SoPathSensor Class Reference
Sensor Classes

The SoPathSensor class detects changes to paths. More...

`#include <Inventor/sensors/SoPathSensor.h>`

Inheritance diagram for SoPathSensor:

## Public Types

enum | TriggerFilter { PATH = 0x1 , NODES = 0x2 , PATH_AND_NODES = 0x3 }

## Public Member Functions

| SoPathSensor (void)
| SoPathSensor (SoSensorCB *func, void *data)
virtual | ~SoPathSensor (void)
void | setTriggerFilter (const TriggerFilter type)
TriggerFilter | getTriggerFilter (void) const
void | attach (SoPath *path)
void | detach (void)
SoPath * | getAttachedPath (void) const
Public Member Functions inherited from SoDataSensor
| SoDataSensor (void)
| SoDataSensor (SoSensorCB *func, void *data)
virtual | ~SoDataSensor (void)
void | setDeleteCallback (SoSensorCB *function, void *data=NULL)
SoNode * | getTriggerNode (void) const
SoField * | getTriggerField (void) const
SoPath * | getTriggerPath (void) const
void | setTriggerPathFlag (SbBool flag)
SbBool | getTriggerPathFlag (void) const
SoNotRec::OperationType | getTriggerOperationType (void) const
int | getTriggerIndex (void) const
int | getTriggerFieldNumIndices (void) const
SoNode * | getTriggerGroupChild (void) const
SoNode * | getTriggerReplacedGroupChild (void) const
virtual void | trigger (void)
Public Member Functions inherited from SoDelayQueueSensor
| SoDelayQueueSensor (void)
| SoDelayQueueSensor (SoSensorCB *func, void *data)
virtual | ~SoDelayQueueSensor (void)
void | setPriority (uint32_t pri)
uint32_t | getPriority (void) const
virtual void | schedule (void)
virtual void | unschedule (void)
virtual SbBool | isScheduled (void) const
virtual SbBool | isIdleOnly (void) const
Public Member Functions inherited from SoSensor
| SoSensor (void)
| SoSensor (SoSensorCB *func, void *data)
virtual | ~SoSensor (void)
void | setFunction (SoSensorCB *callbackfunction)
SoSensorCBPtr | getFunction (void) const
void | setData (void *callbackdata)
void * | getData (void) const
void | setNextInQueue (SoSensor *next)
SoSensor * | getNextInQueue (void) const

## Protected Member Functions

virtual void | notify (SoNotList *l)
Protected Member Functions inherited from SoDataSensor
void | invokeDeleteCallback (void)

## Additional Inherited Members

Static Public Member Functions inherited from SoDelayQueueSensor
static uint32_t | getDefaultPriority (void)
Static Public Member Functions inherited from SoSensor
static void | initClass (void)
Protected Attributes inherited from SoDelayQueueSensor
SbBool | scheduled
Protected Attributes inherited from SoSensor
SoSensorCB * | func
void * | funcData

## Detailed Description

The SoPathSensor class detects changes to paths.

If you need to know when a path changes (i.e. nodes in the path have been removed, or new nodes are added), use this sensor to get a notification.

You can also use this sensor to detect when some node in the path is changed.

An SoPathSensor can also act for delete-callback purposes alone and does not need a regular notification-based callback. The delete callback will be invoked for when the SoPath instance is deleted, not for anything you would be monitoring in a path.

## Member Enumeration Documentation

## TriggerFilter

enum SoPathSensor::TriggerFilter

Trigger filter, which decides if the sensor should trigger on path changes, changes on nodes in the path, or both.

Enumerator
PATH | Trigger on path changes only.
NODES | Trigger on node changes only. This can be nodes in the path, or nodes affecting the nodes in the path (nodes that updates the state and are left of the node in the path).
PATH_AND_NODES | Trigger on both path changes and node changes.

## Constructor & Destructor Documentation

## SoPathSensor() [1/2]

SoPathSensor::SoPathSensor | ( | void |  | ) |

Default constructor. Use setFunction() to set up a callback function later.

## SoPathSensor() [2/2]

SoPathSensor::SoPathSensor | ( | SoSensorCB * | func,
|  | void * | data )

Constructor taking as parameters the sensor callback function and the userdata which will be passed to the callback.

See also
  setFunction(), setData()

## ~SoPathSensor()

SoPathSensor::~SoPathSensor | ( | void |  | ) |

virtual

Destructor.

## Member Function Documentation

## setTriggerFilter()

void SoPathSensor::setTriggerFilter | ( | const TriggerFilter | filter | ) |

Set the TriggerFilter for this sensor.

The default is PATH_AND_NODES.

Since
  Coin 2.0

## getTriggerFilter()

SoPathSensor::TriggerFilter SoPathSensor::getTriggerFilter | ( | void |  | ) | const

Return the TriggerFilter for this sensor.

Since
  Coin 2.0

## attach()

void SoPathSensor::attach | ( | SoPath * | path | ) |

Attach sensor to a path. Whenever the path changes, the sensor will be triggered and call the callback function.

When the SoPath instance is deleted, the sensor will automatically be detached.

See also
  detach()

## detach()

void SoPathSensor::detach | ( | void |  | ) |

Detach sensor from path. As long as an SoPathSensor is detached, it will never invoke its callback function.

See also
  attach()

## getAttachedPath()

SoPath * SoPathSensor::getAttachedPath | ( | void |  | ) | const

Returns a pointer to the path connected to the sensor.

See also
  attach(), detach()

## notify()

void SoPathSensor::notify | ( | SoNotList * | l | ) |

protected virtual

Called from entity we are monitoring when it changes.

If this is an immediate sensor, the field and node (if any) causing the change will be stored and can be fetched by getTriggerField() and getTriggerNode(). If the trigger path flag has been set, the path down to the node is also found and stored for later retrieval by getTriggerPath().

See also
  setTriggerPathFlag()

Reimplemented from SoDataSensor.

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

- SoPathSensor.h
- SoPathSensor.cpp