual SoNode * getPart (const SbName &partname, SbBool makeifneeded)
SbString getPartString (const SoBase *part)
virtual SoNodeKitPath * createPathToPart (const SbName &partname, SbBool makeifneeded, const SoPath *pathtoextend=NULL)
SbBool set (const char *namevaluepairliststring)
SbBool set (const char *partnamestring, const char *parameterstring)
virtual void doAction (SoAction *action)
virtual SoChildList * getChildren (void) const
void printDiagram (void)
void printSubDiagram (const SbName &rootname, int level)
void printTable (void)
virtual void addWriteReference (SoOutput *out, SbBool isfromfield=FALSE)
SbBool forceChildDrivenWriteRefs (SoOutput *out)
Public Member Functions inherited from SoNode
void setOverride (const SbBool state)
SbBool isOverride (void) const
void setNodeType (const NodeType type)
NodeType getNodeType (void) const
virtual SoNode * copy (SbBool copyconnections=FALSE) const
virtual SbBool affectsState (void) const
virtual void GLRenderBelowPath (SoGLRenderAction *action)
virtual void GLRenderInPath (SoGLRenderAction *action)
virtual void GLRenderOffPath (SoGLRenderAction *action)
virtual void pick (SoPickAction *action)
virtual void audioRender (SoAudioRenderAction *action)
virtual void startNotify (void)
virtual void notify (SoNotList *l)
SbUniqueId getNodeId (void) const
virtual void writeInstance (SoOutput *out)
virtual SoFieldContainer * copyThroughConnection (void) const
Public Member Functions inherited from SoFieldContainer
void setToDefaults (void)
SbBool hasDefaultValues (void) const
SbBool fieldsAreEqual (const SoFieldContainer *container) const
void copyFieldValues (const SoFieldContainer *container, SbBool copyconnections=FALSE)
SbBool set (const char *const fielddata)
void get (SbString &fielddata)
virtual int getFields (SoFieldList &l) const
virtual int getAllFields (SoFieldList &l) const
virtual SoField * getField (const SbName &name) const
virtual SoField * getEventIn (const SbName &name) const
virtual SoField * getEventOut (const SbName &name) const
SbBool getFieldName (const SoField *const field, SbName &name) const
SbBool enableNotify (const SbBool flag)
SbBool isNotifyEnabled (void) const
SbBool set (const char *fielddata, SoInput *input)
void get (SbString &fielddata, SoOutput *out)
virtual SbBool validateNewFieldValue (SoField *field, void *newval)
SbBool getIsBuiltIn (void) const
virtual void getFieldsMemorySize (size_t &managed, size_t &unmanaged) const
void setUserData (void *userdata) const
void * getUserData (void) const
Public Member Functions inherited from SoBase
void ref (void) const
void unref (void) const
void unrefNoDelete (void) const
int32_t getRefCount (void) const
void touch (void)
SbBool isOfType (SoType type) const
Returns TRUE if the type of this object is either of the same type or inherited from type.
virtual SbName getName (void) const
virtual void setName (const SbName &newname)
void addAuditor (void *const auditor, const SoNotRec::Type type)
void removeAuditor (void *const auditor, const SoNotRec::Type type)
const SoAuditorList & getAuditors (void) const
SbBool shouldWrite (void)
void assertAlive (void) const

