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SoSearchAction Class Reference

The SoSearchAction class provides methods for searching through scene graphs. More...

#include <Inventor/actions/SoSearchAction.h>

Inheritance diagram for SoSearchAction:
SoAction

Public Types

enum  LookFor { NODE = 1, TYPE = 2, NAME = 4 }
 
enum  Interest { FIRST, LAST, ALL }
 
- Public Types inherited from SoAction
enum  AppliedCode { NODE = 0, PATH = 1, PATH_LIST = 2 }
 
enum  PathCode { NO_PATH = 0, IN_PATH = 1, BELOW_PATH = 2, OFF_PATH = 3 }
 

Public Member Functions

virtual SoType getTypeId (void) const
 
 SoSearchAction (void)
 
virtual ~SoSearchAction (void)
 
void setNode (SoNode *const node)
 
SoNodegetNode (void) const
 
void setType (const SoType type, const SbBool chkderived=TRUE)
 
SoType getType (SbBool &chkderived) const
 
void setName (const SbName name)
 
SbName getName (void) const
 
void setFind (const int what)
 
int getFind (void) const
 
void setInterest (const Interest interest)
 
Interest getInterest (void) const
 
void setSearchingAll (const SbBool searchall)
 
SbBool isSearchingAll (void) const
 
SoPathgetPath (void) const
 
SoPathListgetPaths (void)
 
void reset (void)
 
void setFound (void)
 
SbBool isFound (void) const
 
void addPath (SoPath *const path)
 
- Public Member Functions inherited from SoAction
virtual ~SoAction (void)
 
virtual SbBool isOfType (SoType type) const
 
virtual void apply (SoNode *root)
 
virtual void apply (SoPath *path)
 
virtual void apply (const SoPathList &pathlist, SbBool obeysrules=FALSE)
 
void apply (SoAction *beingApplied)
 
virtual void invalidateState (void)
 
AppliedCode getWhatAppliedTo (void) const
 
SoNodegetNodeAppliedTo (void) const
 
SoPathgetPathAppliedTo (void) const
 
const SoPathListgetPathListAppliedTo (void) const
 
const SoPathListgetOriginalPathListAppliedTo (void) const
 
SbBool isLastPathListAppliedTo (void) const
 
PathCode getPathCode (int &numindices, const int *&indices)
 
void traverse (SoNode *const node)
 
SbBool hasTerminated (void) const
 
const SoPathgetCurPath (void)
 
SoStategetState (void) const
 
PathCode getCurPathCode (void) const
 
virtual SoNodegetCurPathTail (void)
 
void usePathCode (int &numindices, const int *&indices)
 
void pushCurPath (const int childindex, SoNode *node=NULL)
 
void popCurPath (const PathCode prevpathcode)
 
void pushCurPath (void)
 
void popPushCurPath (const int childindex, SoNode *node=NULL)
 
void popCurPath (void)
 
void switchToPathTraversal (SoPath *path)
 
void switchToNodeTraversal (SoNode *node)
 

Static Public Member Functions

static SoType getClassTypeId (void)
 
static void addMethod (const SoType type, SoActionMethod method)
 
static void enableElement (const SoType type, const int stackindex)
 
static void initClass (void)
 
- Static Public Member Functions inherited from SoAction
static void initClass (void)
 
static void initClasses (void)
 
static SoType getClassTypeId (void)
 
static void nullAction (SoAction *action, SoNode *node)
 

Static Public Attributes

static SbBool duringSearchAll = FALSE
 

Protected Member Functions

virtual const SoEnabledElementsListgetEnabledElements (void) const
 
virtual void beginTraversal (SoNode *node)
 
- Protected Member Functions inherited from SoAction
 SoAction (void)
 
virtual void endTraversal (SoNode *node)
 
void setTerminated (const SbBool flag)
 
virtual SbBool shouldCompactPathList (void) const
 

Static Protected Member Functions

static SoEnabledElementsListgetClassEnabledElements (void)
 
static SoActionMethodListgetClassActionMethods (void)
 
- Static Protected Member Functions inherited from SoAction
static SoEnabledElementsListgetClassEnabledElements (void)
 
static SoActionMethodListgetClassActionMethods (void)
 

Additional Inherited Members

- Protected Attributes inherited from SoAction
SoStatestate
 
SoActionMethodListtraversalMethods
 

Detailed Description

The SoSearchAction class provides methods for searching through scene graphs.

