moodle_list Class Reference

Clues to reading this code: More...

Inheritance diagram for moodle_list:

Public Member Functions
	__construct ($type='ul', $attributes='', $editable=false, $pageurl=null, $page=0, $pageparamname='page', $itemsperpage=20)
	Constructor. More...
	add_item ($item)
	display_page_numbers ()
	display list of page numbers for navigation
	find_item ($id, $suppresserror=false)
	Recurse down the tree and find an item by it's id. More...
	get_child_ids ()
	Returns an array of ids of child items. More...
	get_items_peers ($itemid)
	Returns an array of ids of peers of an item. More...
	get_records ()
	Should be overriden to return an array of records of list items.
	get_top_level_parent_id ($item)
	Returns the value to be used as the parent for the $item when it goes to the top level. More...
	item_is_first_on_page ($itemid)
	item_is_last_on_page ($itemid)
	list_from_records ($paged=false, $offset=0)
	Produces a hierarchical tree of list items from a flat array of records. More...
	move_item_left ($id)
	Moves the item one step up in the tree. More...
	move_item_right ($id)
	Make item with id $id the child of the peer that is just above it in the sort order. More...
	move_item_up_down ($direction, $id)
	Move a record up or down. More...
	process_actions ($left, $right, $moveup, $movedown)
	process any actions. More...
	reorder_peers ($peers)
	set_parent ($parent)
	to_html ($indent=0, $extraargs=array())
	Returns html string. More...

Public Attributes
	$attributes
array	$childparent
	keys are child ids, values are parents.
	$editable
	$fieldnamesparent = 'parent'
	$firstitem = 1
array	$items = array()
	of $listitemclassname objects.
	$lastitem = 999999
	$listitemclassname = 'list_item'
	$offset = 0
	$page = 0
	$pagecount
	$paged = false
	$pageparamname
	$pageurl
list_item	$parentitem = null
	or derived class.
array	$records = array()
	Records from db, only used in top level list.
	$table
string	$type
	'ol' or 'ul'.

Detailed Description

Clues to reading this code:

The functions that move things around the tree structure just update the database - they don't update the in-memory structure, instead they trigger a page reload so everything is rebuilt from scratch.

Copyright

Jamie Pratt

License

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

Constructor & Destructor Documentation

__construct()

moodle_list::__construct	(		$type = 'ul',
			$attributes = '',
			$editable = false,
			$pageurl = null,
			$page = 0,
			$pageparamname = 'page',
			$itemsperpage = 20
	)

Constructor.

Parameters

string	$type
string	$attributes
boolean	$editable
moodle_url	$pageurl	url for this page
integer	$page	if 0 no pagination. (These three params only used in top level list.)
string	$pageparamname	name of url param that is used for passing page no
integer	$itemsperpage	no of top level items.

Member Function Documentation

find_item()

moodle_list::find_item	(		$id,
			$suppresserror = false
	)

Recurse down the tree and find an item by it's id.

Parameters

integer	$id
boolean	$suppresserror	error if not item found?

Return values

list_item

copy or null if item is not found

get_child_ids()

moodle_list::get_child_ids

(

)

Returns an array of ids of child items.

Return values

array

peer ids

get_items_peers()

moodle_list::get_items_peers

(

$itemid

)

Returns an array of ids of peers of an item.

Parameters

int	itemid - if given, restrict records to those with this parent id.

Return values

array

peer ids

get_top_level_parent_id()

moodle_list::get_top_level_parent_id

(

$item

)

Returns the value to be used as the parent for the $item when it goes to the top level.

Override if needed.

Parameters

list_item

$item

The item which its top level parent is going to be returned.

Return values

int

Reimplemented in question_category_list.

item_is_first_on_page()

moodle_list::item_is_first_on_page

(

$itemid

)

Parameters

integer

$itemid

an item id.

Return values

boolean

Is the item with the given id the first top-level item on the current page?

item_is_last_on_page()

moodle_list::item_is_last_on_page

(

$itemid

)

Parameters

integer

$itemid

an item id.

Return values

boolean

Is the item with the given id the last top-level item on the current page?

list_from_records()

moodle_list::list_from_records	(		$paged = false,
			$offset = 0
	)

Produces a hierarchical tree of list items from a flat array of records.

'parent' field is expected to point to a parent record. records are already sorted. If the parent field doesn't point to another record in the array then this is a top level list

Parameters

integer

$offset

how many list toplevel items are there in lists before this one

Return values

array(boolean,integer)

whether there is more than one page, $offset + how many toplevel items where there in this list.

move_item_left()

moodle_list::move_item_left

(

$id

)

Moves the item one step up in the tree.

Parameters

int

$id

an item index.

Return values

list_item

the item that used to be the parent of the item moved.

move_item_right()

moodle_list::move_item_right

(

$id

)

Make item with id $id the child of the peer that is just above it in the sort order.

Parameters

integer

$id

move_item_up_down()

moodle_list::move_item_up_down	(		$direction,
			$id
	)

Move a record up or down.

Parameters

string	$direction	up / down
integer	$id

process_actions()

moodle_list::process_actions	(		$left,
			$right,
			$moveup,
			$movedown
	)

process any actions.

Parameters

integer	$left	id of item to move left
integer	$right	id of item to move right
integer	$moveup	id of item to move up
integer	$movedown	id of item to move down

Return values

unknown

Reimplemented in question_category_list.

to_html()

moodle_list::to_html	(		$indent = 0,
			$extraargs = array()
	)

Returns html string.

Parameters

integer

$indent

depth of indentation.

---

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

• lib/listlib.php