.TH "SoEventCallback" 3 "Fri Sep 6 2024 15:32:06" "Version 4.0.3" "Coin" \" -*- nroff -*-
.ad l
.nh
.SH NAME
SoEventCallback \- The \fBSoEventCallback\fP class provides functionality for catching events\&.  

.SH SYNOPSIS
.br
.PP
.PP
\fR#include <Inventor/nodes/SoEventCallback\&.h>\fP
.PP
Inherits \fBSoNode\fP\&.
.SS "Public Member Functions"

.in +1c
.ti -1c
.RI "virtual \fBSoType\fP \fBgetTypeId\fP (void) const"
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.ti -1c
.RI "\fBSoEventCallback\fP (void)"
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.ti -1c
.RI "void \fBsetPath\fP (\fBSoPath\fP *path)"
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.ti -1c
.RI "const \fBSoPath\fP * \fBgetPath\fP (void)"
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.ti -1c
.RI "void \fBaddEventCallback\fP (\fBSoType\fP eventtype, SoEventCallbackCB *f, void *userdata=NULL)"
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.ti -1c
.RI "void \fBremoveEventCallback\fP (\fBSoType\fP eventtype, SoEventCallbackCB *f, void *userdata=NULL)"
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.ti -1c
.RI "\fBSoHandleEventAction\fP * \fBgetAction\fP (void) const"
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.ti -1c
.RI "const \fBSoEvent\fP * \fBgetEvent\fP (void) const"
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.ti -1c
.RI "const \fBSoPickedPoint\fP * \fBgetPickedPoint\fP (void) const"
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.ti -1c
.RI "void \fBsetHandled\fP (void)"
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.ti -1c
.RI "SbBool \fBisHandled\fP (void) const"
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.ti -1c
.RI "void \fBgrabEvents\fP (void)"
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.ti -1c
.RI "void \fBreleaseEvents\fP (void)"
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.in -1c