Nodes can be searched for by pointer, type, and name, or a combination of those criteria. Types can be interpreted as exact types, or the type can match nodes derived from it. Every single node can be searched, or normal traversal rules can be followed when searching (this is especially important to note with regard to switch nodes).

When using more than one of the setNode(), setType() and setName() calls, note that the action will search for node(s) with an "AND" combination of the given search criteria.

One of the most common pitfalls when using the SoSearchAction class is to call the function isFound() after doing a search. It does not return what you would expect it to return if you haven't read the documentation for that function.

Be aware that if you do search operations on an SoSearchAction created on the stack, you can get some unfortunate side effects if you're not careful. Since SoSearchAction keeps a list of the path(s) found in the latest search, the nodes in these paths will be unref'ed when the SoSearchAction stack instance is destructed at the end of your function. If the root of your scene graph then has ref-count zero (it is often useful to do a unrefNoDelete() before returning a node from a function to leave the referencing to the caller), the root node will be destructed! It might be better to create a heap instance of the search action in those cases, since you'll then be able to destruct the search action before calling unrefNoDelete(). Another solution would be to call reset() before calling unrefNoDelete() on your object, since reset() truncates the path list.

See the documentation of SoTexture2 for a full usage example of SoSearchAction.

Member Enumeration Documentation

◆ LookFor

Specify the search criterion. This can be a bitwise combination of the available values.

◆ Interest

Values used when specifying what node(s) we are interested in: the first one found, the last one or all of them.

Constructor & Destructor Documentation

◆ SoSearchAction()

SoSearchAction::SoSearchAction ( void  )

Initializes internal settings with default values. With the default settings, the SoSearchAction will ignore all nodes.

◆ ~SoSearchAction()

SoSearchAction::~SoSearchAction ( void  )
virtual

Destructor.

Member Function Documentation

◆ getTypeId()

SoType SoSearchAction::getTypeId ( void  ) const
virtual

Returns the type identification of an action derived from a class inheriting SoAction. This is used for runtime type checking and "downward" casting.

Usage example:

void bar(SoAction * action)
{
if (action->getTypeId() == SoGLRenderAction::getClassTypeId()) {
// safe downward cast, know the type
SoGLRenderAction * glrender = (SoGLRenderAction *)action;
}
return; // ignore if not render action
}

For application programmers wanting to extend the library with new actions: this method needs to be overridden in all subclasses. This is typically done as part of setting up the full type system for extension classes, which is usually accomplished by using the predefined macros available through Inventor/nodes/SoSubAction.h: SO_ACTION_SOURCE, SO_ACTION_INIT_CLASS and SO_ACTION_CONSTRUCTOR.

For more information on writing Coin extensions, see the SoAction class documentation.

Returns the actual type id of an object derived from a class inheriting SoAction. Needs to be overridden in all subclasses.

Implements SoAction.

◆ addMethod()

void SoSearchAction::addMethod ( const SoType  type,
SoActionMethod  method 
)
static

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

◆ enableElement()

void SoSearchAction::enableElement ( const SoType  type,
const int  stackindex 
)
static

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

◆ getEnabledElements()

const SoEnabledElementsList & SoSearchAction::getEnabledElements ( void  ) const
protectedvirtual

Returns a list of the elements used by action instances of this class upon traversal operations.

Reimplemented from SoAction.

◆ setNode()

void SoSearchAction::setNode ( SoNode *const  nodeptr)

Sets the node pointer to search for.

The action will be configured to set the search "interest" to LookFor NODE, so there is no need to call SoSearchAction::setFind().

◆ getNode()

SoNode * SoSearchAction::getNode ( void  ) const

Returns the node the SoSearchAction instance is configured to search for.

Note that this method does not return what was found when you applied the action - it only returns what was specifically set by the user with setNode(). What the action found is returned by getPath() and getPaths().

◆ setType()

void SoSearchAction::setType ( const SoType  typearg,
const SbBool  chkderivedarg = TRUE 
)

Configures the SoSearchAction instance to search for nodes of the given type, and nodes of classes derived from the given type if chkderived is TRUE.

The action will be configured to set the search "interest" to LookFor TYPE, so there is no need to call SoSearchAction::setFind().

◆ getType()

SoType SoSearchAction::getType ( SbBool &  chkderivedref) const

Returns the node type which is searched for, and whether derived classes of that type also returns a match.

◆ setName()

void SoSearchAction::setName ( const SbName  namearg)

Configures the SoSearchAction instance to search for nodes with the given name.