  Static Public Member Functions
static SoType getClassTypeId (void)
static const SoNodekitCatalog * getClassNodekitCatalog (void)
static void setMinScale (float newminscale)
static float getMinScale (void)
static void workValuesIntoTransform (SbMatrix &mtx, const SbVec3f *translationptr, const SbRotation *rotationptr, const SbVec3f *scalefactorptr, const SbRotation *scaleorientationptr, const SbVec3f *centerptr)
static void getTransformFast (SbMatrix &mtx, SbVec3f &translation, SbRotation &rotation, SbVec3f &scalefactor, SbRotation &scaleorientation, const SbVec3f &center)
static void getTransformFast (SbMatrix &mtx, SbVec3f &translation, SbRotation &rotation, SbVec3f &scalefactor, SbRotation &scaleorientation)
static SbMatrix appendTranslation (const SbMatrix &mtx, const SbVec3f &translation, const SbMatrix *conversion=NULL)
static SbMatrix appendScale (const SbMatrix &mtx, const SbVec3f &scale, const SbVec3f &scalecenter, const SbMatrix *conversion=NULL)
static SbMatrix appendRotation (const SbMatrix &mtx, const SbRotation &rot, const SbVec3f &rotcenter, const SbMatrix *conversion=NULL)
static void initClass (void)
static void initClasses (void)
Static Public Member Functions inherited from SoInteractionKit
static SoType getClassTypeId (void)
static const SoNodekitCatalog * getClassNodekitCatalog (void)
static void initClass (void)
Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.
static void setSwitchValue (SoNode *node, const int newVal)
Static Public Member Functions inherited from SoBaseKit
static SoType getClassTypeId (void)
static void initClass (void)
static const SoNodekitCatalog * getClassNodekitCatalog (void)
static SbBool isSearchingChildren (void)
static void setSearchingChildren (const SbBool newval)
Static Public Member Functions inherited from SoNode
static uint32_t getCompatibilityTypes (const SoType &nodetype)
static SoType getClassTypeId (void)
static SoNode * getByName (const SbName &name)
static int getByName (const SbName &name, SoNodeList &l)
static void initClass (void)
Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.
static void initClasses (void)
static SbUniqueId getNextNodeId (void)
static int getActionMethodIndex (const SoType type)
static void getBoundingBoxS (SoAction *action, SoNode *node)
static void GLRenderS (SoAction *action, SoNode *node)
static void callbackS (SoAction *action, SoNode *node)
static void getMatrixS (SoAction *action, SoNode *node)
static void handleEventS (SoAction *action, SoNode *node)
static void pickS (SoAction *action, SoNode *node)
static void rayPickS (SoAction *action, SoNode *node)
static void searchS (SoAction *action, SoNode *node)
static void writeS (SoAction *action, SoNode *node)
static void audioRenderS (SoAction *action, SoNode *node)
static void getPrimitiveCountS (SoAction *action, SoNode *node)
Static Public Member Functions inherited from SoFieldContainer
static void initClass (void)
Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.
static SoType getClassTypeId (void)
This static method returns the SoType object associated with objects of this class.
static void cleanupClass (void)
static void initCopyDict (void)
static void addCopy (const SoFieldContainer *orig, const SoFieldContainer *copy)
static SoFieldContainer * checkCopy (const SoFieldContainer *orig)
static SoFieldContainer * findCopy (const SoFieldContainer *orig, const SbBool copyconnections)
static void copyDone (void)
Static Public Member Functions inherited from SoBase
static void initClass (void)
Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.
static SoType getClassTypeId (void)
This static method returns the SoType object associated with objects of this class.
static void addName (SoBase *const base, const char *const name)
static void removeName (SoBase *const base, const char *const name)
static void incrementCurrentWriteCounter (void)
static void decrementCurrentWriteCounter (void)
static SoBase * getNamedBase (const SbName &name, SoType type)
static int getNamedBases (const SbName &name, SoBaseList &baselist, SoType type)
static SbBool read (SoInput *input, SoBase *&base, SoType expectedtype)
static void setInstancePrefix (const SbString &c)
static void setTraceRefs (SbBool trace)
static SbBool getTraceRefs (void)
static SbBool connectRoute (SoInput *input, const SbName &fromnodename, const SbName &fromfieldname, const SbName &tonodename, const SbName &tofieldname)
static SbBool readRoute (SoInput *input)

  Public Attributes
SoSFBool isActive
Public Attributes inherited from SoInteractionKit
SoSFEnum renderCaching
SoSFEnum boundingBoxCaching
SoSFEnum renderCulling
SoSFEnum pickCulling

  Protected Member Functions
virtual const SoFieldData * getFieldData (void) const
SoDragger (void)
virtual ~SoDragger (void)
SbVec2f getNormalizedLocaterPosition (void)
SbVec2s getLocaterPosition (void)
SbVec2s getStartLocaterPosition (void) const
void setStartLocaterPosition (SbVec2s p)
SbBool isAdequateConstraintMotion (void)
virtual SbBool shouldGrabBasedOnSurrogate (const SoPath *pickpath, const SoPath *surrogatepath)
void setCameraInfo (SoAction *action)
virtual void handleEvent (SoHandleEventAction *ha)
void transferMotion (SoDragger *child)
void setIgnoreInBbox (SbBool newval)
SbBool isIgnoreInBbox (void)
virtual void getBoundingBox (SoGetBoundingBoxAction *action)
void setActiveChildDragger (SoDragger *newchilddragger)
SoDragger * getActiveChildDragger (void) const
virtual void setDefaultOnNonWritingFields (void)
void updateDraggerCache (const SoPath *path)
virtual const SoPickedPoint * getPickedPointForStart (SoHandleEventAction *action)
Protected Member Functions inherited from SoInteractionKit
virtual ~SoInteractionKit ()
virtual void copyContents (const SoFieldContainer *fromFC, SbBool copyConnections)
virtual SbBool setPart (const int partNum, SoNode *node)
virtual SbBool readInstance (SoInput *in, unsigned short flags)
virtual SbBool setAnyPartAsDefault (const SbName &partname, SoNode *node, SbBool anypart=TRUE, SbBool onlyifdefault=TRUE)
virtual SbBool setAnyPartAsDefault (const SbName &partname, const SbName &nodename, SbBool anypart=TRUE, SbBool onlyifdefault=TRUE)
SbBool setAnySurrogatePath (const SbName &name, SoPath *path, SbBool leafcheck=FALSE, SbBool publiccheck=FALSE)
virtual SbBool setUpConnections (SbBool onoff, SbBool doitalways=FALSE)
void connectSeparatorFields (SoSeparator *dest, SbBool onOff)
Protected Member Functions inherited from SoBaseKit
virtual ~SoBaseKit ()
virtual SoNode * addToCopyDict (void) const
SoGroup * getContainerNode (const SbName &listname, SbBool makeifneeded=TRUE)
virtual SoNode * getAnyPart (const SbName &partname, SbBool makeifneeded, SbBool leafcheck=FALSE, SbBool publiccheck=FALSE)
virtual SoNodeKitPath * createPathToAnyPart (const SbName &partname, SbBool makeifneeded, SbBool leafcheck=FALSE, SbBool publiccheck=FALSE, const SoPath *pathtoextend=NULL)
virtual SbBool setAnyPart (const SbName &partname, SoNode *from, SbBool anypart=TRUE)
void createNodekitPartsList (void)
void createFieldList (void)
virtual void createDefaultParts (void)
const SoNodekitParts * getNodekitPartsList (void) const
const SbList< SoSFNode * > & getCatalogInstances (void) const
void catalogError (void)
void countMyFields (SoOutput *out)
Protected Member Functions inherited from SoNode
SoNode (void)
virtual ~SoNode ()
Protected Member Functions inherited from SoFieldContainer
SoFieldContainer (void)
virtual ~SoFieldContainer ()
Protected Member Functions inherited from SoBase
SoBase (void)
virtual ~SoBase ()
virtual void destroy (void)
SbBool hasMultipleWriteRefs (void) const
SbBool writeHeader (SoOutput *out, SbBool isgroup, SbBool isengine) const
void writeFooter (SoOutput *out) const
virtual const char * getFileFormatName (void) const
virtual SoNotRec createNotRec (void)