Public Member Functions inherited from \fBSoNode\fP
.in +1c
.ti -1c
.RI "void \fBsetOverride\fP (const SbBool state)"
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.ti -1c
.RI "SbBool \fBisOverride\fP (void) const"
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.ti -1c
.RI "void \fBsetNodeType\fP (const \fBNodeType\fP type)"
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.ti -1c
.RI "\fBNodeType\fP \fBgetNodeType\fP (void) const"
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.ti -1c
.RI "virtual \fBSoNode\fP * \fBcopy\fP (SbBool copyconnections=FALSE) const"
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.ti -1c
.RI "virtual SbBool \fBaffectsState\fP (void) const"
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.ti -1c
.RI "virtual void \fBdoAction\fP (\fBSoAction\fP *action)"
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.ti -1c
.RI "virtual void \fBGLRender\fP (\fBSoGLRenderAction\fP *action)"
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.ti -1c
.RI "virtual void \fBGLRenderBelowPath\fP (\fBSoGLRenderAction\fP *action)"
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.ti -1c
.RI "virtual void \fBGLRenderInPath\fP (\fBSoGLRenderAction\fP *action)"
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.ti -1c
.RI "virtual void \fBGLRenderOffPath\fP (\fBSoGLRenderAction\fP *action)"
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.ti -1c
.RI "virtual void \fBcallback\fP (\fBSoCallbackAction\fP *action)"
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.ti -1c
.RI "virtual void \fBgetBoundingBox\fP (\fBSoGetBoundingBoxAction\fP *action)"
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.ti -1c
.RI "virtual void \fBgetMatrix\fP (\fBSoGetMatrixAction\fP *action)"
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.ti -1c
.RI "virtual void \fBpick\fP (\fBSoPickAction\fP *action)"
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.ti -1c
.RI "virtual void \fBrayPick\fP (\fBSoRayPickAction\fP *action)"
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.ti -1c
.RI "virtual void \fBsearch\fP (\fBSoSearchAction\fP *action)"
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.ti -1c
.RI "virtual void \fBwrite\fP (\fBSoWriteAction\fP *action)"
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.ti -1c
.RI "virtual void \fBaudioRender\fP (\fBSoAudioRenderAction\fP *action)"
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.ti -1c
.RI "virtual void \fBgetPrimitiveCount\fP (\fBSoGetPrimitiveCountAction\fP *action)"
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.ti -1c
.RI "virtual void \fBgrabEventsSetup\fP (void)"
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.ti -1c
.RI "virtual void \fBgrabEventsCleanup\fP (void)"
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.ti -1c
.RI "virtual void \fBstartNotify\fP (void)"
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.ti -1c
.RI "virtual void \fBnotify\fP (\fBSoNotList\fP *l)"
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.ti -1c
.RI "SbUniqueId \fBgetNodeId\fP (void) const"
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.ti -1c
.RI "virtual \fBSoChildList\fP * \fBgetChildren\fP (void) const"
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.ti -1c
.RI "virtual void \fBwriteInstance\fP (\fBSoOutput\fP *out)"
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.ti -1c
.RI "virtual \fBSoNode\fP * \fBaddToCopyDict\fP (void) const"
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.ti -1c
.RI "virtual void \fBcopyContents\fP (const \fBSoFieldContainer\fP *from, SbBool copyconnections)"
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.ti -1c
.RI "virtual \fBSoFieldContainer\fP * \fBcopyThroughConnection\fP (void) const"
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Public Member Functions inherited from \fBSoFieldContainer\fP
.in +1c
.ti -1c
.RI "void \fBsetToDefaults\fP (void)"
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.ti -1c
.RI "SbBool \fBhasDefaultValues\fP (void) const"
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.ti -1c
.RI "SbBool \fBfieldsAreEqual\fP (const \fBSoFieldContainer\fP *container) const"
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.ti -1c
.RI "void \fBcopyFieldValues\fP (const \fBSoFieldContainer\fP *container, SbBool copyconnections=FALSE)"
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.ti -1c
.RI "SbBool \fBset\fP (const char *const fielddata)"
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.ti -1c
.RI "void \fBget\fP (\fBSbString\fP &fielddata)"
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.ti -1c
.RI "virtual int \fBgetFields\fP (\fBSoFieldList\fP &l) const"
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.ti -1c
.RI "virtual int \fBgetAllFields\fP (\fBSoFieldList\fP &l) const"
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.ti -1c
.RI "virtual \fBSoField\fP * \fBgetField\fP (const \fBSbName\fP &name) const"
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.ti -1c
.RI "virtual \fBSoField\fP * \fBgetEventIn\fP (const \fBSbName\fP &name) const"
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.ti -1c
.RI "virtual \fBSoField\fP * \fBgetEventOut\fP (const \fBSbName\fP &name) const"
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.ti -1c
.RI "SbBool \fBgetFieldName\fP (const \fBSoField\fP *const field, \fBSbName\fP &name) const"
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.ti -1c
.RI "SbBool \fBenableNotify\fP (const SbBool flag)"
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.ti -1c
.RI "SbBool \fBisNotifyEnabled\fP (void) const"
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.ti -1c
.RI "SbBool \fBset\fP (const char *fielddata, \fBSoInput\fP *input)"
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.ti -1c
.RI "void \fBget\fP (\fBSbString\fP &fielddata, \fBSoOutput\fP *out)"
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.ti -1c
.RI "virtual SbBool \fBvalidateNewFieldValue\fP (\fBSoField\fP *field, void *newval)"
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.ti -1c
.RI "virtual void \fBaddWriteReference\fP (\fBSoOutput\fP *out, SbBool isfromfield=FALSE)"
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.ti -1c
.RI "SbBool \fBgetIsBuiltIn\fP (void) const"
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.ti -1c
.RI "virtual void \fBgetFieldsMemorySize\fP (size_t &managed, size_t &unmanaged) const"
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.ti -1c
.RI "void \fBsetUserData\fP (void *userdata) const"
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.ti -1c
.RI "void * \fBgetUserData\fP (void) const"
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.in -1c

Public Member Functions inherited from \fBSoBase\fP
.in +1c
.ti -1c
.RI "void \fBref\fP (void) const"
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.ti -1c
.RI "void \fBunref\fP (void) const"
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.ti -1c
.RI "void \fBunrefNoDelete\fP (void) const"
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.ti -1c
.RI "int32_t \fBgetRefCount\fP (void) const"
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.ti -1c
.RI "void \fBtouch\fP (void)"
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.ti -1c
.RI "SbBool \fBisOfType\fP (\fBSoType\fP type) const"
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.RI "Returns \fRTRUE\fP if the type of this object is either of the same type or inherited from \fItype\fP\&. "
.ti -1c
.RI "virtual \fBSbName\fP \fBgetName\fP (void) const"
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.ti -1c
.RI "virtual void \fBsetName\fP (const \fBSbName\fP &newname)"
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.ti -1c
.RI "void \fBaddAuditor\fP (void *const auditor, const \fBSoNotRec::Type\fP type)"
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.ti -1c
.RI "void \fBremoveAuditor\fP (void *const auditor, const \fBSoNotRec::Type\fP type)"
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.ti -1c
.RI "const \fBSoAuditorList\fP & \fBgetAuditors\fP (void) const"
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.ti -1c
.RI "SbBool \fBshouldWrite\fP (void)"
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.ti -1c
.RI "void \fBassertAlive\fP (void) const"
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.in -1c
.SS "Static Public Member Functions"

