NAME

       SoPathSensor -

       The SoPathSensor class detects changes to paths.

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

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 has been removed, or new
       nodes is 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 the callback.

       See Also:
           setFunction(), setData()

   SoPathSensor::~SoPathSensor (void) [virtual]
       Destructor.

Member Function Documentation

   void SoPathSensor::setTriggerFilter (const TriggerFilterfilter)
       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 triggerpath
       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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