The SoEventCallback class provides functionality for catching events. More...

#include <Inventor/nodes/SoEventCallback.h>

Inheritance diagram for SoEventCallback:

Public Member Functions
	SoEventCallback (void)

void	addEventCallback (SoType eventtype, SoEventCallbackCB f, void userdata=NULL)

SoHandleEventAction *	getAction (void) const

const SoEvent *	getEvent (void) const

const SoPath *	getPath (void)

const SoPickedPoint *	getPickedPoint (void) const

virtual SoType	getTypeId (void) const

void	grabEvents (void)

SbBool	isHandled (void) const

void	releaseEvents (void)

void	removeEventCallback (SoType eventtype, SoEventCallbackCB f, void userdata=NULL)

void	setHandled (void)

void	setPath (SoPath *path)

Public Member Functions inherited from SoNode
virtual SoNode *	addToCopyDict (void) const

virtual SbBool	affectsState (void) const

virtual void	audioRender (SoAudioRenderAction *action)

virtual void	callback (SoCallbackAction *action)

virtual SoNode *	copy (SbBool copyconnections=FALSE) const

virtual void	copyContents (const SoFieldContainer *from, SbBool copyconnections)

virtual SoFieldContainer *	copyThroughConnection (void) const

virtual void	doAction (SoAction *action)

virtual void	getBoundingBox (SoGetBoundingBoxAction *action)

virtual SoChildList *	getChildren (void) const

virtual void	getMatrix (SoGetMatrixAction *action)

SbUniqueId	getNodeId (void) const

NodeType	getNodeType (void) const

virtual void	getPrimitiveCount (SoGetPrimitiveCountAction *action)

virtual void	GLRender (SoGLRenderAction *action)

virtual void	GLRenderBelowPath (SoGLRenderAction *action)

virtual void	GLRenderInPath (SoGLRenderAction *action)

virtual void	GLRenderOffPath (SoGLRenderAction *action)

virtual void	grabEventsCleanup (void)

virtual void	grabEventsSetup (void)

SbBool	isOverride (void) const

virtual void	notify (SoNotList *l)

virtual void	pick (SoPickAction *action)

virtual void	rayPick (SoRayPickAction *action)

virtual void	search (SoSearchAction *action)

void	setNodeType (const NodeType type)

void	setOverride (const SbBool state)

virtual void	startNotify (void)

virtual void	write (SoWriteAction *action)

virtual void	writeInstance (SoOutput *out)

Public Member Functions inherited from SoFieldContainer
virtual void	addWriteReference (SoOutput *out, SbBool isfromfield=FALSE)

void	copyFieldValues (const SoFieldContainer *container, SbBool copyconnections=FALSE)

SbBool	enableNotify (const SbBool flag)

SbBool	fieldsAreEqual (const SoFieldContainer *container) const

void	get (SbString &fielddata)

void	get (SbString &fielddata, SoOutput *out)

virtual int	getAllFields (SoFieldList &l) const

virtual SoField *	getEventIn (const SbName &name) const

virtual SoField *	getEventOut (const SbName &name) const

virtual SoField *	getField (const SbName &name) const

SbBool	getFieldName (const SoField *const field, SbName &name) const

virtual int	getFields (SoFieldList &l) const

virtual void	getFieldsMemorySize (size_t &managed, size_t &unmanaged) const

SbBool	getIsBuiltIn (void) const

void *	getUserData (void) const

SbBool	hasDefaultValues (void) const

SbBool	isNotifyEnabled (void) const

SbBool	set (const char *const fielddata)

SbBool	set (const char fielddata, SoInput input)

void	setToDefaults (void)

void	setUserData (void *userdata) const

virtual SbBool	validateNewFieldValue (SoField field, void newval)

Public Member Functions inherited from SoBase
void	addAuditor (void *const auditor, const SoNotRec::Type type)

void	assertAlive (void) const

const SoAuditorList &	getAuditors (void) const

virtual SbName	getName (void) const

int32_t	getRefCount (void) const

SbBool	isOfType (SoType type) const
	Returns `TRUE` if the type of this object is either of the same type or inherited from type.

void	ref (void) const

void	removeAuditor (void *const auditor, const SoNotRec::Type type)

virtual void	setName (const SbName &newname)