.in +1c
.ti -1c
.RI "static \fBSoType\fP \fBgetClassTypeId\fP (void)"
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.ti -1c
.RI "static void \fBinitClass\fP (void)"
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.RI "Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system\&.    "
.in -1c

Static Public Member Functions inherited from \fBSoNode\fP
.in +1c
.ti -1c
.RI "static uint32_t \fBgetCompatibilityTypes\fP (const \fBSoType\fP &nodetype)"
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.ti -1c
.RI "static \fBSoType\fP \fBgetClassTypeId\fP (void)"
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.ti -1c
.RI "static \fBSoNode\fP * \fBgetByName\fP (const \fBSbName\fP &name)"
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.ti -1c
.RI "static int \fBgetByName\fP (const \fBSbName\fP &name, \fBSoNodeList\fP &l)"
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.ti -1c
.RI "static void \fBinitClass\fP (void)"
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.RI "Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system\&.    "
.ti -1c
.RI "static void \fBinitClasses\fP (void)"
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.ti -1c
.RI "static SbUniqueId \fBgetNextNodeId\fP (void)"
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.ti -1c
.RI "static int \fBgetActionMethodIndex\fP (const \fBSoType\fP type)"
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.ti -1c
.RI "static void \fBgetBoundingBoxS\fP (\fBSoAction\fP *action, \fBSoNode\fP *node)"
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.ti -1c
.RI "static void \fBGLRenderS\fP (\fBSoAction\fP *action, \fBSoNode\fP *node)"
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.ti -1c
.RI "static void \fBcallbackS\fP (\fBSoAction\fP *action, \fBSoNode\fP *node)"
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.ti -1c
.RI "static void \fBgetMatrixS\fP (\fBSoAction\fP *action, \fBSoNode\fP *node)"
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.ti -1c
.RI "static void \fBhandleEventS\fP (\fBSoAction\fP *action, \fBSoNode\fP *node)"
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.ti -1c
.RI "static void \fBpickS\fP (\fBSoAction\fP *action, \fBSoNode\fP *node)"
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.ti -1c
.RI "static void \fBrayPickS\fP (\fBSoAction\fP *action, \fBSoNode\fP *node)"
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.ti -1c
.RI "static void \fBsearchS\fP (\fBSoAction\fP *action, \fBSoNode\fP *node)"
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.ti -1c
.RI "static void \fBwriteS\fP (\fBSoAction\fP *action, \fBSoNode\fP *node)"
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.ti -1c
.RI "static void \fBaudioRenderS\fP (\fBSoAction\fP *action, \fBSoNode\fP *node)"
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.ti -1c
.RI "static void \fBgetPrimitiveCountS\fP (\fBSoAction\fP *action, \fBSoNode\fP *node)"
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.in -1c

Static Public Member Functions inherited from \fBSoFieldContainer\fP
.in +1c
.ti -1c
.RI "static void \fBinitClass\fP (void)"
.br
.RI "Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system\&.    "
.ti -1c
.RI "static \fBSoType\fP \fBgetClassTypeId\fP (void)"
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.RI "This static method returns the \fBSoType\fP object associated with objects of this class\&.    "
.ti -1c
.RI "static void \fBcleanupClass\fP (void)"
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.ti -1c
.RI "static void \fBinitCopyDict\fP (void)"
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.ti -1c
.RI "static void \fBaddCopy\fP (const \fBSoFieldContainer\fP *orig, const \fBSoFieldContainer\fP *copy)"
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.ti -1c
.RI "static \fBSoFieldContainer\fP * \fBcheckCopy\fP (const \fBSoFieldContainer\fP *orig)"
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.ti -1c
.RI "static \fBSoFieldContainer\fP * \fBfindCopy\fP (const \fBSoFieldContainer\fP *orig, const SbBool copyconnections)"
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.ti -1c
.RI "static void \fBcopyDone\fP (void)"
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.in -1c

