Inheritance diagram for qbank_statistics\columns\discriminative_efficiency:

Public Member Functions
	display ($question, $rowclasses)
	Output this column.

	display_header ()
	Output the column header cell.

	get_column_name ()
	Get the name of this column.

	get_extra_classes ()
	Any extra class names you would like applied to every cell in this column.

	get_extra_joins ()
	Return an array 'table_alias' => 'JOIN clause' to bring in any data that this column required.

	get_name ()
	Get the internal name for this column.

	get_preference ()
	Get if the preference of the row.

	get_preference_key ()
	Get if the preference key of the row.

	get_required_fields ()
	Use table alias 'q' for the question table, or one of the ones from get_extra_joins.

	get_required_statistics_fields ()
	If this column requires any aggregated statistics, it should declare that here.

	get_title ()
	Title for this column.

	get_title_tip ()
	Use this when get_title() returns something very short, and you want a longer version as a tool tip.

	has_preference ()
	Check if the row has an extra preference to view/hide.

	help_icon ()
	If you return a help icon here, it is shown in the column header after the title.

	is_extra_row ()
	Check if the column is an extra row of not.

	is_sortable ()
	Can this column be sorted on? You can return either:

	load_additional_data (array $questions)
	If this column needs extra data (e.g.

	load_question_tags (array $questions)
	Load the tags for each question.

	set_as_heading ()
	Set the column as heading.

	sort_expression ($reverse, $subsort)
	Sorts the expressions.

Protected Member Functions
	display_content ($question, $rowclasses)
	Output the contents of this column.

	display_end ($question, $rowclasses)
	Output the closing column tag.

	display_start ($question, $rowclasses)
	Output the opening column tag.

	get_classes ()
	The CSS classes to apply to every cell in this column.

	get_sort_icon ($reverse)
	Get an icon representing the corrent sort state.

	init ()
	A chance for subclasses to initialise themselves, for example to load lang strings, without having to override the constructor.

	make_sort_link ($sort, $title, $tip, $defaultreverse=false)
	Get a link that changes the sort order, and indicates the current sort state.

	sortorder ($reverse)
	Helper method for building sort clauses.

Protected Attributes
bool	$isheading = false
	determine whether the column is td or th.

view	$qbank
	$qbank the question bank view we are helping to render.

Member Function Documentation

◆ display()

core_question\local\bank\column_base::display	(		$question,
			$rowclasses )

inherited

Output this column.

Parameters

object	$question	the row from the $question table, augmented with extra information.
string	$rowclasses	CSS class names that should be applied to this row of output.

◆ display_content()

qbank_statistics\columns\discriminative_efficiency::display_content	(		$question,
			$rowclasses )

protected

Output the contents of this column.

Parameters

object	$question	the row from the $question table, augmented with extra information.
string	$rowclasses	CSS class names that should be applied to this row of output.

Reimplemented from core_question\local\bank\column_base.

◆ display_end()

core_question\local\bank\column_base::display_end	(		$question,
			$rowclasses )

protectedinherited

Output the closing column tag.

Parameters

object	$question
string	$rowclasses

Reimplemented in core_question\local\bank\row_base.

◆ display_start()

core_question\local\bank\column_base::display_start	(		$question,
			$rowclasses )

protectedinherited

Output the opening column tag.

If it is set as heading, it will use

tag instead of

Parameters

stdClass	$question
string	$rowclasses

Reimplemented in core_question\local\bank\row_base.

◆ get_classes()

core_question\local\bank\column_base::get_classes ( )

protectedinherited

The CSS classes to apply to every cell in this column.

Return values

string

◆ get_column_name()

core_question\local\bank\column_base::get_column_name ( )

inherited

Get the name of this column.

This must be unique. When using the inherited class to make many columns from one parent, ensure each instance returns a unique value.

Return values

string The unique name;

Reimplemented in qbank_customfields\custom_field_column.

◆ get_extra_classes()

qbank_statistics\columns\discriminative_efficiency::get_extra_classes ( )

Any extra class names you would like applied to every cell in this column.

