OptionGroup class

The OptionGroup widget (HTML's optgroup tag).

Inheritance

• Object
• Widget
• HTMLWidgetBase
• OptionGroup

Constructors

OptionGroup({String? label, bool? disabled, Key? key, NullableElementCallback? ref, String? id, String? title, String? style, String? className, bool? hidden, String? innerText, Widget? child, List<Widget>? children, EventCallback? onClick, Map<String, String>? additionalAttributes})

const

Properties

additionalAttributes → Map<String, String>?

Any additional attributes.

final, inherited

child → Widget?

Child widget.

final, inherited

children → List<Widget>?

Multiple child widgets.

final, inherited

className → String?

The classes attribute specifies one or more class names for an dom node.

final, inherited

correspondingTag → DomTagType

Corresponding HTML tag to use to render this widget

no setter, override

disabled → bool?

If this Boolean attribute is set, none of the items in this option group is selectable. Often browsers grey out such control and it won't receive any browsing events, like mouse clicks or focus-related ones.

final

hashCode → int

The hash code for this object.

no setter, inherited

hidden → bool?

The hidden attribute is a boolean attribute. When present, it specifies that an dom node is not yet, or is no longer, relevant.

final, inherited

id → String?

ID of dom node.

final, inherited

innerText → String?

Element's inner text.

final, inherited

key → Key?

Keys help Rad identify which widgets have changed, are added, or are removed when a widget has multiple sibling widgets.

final, inherited

label → String?

The name of the group of options, which the browser can use when labeling the options in the user interface.

final

onClick → EventCallback?

On click event listener.

final, inherited

ref → NullableElementCallback?

Reference callback.

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

style → String?

The style attribute for inline CSS.

final, inherited

title → String?

The title attribute specifies extra information about an dom node.

final, inherited

widgetCaptureEventListeners → Map<DomEventType, EventCallback?>

Events that this widget is listening to in capturing phase.

no setter, inherited

widgetEventListeners → Map<DomEventType, EventCallback?>

Events that this widget is listening to in bubbling phase.

no setter, inherited

Methods

createRenderElement(RenderElement parent) → RenderElement

Create element for current widget.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

shouldUpdateWidget(covariant OptionGroup oldWidget) → bool

Whether to update current widget.

override

shouldUpdateWidgetChildren(Widget oldWidget, bool shouldUpdateWidget) → bool

Whether to update current widget's children.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited