setting_dependency Class Reference

Generic abstract dependency class. More...

Inheritance diagram for setting_dependency:

Public Member Functions
	__construct (base_setting $setting, base_setting $dependentsetting, $defaultvalue=false)
	Creates the dependency object. More...
	destroy ()
	Destroy all circular references. More...
	enforce ()
	This function enforces the dependency. More...
	get_dependent_setting ()
	Gets the dependent setting. More...
	get_moodleform_properties ()
	Returns an array of properties suitable to be used to define a moodleforms disabled command. More...
	get_setting ()
	Gets the primary setting. More...
	is_locked ()
	Returns true if the dependent setting is locked by this setting_dependency. More...
	process_change ($changetype, $oldvalue)
	Processes a change is setting called by the primary setting. More...

Public Attributes
const	DISABLED_CHECKED = 4
const	DISABLED_EMPTY = 6
const	DISABLED_FALSE = 3
const	DISABLED_NOT_CHECKED = 5
const	DISABLED_NOT_EMPTY = 7
const	DISABLED_NOT_VALUE = 1
const	DISABLED_TRUE = 2
const	DISABLED_VALUE = 0
	Used to define the type of a dependency. More...

Protected Member Functions
	process_status_change ($oldstatus)
	All dependencies must define how they would like to deal with a status change. More...
	process_value_change ($oldvalue)
	All dependencies must define how they would like to process a value change. More...
	process_visibility_change ($oldvisibility)
	Processes a visibility change. More...

Protected Attributes
mixed	$defaultvalue
	The default setting.
base_setting	$dependentsetting
	The dependent setting (secondary)
mixed	$lastvalue
	The last value the dependent setting had.
base_setting	$setting
	The parent setting (primary)

Detailed Description

Generic abstract dependency class.

Copyright

2010 Sam Hemelryk

License

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

Constructor & Destructor Documentation

__construct()

setting_dependency::__construct	(	base_setting	$setting,
		base_setting	$dependentsetting,
			$defaultvalue = false
	)

Creates the dependency object.

Parameters

base_setting	$setting	The parent setting or the primary setting if you prefer
base_setting	$dependentsetting	The dependent setting
mixed	$defaultvalue	The default value to assign if the dependency is unmet

Reimplemented in setting_dependency_disabledif_checked, setting_dependency_disabledif_not_checked, setting_dependency_disabledif_not_empty, and setting_dependency_disabledif_empty.

Member Function Documentation

destroy()

setting_dependency::destroy

(

)

Destroy all circular references.

It helps PHP 5.2 a lot!

enforce()

setting_dependency::enforce ( )

abstract

This function enforces the dependency.

Reimplemented in setting_dependency_disabledif_equals.

get_dependent_setting()

setting_dependency::get_dependent_setting

(

)

Gets the dependent setting.

Return values

backup_setting

get_moodleform_properties()

setting_dependency::get_moodleform_properties ( )

abstract

Returns an array of properties suitable to be used to define a moodleforms disabled command.

Return values

array

Reimplemented in setting_dependency_disabledif_equals, setting_dependency_disabledif_not_equals, setting_dependency_disabledif_in_array, setting_dependency_disabledif_checked, setting_dependency_disabledif_not_checked, setting_dependency_disabledif_not_empty, and setting_dependency_disabledif_empty.

get_setting()

setting_dependency::get_setting

(

)

Gets the primary setting.

Return values

backup_setting

is_locked()

setting_dependency::is_locked ( )

abstract

Returns true if the dependent setting is locked by this setting_dependency.

Return values

bool

Reimplemented in setting_dependency_disabledif_equals.

process_change()

setting_dependency::process_change (   $changetype,   $oldvalue  )

final

Processes a change is setting called by the primary setting.

Parameters

int	$changetype
mixed	$oldvalue

Return values

bool

process_status_change()

setting_dependency::process_status_change (   $oldstatus )

abstractprotected

All dependencies must define how they would like to deal with a status change.

Parameters

int

$oldstatus

Reimplemented in setting_dependency_disabledif_equals.

process_value_change()

setting_dependency::process_value_change (   $oldvalue )

abstractprotected

All dependencies must define how they would like to process a value change.

Reimplemented in setting_dependency_disabledif_equals.

process_visibility_change()

setting_dependency::process_visibility_change (   $oldvisibility )

protected

Processes a visibility change.

Parameters

bool

$oldvisibility

Return values

bool

Member Data Documentation

DISABLED_VALUE

const setting_dependency::DISABLED_VALUE = 0

Used to define the type of a dependency.

Note with these that checked and true, and not checked and false are equal. This is because the terminology differs but the resulting action is the same. Reduces code!

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

• backup/util/settings/setting_dependency.class.php