SoPathSensor(3)

NAME
SoPathSensor - The SoPathSensor class detects changes to paths.

SYNOPSIS

#include <Inventor/sensors/SoPathSensor.h>

Inherits SoDataSensor.

  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

  Protected Member Functions
virtual void notify (SoNotList *l)

  Additional Inherited Members

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

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

  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 (void) [virtual]
Destructor.

Member Function Documentation

  void SoPathSensor::setTriggerFilter (const TriggerFilter filter)
Set the TriggerFilter for this sensor.

The default is PATH_AND_NODES.

Since
    Coin 2.0

  SoPathSensor::TriggerFilter SoPathSensor::getTriggerFilter (void) const
Return the TriggerFilter for this sensor.

Since
    Coin 2.0

  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()

  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()

  SoPath * SoPathSensor::getAttachedPath (void) const
Returns a pointer to the path connected to the sensor.

See also
    attach(), detach()

  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.

Author

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