  Static Protected Member Functions
static const SoFieldData ** getFieldDataPtr (void)
static const SoNodekitCatalog ** getClassNodekitCatalogPtr (void)
static void childTransferMotionAndValueChangedCB (void *, SoDragger *)
static void childValueChangedCB (void *, SoDragger *)
static void childStartCB (void *, SoDragger *)
static void childMotionCB (void *, SoDragger *)
static void childFinishCB (void *, SoDragger *)
static void childOtherEventCB (void *, SoDragger *)
Static Protected Member Functions inherited from SoInteractionKit
static const SoFieldData ** getFieldDataPtr (void)
static const SoNodekitCatalog ** getClassNodekitCatalogPtr (void)
static void readDefaultParts (const char *fileName, const char defaultBuffer[], int defBufSize)
static void fieldSensorCB (void *, SoSensor *)
Static Protected Member Functions inherited from SoBaseKit
static const SoFieldData ** getFieldDataPtr (void)
static const SoNodekitCatalog ** getClassNodekitCatalogPtr (void)
Static Protected Member Functions inherited from SoNode
static const SoFieldData ** getFieldDataPtr (void)
static void setNextActionMethodIndex (int index)
static int getNextActionMethodIndex (void)
static void incNextActionMethodIndex (void)
static void setCompatibilityTypes (const SoType &nodetype, const uint32_t bitmask)
Static Protected Member Functions inherited from SoBase
static uint32_t getCurrentWriteCounter (void)
static void staticDataLock (void)
static void staticDataUnlock (void)

  Protected Attributes
SoSFNode motionMatrix
Protected Attributes inherited from SoInteractionKit
SoSFNode geomSeparator
SoSFNode topSeparator
SoFieldSensor * fieldSensor
SoSeparator * oldTopSep
Protected Attributes inherited from SoBaseKit
SoSFNode callbackList
SoChildList * children
SbBool connectionsSetUp
Protected Attributes inherited from SoNode
SbUniqueId uniqueId
Protected Attributes inherited from SoFieldContainer
SbBool isBuiltIn

  Additional Inherited Members
Protected Types inherited from SoBase
enum BaseFlags { IS_ENGINE = 0x01, IS_GROUP = 0x02 }
Static Protected Attributes inherited from SoNode
static SbUniqueId nextUniqueId = 1
static int nextActionMethodIndex = 0

Detailed Description

The SoDragger class is the base class for all draggers. Draggers is a mechanism used for letting the end-users of your application code interact with elements in 3D, by scaling, rotating or translating geometry or other instances in the scene (like cameras or light sources).

For a very thorough introduction and tutorial to the dragger classes and general concepts, we advise you to consult The Inventor Mentor, ISBN 0-201-62495-8, chapter 15.

This is the common superclass for all dragger classes.

It holds the current motion matrix, and offers lots of convenience methods to build from for its subclasses -- that is, the non-abstract dragger classes to use as nodes in your scene graph.

The motion matrix is used to modify the model matrix during traversal, and this is a common dragger mechanism -- all draggers should update this during dragging.

A number of the Coin dragger classes have built-in convenience wrapper classes, called manipulators. See for instance the SoTrackballDragger / SoTrackballManip pair.