The action will be configured to set the search "interest" to LookFor NAME, so there is no need to call SoSearchAction::setFind().

See also
SoNode::getByName()

◆ getName()

SbName SoSearchAction::getName ( void  ) const

Returns the name the SoSearchAction instance is configured to search for.

◆ setFind()

void SoSearchAction::setFind ( const int  what)

Configures what to search for in the scene graph. what is a bitmask of LookFor flags.

Default find configuration is to ignore all nodes, but the setFind() configuration is updated automatically when any one of SoSearchAction::setNode(), SoSearchAction::setType() or SoSearchAction::setName() is called.

◆ getFind()

int SoSearchAction::getFind ( void  ) const

Returns the search configuration of the action instance.

◆ setInterest()

void SoSearchAction::setInterest ( const Interest  interestarg)

Configures whether only the first, the last, or all the searching matches are of interest. Default configuration is FIRST.

◆ getInterest()

SoSearchAction::Interest SoSearchAction::getInterest ( void  ) const

Returns whether only the first, the last, or all the searching matches will be saved.

◆ setSearchingAll()

void SoSearchAction::setSearchingAll ( const SbBool  searchallarg)

Specifies whether normal graph traversal should be done (searchall is FALSE, which is the default setting), or if every single node should be searched (searchall is TRUE).

If the searchall flag is TRUE, even nodes considered "hidden" by other actions are searched (like for instance the disabled children of SoSwitch nodes).

SoBaseKit::setSearchingChildren() must be used to search for nodes under node kits.

◆ isSearchingAll()

SbBool SoSearchAction::isSearchingAll ( void  ) const

Returns the traversal method configuration of the action.

◆ getPath()

SoPath * SoSearchAction::getPath ( void  ) const

Returns the path to the node of interest that matched the search criterions. If no match was found, NULL is returned.

Note that if ALL matches are of interest, the result of a search action must be fetched through SoSearchAction::getPaths().

There is one frequently asked question about the paths that are returned from either this method or the getPaths() method below: "why am I not getting the complete path as expected?"

Well, then you probably have to cast the path to a SoFullPath, since certain nodes (nodekits, many VRML97 nodes) have hidden children. SoPath::getTail() will return the first node that has hidden children, or the tail if none of the nodes have hidden children. SoFullPath::getTail() will always return the actual tail. Just do like this:

SoFullPath * path = (SoFullPath *) searchaction->getPath();
SoVRMLCoordinate * vrmlcord = (SoVRMLCoordinate *) path->getTail();

◆ getPaths()

SoPathList & SoSearchAction::getPaths ( void  )

Returns a path list of all nodes that matched the search criterions.

Note that if interest were only FIRST or LAST, SoSearchAction::getPath() should be used instead of this method.

See also
getPath()

◆ reset()

void SoSearchAction::reset ( void  )

Resets all the SoSearchAction internals back to their default values.

◆ setFound()

void SoSearchAction::setFound ( void  )

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Marks the SoSearchAction instance as terminated.

◆ isFound()

SbBool SoSearchAction::isFound ( void  ) const

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Returns whether the search action was terminated.

Note that this value does not reflect whether the node(s) that was searched for was found or not. Use the result of getPath() / getPaths() if that is what you really are looking for.

◆ addPath()

void SoSearchAction::addPath ( SoPath *const  pathptr)

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Sets the path, or adds the path to the path list, depending on the interest configuration. The path is not copied, so it cannot be modified after being added without side effects.

◆ beginTraversal()

void SoSearchAction::beginTraversal ( SoNode node)
protectedvirtual

This virtual method is called from SoAction::apply(), and is the entry point for the actual scene graph traversal.

It can be overridden to initialize the action at traversal start, for specific initializations in the action subclasses inheriting SoAction.

Default method just calls traverse(), which any overridden implementation of the method must do too (or call SoAction::beginTraversal()) to trigger the scene graph traversal.

Reimplemented from SoAction.

Member Data Documentation

◆ duringSearchAll

SbBool SoSearchAction::duringSearchAll = FALSE
static

Obsoleted global flag, only present for compatibility reasons with old SGI / TGS Inventor application code.

It's set to TRUE when an SoSearchAction traversal with SoSearchAction::isSearchingAll() equal to TRUE is started, and is reset to FALSE again after traversal has finished.

(The flag is used by SGI / TGS Inventor in SoSwitch::affectsState() to know when SoSwitch::whichChild should behave as SoSwitch::SO_SWITCH_ALL. We have a better solution for this problem in Coin.)


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