Static Public Member Functions inherited from \fBSoBase\fP
.in +1c
.ti -1c
.RI "static void \fBinitClass\fP (void)"
.br
.RI "Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system\&. "
.ti -1c
.RI "static \fBSoType\fP \fBgetClassTypeId\fP (void)"
.br
.RI "This static method returns the \fBSoType\fP object associated with objects of this class\&. "
.ti -1c
.RI "static void \fBaddName\fP (\fBSoBase\fP *const base, const char *const name)"
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.ti -1c
.RI "static void \fBremoveName\fP (\fBSoBase\fP *const base, const char *const name)"
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.ti -1c
.RI "static void \fBincrementCurrentWriteCounter\fP (void)"
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.ti -1c
.RI "static void \fBdecrementCurrentWriteCounter\fP (void)"
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.ti -1c
.RI "static \fBSoBase\fP * \fBgetNamedBase\fP (const \fBSbName\fP &name, \fBSoType\fP type)"
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.ti -1c
.RI "static int \fBgetNamedBases\fP (const \fBSbName\fP &name, \fBSoBaseList\fP &baselist, \fBSoType\fP type)"
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.ti -1c
.RI "static SbBool \fBread\fP (\fBSoInput\fP *input, \fBSoBase\fP *&base, \fBSoType\fP expectedtype)"
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.ti -1c
.RI "static void \fBsetInstancePrefix\fP (const \fBSbString\fP &c)"
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.ti -1c
.RI "static void \fBsetTraceRefs\fP (SbBool trace)"
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.ti -1c
.RI "static SbBool \fBgetTraceRefs\fP (void)"
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.ti -1c
.RI "static SbBool \fBconnectRoute\fP (\fBSoInput\fP *input, const \fBSbName\fP &fromnodename, const \fBSbName\fP &fromfieldname, const \fBSbName\fP &tonodename, const \fBSbName\fP &tofieldname)"
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.ti -1c
.RI "static SbBool \fBreadRoute\fP (\fBSoInput\fP *input)"
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.in -1c
.SS "Protected Member Functions"

.in +1c
.ti -1c
.RI "virtual const \fBSoFieldData\fP * \fBgetFieldData\fP (void) const"
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.ti -1c
.RI "virtual \fB~SoEventCallback\fP ()"
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.ti -1c
.RI "virtual void \fBhandleEvent\fP (\fBSoHandleEventAction\fP *action)"
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.in -1c

Protected Member Functions inherited from \fBSoNode\fP
.in +1c
.ti -1c
.RI "\fBSoNode\fP (void)"
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.ti -1c
.RI "virtual \fB~SoNode\fP ()"
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.ti -1c
.RI "virtual SbBool \fBreadInstance\fP (\fBSoInput\fP *in, unsigned short flags)"
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.in -1c

Protected Member Functions inherited from \fBSoFieldContainer\fP
.in +1c
.ti -1c
.RI "\fBSoFieldContainer\fP (void)"
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.ti -1c
.RI "virtual \fB~SoFieldContainer\fP ()"
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.in -1c

Protected Member Functions inherited from \fBSoBase\fP
.in +1c
.ti -1c
.RI "\fBSoBase\fP (void)"
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.ti -1c
.RI "virtual \fB~SoBase\fP ()"
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.ti -1c
.RI "virtual void \fBdestroy\fP (void)"
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.ti -1c
.RI "SbBool \fBhasMultipleWriteRefs\fP (void) const"
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.ti -1c
.RI "SbBool \fBwriteHeader\fP (\fBSoOutput\fP *out, SbBool isgroup, SbBool isengine) const"
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.ti -1c
.RI "void \fBwriteFooter\fP (\fBSoOutput\fP *out) const"
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.ti -1c
.RI "virtual const char * \fBgetFileFormatName\fP (void) const"
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.ti -1c
.RI "virtual \fBSoNotRec\fP \fBcreateNotRec\fP (void)"
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.in -1c
.SS "Static Protected Member Functions"

.in +1c
.ti -1c
.RI "static const \fBSoFieldData\fP ** \fBgetFieldDataPtr\fP (void)"
.br
.in -1c

Static Protected Member Functions inherited from \fBSoNode\fP
.in +1c
.ti -1c
.RI "static const \fBSoFieldData\fP ** \fBgetFieldDataPtr\fP (void)"
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.ti -1c
.RI "static void \fBsetNextActionMethodIndex\fP (int index)"
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.ti -1c
.RI "static int \fBgetNextActionMethodIndex\fP (void)"
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.ti -1c
.RI "static void \fBincNextActionMethodIndex\fP (void)"
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.ti -1c
.RI "static void \fBsetCompatibilityTypes\fP (const \fBSoType\fP &nodetype, const uint32_t bitmask)"
.br
.in -1c