The matching manipulator class for any dragger class has basically two convenient additions to the functionality of the standalone dragger: 1) it makes swapping the dragger in and out of the scene graph very straightforward (something which is often done for draggers in 3D user interfaces), 2) it wraps up the dragger with SoSurroundScale and SoAntiSquish nodes where applicable, so the dragger geometry automatically scales up or down to match the geometry it influences.

This last functionality can also be duplicated in a rather straightforward manner outside of the context of a manipulator, as can be seen from the usage example in the SoSurroundScale class documentation.

The appearance of draggers can be modified by either using the SoDragger::setPart() method (see usage example below) or by setting up external Inventor-format files which the geometry parts are read from. The latter method can be done by setting the environment variable SO_DRAGGER_DIR to point to a directory with replacement geometry files. The name of the new files and the name of the nodes / sub-graphs with the replacement geometries must follow a rigid scheme. We advise you to look at the Coin source code directory Coin/data/draggerDefaults/ to see how the replacement geometry files should be named. Setting SO_DRAGGER_DIR to this directory and modifying the files there provides a convenient way to play around with new dragger geometry arrangements.

As mentioned above, SoDragger::setPart() can be used to modify the appearance of a dragger by changing its default geometry. One common technique is for instance to take advantage of this to use only parts of a dragger, by replacing / disabling the geometry that you don't want the end-user to interact with. The following code example shows how to remove the translation functionality of the SoTransformBoxDragger:

#include <Inventor/Qt/SoQt.h>
#include <Inventor/Qt/viewers/SoQtExaminerViewer.h>
#include <Inventor/draggers/SoTransformBoxDragger.h>
#include <Inventor/nodes/SoSeparator.h>
int
main(int argc, char ** argv)
{
  QWidget * window = SoQt::init(argv[0]);
  SoTransformBoxDragger * dragger = new SoTransformBoxDragger;
  SbString str;
  for (int i = 1; i <= 6; i++) {
    str.sprintf("translator%d.translator", i);
    dragger->setPart(str.getString(), new SoSeparator);
  }
  SoQtExaminerViewer * viewer = new SoQtExaminerViewer(window);
  viewer->setSceneGraph(dragger);
  viewer->show();
  SoQt::show(window);
  SoQt::mainLoop();
  delete viewer;
  return 0;
}

Draggers are also node kits, and below is the catalog structure for this top-level dragger class.

Nodekit structure (new entries versus parent class marked with arrow prefix):

CLASS SoDragger
-->"this"
      "callbackList"
      "topSeparator"
-->      "motionMatrix"
         "geomSeparator"

(See SoBaseKit::printDiagram() for information about the output formatting.)

Detailed information on catalog parts:

CLASS SoDragger
PVT   "this",  SoDragger  ---
      "callbackList",  SoNodeKitListPart [ SoCallback, SoEventCallback ]
PVT   "topSeparator",  SoSeparator  ---
PVT   "motionMatrix",  SoMatrixTransform  ---
PVT   "geomSeparator",  SoSeparator  ---

(See SoBaseKit::printTable() for information about the output formatting.)

Member Enumeration Documentation

  enum SoDragger::ProjectorFrontSetting
Holds various settings for projectors, which might affect cylindrical and spherical based draggers. Specifies whether dragging should be based on the front or back of the sphere / cylinder, or if the picked point should be used to decide this.

Enumerator

FRONT
    Always use front of projector.

BACK
    Always use back of projector.

USE_PICK
    Use picked point to decide front or back of projector.

Constructor & Destructor Documentation

  SoDragger::SoDragger (void ) [protected]
A protected constructor for this abstract superclass for all Coin draggers.

  SoDragger::~SoDragger (void ) [protected], [virtual]
Virtual protected destructor.

Member Function Documentation

  SoType SoDragger::getClassTypeId (void ) [static]
This static method returns the SoType object associated with objects of this class.

  SoType SoDragger::getTypeId (void ) const [virtual]
Returns the type identification of an object derived from a class inheriting SoBase. This is used for runtime type checking and "downward" casting.

Reimplemented from SoInteractionKit.

Reimplemented in SoCenterballDragger, SoDirectionalLightDragger, SoDragPointDragger, SoHandleBoxDragger, SoJackDragger, SoPointLightDragger, SoRotateCylindricalDragger, SoRotateDiscDragger, SoRotateSphericalDragger, SoScale1Dragger, SoScale2Dragger, SoScale2UniformDragger, SoScaleUniformDragger, SoSpotLightDragger, SoTabBoxDragger, SoTabPlaneDragger, SoTrackballDragger, SoTransformBoxDragger, SoTransformerDragger, SoTranslate1Dragger, and SoTranslate2Dragger.

  const SoFieldData ** SoDragger::getFieldDataPtr (void ) [static], [protected]
This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.
 Returns the SoFieldData class which holds information about fields in this node.

  const SoFieldData * SoDragger::getFieldData (void ) const [protected], [virtual]
Returns a pointer to the class-wide field data storage object for this instance. If no fields are present, returns NULL.

