---
name: "SoActionMethodList"
section: "3"
platform: "linux"
package: "coin"
version: "1:4.0.10-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/SoActionMethodList"
---

# SoActionMethodList(3)

The SoActionMethodList class contains function pointers for action methods.

## NAME

SoActionMethodList - The **SoActionMethodList** class contains function pointers for action methods.

## SYNOPSIS

\#include \<Inventor/lists/SoActionMethodList.h\>

Inherits **SbPList**.

### Public Member Functions

**SoActionMethodList** (**SoActionMethodList** \*const parentlist)\
 **~SoActionMethodList** ()\
 SoActionMethod & **operator\[\]** (const int index)\
 void **addMethod** (const **SoType** node, const SoActionMethod method)\
 void **setUp** (void)\

Public Member Functions inherited from **SbPList** **SbPList** (const int sizehint=DEFAULTSIZE)\
 **SbPList** (const **SbPList** &l)\
 **~SbPList** ()\
 void **copy** (const **SbPList** &l)\
 **SbPList** & **operator=** (const **SbPList** &l)\
 void **fit** (void)\
 void **append** (void \*item)\
 int **find** (const void \*item) const\
 void **insert** (void \*item, const int insertbefore)\
 void **removeItem** (void \*item)\
 void **remove** (const int index)\
 void **removeFast** (const int index)\
 int **getLength** (void) const\
 void **truncate** (const int length, const int **fit**=0)\
 void \*\* **getArrayPtr** (const int start=0) const\
 void \*& **operator\[\]** (const int index) const\
 int **operator==** (const **SbPList** &l) const\
 int **operator!=** (const **SbPList** &l) const\
 void \* **get** (const int index) const\
 void **set** (const int index, void \*item)\

### Additional Inherited Members

Protected Member Functions inherited from **SbPList** void **expand** (const int size)\
 int **getArraySize** (void) const\

## Detailed Description

The **SoActionMethodList** class contains function pointers for action methods.

An **SoActionMethodList** contains one function pointer per node type. Each action contains an SoActioMethodList to know which functions to call during scene graph traversal.

## Constructor & Destructor Documentation

### SoActionMethodList::SoActionMethodList (SoActionMethodList \*const parentlist)

The constructor. The *parentlist* argument is the parent action's action method list. It can be NULL for action method lists that are not based on inheriting from a parent action.

### SoActionMethodList::~SoActionMethodList ()

Destructor.

## Member Function Documentation

### SoActionMethod & SoActionMethodList::operator\[\] (const int index)

Returns element at *index*.

Will automatically expand the size of the internal array if *index* is outside the current bounds of the list. The values of any additional pointers are then set to NULL.

Overloaded from parent to return an SoActionMethod.

**See also**

**SbPList::operator\[\]()**

### void SoActionMethodList::addMethod (const SoType node, const SoActionMethod method)

Add a function pointer to a node type's action method.

### void SoActionMethodList::setUp (void )

This method must be called as the last initialization step before using the list. It fills in NULL entries with the parent's method.

## Author

Generated automatically by Doxygen for Coin from the source code.