qtype_calculated_qe2_attempt_updater Class Reference

Inheritance diagram for qtype_calculated_qe2_attempt_updater:

Public Member Functions
	calculate ($expression)
	Evaluate an expression using the variable values.
	compare_answers ($answer1, $answer2)
	discard ()
	format_float ($x, $length=null, $format=null)
	This function should be identical to qtype_calculated_variable_substituter::format_float().
	is_blank_answer ($state)
	load_dataset ($selecteditem)
	question_summary ()
	replace_expressions_in_text ($text, $length=null, $format=null)
	Replace any embedded variables (like {a}) or formulae (like {={a} + {b}}) in some text with the corresponding values.
	response_summary ($state)
	right_answer ()
	set_data_elements_for_step ($state, &$data)
	set_first_step_data_elements ($state, &$data)
	supply_missing_first_step_data (&$data)
	was_answered ($state)

Protected Member Functions
	calculate_raw ($expression)
	Evaluate an expression after the variable values have been substituted.
	parse_response ($state)
	substitute_values_for_eval ($expression)
	Substitute variable placehodlers like {a} with their value wrapped in ().
	substitute_values_pretty ($text)
	Substitute variable placehodlers like {a} with their value without wrapping the value in anything.
	to_text ($html)

Protected Attributes
question_engine_assumption_logger	$logger
array	$prettyvalue = []
	variable values, with negative numbers wrapped in (...).
question_engine_attempt_upgrader	$qeupdater
object	$question
	the question definition data.
array	$safevalue = []
	variable values, with negative numbers wrapped in (...).
array	$search = []
	variable names wrapped in {...}.
	$selecteditem = null
question_behaviour_attempt_updater	$updater
array	$values = []
	variable name => value

Member Function Documentation

calculate()

qtype_calculated_qe2_attempt_updater::calculate

(

$expression

)

Evaluate an expression using the variable values.

Parameters

string

$expression

the expression. A PHP expression with placeholders like {a} for where the variables need to go.

Return values

float

the computed result.

calculate_raw()

qtype_calculated_qe2_attempt_updater::calculate_raw ( $expression )

protected

Evaluate an expression after the variable values have been substituted.

Parameters

string

$expression

the expression. A PHP expression with placeholders like {a} for where the variables need to go.

Return values

float

the computed result.

format_float()

qtype_calculated_qe2_attempt_updater::format_float	(		$x,
			$length = null,
			$format = null )

This function should be identical to qtype_calculated_variable_substituter::format_float().

Except that we do not try to do locale-aware replacement of the decimal point.

Having to copy it here is a pain, but it is the standard rule about not using library code (which may change in future) in upgrade code, which exists at a point in time.

Display a float properly formatted with a certain number of decimal places.

Parameters

number	$x	the number to format
int	$length	restrict to this many decimal places or significant figures. If null, the number is not rounded.
	int	format 1 => decimalformat, 2 => significantfigures.

Return values

string

formtted number.

question_summary()

qtype_calculated_qe2_attempt_updater::question_summary

(

)

Reimplemented from question_qtype_attempt_updater.

replace_expressions_in_text()

qtype_calculated_qe2_attempt_updater::replace_expressions_in_text	(		$text,
			$length = null,
			$format = null )

Replace any embedded variables (like {a}) or formulae (like {={a} + {b}}) in some text with the corresponding values.

Parameters

string

$text

the text to process.

Return values

string

the text with values substituted.

response_summary()

qtype_calculated_qe2_attempt_updater::response_summary

(

$state

)

Reimplemented from question_qtype_attempt_updater.

right_answer()

qtype_calculated_qe2_attempt_updater::right_answer

(

)

Reimplemented from question_qtype_attempt_updater.

set_data_elements_for_step()

qtype_calculated_qe2_attempt_updater::set_data_elements_for_step	(		$state,
		&	$data )

Reimplemented from question_qtype_attempt_updater.

set_first_step_data_elements()

qtype_calculated_qe2_attempt_updater::set_first_step_data_elements	(		$state,
		&	$data )

Reimplemented from question_qtype_attempt_updater.

substitute_values_for_eval()

qtype_calculated_qe2_attempt_updater::substitute_values_for_eval ( $expression )

protected

Substitute variable placehodlers like {a} with their value wrapped in ().

Parameters

string

$expression

the expression. A PHP expression with placeholders like {a} for where the variables need to go.

Return values

string

the expression with each placeholder replaced by the corresponding value.

substitute_values_pretty()

qtype_calculated_qe2_attempt_updater::substitute_values_pretty ( $text )

protected

Substitute variable placehodlers like {a} with their value without wrapping the value in anything.

Parameters

string

$text

some content with placeholders like {a} for where the variables need to go.

Return values

string

the expression with each placeholder replaced by the corresponding value.

supply_missing_first_step_data()

qtype_calculated_qe2_attempt_updater::supply_missing_first_step_data

(

&

$data

)

Reimplemented from question_qtype_attempt_updater.

was_answered()

qtype_calculated_qe2_attempt_updater::was_answered

(

$state

)

Reimplemented from question_qtype_attempt_updater.

Member Data Documentation

$prettyvalue

array qtype_calculated_qe2_attempt_updater::$prettyvalue = []

protected

variable values, with negative numbers wrapped in (...).

Used by substitute_values().

$safevalue

array qtype_calculated_qe2_attempt_updater::$safevalue = []

protected

variable values, with negative numbers wrapped in (...).

Used by substitute_values().

$search

array qtype_calculated_qe2_attempt_updater::$search = []

protected

variable names wrapped in {...}.

Used by substitute_values().

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

• question/type/calculated/db/upgradelib.php