Reimplemented from SoInteractionKit.

Reimplemented in SoCenterballDragger, SoDirectionalLightDragger, SoDragPointDragger, SoHandleBoxDragger, SoJackDragger, SoPointLightDragger, SoRotateCylindricalDragger, SoRotateDiscDragger, SoRotateSphericalDragger, SoScale1Dragger, SoScale2Dragger, SoScale2UniformDragger, SoScaleUniformDragger, SoSpotLightDragger, SoTabBoxDragger, SoTabPlaneDragger, SoTrackballDragger, SoTransformBoxDragger, SoTransformerDragger, SoTranslate1Dragger, and SoTranslate2Dragger.

  const SoNodekitCatalog * SoDragger::getClassNodekitCatalog (void ) [static]
Returns the nodekit catalog which defines the layout of this class' kit.

  const SoNodekitCatalog * SoDragger::getNodekitCatalog (void ) const [virtual]
Returns the nodekit catalog which defines the layout of this class' kit.

Reimplemented from SoInteractionKit.

Reimplemented in SoCenterballDragger, SoDirectionalLightDragger, SoDragPointDragger, SoHandleBoxDragger, SoJackDragger, SoPointLightDragger, SoRotateCylindricalDragger, SoRotateDiscDragger, SoRotateSphericalDragger, SoScale1Dragger, SoScale2Dragger, SoScale2UniformDragger, SoScaleUniformDragger, SoSpotLightDragger, SoTabBoxDragger, SoTabPlaneDragger, SoTrackballDragger, SoTransformBoxDragger, SoTransformerDragger, SoTranslate1Dragger, and SoTranslate2Dragger.

  const SoNodekitCatalog ** SoDragger::getClassNodekitCatalogPtr (void ) [static], [protected]
Returns the pointer to the pointer of the nodekit catalog for this class.

  void SoDragger::callback (SoCallbackAction * action) [virtual]
Action method for SoCallbackAction.

Simply updates the state according to how the node behaves for the render action, so the application programmer can use the SoCallbackAction for extracting information about the scene graph.

Reimplemented from SoBaseKit.

  void SoDragger::GLRender (SoGLRenderAction * action) [virtual]
Action method for the SoGLRenderAction.

This is called during rendering traversals. Nodes influencing the rendering state in any way or want to throw geometry primitives at OpenGL override this method.

Reimplemented from SoBaseKit.

Reimplemented in SoTabPlaneDragger.

  void SoDragger::getMatrix (SoGetMatrixAction * action) [virtual]
Action method for SoGetMatrixAction.

Updates action by accumulating with the transformation matrix of this node (if any).

Reimplemented from SoBaseKit.

Reimplemented in SoCenterballDragger.

  void SoDragger::rayPick (SoRayPickAction * action) [virtual]
Action method for SoRayPickAction.

Checks the ray specification of the action and tests for intersection with the data of the node.

Nodes influencing relevant state variables for how picking is done also override this method.

Reimplemented from SoBaseKit.

  void SoDragger::search (SoSearchAction * action) [virtual]
Action method for SoSearchAction.

Compares the search criteria from the action to see if this node is a match. Searching is done by matching up all criteria set up in the SoSearchAction -- if any of the requested criteria is a miss, the search is not deemed successful for the node.

See also
    SoSearchAction

Reimplemented from SoBaseKit.

  void SoDragger::write (SoWriteAction * action) [virtual]
Action method for SoWriteAction.

Writes out a node object, and any connected nodes, engines etc, if necessary.

Reimplemented from SoBaseKit.

  void SoDragger::getPrimitiveCount (SoGetPrimitiveCountAction * action) [virtual]
Action method for the SoGetPrimitiveCountAction.

Calculates the number of triangle, line segment and point primitives for the node and adds these to the counters of the action.

Nodes influencing how geometry nodes calculate their primitive count also override this method to change the relevant state variables.

Reimplemented from SoBaseKit.

  void SoDragger::setProjectorEpsilon (const float epsilon)
Sets the epsilon used for restricting the draggers when the intersection line is almost parallel with the projector direction.

For line projectors this is based on the dot product between the picking ray and the projector line. For plane projector, the dot product between the plane normal and the picking ray is used.

Default value is 0.0.

Since
    Coin 3.0

  void SoDragger::addStartCallback (SoDraggerCB * func, void * data = NULL)
Adds a callback which is called at the start of a drag, after the mouse button 1 is pressed, and dragger is picked.

  void SoDragger::removeStartCallback (SoDraggerCB * func, void * data = NULL)
Removes a previously registered start callback.

See also
    addStartCallback()

  void SoDragger::addMotionCallback (SoDraggerCB * func, void * data = NULL)
Adds a callback which is called for each mouse movement during dragging.

  void SoDragger::removeMotionCallback (SoDraggerCB * func, void * data = NULL)
Removes a previously registered motion callback.

