Renderer base classes for question types. More...

Inheritance diagram for qtype_renderer:

Public Member Functions
	__call ($method, $arguments)
	Magic method used to pass calls otherwise meant for the standard renderer to it to ensure we don't go causing unnecessary grief.

	add_action_handler (component_action $action, $id=null)
	Adds a JS action for the element with the provided id.

	clear_wrong (question_attempt $qa)
	Output hidden form fields to clear any wrong parts of the student's response.

	feedback (question_attempt $qa, question_display_options $options)
	Generate the display of the outcome part of the question.

	formulation_and_controls (question_attempt $qa, question_display_options $options)
	Generate the display of the formulation part of the question.

	formulation_heading ()
	In the question output there are some class="accesshide" headers to help screen-readers.

	get_compact_logo_url ($maxwidth=300, $maxheight=300)
	Return the site's compact logo URL, if any.

	get_logo_url ($maxwidth=null, $maxheight=200)
	Return the site's logo URL, if any.

	has_started ()
	Returns true is output has already started, and false if not.

	head_code (question_attempt $qa)
	Return any HTML that needs to be included in the page's <head> when this question is used.

	image_url ($imagename, $component='moodle')
	Return the moodle_url for an image.

	manual_comment (question_attempt $qa, question_display_options $options)
	Display any extra question-type specific content that should be visible when grading, if appropriate.

	pix_url ($imagename, $component='moodle')
	Return the direct URL for an image from the pix folder.

	render (renderable $widget)
	Renders the provided widget and returns the HTML to display it.

	render_from_template ($templatename, $context)
	Renders a template by name with the given context.

	should_display_main_logo ($headinglevel=1)
	Whether we should display the main logo.

	should_display_navbar_logo ()
	Whether we should display the logo in the navbar.

Static Public Member Functions
static	prepare_classes ($classes)
	Given an array or space-separated list of classes, prepares and returns the HTML class attribute value.

Protected Member Functions
	correct_response (question_attempt $qa)
	Gereate an automatic description of the correct response to this question.

	feedback_class ($fraction)

	feedback_image ($fraction, $selected=true)
	Return an appropriate icon (green tick, red cross, etc.) for a grade.

	general_feedback (question_attempt $qa)
	Gereate the general feedback.

	get_mustache ()
	Return an instance of the mustache class.

	hint (question_attempt $qa, question_hint $hint)
	Gereate the specific feedback.

	num_parts_correct (question_attempt $qa)
	Gereate a brief statement of how many sub-parts of this question the student got right.

	specific_feedback (question_attempt $qa)
	Generate the specific feedback.

Protected Attributes
xhtml_container_stack	$opencontainers
	The xhtml_container_stack to use.

renderer_base core_renderer	$output
	A reference to the current renderer.

moodle_page	$page
	The Moodle page the renderer has been created to assist with.

string	$target
	The requested rendering target.

array	$templatecache = []
	$templatecache The mustache template cache.

Detailed Description

Renderer base classes for question types.

Copyright: 2009 The Open University

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

Member Function Documentation

◆ __call()

plugin_renderer_base::__call	(		$method,
			$arguments )

inherited

Magic method used to pass calls otherwise meant for the standard renderer to it to ensure we don't go causing unnecessary grief.

Parameters

string	$method
array	$arguments

Return values

mixed

◆ add_action_handler()

renderer_base::add_action_handler	(	component_action	$action,
			$id = null )

inherited

Adds a JS action for the element with the provided id.

This method adds a JS event for the provided component action to the page and then returns the id that the event has been attached to. If no id has been provided then a new ID is generated by html_writer::random_id()

Parameters

component_action	$action
string	$id

Return values

string id of element, either original submitted or random new if not supplied

◆ clear_wrong()

qtype_renderer::clear_wrong ( question_attempt $qa )

Output hidden form fields to clear any wrong parts of the student's response.

This method will only be called if the question is in read-only mode.

Parameters

question_attempt $qa the question attempt to display.

Return values

string HTML fragment.

Reimplemented in qtype_ddtoimage_renderer_base.

◆ correct_response()

qtype_renderer::correct_response ( question_attempt $qa )

protected

Gereate an automatic description of the correct response to this question.

Not all question types can do this. If it is not possible, this method should just return an empty string.

Parameters

question_attempt $qa the question attempt to display.

Return values

string HTML fragment.

