Class WidgetRegistry
A registry/factory for input widgets.
Can be used by helpers/view logic to build form widgets and other HTML widgets.
This class handles the mapping between names and concrete classes. It also has a basic name based dependency resolver that allows widgets to depend on each other.
Each widget should expect a StringTemplate instance as their first argument. All other dependencies will be included after.
Widgets can ask for the current view by using the _view
widget.
Method Detail
__constructsource public
__construct( Cake\View\StringTemplate $templates , Cake\View\View $view , string|array $widgets [] )
Constructor
Parameters
-
Cake\View\StringTemplate
$templates
- Templates instance to use.
-
Cake\View\View
$view
- The view instance to set as a widget.
- string|array
$widgets
optional [] - See add() method for more information.
_resolveWidgetsource protected
_resolveWidget( mixed $widget )
Resolves a widget spec into an instance.
Parameters
- mixed
$widget
- The widget to get
Returns
Cake\View\Widget\WidgetInterface
WidgetInterface
Throws
RuntimeException
when class cannot be loaded or does not implement WidgetInterface.
addsource public
add( array $widgets )
Adds or replaces existing widget instances/configuration with new ones.
Widget arrays can either be descriptions or instances. For example:
$registry->add([ 'label' => new MyLabelWidget($templates), 'checkbox' => ['Fancy.MyCheckbox', 'label'] ]);
The above shows how to define widgets as instances or as descriptions including dependencies. Classes can be defined with plugin notation, or fully namespaced class names.
Parameters
- array
$widgets
- Array of widgets to use.
Throws
RuntimeException
When class does not implement WidgetInterface.
getsource public
get( string $name )
Get a widget.
Will either fetch an already created widget, or create a new instance if the widget has been defined. If the widget is undefined an instance of the _default
widget will be returned. An exception will be thrown if the _default
widget is undefined.
Parameters
- string
$name
- The widget name to get.
Returns
Cake\View\Widget\WidgetInterface
widget interface class.
Throws
RuntimeException
when widget is undefined.
loadsource public
load( string $file )
Load a config file containing widgets.
Widget files should define a $config
variable containing all the widgets to load. Loaded widgets will be merged with existing widgets.
Parameters
- string
$file
- The file to load
Properties summary
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http://api.cakephp.org/3.1/class-Cake.View.Widget.WidgetRegistry.html