SbBool	shouldWrite (void)

void	touch (void)

void	unref (void) const

void	unrefNoDelete (void) const

Static Public Member Functions
static SoType	getClassTypeId (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 Public Member Functions inherited from SoNode
static void	audioRenderS (SoAction action, SoNode node)

static void	callbackS (SoAction action, SoNode node)

static int	getActionMethodIndex (const SoType type)

static void	getBoundingBoxS (SoAction action, SoNode node)

static SoNode *	getByName (const SbName &name)

static int	getByName (const SbName &name, SoNodeList &l)

static SoType	getClassTypeId (void)

static uint32_t	getCompatibilityTypes (const SoType &nodetype)

static void	getMatrixS (SoAction action, SoNode node)

static SbUniqueId	getNextNodeId (void)

static void	getPrimitiveCountS (SoAction action, SoNode node)

static void	GLRenderS (SoAction action, SoNode node)

static void	handleEventS (SoAction action, SoNode node)

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 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 Public Member Functions inherited from SoFieldContainer
static void	addCopy (const SoFieldContainer orig, const SoFieldContainer copy)

static SoFieldContainer *	checkCopy (const SoFieldContainer *orig)

static void	cleanupClass (void)

static void	copyDone (void)

static SoFieldContainer *	findCopy (const SoFieldContainer *orig, const SbBool copyconnections)

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

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	initCopyDict (void)

Static Public Member Functions inherited from SoBase
static void	addName (SoBase const base, const char const name)

static SbBool	connectRoute (SoInput *input, const SbName &fromnodename, const SbName &fromfieldname, const SbName &tonodename, const SbName &tofieldname)

static void	decrementCurrentWriteCounter (void)

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

static SoBase *	getNamedBase (const SbName &name, SoType type)

static int	getNamedBases (const SbName &name, SoBaseList &baselist, SoType type)

static SbBool	getTraceRefs (void)

static void	incrementCurrentWriteCounter (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 SbBool	read (SoInput input, SoBase &base, SoType expectedtype)

static SbBool	readRoute (SoInput *input)

static void	removeName (SoBase const base, const char const name)

static void	setInstancePrefix (const SbString &c)

static void	setTraceRefs (SbBool trace)

Protected Member Functions
virtual	~SoEventCallback ()

virtual const SoFieldData *	getFieldData (void) const

virtual void	handleEvent (SoHandleEventAction *action)

Protected Member Functions inherited from SoNode
	SoNode (void)

virtual	~SoNode ()

virtual SbBool	readInstance (SoInput *in, unsigned short flags)

Protected Member Functions inherited from SoFieldContainer
	SoFieldContainer (void)

virtual	~SoFieldContainer ()

Protected Member Functions inherited from SoBase
	SoBase (void)

virtual	~SoBase ()

virtual SoNotRec	createNotRec (void)

virtual void	destroy (void)

virtual const char *	getFileFormatName (void) const

SbBool	hasMultipleWriteRefs (void) const

void	writeFooter (SoOutput *out) const

SbBool	writeHeader (SoOutput *out, SbBool isgroup, SbBool isengine) const

Static Protected Member Functions
static const SoFieldData **	getFieldDataPtr (void)

Static Protected Member Functions inherited from SoNode
static const SoFieldData **	getFieldDataPtr (void)

static int	getNextActionMethodIndex (void)

static void	incNextActionMethodIndex (void)

static void	setCompatibilityTypes (const SoType &nodetype, const uint32_t bitmask)

static void	setNextActionMethodIndex (int index)

Static Protected Member Functions inherited from SoBase
static uint32_t	getCurrentWriteCounter (void)

static void	staticDataLock (void)

static void	staticDataUnlock (void)

Additional Inherited Members
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 }

Protected Types inherited from SoBase
enum	BaseFlags { IS_ENGINE = 0x01 , IS_GROUP = 0x02 }

Protected Attributes inherited from SoNode
SbUniqueId	uniqueId

Protected Attributes inherited from SoFieldContainer
SbBool	isBuiltIn

Static Protected Attributes inherited from SoNode
static int	nextActionMethodIndex = 0

static SbUniqueId	nextUniqueId = 1

Detailed Description

The SoEventCallback class provides functionality for catching events.

Use SoEventCallback nodes in the scene graph for catching user interaction events with the scene graph's render canvas.

This is how event handling works in Coin: when the user interacts with the render canvas, for instance by using the mouse pointer or by hitting the keyboard, the GUI interface toolkit (i.e. SoQt, SoWin, SoXt, Sc21 ...) will catch the event and translate it from a window system specific event to a generic Coin event. (For the types of generic Coin events, see the classes derived from SoEvent.) This event will then be wrapped inside a SoHandleEventAction and applied to the scene graph. All this happens within the So[Qt|Xt|Win|...] toolkit.

The SoHandleEventAction then traverses the scene graph, delivering the event to any node type which "is interested" in it. The SoEventCallback node type catches the action and forwards the event to a callback function set up by the application programmer.