Reimplemented in qtype_calculated_renderer, qtype_ddtoimage_renderer_base, qtype_elements_embedded_in_question_text_renderer, qtype_match_renderer, qtype_multianswer_renderer, qtype_multichoice_multi_renderer, qtype_multichoice_single_renderer, qtype_numerical_renderer, qtype_shortanswer_renderer, and qtype_truefalse_renderer.

◆ feedback()

qtype_renderer::feedback	(	question_attempt	$qa,
		question_display_options	$options )

Generate the display of the outcome part of the question.

This is the area that contains the various forms of feedback. This function generates the content of this area belonging to the question type.

Subclasses will normally want to override the more specific methods {specific_feedback()}, {general_feedback()} and {correct_response()} that this method calls.

Parameters

question_attempt	$qa	the question attempt to display.
question_display_options	$options	controls what should and should not be displayed.

Return values

string HTML fragment.

◆ feedback_image()

qtype_renderer::feedback_image	(		$fraction,
			$selected = true )

protected

Return an appropriate icon (green tick, red cross, etc.) for a grade.

Parameters

float	$fraction	grade on a scale 0..1.
bool	$selected	whether to show a big or small icon. (Deprecated)

Return values

string html fragment.

◆ formulation_and_controls()

qtype_renderer::formulation_and_controls	(	question_attempt	$qa,
		question_display_options	$options )

Generate the display of the formulation part of the question.

This is the area that contains the quetsion text, and the controls for students to input their answers. Some question types also embed bits of feedback, for example ticks and crosses, in this area.

Parameters

question_attempt	$qa	the question attempt to display.
question_display_options	$options	controls what should and should not be displayed.

Return values

string HTML fragment.

Reimplemented in qtype_ddmarker_renderer, qtype_ddtoimage_renderer_base, qtype_ddwtos_renderer, qtype_description_renderer, qtype_elements_embedded_in_question_text_renderer, qtype_essay_renderer, qtype_match_renderer, qtype_multianswer_renderer, qtype_multichoice_renderer_base, qtype_numerical_renderer, qtype_shortanswer_renderer, and qtype_truefalse_renderer.

◆ formulation_heading()

qtype_renderer::formulation_heading ( )

In the question output there are some class="accesshide" headers to help screen-readers.

This method returns the text to use for the heading above the formulation_and_controls section.

Return values

string to use as the heading.

Reimplemented in qtype_description_renderer.

◆ general_feedback()

qtype_renderer::general_feedback ( question_attempt $qa )

protected

Gereate the general feedback.

This is feedback is shown ot all students.

Parameters

question_attempt $qa the question attempt to display.

Return values

string HTML fragment.

◆ get_compact_logo_url()

renderer_base::get_compact_logo_url	(		$maxwidth = 300,
			$maxheight = 300 )

inherited

Return the site's compact logo URL, if any.

Parameters

int	$maxwidth	The maximum width, or null when the maximum width does not matter.
int	$maxheight	The maximum height, or null when the maximum height does not matter.

Return values

moodle_url|false

◆ get_logo_url()

renderer_base::get_logo_url	(		$maxwidth = null,
			$maxheight = 200 )

inherited

Return the site's logo URL, if any.

Parameters

int	$maxwidth	The maximum width, or null when the maximum width does not matter.
int	$maxheight	The maximum height, or null when the maximum height does not matter.

Return values

moodle_url|false

◆ get_mustache()

renderer_base::get_mustache ( )

protectedinherited

Return an instance of the mustache class.

Since: 2.9

Return values

Mustache_Engine

◆ has_started()

renderer_base::has_started ( )

inherited

Returns true is output has already started, and false if not.

Return values

boolean true if the header has been printed.

◆ head_code()

qtype_renderer::head_code ( question_attempt $qa )

Return any HTML that needs to be included in the page's <head> when this question is used.

Parameters

$qa	the question attempt that will be displayed on the page.

Return values

string HTML fragment.

◆ hint()

qtype_renderer::hint	(	question_attempt	$qa,
		question_hint	$hint )

protected

Gereate the specific feedback.

This is feedback that varies according to the response the student gave.

Parameters

question_attempt $qa the question attempt to display.

Return values

string HTML fragment.

Reimplemented in qtype_ddmarker_renderer.

◆ image_url()

renderer_base::image_url	(		$imagename,
			$component = 'moodle' )

inherited

Return the moodle_url for an image.

The exact image location and extension is determined automatically by searching for gif|png|jpg|jpeg, please note there can not be diferent images with the different extension. The imagename is for historical reasons a relative path name, it may be changed later for core images. It is recommended to not use subdirectories in plugin and theme pix directories.