Return values

array

Reimplemented from core_question\local\bank\column_base.

◆ get_extra_joins()

core_question\local\bank\column_base::get_extra_joins ( )

inherited

Return an array 'table_alias' => 'JOIN clause' to bring in any data that this column required.

The return values for all the columns will be checked. It is OK if two columns join in the same table with the same alias and identical JOIN clauses. If to columns try to use the same alias with different joins, you get an error. The only table included by default is the question table, which is aliased to 'q'.

It is importnat that your join simply adds additional data (or NULLs) to the existing rows of the query. It must not cause additional rows.

Return values

array 'table_alias' => 'JOIN clause'

Reimplemented in core_question\local\bank\action_column_base, qbank_viewcreator\creator_name_column, and qbank_viewcreator\modifier_name_column.

◆ get_name()

qbank_statistics\columns\discriminative_efficiency::get_name ( )

Get the internal name for this column.

Used as a CSS class name, and to store information about the current sort. Must match PARAM_ALPHA.

Return values

string column name.

Reimplemented from core_question\local\bank\column_base.

◆ get_preference()

core_question\local\bank\column_base::get_preference ( )

inherited

Get if the preference of the row.

Reimplemented in qbank_viewquestiontext\question_text_row.

◆ get_preference_key()

core_question\local\bank\column_base::get_preference_key ( )

inherited

Get if the preference key of the row.

Reimplemented in qbank_viewquestiontext\question_text_row.

◆ get_required_fields()

core_question\local\bank\column_base::get_required_fields ( )

inherited

Use table alias 'q' for the question table, or one of the ones from get_extra_joins.

Every field requested must specify a table prefix.

Return values

array fields required.

Reimplemented in core_question\local\bank\action_column_base, core_question\local\bank\checkbox_column, core_question\local\bank\edit_menu_column, mod_quiz\question\bank\question_name_column, mod_quiz\question\bank\question_name_text_column, qbank_deletequestion\delete_action_column, qbank_viewcreator\creator_name_column, qbank_viewcreator\modifier_name_column, qbank_viewquestionname\question_name_idnumber_tags_column, qbank_viewquestionname\viewquestionname_column_helper, qbank_viewquestiontext\question_text_row, and qbank_viewquestiontype\question_type_column.

◆ get_required_statistics_fields()

qbank_statistics\columns\discriminative_efficiency::get_required_statistics_fields ( )

If this column requires any aggregated statistics, it should declare that here.

This is those statistics can be efficiently loaded in bulk.

The statistics are all loaded just before load_additional_data is called on each column. The values are then available from $this->qbank->get_aggregate_statistic(...);

Return values

string[] the names of the required statistics fields. E.g. ['facility'].

Reimplemented from core_question\local\bank\column_base.

◆ get_sort_icon()

core_question\local\bank\column_base::get_sort_icon ( $reverse )

protectedinherited

Get an icon representing the corrent sort state.

Parameters

bool $reverse sort is descending, not ascending.

Return values

string HTML image tag.

◆ get_title()

qbank_statistics\columns\discriminative_efficiency::get_title ( )

Title for this column.

Not used if is_sortable returns an array.

Reimplemented from core_question\local\bank\column_base.

◆ get_title_tip()

core_question\local\bank\column_base::get_title_tip ( )

inherited

Use this when get_title() returns something very short, and you want a longer version as a tool tip.

Return values

string a fuller version of the name.

Reimplemented in core_question\local\bank\checkbox_column, and qbank_viewquestiontype\question_type_column.

◆ has_preference()

core_question\local\bank\column_base::has_preference ( )

inherited

Check if the row has an extra preference to view/hide.

Reimplemented in qbank_viewquestiontext\question_text_row.

◆ help_icon()

qbank_statistics\columns\discriminative_efficiency::help_icon ( )

If you return a help icon here, it is shown in the column header after the title.

Return values

help_icon|null help icon to show, if required.

Reimplemented from core_question\local\bank\column_base.

◆ init()

core_question\local\bank\column_base::init ( )

protectedinherited

A chance for subclasses to initialise themselves, for example to load lang strings, without having to override the constructor.