See also
    addMotionCallback()

  void SoDragger::addFinishCallback (SoDraggerCB * func, void * data = NULL)
Adds a callback which is called after dragging is finished.

  void SoDragger::removeFinishCallback (SoDraggerCB * func, void * data = NULL)
Removes a finish callback.

See also
    addFinishCallback()

  void SoDragger::addValueChangedCallback (SoDraggerCB * func, void * data = NULL)
Adds a callback which is called after a dragger has changed a field. It is not called if the SoDragger::isActive field is changed.

See also
    enableValueChangedCallback()

  void SoDragger::removeValueChangedCallback (SoDraggerCB * func, void * data = NULL)
Removes a value changed callback.

See also
    addValueChangedCallback()

  void SoDragger::setMinGesture (int pixels)
Sets the number of pixel movement needed to trigger a constraint gesture. Default is 8 pixels.

  int SoDragger::getMinGesture (void ) const
Returns the gesture pixels threshold value.

See also
    setMinGesture()

  SbBool SoDragger::enableValueChangedCallbacks (SbBool val)
Enable or disable "value changed" callbacks.

See also
    addValueChangedCallback()

  const SbMatrix & SoDragger::getMotionMatrix (void )
Returns the motion matrix for this dragger.

  void SoDragger::addOtherEventCallback (SoDraggerCB * func, void * data = NULL)
Adds an event callback for events other then drag events. As soon as dragging starts, the dragger grabs all events (until mouse button is released). This method can be used to handle other events during dragging.

  void SoDragger::removeOtherEventCallback (SoDraggerCB * func, void * data = NULL)
Removes a other event callback.

See also
    addOtherEventCallback()

  void SoDragger::registerChildDragger (SoDragger * child)
Should be called by compound draggers to register child draggers.

  void SoDragger::unregisterChildDragger (SoDragger * child)
Should be called by compound draggers to unregister child draggers.

  void SoDragger::registerChildDraggerMovingIndependently (SoDragger * child)
Should be called by compound draggers to register child draggers that should move independently of their parent.

  void SoDragger::unregisterChildDraggerMovingIndependently (SoDragger * child)
Should be called by compound draggers to unregister child draggers.

See also
    registerChildDraggerMovingIndependently()

  SbMatrix SoDragger::getLocalToWorldMatrix (void )
Returns a matrix that converts from local to world space.

  SbMatrix SoDragger::getWorldToLocalMatrix (void )
Returns a matrix that converts from world to local space.

  SbVec3f SoDragger::getLocalStartingPoint (void )
Returns the drag starting point in the local coordinate system.

  SbVec3f SoDragger::getWorldStartingPoint (void )
Returns the drag starting point in the world coordinate system.

  void SoDragger::getPartToLocalMatrix (const SbName & partname, SbMatrix & parttolocalmatrix, SbMatrix & localtopartmatrix)
Returns matrices that will convert between local space and the space in which partname lies in.

  void SoDragger::transformMatrixLocalToWorld (const SbMatrix & frommatrix, SbMatrix & tomatrix)
Convenience method that transforms the local frommatrix to a world coordinate systems matrix.

  void SoDragger::transformMatrixWorldToLocal (const SbMatrix & frommatrix, SbMatrix & tomatrix)
Convenience method that transforms the world frommatrix to a local coordinate systems matrix.

  void SoDragger::transformMatrixToLocalSpace (const SbMatrix & frommatrix, SbMatrix & tomatrix, const SbName & fromspacepartname)
Transforms a matrix that lies in the frompartname coordinate system into the local coordinate system.

  void SoDragger::setMotionMatrix (const SbMatrix & matrix) [virtual]
Sets a new current motion matrix for the dragger geometry.

Triggers value changed callbacks if matrix is not equal to the previous motion matrix.

Reimplemented in SoTranslate1Dragger, and SoTranslate2Dragger.

  void SoDragger::valueChanged (void )
Can be called by subclasses to trigger value changed callbacks. This might be needed if a field is changed without changing the motion matrix.

  const SbMatrix & SoDragger::getStartMotionMatrix (void )
Returns the motion matrix as it was when saveStartParameters() was called.

  void SoDragger::saveStartParameters (void ) [virtual]
This is invoked to save start parameters, to enable draggers to calculate relative motion.

Default method in superclass SoDragger just saves the motion matrix, but subclasses should overload this method if other data needs to be saved.

Reimplemented in SoCenterballDragger.

  const SoPath * SoDragger::getPickPath (void ) const
Returns the picked path.

  const SoEvent * SoDragger::getEvent (void ) const
Returns the current event.