There are three types of images: 1/ theme images - stored in theme/mytheme/pix/, use component 'theme' 2/ core images - stored in /pix/, overridden via theme/mytheme/pix_core/ 3/ plugin images - stored in mod/mymodule/pix, overridden via theme/mytheme/pix_plugins/mod/mymodule/, example: image_url('comment', 'mod_glossary')

Parameters

string	$imagename	the pathname of the image
string	$component	full plugin name (aka component) or 'theme'

Return values

moodle_url

◆ manual_comment()

qtype_renderer::manual_comment	(	question_attempt	$qa,
		question_display_options	$options )

Display any extra question-type specific content that should be visible when grading, if appropriate.

Parameters

question_attempt	$qa	a question attempt.
question_display_options	$options	controls what should and should not be displayed.

Return values

string HTML fragment.

Reimplemented in qtype_essay_renderer.

◆ num_parts_correct()

qtype_renderer::num_parts_correct ( question_attempt $qa )

protected

Gereate a brief statement of how many sub-parts of this question the student got right.

Parameters

question_attempt $qa the question attempt to display.

Return values

string HTML fragment.

Reimplemented in qtype_multichoice_multi_renderer.

◆ pix_url()

renderer_base::pix_url	(		$imagename,
			$component = 'moodle' )

inherited

Return the direct URL for an image from the pix folder.

Use this function sparingly and never for icons. For icons use pix_icon or the pix helper in a mustache template.

Deprecated: since Moodle 3.3

Parameters

string	$imagename	the name of the icon.
string	$component	specification of one plugin like in get_string()

Return values

moodle_url

◆ prepare_classes()

static renderer_base::prepare_classes ( $classes )

staticinherited

Given an array or space-separated list of classes, prepares and returns the HTML class attribute value.

Parameters

mixed $classes Space-separated string or array of classes

Return values

string HTML class attribute value

◆ render()

plugin_renderer_base::render ( renderable $widget )

inherited

Renders the provided widget and returns the HTML to display it.

Parameters

renderable $widget instance with renderable interface

Return values

string

Reimplemented from renderer_base.

Reimplemented in core_courseformat\output\section_renderer, and tool_policy\output\renderer.

◆ render_from_template()

renderer_base::render_from_template	(		$templatename,
			$context )

inherited

Renders a template by name with the given context.

The provided data needs to be array/stdClass made up of only simple types. Simple types are array,stdClass,bool,int,float,string

Since: 2.9

Parameters

array | stdClass $context Context containing data for the template.

Return values

string|boolean

◆ should_display_main_logo()

renderer_base::should_display_main_logo ( $headinglevel = 1 )

inherited

Whether we should display the main logo.

Deprecated: since Moodle 4.0

Todo: final deprecation. To be removed in Moodle 4.4 MDL-73165.

Parameters

int $headinglevel The heading level we want to check against.

Return values

bool

◆ should_display_navbar_logo()

renderer_base::should_display_navbar_logo ( )

inherited

Whether we should display the logo in the navbar.

We will when there are no main logos, and we have compact logo.

Return values

bool

◆ specific_feedback()

qtype_renderer::specific_feedback ( question_attempt $qa )

protected

Generate the specific feedback.

This is feedback that varies according to the response the student gave.

Parameters

question_attempt $qa the question attempt to display.

Return values

string HTML fragment.

Reimplemented in qtype_ddtoimage_renderer_base, qtype_elements_embedded_in_question_text_renderer, qtype_match_renderer, qtype_multichoice_renderer_base, qtype_numerical_renderer, qtype_shortanswer_renderer, and qtype_truefalse_renderer.

Member Data Documentation

◆ $output

renderer_base core_renderer plugin_renderer_base::$output

protectedinherited

A reference to the current renderer.

The renderer provided here will be determined by the page but will in 90% of cases by the core_renderer

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

question/type/rendererbase.php

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Member Function Documentation

◆ __call()

◆ add_action_handler()

◆ clear_wrong()

◆ correct_response()

◆ feedback()

◆ feedback_image()

◆ formulation_and_controls()

◆ formulation_heading()

◆ general_feedback()

◆ get_compact_logo_url()

◆ get_logo_url()

◆ get_mustache()

◆ has_started()

◆ head_code()

◆ hint()

◆ image_url()

◆ manual_comment()

◆ num_parts_correct()

◆ pix_url()

◆ prepare_classes()

◆ render()

◆ render_from_template()

◆ should_display_main_logo()

◆ should_display_navbar_logo()

◆ specific_feedback()

Member Data Documentation

◆ $output