Reimplemented in mod_quiz\question\bank\add_action_column, qbank_deletequestion\delete_action_column, qbank_editquestion\copy_action_column, qbank_editquestion\edit_action_column, qbank_exporttoxml\export_xml_action_column, qbank_history\history_action_column, qbank_previewquestion\preview_action_column, qbank_tagquestion\tags_action_column, and qbank_viewquestiontext\question_text_row.

◆ is_extra_row()

core_question\local\bank\column_base::is_extra_row ( )

inherited

Check if the column is an extra row of not.

Reimplemented in core_question\local\bank\row_base.

◆ is_sortable()

core_question\local\bank\column_base::is_sortable ( )

inherited

Can this column be sorted on? You can return either:

false for no (the default),
a field name, if sorting this column corresponds to sorting on that datbase field.
an array of subnames to sort on as follows return [ 'firstname' => ['field' => 'uc.firstname', 'title' => get_string('firstname')], 'lastname' => ['field' => 'uc.lastname', 'title' => get_string('lastname')], ]; As well as field, and field, you can also add 'revers' => 1 if you want the default sort order to be DESC.
Return values

mixed as above.

Reimplemented in mod_quiz\question\bank\question_name_column, qbank_viewcreator\creator_name_column, qbank_viewcreator\modifier_name_column, qbank_viewquestionname\question_name_idnumber_tags_column, qbank_viewquestionname\viewquestionname_column_helper, and qbank_viewquestiontype\question_type_column.

◆ load_additional_data()

core_question\local\bank\column_base::load_additional_data ( array $questions )

inherited

If this column needs extra data (e.g.

tags) then load that here.

The extra data should be added to the question object in the array. Probably a good idea to check that another column has not already loaded the data you want.

Parameters

stdClass[] $questions the questions that will be displayed, indexed by question id.

Reimplemented in mod_quiz\question\bank\question_name_text_column, and qbank_viewquestionname\question_name_idnumber_tags_column.

◆ load_question_tags()

core_question\local\bank\column_base::load_question_tags ( array $questions )

inherited

Load the tags for each question.

Helper that can be used from {

See also: load_additional_data()};

Parameters

array $questions

◆ make_sort_link()

core_question\local\bank\column_base::make_sort_link	(	$sort,
		$title,
		$tip,
		$defaultreverse = false )

protectedinherited

Get a link that changes the sort order, and indicates the current sort state.

Parameters

string	$sort	the column to sort on.
string	$title	the link text.
string	$tip	the link tool-tip text. If empty, defaults to title.
bool	$defaultreverse	whether the default sort order for this column is descending, rather than ascending.

Return values

string

◆ sort_expression()

core_question\local\bank\column_base::sort_expression	(		$reverse,
			$subsort )

inherited

Sorts the expressions.

Parameters

bool	$reverse	Whether to sort in the reverse of the default sort order.
string	$subsort	if is_sortable returns an array of subnames, then this will be one of those. Otherwise will be empty.

Return values

string some SQL to go in the order by clause.

◆ sortorder()

core_question\local\bank\column_base::sortorder ( $reverse )

protectedinherited

Helper method for building sort clauses.

Parameters

bool $reverse whether the normal direction should be reversed.

Return values

string 'ASC' or 'DESC'

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

question/bank/statistics/classes/columns/discriminative_efficiency.php

Public Member Functions

Protected Member Functions

Protected Attributes

Member Function Documentation

◆ display()

◆ display_content()

◆ display_end()

◆ display_start()

◆ get_classes()

◆ get_column_name()

◆ get_extra_classes()

◆ get_extra_joins()

◆ get_name()

◆ get_preference()

◆ get_preference_key()

◆ get_required_fields()

◆ get_required_statistics_fields()

◆ get_sort_icon()

◆ get_title()

◆ get_title_tip()

◆ has_preference()

◆ help_icon()

◆ init()

◆ is_extra_row()

◆ is_sortable()

◆ load_additional_data()

◆ load_question_tags()

◆ make_sort_link()

◆ sort_expression()

◆ sortorder()