  SoPath * SoDragger::createPathToThis (void )
Creates a new path to this dragger. Don't forget to ref() and unref() since this method creates a fresh copy for you.

  const SoPath * SoDragger::getSurrogatePartPickedOwner (void ) const
Returns the path to the SoInteractionKit that holds the current surrogate path.

  const SbName & SoDragger::getSurrogatePartPickedName (void ) const
Returns the name of the path in the SoInteractionKit that holds the current surrogate path.

  const SoPath * SoDragger::getSurrogatePartPickedPath (void ) const
Returns the current surrogate path.

  void SoDragger::setStartingPoint (const SoPickedPoint * point)
Sets the staring point for the drag. point is usually a picked point from a SoRayPickAction.

  void SoDragger::setStartingPoint (const SbVec3f & point)
Sets the starting point for a drag.

  const SbViewVolume & SoDragger::getViewVolume (void )
Return the current view volume.

  void SoDragger::setViewVolume (const SbViewVolume & vv)
Sets the current view volume.

  const SbViewportRegion & SoDragger::getViewportRegion (void )
Returns the current viewport region.

  void SoDragger::setViewportRegion (const SbViewportRegion & vp)
Sets the current viewport region.

  SoHandleEventAction * SoDragger::getHandleEventAction (void ) const
Return the current (most recent) SoHandleEventAction.

  void SoDragger::setHandleEventAction (SoHandleEventAction * action)
Stores a handle event action.

  void SoDragger::setTempPathToThis (const SoPath * somethingclose)
This function is part of the original SGI Inventor 2.1 API, but has not been implemented in Coin as it looks like a function which should probably have been private in Open Inventor.

  void SoDragger::grabEventsSetup (void ) [virtual]
Called when dragger starts grabbing events (mouse button down). Overload if you need to do something extra in your dragger.

See also
    grabEventCleanup()

Reimplemented from SoNode.

  void SoDragger::grabEventsCleanup (void ) [virtual]
Called when dragger stops grabbing events (mouse button up).

See also
    grabEventSetup()

Reimplemented from SoNode.

  void SoDragger::workFieldsIntoTransform (SbMatrix & matrix)
Examines the fields of the dragger, changes the matrix according to those fields and leaves the rest of the matrix as it was. The following field names are supported: translation, scaleFactor, rotation and scaleOrientation.

  void SoDragger::setFrontOnProjector (ProjectorFrontSetting val)
Controls the behaviour of the SbProjector.

  SoDragger::ProjectorFrontSetting SoDragger::getFrontOnProjector (void ) const
Returns the behaviour of the SbProjector.

  void SoDragger::setMinScale (float minscalearg) [static]
Sets the minimum scale value all scale factors are clamped against. This is used in workFieldsIntoTransform(). The default value is 0.01

  float SoDragger::getMinScale (void ) [static]
Returns the minimum scale value.

See also
    setMinScale()

  void SoDragger::workValuesIntoTransform (SbMatrix & matrix, const SbVec3f * translationptr, const SbRotation * rotationptr, const SbVec3f * scalefactorptr, const SbRotation * scaleorientationptr, const SbVec3f * centerptr) [static]
Same as above, but pointers to values are supplied. If a pointer is NULL, the matrix value for that argument is used when reconstructing the matrix.

  void SoDragger::getTransformFast (SbMatrix & matrix, SbVec3f & translation, SbRotation & rotation, SbVec3f & scalefactor, SbRotation & scaleorientation, const SbVec3f & center) [static]
Can be used when there is no scaleorientation. Faster than SoDragger::workValuesIntoTransform().

  void SoDragger::getTransformFast (SbMatrix & matrix, SbVec3f & translation, SbRotation & rotation, SbVec3f & scalefactor, SbRotation & scaleorientation) [static]
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

  SbMatrix SoDragger::appendTranslation (const SbMatrix & matrix, const SbVec3f & translation, const SbMatrix * conversion = NULL) [static]
Returns matrix after translation has been appended. If conversion != NULL it is used to transform translation into the space matrix is defined.

  SbMatrix SoDragger::appendScale (const SbMatrix & matrix, const SbVec3f & scale, const SbVec3f & scalecenter, const SbMatrix * conversion = NULL) [static]
Returns matrix after scale and scalecenter have been appended. If conversion != NULL it is used to transform scale into the space matrix is defined.

  SbMatrix SoDragger::appendRotation (const SbMatrix & matrix, const SbRotation & rot, const SbVec3f & rotcenter, const SbMatrix * conversion = NULL) [static]
Appends rot, around rotcenter, to matrix. If conversion is != NULL, this is used to move the rotation into that coordinate systems before appending the rotation.

  void SoDragger::initClass (void ) [static]
Initializes type system for this dragger class.

Application programmers should usually not have to invoke this method, see documentation of SoInteraction::init().

  void SoDragger::initClasses (void ) [static]
Initializes all built-in draggers.

  SbVec2f SoDragger::getNormalizedLocaterPosition (void ) [protected]
Returns the position of the locater.