Static Protected Member Functions inherited from \fBSoBase\fP
.in +1c
.ti -1c
.RI "static uint32_t \fBgetCurrentWriteCounter\fP (void)"
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.ti -1c
.RI "static void \fBstaticDataLock\fP (void)"
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.ti -1c
.RI "static void \fBstaticDataUnlock\fP (void)"
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.in -1c
.SS "Additional Inherited Members"


Public Types inherited from \fBSoNode\fP
.in +1c
.ti -1c
.RI "enum \fBNodeType\fP { \fBINVENTOR\fP = 0x0000, \fBVRML1\fP = 0x0001, \fBVRML2\fP = 0x0002, \fBINVENTOR_1\fP = 0x0004, \fBINVENTOR_2_0\fP = 0x0008, \fBINVENTOR_2_1\fP = 0x0010, \fBINVENTOR_2_5\fP = 0x0020, \fBINVENTOR_2_6\fP = 0x0040, \fBCOIN_1_0\fP = 0x0080, \fBCOIN_2_0\fP = 0x0100, \fBEXTENSION\fP = 0x0200, \fBCOIN_2_2\fP = 0x0400, \fBCOIN_2_3\fP = 0x0800, \fBCOIN_2_4\fP = 0x1000, \fBINVENTOR_5_0\fP = 0x2000, \fBCOIN_2_5\fP = 0x4000, \fBCOIN_3_0\fP = 0x8000, \fBINVENTOR_6_0\fP = 0x10000, \fBCOIN_4_0\fP = 0x20000 }"
.br
.in -1c

Public Attributes inherited from \fBSoBase\fP

Protected Types inherited from \fBSoBase\fP
.in +1c
.ti -1c
.RI "enum \fBBaseFlags\fP { \fBIS_ENGINE\fP = 0x01, \fBIS_GROUP\fP = 0x02 }"
.br
.in -1c

Protected Attributes inherited from \fBSoNode\fP
.in +1c
.ti -1c
.RI "SbUniqueId \fBuniqueId\fP"
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.in -1c

Protected Attributes inherited from \fBSoFieldContainer\fP
.in +1c
.ti -1c
.RI "SbBool \fBisBuiltIn\fP"
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.in -1c

Static Protected Attributes inherited from \fBSoNode\fP
.in +1c
.ti -1c
.RI "static SbUniqueId \fBnextUniqueId\fP = 1"
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.ti -1c
.RI "static int \fBnextActionMethodIndex\fP = 0"
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.in -1c
.SH "Detailed Description"
.PP 
The \fBSoEventCallback\fP class provides functionality for catching events\&. 

Use \fBSoEventCallback\fP nodes in the scene graph for catching user interaction events with the scene graph's render canvas\&.

.PP
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 \fBSoEvent\fP\&.) This event will then be wrapped inside a \fBSoHandleEventAction\fP and applied to the scene graph\&. All this happens within the So[Qt|Xt|Win|\&.\&.\&.] toolkit\&.

.PP
The \fBSoHandleEventAction\fP then traverses the scene graph, delivering the event to any node type which 'is interested' in it\&. The \fBSoEventCallback\fP node type catches the action and forwards the event to a callback function set up by the application programmer\&.

.PP
Be careful about which position in the scene graph you insert \fBSoEventCallback\fP 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 \fBSoSelection\fP nodes)\&. These Coin elements might catch the event for themselves, short-circuiting the \fBSoHandleEventAction\fP traversal so the event will never reach the \fBSoEventCallback\fP node(s) you insert\&.

.PP
\fBFILE FORMAT/DEFAULTS:\fP 
.PP
.nf
EventCallback {
}

.fi
.PP
 
.SH "Constructor & Destructor Documentation"
.PP 
.SS "SoEventCallback::SoEventCallback (void )"
Constructor\&. 
.SS "SoEventCallback::~SoEventCallback ()\fR [protected]\fP, \fR [virtual]\fP"
Destructor\&. 
.SH "Member Function Documentation"
.PP 
.SS "\fBSoType\fP SoEventCallback::getClassTypeId (void )\fR [static]\fP"
This static method returns the \fBSoType\fP object associated with objects of this class\&. 
.br
 