Be careful about which position in the scene graph you insert SoEventCallback nodes if you are also using any of the built-in Coin library elements which are interested in user interaction events (like for instance the dragger and manipulator classes and the SoSelection nodes). These Coin elements might catch the event for themselves, short-circuiting the SoHandleEventAction traversal so the event will never reach the SoEventCallback node(s) you insert.

FILE FORMAT/DEFAULTS:

EventCallback {

}

SbList

The SbList class is a template container class for lists.

Definition SbList.h:70

Constructor & Destructor Documentation

◆ SoEventCallback()

SoEventCallback::SoEventCallback ( void )

Constructor.

◆ ~SoEventCallback()

SoEventCallback::~SoEventCallback ( )

protectedvirtual

Destructor.

Member Function Documentation

◆ addEventCallback()

void SoEventCallback::addEventCallback	(	SoType	eventtype,
		SoEventCallbackCB *	f,
		void *	userdata = NULL )

Set up a callback function f which will be invoked for the given eventtype. userdata will be given as the first argument to the function.

◆ getAction()

SoHandleEventAction * SoEventCallback::getAction ( void ) const

Returns the SoHandleEventAction instance currently traversing the scene graph with the SoEvent-derived event object.

◆ getClassTypeId()

SoType SoEventCallback::getClassTypeId ( void )

static

This static method returns the SoType object associated with objects of this class.

◆ getEvent()

const SoEvent * SoEventCallback::getEvent ( void ) const

Returns a pointer to the event object which is currently being sent through the scene graph.

If your application code handles the event, you probably want to call SoEventCallback::setHandled() to notify the SoHandleEventAction that it should stop traversing the scene graph with the event.

◆ getFieldData()

const SoFieldData * SoEventCallback::getFieldData ( void ) const

protectedvirtual

Returns a pointer to the class-wide field data storage object for this instance. If no fields are present, returns NULL.

Reimplemented from SoFieldContainer.

◆ getFieldDataPtr()

const SoFieldData ** SoEventCallback::getFieldDataPtr ( void )

staticprotected

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.

◆ getPath()

const SoPath * SoEventCallback::getPath ( void )

Returns the path that must be picked before callbacks are invoked.

See also: setPath()

◆ getPickedPoint()

const SoPickedPoint * SoEventCallback::getPickedPoint ( void ) const

Returns the picked point for the current handle event traversal.

This is obviously only related to events which can be considered "pick-style" events, like mouse button presses.

◆ getTypeId()

SoType SoEventCallback::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.

Implements SoBase.

◆ grabEvents()

void SoEventCallback::grabEvents ( void )

Set up the node so all future events (until releaseEvents() is called) in Coin will be directly forwarded to this node.

◆ handleEvent()

void SoEventCallback::handleEvent ( SoHandleEventAction * action )

protectedvirtual

Invokes the registered callback functions.

Reimplemented from SoNode.

◆ isHandled()

SbBool SoEventCallback::isHandled ( void ) const

Check whether or not the event from the SoHandleEventAction has been handled.

◆ releaseEvents()

void SoEventCallback::releaseEvents ( void )

Do not grab event handling any more.

See also: grabEvents()

◆ removeEventCallback()

void SoEventCallback::removeEventCallback	(	SoType	eventtype,
		SoEventCallbackCB *	f,
		void *	userdata = NULL )

Unregister the given callback function f.

◆ setHandled()

void SoEventCallback::setHandled ( void )

Use this method from a callback function to notify the node that the event has been handled.

The rest of the callbacks registered with the node will still be called, but further SoEventCallback nodes in the scene will not be notified about the event, neither will any other Coin elements in the scene graph (like for instance SoDragger objects, SoSelection nodes or manipulators).

Since callbacks registered within the same SoEventCallback node will still be invoked after the event has been handled, it is likely that you should use SoEventCallback::isHandled() to check for this condition from your callback functions.

◆ setPath()

void SoEventCallback::setPath ( SoPath * pathptr )

Sets the path that must be picked before the registered callbacks are invoked. If NULL, callbacks will be invoked for every event that matches the callback event type.

See also: getPath()

The documentation for this class was generated from the following files:

SoEventCallback.h
SoEventCallback.cpp

Public Member Functions

Static Public Member Functions

Protected Member Functions

Static Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ SoEventCallback()

◆ ~SoEventCallback()

Member Function Documentation

◆ addEventCallback()

◆ getAction()

◆ getClassTypeId()

◆ getEvent()

◆ getFieldData()

◆ getFieldDataPtr()

◆ getPath()

◆ getPickedPoint()

◆ getTypeId()

◆ grabEvents()

◆ handleEvent()

◆ isHandled()

◆ releaseEvents()

◆ removeEventCallback()

◆ setHandled()

◆ setPath()