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Coin
4.0.3
Coin3D core library
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Coin
4.0.3
Coin3D core library
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The SoSearchAction class provides methods for searching through scene graphs. More...
#include <Inventor/actions/SoSearchAction.h>
Public Types | |
| enum | Interest { FIRST , LAST , ALL } |
| enum | LookFor { NODE = 1 , TYPE = 2 , NAME = 4 } |
 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 } |
Static Public Member Functions | |
| static void | addMethod (const SoType type, SoActionMethod method) |
| static void | enableElement (const SoType type, const int stackindex) |
| static SoType | getClassTypeId (void) |
| static void | initClass (void) |
| Static Public Member Functions inherited from SoAction | |
| static SoType | getClassTypeId (void) |
| static void | initClass (void) |
| static void | initClasses (void) |
| static void | nullAction (SoAction *action, SoNode *node) |
Static Public Attributes | |
| static SbBool | duringSearchAll = FALSE |
Protected Member Functions | |
| virtual void | beginTraversal (SoNode *node) |
| virtual const SoEnabledElementsList & | getEnabledElements (void) const |
| 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 SoActionMethodList * | getClassActionMethods (void) |
| static SoEnabledElementsList * | getClassEnabledElements (void) |
| Static Protected Member Functions inherited from SoAction | |
| static SoActionMethodList * | getClassActionMethods (void) |
| static SoEnabledElementsList * | getClassEnabledElements (void) |
Additional Inherited Members | |
| Protected Attributes inherited from SoAction | |
| SoState * | state |
| SoActionMethodList * | traversalMethods |
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.
| SoSearchAction::SoSearchAction | ( | void | ) |
Initializes internal settings with default values. With the default settings, the SoSearchAction will ignore all nodes.
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virtual |
Destructor.
This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.
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.
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.
This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.
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staticprotected |
Returns list of action methods for this class. The enabledElements and methods variables are protected in the original OIV API. This is not such a good idea, since exposed static class member variables is a major grievance with regard to Win32 DLLs. This function is an extension for Coin, and it is not available in the original SGI Open Inventor v2.1 API.
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staticprotected |
Returns list of enabled elements for this class. The enabledElements and methods variables are protected in the original OIV API. This is not such a good idea, since exposed static class member variables is a major grievance with regard to Win32 DLLs. This function is an extension for Coin, and it is not available in the original SGI Open Inventor v2.1 API.
This static method returns the SoType object associated with objects of this class.
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protectedvirtual |
Returns list of enabled elements.
Reimplemented from SoAction.
| int SoSearchAction::getFind | ( | void | ) | const |
Returns the search configuration of the action instance.
| SoSearchAction::Interest SoSearchAction::getInterest | ( | void | ) | const |
Returns whether only the first, the last, or all the searching matches will be saved.
Returns the name the SoSearchAction instance is configured to search for.
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().
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:
| 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.
| 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.
Initializes the runtime type system for this class, and sets up the enabled elements and action method list.
| 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.
| SbBool SoSearchAction::isSearchingAll | ( | void | ) | const |
Returns the traversal method configuration of the action.
Resets all the SoSearchAction internals back to their default values.
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.
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.
Configures whether only the first, the last, or all the searching matches are of interest. Default configuration is FIRST.
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().
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().
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.
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().
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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.)
1.10.0