  SbVec2s SoDragger::getLocaterPosition (void ) [protected]
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

  SbVec2s SoDragger::getStartLocaterPosition (void ) const [protected]
Returns the position when mouse button 1 was pressed.

  void SoDragger::setStartLocaterPosition (SbVec2s pos) [protected]
The start locater position is automatically set when mouse button 1 goes down, but subclasses can use this method to reset the value.

  SbBool SoDragger::isAdequateConstraintMotion (void ) [protected]
Checks if the mouse pointer has been moved enough after the end-user hit a constraint mode key (which is typically SHIFT, sometimes also CTRL for the built-in draggers) that we should act upon and decide which direction the constraint should be set to.

  SbBool SoDragger::shouldGrabBasedOnSurrogate (const SoPath * pickpath, const SoPath * surrogatepath) [protected], [virtual]
Checks if pickpath contains surrogatepath and returns TRUE if the tail of surrogatepath is before any dragger in pickpath.

  void SoDragger::setCameraInfo (SoAction * action) [protected]
Store data about the current camera in the given action.

  void SoDragger::handleEvent (SoHandleEventAction * action) [protected], [virtual]
Action method for SoHandleEventAction.

Inspects the event data from action, and processes it if it is something which this node should react to.

Nodes influencing relevant state variables for how event handling is done also override this method.

Reimplemented from SoBaseKit.

  void SoDragger::transferMotion (SoDragger * child) [protected]
This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

  void SoDragger::setIgnoreInBbox (SbBool val) [protected]
Sets whether dragger geometry should be ignored when calculating bounding box.

  SbBool SoDragger::isIgnoreInBbox (void ) [protected]
Returns whether dragger geometry should be ignored when calculating bounding box.

  void SoDragger::getBoundingBox (SoGetBoundingBoxAction * action) [protected], [virtual]
Action method for the SoGetBoundingBoxAction.

Calculates bounding box and center coordinates for node and modifies the values of the action to encompass the bounding box for this node and to shift the center point for the scene more towards the one for this node.

Nodes influencing how geometry nodes calculate their bounding box also override this method to change the relevant state variables.

Reimplemented from SoBaseKit.

Reimplemented in SoCenterballDragger.

  void SoDragger::setActiveChildDragger (SoDragger * childdragger) [protected]
This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

  SoDragger * SoDragger::getActiveChildDragger (void ) const [protected]
This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

  void SoDragger::setDefaultOnNonWritingFields (void ) [protected], [virtual]
(Be aware that this method is unlikely to be of interest to the application programmer who does not want to extend the library with new custom nodekits or draggers. If you indeed are writing extensions, see the information in the SoBaseKit class documentation.)

This is a virtual method, and the code in it should call SoField::setDefault() with argument TRUE on part fields that should not be written upon scene graph export operations.

This is typically done when:

1.  field value is NULL and part is NULL by default
2.  it is a leaf SoGroup or SoSeparator node with no children
3.  it is a leaf listpart with no children and an SoGroup or SoSeparator container
4.  it is a non-leaf part and it is of SoGroup type and all fields are at their default values
Subclasses should usually override this to do additional settings for new member fields. From the subclass, do remember to call "upwards" to your superclass' setDefaultOnNonWritingFields() method.
Reimplemented from SoInteractionKit.
Reimplemented in SoCenterballDragger, SoDirectionalLightDragger, SoDragPointDragger, SoHandleBoxDragger, SoJackDragger, SoPointLightDragger, SoSpotLightDragger, SoTabBoxDragger, SoTabPlaneDragger, SoTrackballDragger, SoTransformBoxDragger, and SoTransformerDragger.

  void SoDragger::childTransferMotionAndValueChangedCB (void * data, SoDragger * child) [static], [protected]
This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

  void SoDragger::childValueChangedCB (void * data, SoDragger * child) [static], [protected]
This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

  void SoDragger::childStartCB (void * data, SoDragger * child) [static], [protected]
This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

  void SoDragger::childMotionCB (void * data, SoDragger * child) [static], [protected]
This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

  void SoDragger::childFinishCB (void * data, SoDragger * child) [static], [protected]
This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

  void SoDragger::childOtherEventCB (void * data, SoDragger * child) [static], [protected]
This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

  void SoDragger::updateDraggerCache (const SoPath * path) [protected]
This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

  const SoPickedPoint * SoDragger::getPickedPointForStart (SoHandleEventAction * action) [protected], [virtual]
Interaction with the dragger will be started, if the returned picked point belongs to the dragger. A derived class can override this method to change the condition when the dragger starts interaction, e.g. it can return the picked point on the dragger from the picked point list of the action, even if it is covered by other (semi) transparent objects. The default implementation returns the foremost picked point from the action. This method is not present in Open Inventor.

Member Data Documentation

  SoSFBool SoDragger::isActive
Is TRUE whenever the user is interacting with the dragger. For compound draggers (draggers consisting of one or more subdraggers), the isActive field is updated only for the active subdragger, not for the compound dragger.

Author
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