question_usage_null_observer Class Reference

Null implmentation of the question_usage_watcher interface. More...

Inheritance diagram for question_usage_null_observer:

Public Member Functions
	notify_attempt_added (question_attempt $qa)
	Called when a new question attempt is added to this usage.
	notify_attempt_modified (question_attempt $qa)
	Called when the fields of a question attempt in this usage are modified.
	notify_attempt_moved (question_attempt $qa, $oldslot)
	Called when a question_attempt has been moved to a new slot.
	notify_metadata_added (question_attempt $qa, $name)
	Called when a new metadata variable is set on a question attempt in this usage.
	notify_metadata_modified (question_attempt $qa, $name)
	Called when a metadata variable on a question attempt in this usage is updated.
	notify_modified ()
	Called when a field of the question_usage_by_activity is changed.
	notify_step_added (question_attempt_step $step, question_attempt $qa, $seq)
	Called when a new step is added to a question attempt in this usage.
	notify_step_deleted (question_attempt_step $step, question_attempt $qa)
	Called when a new step is updated in a question attempt in this usage.
	notify_step_modified (question_attempt_step $step, question_attempt $qa, $seq)
	Called when a new step is updated in a question attempt in this usage.

Detailed Description

Null implmentation of the question_usage_watcher interface.

Does nothing.

Copyright

2009 The Open University

License

http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

Member Function Documentation

notify_attempt_added()

question_usage_null_observer::notify_attempt_added

(

question_attempt

$qa

)

Called when a new question attempt is added to this usage.

Parameters

question_attempt

$qa

the newly added question attempt.

Implements question_usage_observer.

notify_attempt_modified()

question_usage_null_observer::notify_attempt_modified

(

question_attempt

$qa

)

Called when the fields of a question attempt in this usage are modified.

Parameters

question_attempt

$qa

the newly added question attempt.

Implements question_usage_observer.

notify_attempt_moved()

question_usage_null_observer::notify_attempt_moved	(	question_attempt	$qa,
			$oldslot )

Called when a question_attempt has been moved to a new slot.

Parameters

question_attempt	$qa	The question attempt that was moved.
int	$oldslot	The previous slot number of that attempt.

Implements question_usage_observer.

notify_metadata_added()

question_usage_null_observer::notify_metadata_added	(	question_attempt	$qa,
			$name )

Called when a new metadata variable is set on a question attempt in this usage.

Parameters

question_attempt	$qa	the question attempt the metadata is being added to.
int	$name	the name of the metadata variable added.

Implements question_usage_observer.

notify_metadata_modified()

question_usage_null_observer::notify_metadata_modified	(	question_attempt	$qa,
			$name )

Called when a metadata variable on a question attempt in this usage is updated.

Parameters

question_attempt	$qa	the question attempt where the metadata is being modified.
int	$name	the name of the metadata variable modified.

Implements question_usage_observer.

notify_modified()

question_usage_null_observer::notify_modified

(

)

Called when a field of the question_usage_by_activity is changed.

Implements question_usage_observer.

notify_step_added()

question_usage_null_observer::notify_step_added	(	question_attempt_step	$step,
		question_attempt	$qa,
			$seq )

Called when a new step is added to a question attempt in this usage.

Parameters

question_attempt_step	$step	the new step.
question_attempt	$qa	the usage it is being added to.
int	$seq	the sequence number of the new step.

Implements question_usage_observer.

notify_step_deleted()

question_usage_null_observer::notify_step_deleted	(	question_attempt_step	$step,
		question_attempt	$qa )

Called when a new step is updated in a question attempt in this usage.

Parameters

question_attempt_step	$step	the step to delete.
question_attempt	$qa	the usage it is being added to.

Implements question_usage_observer.

notify_step_modified()

question_usage_null_observer::notify_step_modified	(	question_attempt_step	$step,
		question_attempt	$qa,
			$seq )

Called when a new step is updated in a question attempt in this usage.

Parameters

question_attempt_step	$step	the step that was updated.
question_attempt	$qa	the usage it is being added to.
int	$seq	the sequence number of the new step.

Implements question_usage_observer.

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

• question/engine/questionusage.php