.SS "\fBSoType\fP SoEventCallback::getTypeId (void ) const\fR [virtual]\fP"
Returns the type identification of an object derived from a class inheriting \fBSoBase\fP\&. This is used for runtime type checking and 'downward' casting\&. 
.br
 
.PP
Implements \fBSoBase\fP\&.
.SS "const \fBSoFieldData\fP ** SoEventCallback::getFieldDataPtr (void )\fR [static]\fP, \fR [protected]\fP"
\fIThis API member is considered internal to the library, as it is not likely to be of interest to the application programmer\&.\fP
.br

.br
 Returns the \fBSoFieldData\fP class which holds information about fields in this node\&. 
.br
 
.SS "const \fBSoFieldData\fP * SoEventCallback::getFieldData (void ) const\fR [protected]\fP, \fR [virtual]\fP"
Returns a pointer to the class-wide field data storage object for this instance\&. If no fields are present, returns \fRNULL\fP\&. 
.PP
Reimplemented from \fBSoFieldContainer\fP\&.
.SS "void SoEventCallback::setPath (\fBSoPath\fP * pathptr)"
Sets the path that must be picked before the registered callbacks are invoked\&. If \fRNULL\fP, callbacks will be invoked for every event that matches the callback event type\&.

.PP
\fBSee also\fP
.RS 4
\fBgetPath()\fP 
.RE
.PP

.SS "const \fBSoPath\fP * SoEventCallback::getPath (void )"
Returns the path that must be picked before callbacks are invoked\&.

.PP
\fBSee also\fP
.RS 4
\fBsetPath()\fP 
.RE
.PP

.SS "void SoEventCallback::addEventCallback (\fBSoType\fP eventtype, SoEventCallbackCB * f, void * userdata = \fRNULL\fP)"
Set up a callback function \fIf\fP which will be invoked for the given \fIeventtype\fP\&. \fIuserdata\fP will be given as the first argument to the function\&. 
.SS "void SoEventCallback::removeEventCallback (\fBSoType\fP eventtype, SoEventCallbackCB * f, void * userdata = \fRNULL\fP)"
Unregister the given callback function \fIf\fP\&. 
.SS "\fBSoHandleEventAction\fP * SoEventCallback::getAction (void ) const"
Returns the \fBSoHandleEventAction\fP instance currently traversing the scene graph with the SoEvent-derived event object\&. 
.SS "const \fBSoEvent\fP * SoEventCallback::getEvent (void ) const"
Returns a pointer to the event object which is currently being sent through the scene graph\&.

.PP
If your application code handles the event, you probably want to call \fBSoEventCallback::setHandled()\fP to notify the \fBSoHandleEventAction\fP that it should stop traversing the scene graph with the event\&. 
.SS "const \fBSoPickedPoint\fP * SoEventCallback::getPickedPoint (void ) const"
Returns the picked point for the current handle event traversal\&.

.PP
This is obviously only related to events which can be considered 'pick-style' events, like mouse button presses\&. 
.SS "void SoEventCallback::setHandled (void )"
Use this method from a callback function to notify the node that the event has been handled\&.

.PP
The rest of the callbacks registered with the node will still be called, but further \fBSoEventCallback\fP nodes in the scene will not be notified about the event, neither will any other Coin elements in the scene graph (like for instance \fBSoDragger\fP objects, \fBSoSelection\fP nodes or manipulators)\&.

.PP
Since callbacks registered within the same \fBSoEventCallback\fP node will still be invoked after the event has been handled, it is likely that you should use \fBSoEventCallback::isHandled()\fP to check for this condition from your callback functions\&. 
.SS "SbBool SoEventCallback::isHandled (void ) const"
Check whether or not the event from the \fBSoHandleEventAction\fP has been handled\&. 
.SS "void SoEventCallback::grabEvents (void )"
Set up the node so all future events (until \fBreleaseEvents()\fP is called) in Coin will be directly forwarded to this node\&. 
.SS "void SoEventCallback::releaseEvents (void )"
Do not grab event handling any more\&.

.PP
\fBSee also\fP
.RS 4
\fBgrabEvents()\fP 
.RE
.PP

.SS "void SoEventCallback::handleEvent (\fBSoHandleEventAction\fP * action)\fR [protected]\fP, \fR [virtual]\fP"
Invokes the registered callback functions\&. 
.PP
Reimplemented from \fBSoNode\fP\&.

.SH "Author"
.PP 
Generated automatically by Doxygen for Coin from the source code\&.